"""
@package gmodeler.model

@brief wxGUI Graphical Modeler (base classes & read/write)

Classes:
 - model::Model
 - model::ModelObject
 - model::ModelAction
 - model::ModelData
 - model::ModelRelation
 - model::ModelItem
 - model::ModelLoop
 - model::ModelCondition
 - model::ModelComment
 - model::ProcessModelFile
 - model::WriteModelFile
 - model::WritePythonFile
 - model::ModelParamDialog

(C) 2010-2018 by the GRASS Development Team

This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.

@author Martin Landa <landa.martin gmail.com>
@author Python parameterization Ondrej Pesek <pesej.ondrek gmail.com>
"""

import os
import getpass
import copy
import re
import mimetypes
import time
import six
try:
    import xml.etree.ElementTree as etree
except ImportError:
    import elementtree.ElementTree as etree  # Python <= 2.4

import xml.sax.saxutils as saxutils

import wx
from wx.lib import ogl

from core import globalvar
from core import utils
from core.gcmd import GMessage, GException, GError, RunCommand, GWarning, GetDefaultEncoding
from core.settings import UserSettings
from gui_core.forms import GUI, CmdPanel
from gui_core.widgets import GNotebook
from gui_core.wrap import Button
from gmodeler.giface import GraphicalModelerGrassInterface

from grass.script import core as grass
from grass.script import task as gtask


class Model(object):
    """Class representing the model"""

    def __init__(self, canvas=None):
        self.items = list()  # list of ordered items (action/loop/condition)

        # model properties
        self.properties = {
            'name': _("model"),
            'description': _("Script generated by wxGUI Graphical Modeler."),
            'author': getpass.getuser()}
        # model variables
        self.variables = dict()
        self.variablesParams = dict()

        self.canvas = canvas

    def GetCanvas(self):
        """Get canvas or None"""
        return self.canvas

    def GetItems(self, objType=None):
        """Get list of model items

        :param objType: Object type to filter model objects
        """
        if not objType:
            return self.items

        result = list()
        for item in self.items:
            if isinstance(item, objType):
                result.append(item)

        return result

    def GetItem(self, aId, objType=None):
        """Get item of given id

        :param aId: item id

        :return: Model* instance
        :return: None if no item found
        """
        ilist = self.GetItems(objType)
        for item in ilist:
            if item.GetId() == aId:
                return item

        return None

    def GetItemIndex(self, item):
        """Return list index of given item"""
        return self.items.index(item)

    def GetNumItems(self, actionOnly=False):
        """Get number of items"""
        if actionOnly:
            return len(self.GetItems(objType=ModelAction))

        return len(self.GetItems())

    def ReorderItems(self, idxList):
        items = list()
        for oldIdx, newIdx in six.iteritems(idxList):
            item = self.items.pop(oldIdx)
            items.append(item)
            self.items.insert(newIdx, item)
            # try:
            #     nextItem = self.items[newIdx+1]
            # except IndexError:
            #     continue # newIdx is the last item in the list
            # items.append(nextItem)
            # x = item.GetX()
            # y = item.GetY()
            # item.SetX(nextItem.GetX())
            # item.SetY(nextItem.GetY())
            # nextItem.SetX(x)
            # nextItem.SetY(y)

        dc = wx.ClientDC(self.canvas)
        for item in items:
            item.MoveLinks(dc)
            for mo in item.GetBlock():
                if isinstance(mo, ModelLoop):
                    self.canvas.parent.DefineLoop(mo)
                elif isinstance(mo, ModelCondition):
                    self.canvas.parent.DefineCondition(mo)

    def Normalize(self):
        # check for inconsistecies
        for idx in range(1, len(self.items)):
            if not self.items[idx].GetBlock() and \
                    isinstance(self.items[idx - 1], ModelLoop):
                # swap action not-in-block with previously defined
                # loop
                itemPrev = self.items[idx - 1]
                self.items[idx - 1] = self.items[idx]
                self.items[idx] = itemPrev

        # update ids
        iId = 1
        for item in self.items:
            item.SetId(iId)
            item.SetLabel()
            iId += 1

    def GetNextId(self):
        """Get next id (data ignored)

        :return: next id to be used (default: 1)
        """
        if len(self.items) < 1:
            return 1

        currId = self.items[-1].GetId()
        if currId > 0:
            return currId + 1

        return 1

    def GetProperties(self):
        """Get model properties"""
        return self.properties

    def GetVariables(self, params=False):
        """Get model variables"""
        if params:
            return self.variablesParams

        return self.variables

    def SetVariables(self, data):
        """Set model variables"""
        self.variables = data

    def Reset(self):
        """Reset model"""
        self.items = list()

    def RemoveItem(self, item, reference=None):
        """Remove item from model

        :item: item to be removed
        :reference: reference item valid for deletion

        :return: list of related items to remove/update
        """
        relList = list()
        upList = list()
        doRemove = True

        if isinstance(item, ModelAction):
            for rel in item.GetRelations():
                relList.append(rel)
                data = rel.GetData()
                if len(data.GetRelations()) < 2:
                    relList.append(data)
                else:
                    upList.append(data)

        elif isinstance(item, ModelData):
            for rel in item.GetRelations():
                otherItem = rel.GetTo() if rel.GetFrom() == item else rel.GetFrom()
                if reference and reference != otherItem:
                    doRemove = False
                    continue  # avoid recursive deletion
                relList.append(rel)
                if reference and reference != otherItem:
                    relList.append(otherItem)
            if not doRemove:
                upList.append(item)

        elif isinstance(item, ModelLoop):
            for rel in item.GetRelations():
                relList.append(rel)
            for action in self.GetItems():
                action.UnSetBlock(item)

        if doRemove and item in self.items:
            self.items.remove(item)

        return relList, upList

    def FindAction(self, aId):
        """Find action by id"""
        alist = self.GetItems(objType=ModelAction)
        for action in alist:
            if action.GetId() == aId:
                return action

        return None

    def GetMaps(self, prompt):
        """Get list of maps of selected type

        :param prompt: to filter maps"""
        maps = list()
        for data in self.GetData():
            if prompt == data.GetPrompt():
                mapName = data.GetValue()
                if not mapName or mapName[0] is '%':
                    continue  # skip variables
                maps.append(mapName)

        return maps

    def GetData(self):
        """Get list of data items"""
        result = list()
        dataItems = self.GetItems(objType=ModelData)

        for action in self.GetItems(objType=ModelAction):
            for rel in action.GetRelations():
                dataItem = rel.GetData()
                if dataItem not in result:
                    result.append(dataItem)
                if dataItem in dataItems:
                    dataItems.remove(dataItem)

        # standalone data
        if dataItems:
            result += dataItems

        return result

    def FindData(self, value, prompt):
        """Find data item in the model

        :param value: value
        :param prompt: prompt

        :return: ModelData instance
        :return: None if not found
        """
        for data in self.GetData():
            if data.GetValue() == value and \
                    data.GetPrompt() == prompt:
                return data

        return None

    def LoadModel(self, filename):
        """Load model definition stored in GRASS Model XML file (gxm)

        .. todo::
             Validate against DTD

        Raise exception on error.
        """
        dtdFilename = os.path.join(globalvar.WXGUIDIR, "xml", "grass-gxm.dtd")

        # parse workspace file
        try:
            gxmXml = ProcessModelFile(etree.parse(filename))
        except Exception as e:
            raise GException(unicode(e))

        if self.canvas:
            win = self.canvas.parent
            if gxmXml.pos:
                win.SetPosition(gxmXml.pos)
            if gxmXml.size:
                win.SetSize(gxmXml.size)

        # load properties
        self.properties = gxmXml.properties
        self.variables = gxmXml.variables

        # load actions
        for action in gxmXml.actions:
            actionItem = ModelAction(parent=self,
                                     x=action['pos'][0],
                                     y=action['pos'][1],
                                     width=action['size'][0],
                                     height=action['size'][1],
                                     task=action['task'],
                                     id=action['id'],
                                     label=action['label'],
                                     comment=action['comment'])

            if action['disabled']:
                actionItem.Enable(False)

            self.AddItem(actionItem, pos=actionItem.GetId() - 1)

            actionItem.SetValid(actionItem.GetTask().get_options())
            actionItem.GetLog()  # substitute variables (-> valid/invalid)

        # load data & relations
        for data in gxmXml.data:
            dataItem = ModelData(parent=self,
                                 x=data['pos'][0],
                                 y=data['pos'][1],
                                 width=data['size'][0],
                                 height=data['size'][1],
                                 prompt=data['prompt'],
                                 value=data['value'])
            dataItem.SetIntermediate(data['intermediate'])
            dataItem.SetHasDisplay(data['display'])

            for rel in data['rels']:
                actionItem = self.FindAction(rel['id'])

                if rel['dir'] == 'from':
                    relation = ModelRelation(
                        parent=self,
                        fromShape=dataItem,
                        toShape=actionItem,
                        param=rel['name'])
                else:
                    relation = ModelRelation(
                        parent=self,
                        fromShape=actionItem,
                        toShape=dataItem,
                        param=rel['name'])
                relation.SetControlPoints(rel['points'])
                actionItem.AddRelation(relation)
                dataItem.AddRelation(relation)

            if self.canvas:
                dataItem.Update()

        # load loops
        for loop in gxmXml.loops:
            loopItem = ModelLoop(parent=self,
                                 x=loop['pos'][0],
                                 y=loop['pos'][1],
                                 width=loop['size'][0],
                                 height=loop['size'][1],
                                 label=loop['text'],
                                 id=loop['id'])
            self.AddItem(loopItem, pos=loopItem.GetId() - 1)

        # load conditions
        for condition in gxmXml.conditions:
            conditionItem = ModelCondition(parent=self,
                                           x=condition['pos'][0],
                                           y=condition['pos'][1],
                                           width=condition['size'][0],
                                           height=condition['size'][1],
                                           label=condition['text'],
                                           id=condition['id'])
            self.AddItem(conditionItem, pos=conditionItem.GetId() - 1)

        # define loops & if/else items
        for loop in gxmXml.loops:
            loopItem = self.GetItem(loop['id'], objType=ModelLoop)
            loopItem.SetItems(loop['items'])
            for idx in loop['items']:
                action = self.GetItem(idx, objType=ModelAction)
                action.SetBlock(loopItem)

        for condition in gxmXml.conditions:
            conditionItem = self.GetItem(condition['id'])
            for b in condition['items'].keys():
                alist = list()
                for aId in condition['items'][b]:
                    action = self.GetItem(aId)
                    alist.append(action)
                conditionItem.SetItems(alist, branch=b)

            items = conditionItem.GetItems()
            for b in items.keys():
                for action in items[b]:
                    action.SetBlock(conditionItem)

        # load comments
        for comment in gxmXml.comments:
            commentItem = ModelComment(parent=self,
                                       x=comment['pos'][0],
                                       y=comment['pos'][1],
                                       width=comment['size'][0],
                                       height=comment['size'][1],
                                       id=comment['id'],
                                       label=comment['text'])

            self.AddItem(commentItem, pos=commentItem.GetId() - 1)

    def AddItem(self, newItem, pos=-1):
        """Add item to the list"""
        if pos != -1:
            self.items.insert(pos, newItem)
        else:
            self.items.append(newItem)
        # i = 1
        # for item in self.items:
        #     item.SetId(i)
        #     i += 1

    def IsValid(self):
        """Return True if model is valid"""
        if self.Validate():
            return False

        return True

    def Validate(self):
        """Validate model, return None if model is valid otherwise
        error string"""
        errList = list()

        variables = self.GetVariables().keys()
        pattern = re.compile(r'(.*)(%.+\s?)(.*)')
        for action in self.GetItems(objType=ModelAction):
            cmd = action.GetLog(string=False)

            task = GUI(show=None).ParseCommand(cmd=cmd)
            errList += map(lambda x: cmd[0] + ': ' + x, task.get_cmd_error())

            # check also variables
            for opt in cmd[1:]:
                if '=' not in opt:
                    continue
                key, value = opt.split('=', 1)
                sval = pattern.search(value)
                if sval:
                    var = sval.group(2).strip()[1:]  # strip '%' from beginning
                    found = False
                    for v in variables:
                        if var.startswith(v):
                            found = True
                            break
                    if not found:
                        report = True
                        for item in filter(
                                lambda x: isinstance(x, ModelLoop),
                                action.GetBlock()):
                            if var in item.GetLabel():
                                report = False
                                break
                        if report:
                            errList.append(
                                cmd[0] +
                                ": " +
                                _("undefined variable '%s'") %
                                var)
            # TODO: check variables in file only optionally
            ### errList += self._substituteFile(action, checkOnly = True)

        return errList

    def _substituteFile(self, item, params=None, checkOnly=False):
        """Subsitute variables in command file inputs

        :param bool checkOnly: tuble - True to check variable, don't touch files

        :return: list of undefined variables
        """
        errList = list()

        self.fileInput = dict()

        # collect ascii inputs
        for p in item.GetParams()['params']:
            if p.get('element', '') == 'file' and \
                    p.get('prompt', '') == 'input' and \
                    p.get('age', '') == 'old':
                filename = p.get('value', p.get('default', ''))
                if filename and \
                        mimetypes.guess_type(filename)[0] == 'text/plain':
                    self.fileInput[filename] = None

        for finput in self.fileInput:
            # read lines
            fd = open(finput, "r")
            try:
                data = self.fileInput[finput] = fd.read()
            finally:
                fd.close()

            # substitute variables
            write = False
            variables = self.GetVariables()
            for variable in variables:
                pattern = re.compile('%' + variable)
                value = ''
                if params and 'variables' in params:
                    for p in params['variables']['params']:
                        if variable == p.get('name', ''):
                            if p.get('type', 'string') == 'string':
                                value = p.get('value', '')
                            else:
                                value = str(p.get('value', ''))
                            break

                if not value:
                    value = variables[variable].get('value', '')

                data = pattern.sub(value, data)
                if not checkOnly:
                    write = True

            pattern = re.compile(r'(.*)(%.+\s?)(.*)')
            sval = pattern.search(data)
            if sval:
                var = sval.group(2).strip()[1:]  # ignore '%'
                cmd = item.GetLog(string=False)[0]
                errList.append(cmd + ": " + _("undefined variable '%s'") % var)

            if not checkOnly:
                if write:
                    fd = open(finput, "w")
                    try:
                        fd.write(data)
                    finally:
                        fd.close()
                else:
                    self.fileInput[finput] = None

        return errList

    def OnPrepare(self, item, params):
        self._substituteFile(item, params, checkOnly=False)

    def RunAction(self, item, params, log, onDone=None,
                  onPrepare=None, statusbar=None):
        """Run given action

        :param item: action item
        :param params: parameters dict
        :param log: logging window
        :param onDone: on-done method
        :param onPrepare: on-prepare method
        :param statusbar: wx.StatusBar instance or None
        """
        name = '({0}) {1}'.format(item.GetId(), item.GetLabel())
        if name in params:
            paramsOrig = item.GetParams(dcopy=True)
            item.MergeParams(params[name])

        if statusbar:
            statusbar.SetStatusText(_('Running model...'), 0)

        data = {'item': item,
                'params': copy.deepcopy(params)}
        log.RunCmd(command=item.GetLog(string=False, substitute=params),
                   onDone=onDone, onPrepare=self.OnPrepare, userData=data)

        if name in params:
            item.SetParams(paramsOrig)

    def Run(self, log, onDone, parent=None):
        """Run model

        :param log: logging window (see gconsole.GConsole)
        :param onDone: on-done method
        :param parent: window for messages or None
        """
        if self.GetNumItems() < 1:
            GMessage(parent=parent,
                     message=_('Model is empty. Nothing to run.'))
            return

        statusbar = None
        if isinstance(parent, wx.Frame):
            statusbar = parent.GetStatusBar()

        # validation
        if statusbar:
            statusbar.SetStatusText(_('Validating model...'), 0)
        errList = self.Validate()
        if statusbar:
            statusbar.SetStatusText('', 0)
        if errList:
            dlg = wx.MessageDialog(
                parent=parent,
                message=_(
                    'Model is not valid. Do you want to '
                    'run the model anyway?\n\n%s') %
                '\n'.join(errList),
                caption=_("Run model?"),
                style=wx.YES_NO | wx.NO_DEFAULT | wx.ICON_QUESTION | wx.CENTRE)
            ret = dlg.ShowModal()
            dlg.Destroy()
            if ret != wx.ID_YES:
                return

        # parametrization
        params = self.Parameterize()
        delInterData = False
        if params:
            dlg = ModelParamDialog(parent=parent,
                                   model=self,
                                   params=params)
            dlg.CenterOnParent()

            ret = dlg.ShowModal()
            if ret != wx.ID_OK:
                dlg.Destroy()
                return

            err = dlg.GetErrors()
            delInterData = dlg.DeleteIntermediateData()
            dlg.Destroy()
            if err:
                GError(parent=parent, message=unicode('\n'.join(err)))
                return

            err = list()
            for key, item in six.iteritems(params):
                for p in item['params']:
                    if p.get('value', '') == '':
                        err.append(
                            (key, p.get(
                                'name', ''), p.get(
                                'description', '')))
            if err:
                GError(
                    parent=parent,
                    message=_("Variables below not defined:") +
                    "\n\n" +
                    unicode(
                        '\n'.join(
                            map(
                                lambda x: "%s: %s (%s)" %
                                (x[0],
                                 x[1],
                                    x[2]),
                                err))))
                return

        log.cmdThread.SetId(-1)
        for item in self.GetItems():
            if not item.IsEnabled():
                continue
            if isinstance(item, ModelAction):
                if item.GetBlockId():
                    continue
                self.RunAction(item, params, log)
            elif isinstance(item, ModelLoop):
                cond = item.GetLabel()

                # substitute variables in condition
                variables = self.GetVariables()
                for variable in variables:
                    pattern = re.compile('%' + variable)
                    if pattern.search(cond):
                        value = ''
                        if params and 'variables' in params:
                            for p in params['variables']['params']:
                                if variable == p.get('name', ''):
                                    value = p.get('value', '')
                                    break

                        if not value:
                            value = variables[variable].get('value', '')

                        if not value:
                            continue

                        vtype = variables[variable].get('type', 'string')
                        if vtype == 'string':
                            value = '"' + value + '"'
                        cond = pattern.sub(value, cond)

                # split condition
                # TODO: this part needs some better solution
                condVar, condText = map(
                    lambda x: x.strip(),
                    re.split('\s* in \s*', cond))
                pattern = re.compile('%' + condVar)
                # for vars()[condVar] in eval(condText): ?
                vlist = list()
                if condText[0] == '`' and condText[-1] == '`':
                    # run command
                    cmd, dcmd = gtask.cmdlist_to_tuple(
                        condText[1: -1].split(' '))
                    ret = RunCommand(cmd,
                                     read=True,
                                     **dcmd)
                    if ret:
                        vlist = ret.splitlines()
                else:
                    vlist = eval(condText)

                if 'variables' not in params:
                    params['variables'] = {'params': []}
                varDict = {'name': condVar, 'value': ''}
                params['variables']['params'].append(varDict)

                for var in vlist:
                    for action in item.GetItems(self.GetItems()):
                        if not action.IsEnabled():
                            continue

                        varDict['value'] = var

                        self.RunAction(item=action, params=params,
                                       log=log)
                params['variables']['params'].remove(varDict)

        if delInterData:
            self.DeleteIntermediateData(log)

        # discard values
        if params:
            for item in six.itervalues(params):
                for p in item['params']:
                    p['value'] = ''

    def DeleteIntermediateData(self, log):
        """Detele intermediate data"""
        rast, vect, rast3d, msg = self.GetIntermediateData()

        if rast:
            log.RunCmd(['g.remove', '-f', 'type=raster',
                        'name=%s' % ','.join(rast)])
        if rast3d:
            log.RunCmd(['g.remove', '-f', 'type=raster_3d',
                        'name=%s' % ','.join(rast3d)])
        if vect:
            log.RunCmd(['g.remove', '-f', 'type=vector',
                        'name=%s' % ','.join(vect)])

    def GetIntermediateData(self):
        """Get info about intermediate data"""
        rast = list()
        rast3d = list()
        vect = list()
        for data in self.GetData():
            if not data.IsIntermediate():
                continue
            name = data.GetValue()
            prompt = data.GetPrompt()
            if prompt == 'raster':
                rast.append(name)
            elif prompt == 'vector':
                vect.append(name)
            elif prompt == 'raster_3d':
                rast3d.append(name)

        msg = ''
        if rast:
            msg += '\n\n%s: ' % _('Raster maps')
            msg += ', '.join(rast)
        if rast3d:
            msg += '\n\n%s: ' % _('3D raster maps')
            msg += ', '.join(rast3d)
        if vect:
            msg += '\n\n%s: ' % _('Vector maps')
            msg += ', '.join(vect)

        return rast, vect, rast3d, msg

    def Update(self):
        """Update model"""
        for item in self.items:
            item.Update()

    def IsParameterized(self):
        """Return True if model is parameterized"""
        if self.Parameterize():
            return True

        return False

    def Parameterize(self):
        """Return parameterized options"""
        result = dict()
        idx = 0
        if self.variables:
            params = list()
            result["variables"] = {'flags': list(),
                                   'params': params,
                                   'idx': idx}
            for name, values in six.iteritems(self.variables):
                gtype = values.get('type', 'string')
                if gtype in ('raster', 'vector', 'mapset',
                             'file', 'region', 'dir'):
                    gisprompt = True
                    prompt = gtype
                    if gtype == 'raster':
                        element = 'cell'
                    else:
                        element = gtype
                    ptype = 'string'
                else:
                    gisprompt = False
                    prompt = None
                    element = None
                    ptype = gtype
                params.append({'gisprompt': gisprompt,
                               'multiple': False,
                               'description': values.get('description', ''),
                               'guidependency': '',
                               'default': '',
                               'age': None,
                               'required': True,
                               'value': values.get('value', ''),
                               'label': '',
                               'guisection': '',
                               'key_desc': '',
                               'values': list(),
                               'parameterized': False,
                               'values_desc': list(),
                               'prompt': prompt,
                               'element': element,
                               'type': ptype,
                               'name': name})

            idx += 1

        for action in self.GetItems(objType=ModelAction):
            if not action.IsEnabled():
                continue
            name = '({0}) {1}'.format(action.GetId(), action.GetLabel())
            params = action.GetParams()
            increment = False
            for f in params['flags']:
                if f.get('parameterized', False):
                    if name not in result:
                        increment = True
                        result[name] = {'flags': list(),
                                        'params': list(),
                                        'idx': idx}
                    result[name]['flags'].append(f)
            for p in params['params']:
                if p.get('parameterized', False):
                    if name not in result:
                        increment = True
                        result[name] = {'flags': list(),
                                        'params': list(),
                                        'idx': idx}
                    result[name]['params'].append(p)
            if increment:
                idx += 1

        self.variablesParams = result  # record parameters

        return result


class ModelObject(object):

    def __init__(self, id=-1, label=''):
        self.id = id     # internal id, should be not changed
        self.label = ''
        self.rels = list()  # list of ModelRelations

        self.isEnabled = True
        self.inBlock = list()  # list of related loops/conditions

    def __del__(self):
        pass

    def GetLabel(self):
        """Get label"""
        return self.label

    def SetLabel(self, label=''):
        """Set label"""
        self.label = label

    def GetId(self):
        """Get id"""
        return self.id

    def SetId(self, newId):
        """Set id"""
        if self.inBlock:
            for loop in self.inBlock:
                # update block item
                loop.UpdateItem(self.id, newId)

        self.id = newId

    def AddRelation(self, rel):
        """Record new relation
        """
        self.rels.append(rel)

    def GetRelations(self, fdir=None):
        """Get list of relations

        :param bool fdir: True for 'from'
        """
        if fdir is None:
            return self.rels

        result = list()
        for rel in self.rels:
            if fdir == 'from':
                if rel.GetFrom() == self:
                    result.append(rel)
            else:
                if rel.GetTo() == self:
                    result.append(rel)

        return result

    def IsEnabled(self):
        """Get True if action is enabled, otherwise False"""
        return self.isEnabled

    def Enable(self, enabled=True):
        """Enable/disable action"""
        self.isEnabled = enabled
        self.Update()

    def Update(self):
        pass

    def SetBlock(self, item):
        """Add object to the block (loop/condition)

        :param item: reference to ModelLoop or ModelCondition which
                     defines loops/condition
        """
        if item not in self.inBlock:
            self.inBlock.append(item)

    def UnSetBlock(self, item):
        """Remove object from the block (loop/consition)

        :param item: reference to ModelLoop or ModelCondition which
                     defines loops/codition
        """
        if item in self.inBlock:
            self.inBlock.remove(item)

    def GetBlock(self):
        """Get list of related ModelObject(s) which defines block
        (loop/condition)

        :return: list of ModelObjects
        """
        return self.inBlock

    def GetBlockId(self):
        """Get list of related ids which defines block

        :return: list of ids
        """
        ret = list()
        for mo in self.inBlock:
            ret.append(mo.GetId())

        return ret


class ModelAction(ModelObject, ogl.DividedShape):
    """Action class (GRASS module)"""

    def __init__(self, parent, x, y, id=-1, cmd=None, task=None,
                 width=None, height=None, label=None, comment=''):
        ModelObject.__init__(self, id, label)

        self.parent = parent
        self.task = task
        self.comment = comment

        if not width:
            width = UserSettings.Get(
                group='modeler', key='action', subkey=(
                    'size', 'width'))
        if not height:
            height = UserSettings.Get(
                group='modeler', key='action', subkey=(
                    'size', 'height'))

        if cmd:
            self.task = GUI(show=None).ParseCommand(cmd=cmd)
        else:
            if task:
                self.task = task
            else:
                self.task = None

        self.propWin = None

        self.data = list()   # list of connected data items

        self.isValid = False
        self.isParameterized = False

        if self.parent.GetCanvas():
            ogl.DividedShape.__init__(self, width, height)

            self.regionLabel = ogl.ShapeRegion()
            self.regionLabel.SetFormatMode(
                ogl.FORMAT_CENTRE_HORIZ | ogl.FORMAT_CENTRE_VERT)
            self.AddRegion(self.regionLabel)

            self.regionComment = None

            self.SetCanvas(self.parent)
            self.SetX(x)
            self.SetY(y)
            self._setPen()
            self._setBrush()
            self.SetLabel(label)
            if comment:
                self.SetComment(comment)

            self.SetRegionSizes()
            self.ReformatRegions()

        if self.task:
            self.SetValid(self.task.get_options())

    def _setBrush(self, running=False):
        """Set brush"""
        if running:
            color = UserSettings.Get(group='modeler', key='action',
                                     subkey=('color', 'running'))
        elif not self.isEnabled:
            color = UserSettings.Get(group='modeler', key='disabled',
                                     subkey='color')
        elif self.isValid:
            color = UserSettings.Get(group='modeler', key='action',
                                     subkey=('color', 'valid'))
        else:
            color = UserSettings.Get(group='modeler', key='action',
                                     subkey=('color', 'invalid'))

        wxColor = wx.Colour(color[0], color[1], color[2])
        self.SetBrush(wx.Brush(wxColor))

    def _setPen(self):
        """Set pen"""
        if self.isParameterized:
            width = int(UserSettings.Get(group='modeler', key='action',
                                         subkey=('width', 'parameterized')))
        else:
            width = int(UserSettings.Get(group='modeler', key='action',
                                         subkey=('width', 'default')))
        if self.isEnabled:
            style = wx.SOLID
        else:
            style = wx.DOT

        pen = wx.Pen(wx.BLACK, width, style)
        self.SetPen(pen)

    def ReformatRegions(self):
        rnum = 0
        canvas = self.parent.GetCanvas()

        dc = wx.ClientDC(canvas)  # used for measuring

        for region in self.GetRegions():
            text = region.GetText()
            self.FormatText(dc, text, rnum)
            rnum += 1

    def OnSizingEndDragLeft(self, pt, x, y, keys, attch):
        ogl.DividedShape.OnSizingEndDragLeft(self, pt, x, y, keys, attch)
        self.SetRegionSizes()
        self.ReformatRegions()
        self.GetCanvas().Refresh()

    def SetLabel(self, label=None):
        """Set label

        :param label: if None use command string instead
        """
        if label:
            self.label = label
        elif self.label:
            label = self.label
        else:
            try:
                label = self.task.get_cmd(ignoreErrors=True)[0]
            except:
                label = _("unknown")

        idx = self.GetId()
        self.regionLabel.SetText('(%d) %s' % (idx, label))
        self.SetRegionSizes()
        self.ReformatRegions()

    def SetComment(self, comment):
        """Set comment"""
        self.comment = comment

        if self.regionComment is None:
            self.regionComment = ogl.ShapeRegion()
            self.regionComment.SetFormatMode(ogl.FORMAT_CENTRE_HORIZ)
            font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
            font.SetStyle(wx.ITALIC)
            self.regionComment.SetFont(font)

        # clear doesn't work
        # self.regionComment.ClearText()
        self.regionComment.SetText(comment)

        self.ClearRegions()
        self.AddRegion(self.regionLabel)
        self.regionLabel.SetProportions(0.0, 1.0)

        if self.comment:
            self.AddRegion(self.regionComment)
            self.regionLabel.SetProportions(0.0, 0.4)

        self.SetRegionSizes()
        self.ReformatRegions()

    def GetComment(self):
        """Get comment"""
        return self.comment

    def SetProperties(self, params, propwin):
        """Record properties dialog"""
        self.task.params = params['params']
        self.task.flags = params['flags']
        self.propWin = propwin

    def GetPropDialog(self):
        """Get properties dialog"""
        return self.propWin

    def GetLog(self, string=True, substitute=None):
        """Get logging info

        :param string: True to get cmd as a string otherwise a list
        :param substitute: dictionary of parameter to substitute or None
        """
        cmd = self.task.get_cmd(ignoreErrors=True, ignoreRequired=True,
                                ignoreDefault=False)

        # substitute variables
        if substitute:
            variables = []
            if 'variables' in substitute:
                for p in substitute['variables']['params']:
                    variables.append(p.get('name', ''))
            else:
                variables = self.parent.GetVariables()

            # order variables by length
            for variable in sorted(variables, key=len, reverse=True):
                pattern = re.compile('%' + variable)
                value = ''
                if substitute and 'variables' in substitute:
                    for p in substitute['variables']['params']:
                        if variable == p.get('name', ''):
                            if p.get('type', 'string') == 'string':
                                value = p.get('value', '')
                            else:
                                value = str(p.get('value', ''))
                            break

                if not value:
                    value = variables[variable].get('value', '')

                if not value:
                    continue

                for idx in range(len(cmd)):
                    if pattern.search(cmd[idx]):
                        cmd[idx] = pattern.sub(value, cmd[idx])
                    idx += 1

        if string:
            if cmd is None:
                return ''
            else:
                return ' '.join(cmd)

        return cmd

    def GetLabel(self):
        """Get name"""
        if self.label:
            return self.label

        cmd = self.task.get_cmd(ignoreErrors=True)
        if cmd and len(cmd) > 0:
            return cmd[0]

        return _('unknown')

    def GetParams(self, dcopy=False):
        """Get dictionary of parameters"""
        if dcopy:
            return copy.deepcopy(self.task.get_options())

        return self.task.get_options()

    def GetTask(self):
        """Get grassTask instance"""
        return self.task

    def SetParams(self, params):
        """Set dictionary of parameters"""
        self.task.params = params['params']
        self.task.flags = params['flags']

    def MergeParams(self, params):
        """Merge dictionary of parameters"""
        if 'flags' in params:
            for f in params['flags']:
                self.task.set_flag(f['name'],
                                   f.get('value', False))
        if 'params' in params:
            for p in params['params']:
                self.task.set_param(p['name'],
                                    p.get('value', ''))

    def SetValid(self, options):
        """Set validity for action

        :param options: dictionary with flags and params (gtask)
        """
        self.isValid = True

        for f in options['flags']:
            if f.get('parameterized', False):
                self.isParameterized = True
                break

        for p in options['params']:
            if self.isValid and p.get('required', False) and \
               p.get('value', '') == '' and \
               p.get('default', '') == '':
                self.isValid = False
            if not self.isParameterized and p.get('parameterized', False):
                self.isParameterized = True

        if self.parent.GetCanvas():
            self._setBrush()
            self._setPen()

    def IsValid(self):
        """Check validity (all required parameters set)"""
        return self.isValid

    def IsParameterized(self):
        """Check if action is parameterized"""
        return self.isParameterized

    def GetParameterizedParams(self):
        """Return parameterized flags and options"""
        param = {'flags': [], 'params': []}

        options = self.GetParams()

        for f in options['flags']:
            if f.get('parameterized', False):
                param['flags'].append(f)

        for p in options['params']:
            if p.get('parameterized', False):
                param['params'].append(p)

        return param

    def FindData(self, name):
        """Find data item by name"""
        for rel in self.GetRelations():
            data = rel.GetData()
            if name == rel.GetLabel() and name in data.GetLabel():
                return data

        return None

    def Update(self, running=False):
        """Update action"""
        if running:
            self._setBrush(running=True)
        else:
            self._setBrush()
        self._setPen()

    def OnDraw(self, dc):
        """Draw action in canvas"""
        self._setBrush()
        self._setPen()
        ogl.RectangleShape.Recentre(self, dc)  # re-center text
        ogl.RectangleShape.OnDraw(self, dc)


class ModelData(ModelObject, ogl.EllipseShape):

    def __init__(self, parent, x, y, value='',
                 prompt='', width=None, height=None):
        """Data item class

        :param parent: window parent
        :param x, y: position of the shape
        :param fname, tname: list of parameter names from / to
        :param value: value
        :param prompt: type of GIS element
        :param width, height: dimension of the shape
        """
        ModelObject.__init__(self)

        self.parent = parent
        self.value = value
        self.prompt = prompt
        self.intermediate = False
        self.display = False
        self.propWin = None
        if not width:
            width = UserSettings.Get(
                group='modeler', key='data', subkey=(
                    'size', 'width'))
        if not height:
            height = UserSettings.Get(
                group='modeler', key='data', subkey=(
                    'size', 'height'))

        if self.parent.GetCanvas():
            ogl.EllipseShape.__init__(self, width, height)

            self.SetCanvas(self.parent)
            self.SetX(x)
            self.SetY(y)
            self._setPen()
            self._setBrush()
            self.SetLabel()

    def IsIntermediate(self):
        """Checks if data item is intermediate"""
        return self.intermediate

    def SetIntermediate(self, im):
        """Set intermediate flag"""
        self.intermediate = im

    def HasDisplay(self):
        """Checks if data item is marked to be displayed"""
        return self.display

    def SetHasDisplay(self, tbd):
        """Set to-be-displayed flag"""
        self.display = tbd

    def OnDraw(self, dc):
        self._setPen()

        ogl.EllipseShape.OnDraw(self, dc)

    def GetLog(self, string=True):
        """Get logging info"""
        name = list()
        for rel in self.GetRelations():
            name.append(rel.GetLabel())
        if name:
            return '/'.join(name) + '=' + self.value + ' (' + self.prompt + ')'
        else:
            return self.value + ' (' + self.prompt + ')'

    def GetLabel(self):
        """Get list of names"""
        name = list()
        for rel in self.GetRelations():
            name.append(rel.GetLabel())

        return name

    def GetPrompt(self):
        """Get prompt"""
        return self.prompt

    def SetPrompt(self, prompt):
        """Set prompt

        :param prompt:
        """
        self.prompt = prompt

    def GetValue(self):
        """Get value"""
        return self.value

    def SetValue(self, value):
        """Set value

        :param value:
        """
        self.value = value
        self.SetLabel()
        for direction in ('from', 'to'):
            for rel in self.GetRelations(direction):
                if direction == 'from':
                    action = rel.GetTo()
                else:
                    action = rel.GetFrom()

                task = GUI(
                    show=None).ParseCommand(
                    cmd=action.GetLog(
                        string=False))
                task.set_param(rel.GetLabel(), self.value)
                action.MergeParams(task.get_options())

    def GetPropDialog(self):
        """Get properties dialog"""
        return self.propWin

    def SetPropDialog(self, win):
        """Get properties dialog"""
        self.propWin = win

    def _setBrush(self):
        """Set brush"""
        if self.prompt == 'raster':
            color = UserSettings.Get(group='modeler', key='data',
                                     subkey=('color', 'raster'))
        elif self.prompt == 'raster_3d':
            color = UserSettings.Get(group='modeler', key='data',
                                     subkey=('color', 'raster3d'))
        elif self.prompt == 'vector':
            color = UserSettings.Get(group='modeler', key='data',
                                     subkey=('color', 'vector'))
        elif self.prompt == 'dbtable':
            color = UserSettings.Get(group='modeler', key='data',
                                     subkey=('color', 'dbtable'))
        else:
            color = UserSettings.Get(group='modeler', key='action',
                                     subkey=('color', 'invalid'))
        wxColor = wx.Colour(color[0], color[1], color[2])
        self.SetBrush(wx.Brush(wxColor))

    def _setPen(self):
        """Set pen"""
        isParameterized = False
        for rel in self.GetRelations('from'):
            if rel.GetTo().IsParameterized():
                isParameterized = True
                break
        if not isParameterized:
            for rel in self.GetRelations('to'):
                if rel.GetFrom().IsParameterized():
                    isParameterized = True
                    break

        if isParameterized:
            width = int(UserSettings.Get(group='modeler', key='action',
                                         subkey=('width', 'parameterized')))
        else:
            width = int(UserSettings.Get(group='modeler', key='action',
                                         subkey=('width', 'default')))
        if self.intermediate:
            style = wx.DOT
        else:
            style = wx.SOLID

        pen = wx.Pen(wx.BLACK, width, style)
        self.SetPen(pen)

    def SetLabel(self):
        """Update text"""
        self.ClearText()
        name = []
        for rel in self.GetRelations():
            name.append(rel.GetLabel())
        self.AddText('/'.join(name))
        if self.value:
            self.AddText(self.value)
        else:
            self.AddText(_('<not defined>'))

    def Update(self):
        """Update action"""
        self._setBrush()
        self._setPen()
        self.SetLabel()

    def GetDisplayCmd(self):
        """Get display command as list"""
        cmd = []
        if self.prompt == 'raster':
            cmd.append('d.rast')
        elif self.prompt == 'vector':
            cmd.append('d.vect')
        else:
            raise GException("Unsupported display prompt: {}".format(
                self.prompt))

        cmd.append('map=' + self.value)

        return cmd

class ModelRelation(ogl.LineShape):
    """Data - action relation"""

    def __init__(self, parent, fromShape, toShape, param=''):
        self.fromShape = fromShape
        self.toShape = toShape
        self.param = param
        self.parent = parent

        self._points = None

        if self.parent.GetCanvas():
            ogl.LineShape.__init__(self)

    def __del__(self):
        if self in self.fromShape.rels:
            self.fromShape.rels.remove(self)
        if self in self.toShape.rels:
            self.toShape.rels.remove(self)

    def GetFrom(self):
        """Get id of 'from' shape"""
        return self.fromShape

    def GetTo(self):
        """Get id of 'to' shape"""
        return self.toShape

    def GetData(self):
        """Get related ModelData instance

        :return: ModelData instance
        :return: None if not found
        """
        if isinstance(self.fromShape, ModelData):
            return self.fromShape
        elif isinstance(self.toShape, ModelData):
            return self.toShape

        return None

    def GetLabel(self):
        """Get parameter name"""
        return self.param

    def ResetShapes(self):
        """Reset related objects"""
        self.fromShape.ResetControlPoints()
        self.toShape.ResetControlPoints()
        self.ResetControlPoints()

    def SetControlPoints(self, points):
        """Set control points"""
        self._points = points

    def GetControlPoints(self):
        """Get list of control points"""
        return self._points

    def _setPen(self):
        """Set pen"""
        pen = wx.Pen(wx.BLACK, 1, wx.SOLID)
        self.SetPen(pen)

    def OnDraw(self, dc):
        """Draw relation"""
        self._setPen()
        ogl.LineShape.OnDraw(self, dc)

    def SetName(self, param):
        self.param = param


class ModelItem(ModelObject):

    def __init__(self, parent, x, y, id=-1, width=None,
                 height=None, label='', items=[]):
        """Abstract class for loops and conditions"""
        ModelObject.__init__(self, id, label)
        self.parent = parent

    def _setPen(self):
        """Set pen"""
        if self.isEnabled:
            style = wx.SOLID
        else:
            style = wx.DOT

        pen = wx.Pen(wx.BLACK, 1, style)
        self.SetPen(pen)

    def SetId(self, id):
        """Set loop id"""
        self.id = id

    def SetLabel(self, label=''):
        """Set loop text (condition)"""
        if label:
            self.label = label
        self.ClearText()
        self.AddText('(' + str(self.id) + ') ' + self.label)

    def GetLog(self):
        """Get log info"""
        if self.label:
            return _("Condition: ") + self.label
        else:
            return _("Condition: not defined")

    def AddRelation(self, rel):
        """Record relation"""
        self.rels.append(rel)

    def Clear(self):
        """Clear object, remove rels"""
        self.rels = list()


class ModelLoop(ModelItem, ogl.RectangleShape):

    def __init__(self, parent, x, y, id=-1, idx=-1,
                 width=None, height=None, label='', items=[]):
        """Defines a loop"""
        ModelItem.__init__(self, parent, x, y, id, width, height, label, items)
        self.itemIds = list()  # unordered

        if not width:
            width = UserSettings.Get(
                group='modeler', key='loop', subkey=(
                    'size', 'width'))
        if not height:
            height = UserSettings.Get(
                group='modeler', key='loop', subkey=(
                    'size', 'height'))

        if self.parent.GetCanvas():
            ogl.RectangleShape.__init__(self, width, height)

            self.SetCanvas(self.parent)
            self.SetX(x)
            self.SetY(y)
            self._setPen()
            self._setBrush()
            self.SetCornerRadius(100)
            self.SetLabel(label)

    def _setBrush(self):
        """Set brush"""
        if not self.isEnabled:
            color = UserSettings.Get(group='modeler', key='disabled',
                                     subkey='color')
        else:
            color = UserSettings.Get(group='modeler', key='loop',
                                     subkey=('color', 'valid'))

        wxColor = wx.Colour(color[0], color[1], color[2])
        self.SetBrush(wx.Brush(wxColor))

    def Enable(self, enabled=True):
        """Enable/disable action"""
        for idx in self.itemIds:
            item = self.parent.FindAction(idx)
            if item:
                item.Enable(enabled)

        ModelObject.Enable(self, enabled)
        self.Update()

    def Update(self):
        self._setPen()
        self._setBrush()

    def GetItems(self, items):
        """Get sorted items by id"""
        result = list()
        for item in items:
            if item.GetId() in self.itemIds:
                result.append(item)

        return result

    def SetItems(self, items):
        """Set items (id)"""
        self.itemIds = items

    def UpdateItem(self, oldId, newId):
        """Update item in the list"""
        idx = self.itemIds.index(oldId)
        if idx != -1:
            self.itemIds[idx] = newId

    def OnDraw(self, dc):
        """Draw loop in canvas"""
        self._setBrush()
        ogl.RectangleShape.Recentre(self, dc)  # re-center text
        ogl.RectangleShape.OnDraw(self, dc)


class ModelCondition(ModelItem, ogl.PolygonShape):

    def __init__(self, parent, x, y, id=-1, width=None, height=None, label='',
                 items={'if': [], 'else': []}):
        """Defines a if-else condition"""
        ModelItem.__init__(self, parent, x, y, id, width, height, label, items)
        self.itemIds = {'if': [], 'else': []}

        if not width:
            self.width = UserSettings.Get(
                group='modeler',
                key='if-else',
                subkey=(
                    'size',
                    'width'))
        else:
            self.width = width
        if not height:
            self.height = UserSettings.Get(
                group='modeler',
                key='if-else',
                subkey=(
                    'size',
                    'height'))
        else:
            self.height = height

        if self.parent.GetCanvas():
            ogl.PolygonShape.__init__(self)

            points = [(0, - self.height / 2),
                      (self.width / 2, 0),
                      (0, self.height / 2),
                      (- self.width / 2, 0)]
            self.Create(points)

            self.SetCanvas(self.parent)
            self.SetX(x)
            self.SetY(y)
            self.SetPen(wx.BLACK_PEN)
            if label:
                self.AddText('(' + str(self.id) + ') ' + label)
            else:
                self.AddText('(' + str(self.id) + ')')

    def GetLabel(self):
        """Get name"""
        return _("if-else")

    def GetWidth(self):
        """Get object width"""
        return self.width

    def GetHeight(self):
        """Get object height"""
        return self.height

    def GetItems(self, items):
        """Get sorted items by id"""
        result = {'if': [], 'else': []}
        for item in items:
            if item.GetId() in self.itemIds['if']:
                result['if'].append(item)
            elif item.GetId() in self.itemIds['else']:
                result['else'].append(item)

        return result

    def SetItems(self, items, branch='if'):
        """Set items (id)

        :param items: list of items
        :param branch: 'if' / 'else'
        """
        if branch in ['if', 'else']:
            self.itemIds[branch] = items


class ModelComment(ModelObject, ogl.RectangleShape):

    def __init__(self, parent, x, y, id=-1, width=None, height=None, label=''):
        """Defines a model comment"""
        ModelObject.__init__(self, id, label)

        if not width:
            width = UserSettings.Get(
                group='modeler', key='comment', subkey=(
                    'size', 'width'))
        if not height:
            height = UserSettings.Get(
                group='modeler', key='comment', subkey=(
                    'size', 'height'))

        if parent.GetCanvas():
            ogl.RectangleShape.__init__(self, width, height)
            self.SetCanvas(parent)
            self.SetX(x)
            self.SetY(y)
            font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
            font.SetStyle(wx.ITALIC)
            self.SetFont(font)
            self._setPen()
            self._setBrush()
            self.SetLabel(label)

    def _setBrush(self, running=False):
        """Set brush"""
        color = UserSettings.Get(group='modeler', key='comment',
                                 subkey='color')
        wxColor = wx.Colour(color[0], color[1], color[2])
        self.SetBrush(wx.Brush(wxColor))

    def _setPen(self):
        """Set pen"""
        pen = wx.Pen(wx.BLACK, 1, wx.DOT)
        self.SetPen(pen)

    def SetLabel(self, label=None):
        """Set label

        :param label: if None use command string instead
        """
        if label:
            self.label = label
        elif self.label:
            label = self.label
        else:
            label = ''
        idx = self.GetId()

        self.ClearText()
        self.AddText('(%d) %s' % (idx, label))

    def GetComment(self):
        return self.GetLabel()

    def SetComment(self, comment):
        self.SetLabel(comment)
        self.GetCanvas().Refresh()


class ProcessModelFile:
    """Process GRASS model file (gxm)"""

    def __init__(self, tree):
        """A ElementTree handler for the GXM XML file, as defined in
        grass-gxm.dtd.
        """
        self.tree = tree
        self.root = self.tree.getroot()
        # check if input is a valid GXM file
        if self.root is None or self.root.tag != 'gxm':
            if self.root is not None:
                tagName = self.root.tag
            else:
                tabName = _("empty")
            raise GException(
                _("Details: unsupported tag name '{0}'.").format(tagName))

        # list of actions, data
        self.properties = dict()
        self.variables = dict()
        self.actions = list()
        self.data = list()
        self.loops = list()
        self.conditions = list()
        self.comments = list()

        self._processWindow()
        self._processProperties()
        self._processVariables()
        self._processItems()
        self._processData()

    def _filterValue(self, value):
        """Filter value

        :param value:
        """
        value = value.replace('&lt;', '<')
        value = value.replace('&gt;', '>')

        return value

    def _getNodeText(self, node, tag, default=''):
        """Get node text"""
        p = node.find(tag)
        if p is not None:
            if p.text:
                return utils.normalize_whitespace(p.text)
            else:
                return ''

        return default

    def _processWindow(self):
        """Process window properties"""
        node = self.root.find('window')
        if node is None:
            self.pos = self.size = None
            return

        self.pos, self.size = self._getDim(node)

    def _processProperties(self):
        """Process model properties"""
        node = self.root.find('properties')
        if node is None:
            return
        for key in ('name', 'description', 'author'):
            self._processProperty(node, key)

        for f in node.findall('flag'):
            name = f.get('name', '')
            if name == 'overwrite':
                self.properties['overwrite'] = True

    def _processProperty(self, pnode, name):
        """Process given property"""
        node = pnode.find(name)
        if node is not None:
            self.properties[name] = node.text
        else:
            self.properties[name] = ''

    def _processVariables(self):
        """Process model variables"""
        vnode = self.root.find('variables')
        if vnode is None:
            return
        for node in vnode.findall('variable'):
            name = node.get('name', '')
            if not name:
                continue  # should not happen
            self.variables[name] = {'type': node.get('type', 'string')}
            for key in ('description', 'value'):
                self._processVariable(node, name, key)

    def _processVariable(self, pnode, name, key):
        """Process given variable"""
        node = pnode.find(key)
        if node is not None:
            if node.text:
                self.variables[name][key] = node.text

    def _processItems(self):
        """Process model items (actions, loops, conditions)"""
        self._processActions()
        self._processLoops()
        self._processConditions()
        self._processComments()

    def _processActions(self):
        """Process model file"""
        for action in self.root.findall('action'):
            pos, size = self._getDim(action)
            disabled = False

            task = action.find('task')
            if task is not None:
                if task.find('disabled') is not None:
                    disabled = True
                task = self._processTask(task)
            else:
                task = None

            aId = int(action.get('id', -1))
            label = action.get('name')
            comment = action.find('comment')
            if comment is not None:
                commentString = comment.text
            else:
                commentString = ''

            self.actions.append({'pos': pos,
                                 'size': size,
                                 'task': task,
                                 'id': aId,
                                 'disabled': disabled,
                                 'label': label,
                                 'comment': commentString})

    def _getDim(self, node):
        """Get position and size of shape"""
        pos = size = None
        posAttr = node.get('pos', None)
        if posAttr:
            posVal = list(map(int, posAttr.split(',')))
            try:
                pos = (posVal[0], posVal[1])
            except:
                pos = None

        sizeAttr = node.get('size', None)
        if sizeAttr:
            sizeVal = list(map(int, sizeAttr.split(',')))
            try:
                size = (sizeVal[0], sizeVal[1])
            except:
                size = None

        return pos, size

    def _processData(self):
        """Process model file"""
        for data in self.root.findall('data'):
            pos, size = self._getDim(data)
            param = data.find('data-parameter')
            prompt = value = None
            if param is not None:
                prompt = param.get('prompt', None)
                value = self._filterValue(self._getNodeText(param, 'value'))

            intermediate = False if data.find('intermediate') is None else True

            display = False if data.find('display') is None else True
            
            rels = list()
            for rel in data.findall('relation'):
                defrel = {'id': int(rel.get('id', -1)),
                          'dir': rel.get('dir', 'to'),
                          'name': rel.get('name', '')}
                points = list()
                for point in rel.findall('point'):
                    x = self._filterValue(self._getNodeText(point, 'x'))
                    y = self._filterValue(self._getNodeText(point, 'y'))
                    points.append((float(x), float(y)))
                defrel['points'] = points
                rels.append(defrel)

            self.data.append({'pos': pos,
                              'size': size,
                              'prompt': prompt,
                              'value': value,
                              'intermediate': intermediate,
                              'display': display,
                              'rels': rels})

    def _processTask(self, node):
        """Process task

        :return: grassTask instance
        :return: None on error
        """
        cmd = list()
        parameterized = list()

        name = node.get('name', None)
        if not name:
            return None

        cmd.append(name)

        # flags
        for f in node.findall('flag'):
            flag = f.get('name', '')
            if f.get('parameterized', '0') == '1':
                parameterized.append(('flag', flag))
                if f.get('value', '1') == '0':
                    continue
            if len(flag) > 1:
                cmd.append('--' + flag)
            else:
                cmd.append('-' + flag)
        # parameters
        for p in node.findall('parameter'):
            name = p.get('name', '')
            if p.find('parameterized') is not None:
                parameterized.append(('param', name))
            cmd.append(
                '%s=%s' %
                (name, self._filterValue(
                    self._getNodeText(
                        p, 'value'))))

        task, err = GUI(show=None, checkError=True).ParseCommand(cmd=cmd)
        if err:
            GWarning(os.linesep.join(err))

        for opt, name in parameterized:
            if opt == 'flag':
                task.set_flag(name, True, element='parameterized')
            else:
                task.set_param(name, True, element='parameterized')

        return task

    def _processLoops(self):
        """Process model loops"""
        for node in self.root.findall('loop'):
            pos, size = self._getDim(node)
            text = self._filterValue(
                self._getNodeText(
                    node, 'condition')).strip()
            aid = list()
            for anode in node.findall('item'):
                try:
                    aid.append(int(anode.text))
                except ValueError:
                    pass

            self.loops.append({'pos': pos,
                               'size': size,
                               'text': text,
                               'id': int(node.get('id', -1)),
                               'items': aid})

    def _processConditions(self):
        """Process model conditions"""
        for node in self.root.findall('if-else'):
            pos, size = self._getDim(node)
            text = self._filterValue(
                self._getNodeText(
                    node, 'condition')).strip()
            aid = {'if': list(),
                   'else': list()}
            for b in aid.keys():
                bnode = node.find(b)
                if bnode is None:
                    continue
                for anode in bnode.findall('item'):
                    try:
                        aid[b].append(int(anode.text))
                    except ValueError:
                        pass

            self.conditions.append({'pos': pos,
                                    'size': size,
                                    'text': text,
                                    'id': int(node.get('id', -1)),
                                    'items': aid})

    def _processComments(self):
        """Process model comments"""
        for node in self.root.findall('comment'):
            pos, size = self._getDim(node)
            text = self._filterValue(node.text)

            self.comments.append({'pos': pos,
                                  'size': size,
                                  'text': text,
                                  'id': int(node.get('id', -1)),
                                  'text': text})


class WriteModelFile:
    """Generic class for writing model file"""

    def __init__(self, fd, model):
        self.fd = fd
        self.model = model
        self.properties = model.GetProperties()
        self.variables = model.GetVariables()
        self.items = model.GetItems()

        self.indent = 0

        self._header()

        self._window()
        self._properties()
        self._variables()
        self._items()

        dataList = list()
        for action in model.GetItems(objType=ModelAction):
            for rel in action.GetRelations():
                dataItem = rel.GetData()
                if dataItem not in dataList:
                    dataList.append(dataItem)
        self._data(dataList)

        self._footer()

    def _filterValue(self, value):
        """Escapes value to be stored in XML.

        :param value: string to be escaped as XML
        :return: a XML-valid string
        """
        value = saxutils.escape(value)
        return value

    def _header(self):
        """Write header"""
        self.fd.write(
            '<?xml version="1.0" encoding="%s"?>\n' %
            GetDefaultEncoding(
                forceUTF8=True))
        self.fd.write('<!DOCTYPE gxm SYSTEM "grass-gxm.dtd">\n')
        self.fd.write('%s<gxm>\n' % (' ' * self.indent))
        self.indent += 4

    def _footer(self):
        """Write footer"""
        self.indent -= 4
        self.fd.write('%s</gxm>\n' % (' ' * self.indent))

    def _window(self):
        """Write window properties"""
        canvas = self.model.GetCanvas()
        if canvas is None:
            return
        win = canvas.parent
        pos = win.GetPosition()
        size = win.GetSize()
        self.fd.write('%s<window pos="%d,%d" size="%d,%d" />\n' %
                      (' ' * self.indent, pos[0], pos[1], size[0], size[1]))

    def _properties(self):
        """Write model properties"""
        self.fd.write('%s<properties>\n' % (' ' * self.indent))
        self.indent += 4
        if self.properties['name']:
            self.fd.write(
                '%s<name>%s</name>\n' %
                (' ' *
                 self.indent,
                 self.properties['name']))
        if self.properties['description']:
            self.fd.write(
                '%s<description>%s</description>\n' %
                (' ' *
                 self.indent,
                 self.properties['description']))
        if self.properties['author']:
            self.fd.write(
                '%s<author>%s</author>\n' %
                (' ' *
                 self.indent,
                 self.properties['author']))

        if 'overwrite' in self.properties and \
                self.properties['overwrite']:
            self.fd.write(
                '%s<flag name="overwrite" />\n' %
                (' ' * self.indent))
        self.indent -= 4
        self.fd.write('%s</properties>\n' % (' ' * self.indent))

    def _variables(self):
        """Write model variables"""
        if not self.variables:
            return
        self.fd.write('%s<variables>\n' % (' ' * self.indent))
        self.indent += 4
        for name, values in six.iteritems(self.variables):
            self.fd.write(
                '%s<variable name="%s" type="%s">\n' %
                (' ' * self.indent, name, values['type']))
            self.indent += 4
            if 'value' in values:
                self.fd.write('%s<value>%s</value>\n' %
                              (' ' * self.indent, values['value']))
            if 'description' in values:
                self.fd.write(
                    '%s<description>%s</description>\n' %
                    (' ' * self.indent, values['description']))
            self.indent -= 4
            self.fd.write('%s</variable>\n' % (' ' * self.indent))
        self.indent -= 4
        self.fd.write('%s</variables>\n' % (' ' * self.indent))

    def _items(self):
        """Write actions/loops/conditions"""
        for item in self.items:
            if isinstance(item, ModelAction):
                self._action(item)
            elif isinstance(item, ModelLoop):
                self._loop(item)
            elif isinstance(item, ModelCondition):
                self._condition(item)
            elif isinstance(item, ModelComment):
                self._comment(item)

    def _action(self, action):
        """Write actions"""
        self.fd.write(
            '%s<action id="%d" name="%s" pos="%d,%d" size="%d,%d">\n' %
            (' ' * self.indent,
             action.GetId(),
             action.GetLabel(),
             action.GetX(),
             action.GetY(),
             action.GetWidth(),
             action.GetHeight()))
        self.indent += 4
        comment = action.GetComment()
        if comment:
            self.fd.write(
                '%s<comment>%s</comment>\n' %
                (' ' * self.indent, comment))
        self.fd.write('%s<task name="%s">\n' %
                      (' ' * self.indent, action.GetLog(string=False)[0]))
        self.indent += 4
        if not action.IsEnabled():
            self.fd.write('%s<disabled />\n' % (' ' * self.indent))
        for key, val in six.iteritems(action.GetParams()):
            if key == 'flags':
                for f in val:
                    if f.get('value', False) or f.get('parameterized', False):
                        if f.get('parameterized', False):
                            if f.get('value', False) == False:
                                self.fd.write(
                                    '%s<flag name="%s" value="0" parameterized="1" />\n' %
                                    (' ' *
                                     self.indent,
                                     f.get(
                                         'name',
                                         '')))
                            else:
                                self.fd.write(
                                    '%s<flag name="%s" parameterized="1" />\n' %
                                    (' ' *
                                     self.indent,
                                     f.get(
                                         'name',
                                         '')))
                        else:
                            self.fd.write(
                                '%s<flag name="%s" />\n' %
                                (' ' * self.indent, f.get('name', '')))
            else:  # parameter
                for p in val:
                    if not p.get(
                            'value', '') and not p.get(
                            'parameterized', False):
                        continue
                    self.fd.write('%s<parameter name="%s">\n' %
                                  (' ' * self.indent, p.get('name', '')))
                    self.indent += 4
                    if p.get('parameterized', False):
                        self.fd.write(
                            '%s<parameterized />\n' %
                            (' ' * self.indent))
                    self.fd.write(
                        '%s<value>%s</value>\n' %
                        (' ' *
                         self.indent,
                         self._filterValue(
                             p.get(
                                 'value',
                                 ''))))
                    self.indent -= 4
                    self.fd.write('%s</parameter>\n' % (' ' * self.indent))
        self.indent -= 4
        self.fd.write('%s</task>\n' % (' ' * self.indent))
        self.indent -= 4
        self.fd.write('%s</action>\n' % (' ' * self.indent))

    def _data(self, dataList):
        """Write data"""
        for data in dataList:
            self.fd.write('%s<data pos="%d,%d" size="%d,%d">\n' %
                          (' ' * self.indent, data.GetX(), data.GetY(),
                           data.GetWidth(), data.GetHeight()))
            self.indent += 4
            self.fd.write('%s<data-parameter prompt="%s">\n' %
                          (' ' * self.indent, data.GetPrompt()))
            self.indent += 4
            self.fd.write(
                '%s<value>%s</value>\n' %
                (' ' *
                 self.indent,
                 self._filterValue(
                     data.GetValue())))
            self.indent -= 4
            self.fd.write('%s</data-parameter>\n' % (' ' * self.indent))

            if data.IsIntermediate():
                self.fd.write('%s<intermediate />\n' % (' ' * self.indent))
            if data.HasDisplay():
                self.fd.write('%s<display />\n' % (' ' * self.indent))

            # relations
            for ft in ('from', 'to'):
                for rel in data.GetRelations(ft):
                    if ft == 'from':
                        aid = rel.GetTo().GetId()
                    else:
                        aid = rel.GetFrom().GetId()
                    self.fd.write('%s<relation dir="%s" id="%d" name="%s">\n' %
                                  (' ' * self.indent, ft, aid, rel.GetLabel()))
                    self.indent += 4
                    for point in rel.GetLineControlPoints()[1:-1]:
                        self.fd.write('%s<point>\n' % (' ' * self.indent))
                        self.indent += 4
                        x, y = point.Get()
                        self.fd.write(
                            '%s<x>%d</x>\n' %
                            (' ' * self.indent, int(x)))
                        self.fd.write(
                            '%s<y>%d</y>\n' %
                            (' ' * self.indent, int(y)))
                        self.indent -= 4
                        self.fd.write('%s</point>\n' % (' ' * self.indent))
                    self.indent -= 4
                    self.fd.write('%s</relation>\n' % (' ' * self.indent))

            self.indent -= 4
            self.fd.write('%s</data>\n' % (' ' * self.indent))

    def _loop(self, loop):
        """Write loops"""
        self.fd.write(
            '%s<loop id="%d" pos="%d,%d" size="%d,%d">\n' %
            (' ' *
             self.indent,
             loop.GetId(),
             loop.GetX(),
             loop.GetY(),
             loop.GetWidth(),
             loop.GetHeight()))
        self.indent += 4
        cond = loop.GetLabel()
        if cond:
            self.fd.write('%s<condition>%s</condition>\n' %
                          (' ' * self.indent, self._filterValue(cond)))
        for item in loop.GetItems(self.model.GetItems(objType=ModelAction)):
            self.fd.write('%s<item>%d</item>\n' %
                          (' ' * self.indent, item.GetId()))
        self.indent -= 4
        self.fd.write('%s</loop>\n' % (' ' * self.indent))

    def _condition(self, condition):
        """Write conditions"""
        bbox = condition.GetBoundingBoxMin()
        self.fd.write(
            '%s<if-else id="%d" pos="%d,%d" size="%d,%d">\n' %
            (' ' *
             self.indent,
             condition.GetId(),
             condition.GetX(),
             condition.GetY(),
             bbox[0],
                bbox[1]))
        text = condition.GetLabel()
        self.indent += 4
        if text:
            self.fd.write('%s<condition>%s</condition>\n' %
                          (' ' * self.indent, self._filterValue(text)))
        items = condition.GetItems()
        for b in items.keys():
            if len(items[b]) < 1:
                continue
            self.fd.write('%s<%s>\n' % (' ' * self.indent, b))
            self.indent += 4
            for item in items[b]:
                self.fd.write('%s<item>%d</item>\n' %
                              (' ' * self.indent, item.GetId()))
            self.indent -= 4
            self.fd.write('%s</%s>\n' % (' ' * self.indent, b))

        self.indent -= 4
        self.fd.write('%s</if-else>\n' % (' ' * self.indent))

    def _comment(self, comment):
        """Write comment"""
        self.fd.write(
            '%s<comment id="%d" pos="%d,%d" size="%d,%d">%s</comment>\n' %
            (' ' *
             self.indent,
             comment.GetId(),
             comment.GetX(),
             comment.GetY(),
             comment.GetWidth(),
             comment.GetHeight(),
             comment.GetLabel()))


class WritePythonFile:

    def __init__(self, fd, model):
        """Class for exporting model to Python script

        :param fd: file descriptor
        """
        self.fd = fd
        self.model = model
        self.indent = 4

        self._writePython()

    def _getStandardizedOption(self, string):
        if string == 'raster':
            return 'G_OPT_R_MAP'
        elif string == 'vector':
            return 'G_OPT_V_MAP'
        elif string == 'mapset':
            return 'G_OPT_M_MAPSET'
        elif string == 'file':
            return 'G_OPT_F_INPUT'
        elif string == 'dir':
            return 'G_OPT_M_DIR'
        elif string == 'region':
            return 'G_OPT_M_REGION'

        return ''

    def _writePython(self):
        """Write model to file"""
        properties = self.model.GetProperties()

        # header
        self.fd.write(
            r"""#!/usr/bin/env python3
#
#{header_begin}
#
# MODULE:       {module_name}
#
# AUTHOR(S):    {author}
#
# PURPOSE:      {purpose}
#
# DATE:         {date}
#
#{header_end}
""".format(header_begin='#' * 77,
           module_name=properties['name'],
           author=properties['author'],
           purpose='\n# '.join(properties['description'].splitlines()),
           date=time.asctime(),
           header_end='#' * 77))

        # UI
        self.fd.write(
            r"""
#%module
#% description: {description}
#%end
""".format(description=' '.join(properties['description'].splitlines())))

        modelItems = self.model.GetItems()
        for item in modelItems:
            for flag in item.GetParameterizedParams()['flags']:
                if flag['label']:
                    desc = flag['label']
                else:
                    desc = flag['description']
                self.fd.write(
                r"""#%option
#% key: {flag_name}
#% description: {description}
#% required: yes
#% type: string
#% options: True, False
#% guisection: Flags
""".format(flag_name=self._getParamName(flag['name'], item),
           description=desc))
                if flag['value']:
                    self.fd.write("#% answer: {}\n".format(flag['value']))
                else:
                    self.fd.write("#% answer: False\n")
                self.fd.write("#%end\n")

            for param in item.GetParameterizedParams()['params']:
                if param['label']:
                    desc = param['label']
                else:
                    desc = param['description']
                self.fd.write(
                r"""#%option
#% key: {param_name}
#% description: {description}
#% required: yes
""".format(param_name=self._getParamName(param['name'], item),
           description=desc))
                if param['type'] != 'float':
                    self.fd.write('#% type: {}\n'.format(param['type']))
                else:
                    self.fd.write('#% type: double\n')
                if param['key_desc']:
                    self.fd.write("#% key_desc: ")
                    self.fd.write(', '.join(param['key_desc']))
                    self.fd.write("\n")
                if param['value']:
                    self.fd.write("#% answer: {}\n".format(param['value']))
                self.fd.write("#%end\n")

        # import modules
        self.fd.write(
            r"""
import sys
import os
import atexit

from grass.script import parser, run_command
""")

        # cleanup()
        rast, vect, rast3d, msg = self.model.GetIntermediateData()
        self.fd.write(
            r"""
def cleanup():
""")
        if rast:
            self.fd.write(
                r"""  run_command('g.remove', flags='f', type='raster',
                      name=%s)
""" % ','.join(map(lambda x: "'" + x + "'", rast)))
        if vect:
            self.fd.write(
                r"""  run_command('g.remove', flags='f', type='vector',
                      name=%s)
""" % ','.join(map(lambda x: "'" + x + "'", vect)))
        if rast3d:
            self.fd.write(
                r"""  run_command('g.remove', flags='f', type='raster_3d',
                      name=%s)
""" % ','.join(map(lambda x: "'" + x + "'", rast3d)))
        if not rast and not vect and not rast3d:
            self.fd.write('    pass\n')

        self.fd.write("\ndef main(options, flags):\n")
        for item in self.model.GetItems():
            self._writePythonItem(item,
                                  variables=item.GetParameterizedParams())

        self.fd.write("    return 0\n")

        for item in modelItems:
            if item.GetParameterizedParams()['flags']:
                self.fd.write(r"""
def getParameterizedFlags(paramFlags, itemFlags):
    fl = ''
""")

                self.fd.write("""    for i in [key for key, value in paramFlags.iteritems() if value == 'True']:
        if i in itemFlags:
            fl += i[-1]

    return fl
""")
                break

        self.fd.write(
            r"""
if __name__ == "__main__":
    options, flags = parser()
    atexit.register(cleanup)
""")

        if properties.get('overwrite'):
            self.fd.write('    os.environ["GRASS_OVERWRITE"] = "1"\n')

        self.fd.write('    sys.exit(main())\n')

    def _writePythonItem(self, item, ignoreBlock=True, variables={}):
        """Write model object to Python file"""
        if isinstance(item, ModelAction):
            if ignoreBlock and item.GetBlockId():
                # ignore items in loops of conditions
                return
            self._writePythonAction(item, variables=variables)
        elif isinstance(item, ModelLoop) or isinstance(item, ModelCondition):
            # substitute condition
            cond = item.GetLabel()
            for variable in self.model.GetVariables():
                pattern = re.compile('%' + variable)
                if pattern.search(cond):
                    value = variables[variable].get('value', '')
                    if variables[variable].get('type', 'string') == 'string':
                        value = '"' + value + '"'
                    cond = pattern.sub(value, cond)
            if isinstance(item, ModelLoop):
                condVar, condText = map(
                    lambda x: x.strip(),
                    re.split('\s* in \s*', cond))
                cond = "%sfor %s in " % (' ' * self.indent, condVar)
                if condText[0] == '`' and condText[-1] == '`':
                    task = GUI(
                        show=None).ParseCommand(
                        cmd=utils.split(
                            condText[
                                1:-
                                1]))
                    cond += "grass.read_command("
                    cond += self._getPythonActionCmd(
                        task, len(cond), variables=[condVar]) + ".splitlines()"
                else:
                    cond += condText
                self.fd.write('%s:\n' % cond)
                self.indent += 4
                variablesLoop = variables.copy()
                variablesLoop[condVar] = None
                for action in item.GetItems(
                        self.model.GetItems(objType=ModelAction)):
                    self._writePythonItem(
                        action, ignoreBlock=False, variables=variablesLoop)
                self.indent -= 4
            if isinstance(item, ModelCondition):
                self.fd.write('%sif %s:\n' % (' ' * self.indent, cond))
                self.indent += 4
                condItems = item.GetItems()
                for action in condItems['if']:
                    self._writePythonItem(action, ignoreBlock=False)
                if condItems['else']:
                    self.indent -= 4
                    self.fd.write('%selse:\n' % (' ' * self.indent))
                    self.indent += 4
                    for action in condItems['else']:
                        self._writePythonItem(action, ignoreBlock=False)
                self.indent += 4
        self.fd.write('\n')
        if isinstance(item, ModelComment):
            self._writePythonComment(item)

    def _writePythonAction(self, item, variables={}):
        """Write model action to Python file"""
        task = GUI(show=None).ParseCommand(cmd=item.GetLog(string=False))
        strcmd = "%srun_command(" % (' ' * self.indent)
        self.fd.write(
            strcmd +
            self._getPythonActionCmd(
                item,
                task,
                len(strcmd),
                variables) +
            '\n')

    def _getPythonActionCmd(self, item, task, cmdIndent, variables={}):
        opts = task.get_options()

        ret = ''
        flags = ''
        params = list()
        itemParameterizedFlags = list()
        parameterizedParams = [v['name'] for v in variables['params']]
        parameterizedFlags = [v['name'] for v in variables['flags']]

        for f in opts['flags']:
            if f.get('name') in parameterizedFlags and len(f.get('name')) == 1:
                itemParameterizedFlags.append(
                    '"{}"'.format(self._getParamName(f.get('name'), item)))
            if f.get('value', False):
                name = f.get('name', '')
                if len(name) > 1:
                    params.append('%s = True' % name)
                else:
                    flags += name

        itemParameterizedFlags = ', '.join(itemParameterizedFlags)

        for p in opts['params']:
            name = p.get('name', None)
            value = p.get('value', None)

            if (name and value) or (name in parameterizedParams):
                ptype = p.get('type', 'string')
                foundVar = False

                if name in parameterizedParams:
                    foundVar = True
                    value = 'options["{}"]'.format(self._getParamName(name,
                                                                      item))

                if foundVar or ptype != 'string':
                    params.append("{}={}".format(name, value))
                else:
                    params.append('{}="{}"'.format(name, value))

        ret += '"%s"' % task.get_name()
        if flags:
            ret += ",\n{indent}flags='{fl}'".format(indent=' ' * cmdIndent,
                                                    fl=flags)
            if itemParameterizedFlags:
                ret += ' + getParameterizedFlags(options, [{}])'.format(
                    itemParameterizedFlags)
        elif itemParameterizedFlags:
            ret += ',\n{}flags=getParameterizedFlags(options, [{}])'.format(
                ' ' * cmdIndent,
                itemParameterizedFlags)

        if len(params) > 0:
            ret += ",\n"
            for opt in params[:-1]:
                ret += "%s%s,\n" % (' ' * cmdIndent, opt)
            ret += "%s%s)" % (' ' * cmdIndent, params[-1])
        else:
            ret += ")"

        return ret

    def _writePythonComment(self, item):
        """Write model comment to Python file"""
        for line in item.GetLabel().splitlines():
            self.fd.write('#' + line + '\n')

    def _substituteVariable(self, string, variable, data):
        """Substitute variable in the string

        :param string: string to be modified
        :param variable: variable to be substituted
        :param data: data related to the variable

        :return: modified string
        """
        result = ''
        ss = re.split("\w*(%" + variable + ")w*", string)

        if not ss[0] and not ss[-1]:
            if data:
                return "options['%s']" % variable
            else:
                return variable

        for s in ss:
            if not s or s == '"':
                continue

            if s == '%' + variable:
                if data:
                    result += "+options['%s']+" % variable
                else:
                    result += '+%s+' % variable
            else:
                result += '"' + s
                if not s.endswith(']'):  # options
                    result += '"'

        return result.strip('+')

    def _getParamName(self, parameter_name, item):
        return '{module_name}{module_id}_{param_name}'.format(
            module_name=re.sub('[^a-zA-Z]+', '', item.GetLabel()),
            module_id=item.GetId(),
            param_name=parameter_name)

class ModelParamDialog(wx.Dialog):

    def __init__(
            self, parent, model, params, id=wx.ID_ANY,
            title=_("Model parameters"),
            style=wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER, **kwargs):
        """Model parameters dialog
        """
        self.parent = parent
        self._model = model
        self.params = params
        self.tasks = list()  # list of tasks/pages

        wx.Dialog.__init__(
            self,
            parent=parent,
            id=id,
            title=title,
            style=style,
            **kwargs)

        self.notebook = GNotebook(parent=self,
                                  style=globalvar.FNPageDStyle)

        panel = self._createPages()
        wx.CallAfter(self.notebook.SetSelection, 0)

        # intermediate data?
        self.interData = wx.CheckBox(parent=self, label=_(
            "Delete intermediate data when finish"))
        self.interData.SetValue(True)
        rast, vect, rast3d, msg = self._model.GetIntermediateData()
        if not rast and not vect and not rast3d:
            self.interData.Hide()

        self.btnCancel = Button(parent=self, id=wx.ID_CANCEL)
        self.btnRun = Button(parent=self, id=wx.ID_OK,
                                label=_("&Run"))
        self.btnRun.SetDefault()

        self._layout()

        size = self.GetBestSize()
        self.SetMinSize(size)
        self.SetSize((size.width, size.height +
                      panel.constrained_size[1] -
                      panel.panelMinHeight))

    def _layout(self):
        btnSizer = wx.StdDialogButtonSizer()
        btnSizer.AddButton(self.btnCancel)
        btnSizer.AddButton(self.btnRun)
        btnSizer.Realize()

        mainSizer = wx.BoxSizer(wx.VERTICAL)
        mainSizer.Add(self.notebook, proportion=1,
                      flag=wx.EXPAND)
        if self.interData.IsShown():
            mainSizer.Add(self.interData, proportion=0,
                          flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)

            mainSizer.Add(wx.StaticLine(parent=self, id=wx.ID_ANY,
                                        style=wx.LI_HORIZONTAL),
                          proportion=0,
                          flag=wx.EXPAND | wx.LEFT | wx.RIGHT, border=5)

        mainSizer.Add(btnSizer, proportion=0,
                      flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)

        self.SetSizer(mainSizer)
        mainSizer.Fit(self)

    def _createPages(self):
        """Create for each parameterized module its own page"""
        nameOrdered = [''] * len(self.params.keys())
        for name, params in six.iteritems(self.params):
            nameOrdered[params['idx']] = name
        for name in nameOrdered:
            params = self.params[name]
            panel = self._createPage(name, params)
            if name == 'variables':
                name = _('Variables')
            self.notebook.AddPage(page=panel, text=name)

        return panel

    def _createPage(self, name, params):
        """Define notebook page"""
        if name in globalvar.grassCmd:
            task = gtask.grassTask(name)
        else:
            task = gtask.grassTask()
        task.flags = params['flags']
        task.params = params['params']

        panel = CmdPanel(parent=self, id=wx.ID_ANY, task=task,
                         giface=GraphicalModelerGrassInterface(self._model))
        self.tasks.append(task)

        return panel

    def GetErrors(self):
        """Check for errors, get list of messages"""
        errList = list()
        for task in self.tasks:
            errList += task.get_cmd_error()

        return errList

    def DeleteIntermediateData(self):
        """Check if to detele intermediate data"""
        if self.interData.IsShown() and self.interData.IsChecked():
            return True

        return False