#!/usr/bin/env python3
############################################################################
#
# MODULE:    g.gui.rdigit
# AUTHOR(S): Anna Petrasova <kratochanna gmail.com>,
#            Tomas Zigo <tomas.zigo slovanet.sk> (standalone module)
# PURPOSE:   wxGUI Raster Digitizer
# COPYRIGHT: (C) 2014-2020 by Anna Petrasova, and the GRASS Development Team
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License as
#  published by the Free Software Foundation; either version 2 of the
#  License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful, but
#  WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
#  General Public License for more details.
#
############################################################################

# %module
# % description: Interactive editing and digitizing of raster maps.
# % keyword: general
# % keyword: GUI
# % keyword: raster
# % keyword: editing
# % keyword: digitizer
# %end
# %option G_OPT_R_OUTPUT
# % key: create
# % label: Name of new raster map to create
# % required: no
# % guisection: Create
# %end
# %option G_OPT_R_BASE
# % required: no
# % guisection: Create
# %end
# %option G_OPT_R_TYPE
# % answer: CELL
# % required: no
# % guisection: Create
# %end
# %option G_OPT_R_INPUT
# % key: edit
# % required: no
# % label: Name of existing raster map to edit
# % guisection: Edit
# %end
# %rules
# % exclusive: create, edit
# % required: create, edit
# % requires: base, create
# %end

import os

import grass.script as gs


def main():
    gs.set_raise_on_error(False)

    options, flags = gs.parser()

    # import wx only after running parser
    # to avoid issues with complex imports when only interface is needed
    import wx

    from grass.script.setup import set_gui_path
    set_gui_path()

    from core.render import Map
    from mapdisp.frame import MapFrame
    from mapdisp.main import DMonGrassInterface
    from core.settings import UserSettings

    # define classes which needs imports as local
    # for longer definitions, a separate file would be a better option
    class RDigitMapFrame(MapFrame):

        def __init__(
                self, new_map=None, base_map=None, edit_map=None,
                map_type=None,
        ):
            MapFrame.__init__(
                self, parent=None, Map=Map(),
                giface=DMonGrassInterface(None),
                title=_("Raster Digitizer - GRASS GIS"),
                size=(850, 600),
            )
            # this giface issue not solved yet, we must set mapframe afterwards
            self._giface._mapframe = self
            self._giface.mapCreated.connect(self.OnMapCreated)
            self._mapObj = self.GetMap()

            # load raster map
            self._addLayer(name=new_map if new_map else edit_map)

            # switch toolbar
            self.AddToolbar('rdigit', fixed=True)

            rdigit = self.toolbars['rdigit']
            if new_map:
                rdigit._mapSelectionCombo.Unbind(wx.EVT_COMBOBOX)
                self.rdigit.SelectNewMap(
                    standalone=True, mapName=new_map, bgMap=base_map,
                    mapType=map_type,
                )
                rdigit._mapSelectionCombo.Bind(
                    wx.EVT_COMBOBOX, rdigit.OnMapSelection,
                )
            else:
                rdigit._mapSelectionCombo.SetSelection(n=1)
                rdigit.OnMapSelection()

        def _addLayer(self, name, ltype='raster'):
            """Add layer into map

            :param str name: map name
            :param str ltype: layer type
            """
            mapLayer = self._mapObj.AddLayer(
                ltype=ltype, name=name,
                command=['d.rast', "map={}".format(name)],
                active=True, hidden=False, opacity=1.0, render=True,
            )

        def OnMapCreated(self, name, ltype):
            """Add new created raster layer into map

            :param str name: map name
            :param str ltype: layer type
            """
            self._mapObj.Clean()
            self._addLayer(name=name, ltype=ltype)
            self.GetMapWindow().UpdateMap()

    kwargs = {
        'new_map': options['create'],
        'base_map': options['base'],
        'edit_map': options['edit'],
        'map_type': options['type'],
    }

    mapset = gs.gisenv()['MAPSET']

    if kwargs['edit_map']:
        edit_map = gs.find_file(
            name=kwargs['edit_map'], element='raster',
            mapset=mapset,
        )['fullname']

        if not edit_map:
            gs.fatal(
                _(
                    "Raster map <{}> not found in current mapset.".format(
                        options['edit'],
                    ),
                ),
            )
        else:
            kwargs['edit_map'] = edit_map
    else:
        if kwargs['base_map']:
            base_map = gs.find_file(
                name=kwargs['base_map'], element='raster',
                mapset=mapset,
            )['fullname']
            if not base_map:
                gs.fatal(
                    _(
                        "Base raster map <{}> not found in "
                        "current mapset."
                        .format(
                            options['base'],
                        ),
                    ),
                )
            kwargs['base_map'] = base_map

    # allow immediate rendering
    driver = UserSettings.Get(
        group='display', key='driver', subkey='type',
    )
    if driver == 'png':
        os.environ['GRASS_RENDER_IMMEDIATE'] = 'png'
    else:
        os.environ['GRASS_RENDER_IMMEDIATE'] = 'cairo'

    app = wx.App()
    frame = RDigitMapFrame(**kwargs)
    frame.Show()

    app.MainLoop()

if __name__ == "__main__":
    main()