"""!
@package modules.extensions

@brief GRASS Addons extensions management classes

Classes:
 - extensions::InstallExtensionWindow
 - extensions::ExtensionTreeModelBuilder
 - extensions::UninstallExtensionWindow
 - extensions::CheckListExtension

(C) 2008-2013 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 Anna Petrasova <kratochanna gmail.com>
"""

import os
import sys

import wx

from grass.script import task as gtask

from core             import globalvar
from core.gcmd        import GError, RunCommand, GException
from core.utils       import SetAddOnPath, _
from core.menutree    import TreeModel, ModuleNode
from gui_core.widgets import GListCtrl, SearchModuleWidget
from gui_core.treeview import CTreeView
from core.toolboxes   import toolboxesOutdated


class InstallExtensionWindow(wx.Frame):
    def __init__(self, parent, giface, id = wx.ID_ANY,
                 title = _("Fetch & install extension from GRASS Addons"), **kwargs):
        self.parent = parent
        self._giface = giface
        self.options = dict() # list of options
        
        wx.Frame.__init__(self, parent = parent, id = id, title = title, **kwargs)
        self.SetIcon(wx.Icon(os.path.join(globalvar.ETCICONDIR, 'grass.ico'), wx.BITMAP_TYPE_ICO))
        
        self.panel = wx.Panel(parent = self, id = wx.ID_ANY)

        self.repoBox = wx.StaticBox(parent = self.panel, id = wx.ID_ANY,
                                    label = " %s " % _("Repository"))
        self.treeBox = wx.StaticBox(parent = self.panel, id = wx.ID_ANY,
                                    label = " %s " % _("List of extensions - double-click to install"))
        
        self.repo = wx.TextCtrl(parent = self.panel, id = wx.ID_ANY)
        
        # modelBuilder loads data into tree model
        self.modelBuilder = ExtensionTreeModelBuilder()
        # tree view displays model data
        self.tree = CTreeView(parent=self.panel, model=self.modelBuilder.GetModel())
        
        self.search = SearchModuleWidget(parent=self.panel, model=self.modelBuilder.GetModel(),
                                         showChoice = False)
        self.search.showSearchResult.connect(lambda result: self.tree.Select(result))
        # show text in statusbar when notification appears
        self.search.showNotification.connect(lambda message: self.SetStatusText(message))

        self.optionBox = wx.StaticBox(parent = self.panel, id = wx.ID_ANY,
                                      label = " %s " % _("Options"))
        if sys.platform == 'win32':
            task = gtask.parse_interface('g.extension.py')
        else:
            task = gtask.parse_interface('g.extension')
        ignoreFlags = ['l', 'c', 'g', 'a', 'f', 't', 'quiet']
        if sys.platform == 'win32':
            ignoreFlags.append('d')
            ignoreFlags.append('i')
        
        for f in task.get_options()['flags']:
            name = f.get('name', '')
            desc = f.get('label', '')
            if not desc:
                desc = f.get('description', '')
            if not name and not desc:
                continue
            if name in ignoreFlags:
                continue
            self.options[name] = wx.CheckBox(parent = self.panel, id = wx.ID_ANY,
                                             label = desc)
        defaultUrl = 'http://svn.osgeo.org/grass/grass-addons/grass7'
        self.repo.SetValue(task.get_param(value = 'svnurl').get('default', defaultUrl))
        
        self.statusbar = self.CreateStatusBar(number = 1)
        
        self.btnFetch = wx.Button(parent = self.panel, id = wx.ID_ANY,
                                  label = _("&Fetch"))
        self.btnFetch.SetToolTipString(_("Fetch list of available modules "
                                         "from GRASS Addons SVN repository"))
        self.btnClose = wx.Button(parent = self.panel, id = wx.ID_CLOSE)
        self.btnInstall = wx.Button(parent = self.panel, id = wx.ID_ANY,
                                    label = _("&Install"))
        self.btnInstall.SetToolTipString(_("Install selected add-ons GRASS module"))
        self.btnInstall.Enable(False)
        self.btnHelp = wx.Button(parent = self.panel, id = wx.ID_HELP)
        self.btnHelp.SetToolTipString(_("Show g.extension manual page"))
        
        self.btnClose.Bind(wx.EVT_BUTTON, lambda evt: self.Close())
        self.btnFetch.Bind(wx.EVT_BUTTON, self.OnFetch)
        self.btnInstall.Bind(wx.EVT_BUTTON, self.OnInstall)
        self.btnHelp.Bind(wx.EVT_BUTTON, self.OnHelp)
        self.tree.selectionChanged.connect(self.OnItemSelected)
        self.tree.itemActivated.connect(self.OnItemActivated)

        wx.CallAfter(self._fetch)
        
        self._layout()

    def _layout(self):
        """!Do layout"""
        sizer = wx.BoxSizer(wx.VERTICAL)
        repoSizer = wx.StaticBoxSizer(self.repoBox, wx.VERTICAL)
        repo1Sizer = wx.BoxSizer(wx.HORIZONTAL)
        repo1Sizer.Add(item = self.repo, proportion = 1,
                      flag = wx.ALL | wx.ALIGN_CENTER_VERTICAL, border = 1)
        repo1Sizer.Add(item = self.btnFetch, proportion = 0,
                      flag = wx.ALL | wx.ALIGN_CENTER_VERTICAL, border = 1)
        repoSizer.Add(item = repo1Sizer,
                      flag = wx.EXPAND)
        
        findSizer = wx.BoxSizer(wx.HORIZONTAL)
        findSizer.Add(item = self.search, proportion = 1)
        
        treeSizer = wx.StaticBoxSizer(self.treeBox, wx.HORIZONTAL)
        treeSizer.Add(item = self.tree, proportion = 1,
                      flag = wx.ALL | wx.EXPAND, border = 1)

        # options
        optionSizer = wx.StaticBoxSizer(self.optionBox, wx.VERTICAL)
        for key in self.options.keys():
            optionSizer.Add(item = self.options[key], proportion = 0)
        
        btnSizer = wx.BoxSizer(wx.HORIZONTAL)
        btnSizer.Add(item = self.btnHelp, proportion = 0)
        btnSizer.AddStretchSpacer()
        btnSizer.Add(item = self.btnClose, proportion = 0,
                     flag = wx.RIGHT, border = 5)
        btnSizer.Add(item = self.btnInstall, proportion = 0)
        
        sizer.Add(item = repoSizer, proportion = 0,
                  flag = wx.ALL | wx.EXPAND, border = 3)
        sizer.Add(item = findSizer, proportion = 0,
                  flag = wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND, border = 3)
        sizer.Add(item = treeSizer, proportion = 1,
                  flag = wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND, border = 3)
        sizer.Add(item = optionSizer, proportion = 0,
                        flag = wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND, border = 3)
        sizer.Add(item = btnSizer, proportion = 0,
                  flag = wx.ALIGN_RIGHT | wx.ALL | wx.EXPAND, border = 5)
        
        self.panel.SetSizer(sizer)
        sizer.Fit(self.panel)
        
        self.Layout()

    def _getCmd(self):
        item = self.tree.GetSelected()
        if not item or 'command' not in item[0].data:
            GError(_("Extension not defined"), parent = self)
            return

        name = item[0].data['command']
        
        flags = list()
        for key in self.options.keys():
            if self.options[key].IsChecked():
                if len(key) == 1:
                    flags.append('-%s' % key)
                else:
                    flags.append('--%s' % key)
        
        return ['g.extension'] + flags + ['extension=' + name,
                                          'svnurl=' + self.repo.GetValue().strip()]

    def OnFetch(self, event):
        """!Fetch list of available extensions"""
        self._fetch()

    def _fetch(self):
        """!Fetch list of available extensions"""
        wx.BeginBusyCursor()
        self.SetStatusText(_("Fetching list of modules from GRASS-Addons SVN (be patient)..."), 0)
        try:
            self.modelBuilder.Load(url = self.repo.GetValue().strip())
        except GException, e:
            GError(unicode(e), parent = self, showTraceback = False)
        
        self.tree.RefreshItems()
        self.SetStatusText("", 0)
        wx.EndBusyCursor()

    def OnItemActivated(self, node):
        data = node.data
        if data and 'command' in data:
            self.OnInstall(event=None)
        
    def OnInstall(self, event):
        """!Install selected extension"""
        log = self.parent.GetLogWindow()
        cmd = self._getCmd()
        if cmd:
            log.RunCmd(cmd, onDone = self.OnDone)
        
    def OnDone(self, cmd, returncode):
        if returncode == 0:
            if not os.getenv('GRASS_ADDON_BASE'):
                SetAddOnPath(key = 'BASE')
            
            globalvar.UpdateGRASSAddOnCommands()
            toolboxesOutdated()

    def OnHelp(self, event):
        self._giface.Help(entry='g.extension')

    def OnItemSelected(self, node):
        """!Item selected"""
        data = node.data
        if data is None:
            self.SetStatusText('', 0)
            self.btnInstall.Enable(False)
        else:
            self.SetStatusText(data.get('description', ''), 0)
            self.btnInstall.Enable(True)


class ExtensionTreeModelBuilder:
    """!Tree model of available extensions."""
    def __init__(self):
        self.mainNodes = dict()
        self.model = TreeModel(ModuleNode)
        for prefix in ('display', 'database',
                       'general', 'imagery',
                       'misc', 'postscript', 'paint',
                       'raster', 'raster3D', 'sites', 'vector', 'wxGUI', 'other'):
            node = self.model.AppendNode(parent=self.model.root, label=prefix)
            self.mainNodes[prefix] = node
        
    def GetModel(self):
        return self.model

    def _emptyTree(self):
        """!Remove modules from tree keeping the main structure"""
        for node in self.mainNodes.values():
            for child in reversed(node.children):
                self.model.RemoveNode(child)
        
    def _expandPrefix(self, c):
        name = { 'd'  : 'display',
                 'db' : 'database',
                 'g'  : 'general',
                 'i'  : 'imagery',
                 'm'  : 'misc',
                 'ps' : 'postscript',
                 'p'  : 'paint',
                 'r'  : 'raster',
                 'r3' : 'raster3D',
                 's'  : 'sites',
                 'v'  : 'vector',
                 'wx' : 'wxGUI',
                 ''   : 'other' }
        
        if c in name:
            return name[c]
        
        return c
    
    def Load(self, url, full = True):
        """!Load list of extensions"""
        self._emptyTree()
        
        if full:
            flags = 'g'
        else:
            flags = 'l'
        ret = RunCommand('g.extension', read = True,
                         svnurl = url,
                         flags = flags, quiet = True)
        if not ret:
            raise GException(_("Unable to load extensions."))
        
        currentNode = None
        for line in ret.splitlines():
            if full:
                try:
                    key, value = line.split('=', 1)
                except ValueError:
                    key = 'name'
                    value = line

                if key == 'name':
                    try:
                        prefix, name = value.split('.', 1)
                    except ValueError:
                        prefix = ''
                        name = value
                    mainNode = self.mainNodes[self._expandPrefix(prefix)]
                    currentNode = self.model.AppendNode(parent=mainNode, label=value)
                    currentNode.data = {'command': value}
                else:
                    if currentNode is not None:
                        currentNode.data[key] = value
            else:
                try:
                    prefix, name = line.strip().split('.', 1)
                except ValueError:
                    prefix = ''
                    name = line.strip()
                
                if self._expandPrefix(prefix) == prefix:
                    prefix = ''
                module = prefix + '.' + name
                mainNode = self.mainNodes[self._expandPrefix(prefix)]
                currentNode = self.model.AppendNode(parent=mainNode, label=module)
                currentNode.data = {'command': module,
                                    'keywords': '',
                                    'description': ''}        
        
class UninstallExtensionWindow(wx.Frame):
    def __init__(self, parent, id = wx.ID_ANY,
                 title = _("Uninstall GRASS Addons extensions"), **kwargs):
        self.parent = parent
        
        wx.Frame.__init__(self, parent = parent, id = id, title = title, **kwargs)
        self.SetIcon(wx.Icon(os.path.join(globalvar.ETCICONDIR, 'grass.ico'), wx.BITMAP_TYPE_ICO))
        
        self.panel = wx.Panel(parent = self, id = wx.ID_ANY)

        self.extBox = wx.StaticBox(parent = self.panel, id = wx.ID_ANY,
                                   label = " %s " % _("List of installed extensions"))
        
        self.extList = CheckListExtension(parent = self.panel)

        # buttons
        self.btnUninstall = wx.Button(parent = self.panel, id = wx.ID_ANY,
                                    label = _("&Uninstall"))
        self.btnUninstall.SetToolTipString(_("Uninstall selected AddOns extensions"))
        self.btnClose = wx.Button(parent = self.panel, id = wx.ID_CLOSE)
        
        self.btnUninstall.Bind(wx.EVT_BUTTON, self.OnUninstall)
        self.btnClose.Bind(wx.EVT_BUTTON, lambda evt: self.Close())
        
        self._layout()
        
    def _layout(self):
        """!Do layout"""
        sizer = wx.BoxSizer(wx.VERTICAL)
        
        extSizer = wx.StaticBoxSizer(self.extBox, wx.HORIZONTAL)
        extSizer.Add(item = self.extList, proportion = 1,
                     flag = wx.ALL | wx.EXPAND, border = 1)
        
        btnSizer = wx.BoxSizer(wx.HORIZONTAL)
        btnSizer.Add(item = self.btnClose, proportion = 0,
                     flag = wx.RIGHT, border = 5)
        btnSizer.Add(item = self.btnUninstall, proportion = 0)
        
        sizer.Add(item = extSizer, proportion = 1,
                  flag = wx.ALL | wx.EXPAND, border = 3)
        sizer.Add(item = btnSizer, proportion = 0,
                  flag = wx.ALIGN_RIGHT | wx.ALL, border = 5)
        
        self.panel.SetSizer(sizer)
        sizer.Fit(self.panel)
        
        self.Layout()

    def OnUninstall(self, event):
        """!Uninstall selected extensions"""
        eList = self.extList.GetExtensions()
        if not eList:
            GError(_("No extension selected for removal. "
                     "Operation canceled."),
                   parent = self)
            return
        
        for ext in eList:
            files = RunCommand('g.extension', parent = self, read = True, quiet = True,
                               extension = ext, operation = 'remove').splitlines()
            dlg = wx.MessageDialog(parent = self,
                                   message = _("List of files to be removed:\n%(files)s\n\n"
                                               "Do you want really to remove <%(ext)s> extension?") % \
                                       { 'files' : os.linesep.join(files), 'ext' : ext },
                                   caption = _("Remove extension"),
                                   style = wx.YES_NO | wx.NO_DEFAULT | wx.ICON_QUESTION)
            
            if dlg.ShowModal() ==  wx.ID_YES:
                RunCommand('g.extension', flags = 'f', parent = self, quiet = True,
                           extension = ext, operation = 'remove')
        
        self.extList.LoadData()
        
        # update prompt
        globalvar.UpdateGRASSAddOnCommands(eList)
        toolboxesOutdated()

        
class CheckListExtension(GListCtrl):
    """!List of mapset/owner/group"""
    def __init__(self, parent):
        GListCtrl.__init__(self, parent)
        
        # load extensions
        self.InsertColumn(0, _('Extension'))
        self.LoadData()
        
    def LoadData(self):
        """!Load data into list"""
        self.DeleteAllItems()
        for ext in RunCommand('g.extension',
                              quiet = True, parent = self, read = True,
                              flags = 'a').splitlines():
            if ext:
                self.InsertStringItem(sys.maxint, ext)

    def GetExtensions(self):
        """!Get extensions to be un-installed
        """
        extList = list()
        for i in range(self.GetItemCount()):
            if self.IsChecked(i):
                name = self.GetItemText(i)
                if name:
                    extList.append(name)
        
        return extList