"""
@package iclass.toolbars

@brief wxIClass toolbars and icons.

Classes:
 - toolbars::IClassMapToolbar
 - toolbars::IClassToolbar
 - toolbars::IClassMapManagerToolbar
 - toolbars::IClassMiscToolbar

(C) 2006-2011 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 Vaclav Petras <wenzeslaus gmail.com>
@author Anna Kratochvilova <kratochanna gmail.com>
"""

from __future__ import print_function

import wx

from gui_core.toolbars import BaseToolbar, BaseIcons
from icons.icon import MetaIcon
from iclass.dialogs import IClassMapDialog, ContrastColor
from gui_core.forms import GUI
from gui_core.wrap import StaticText

import grass.script as grass

iClassIcons = {
    "opacity": MetaIcon(img="layer-opacity", label=_("Set opacity level")),
    "classManager": MetaIcon(img="table-manager", label=_("Class manager")),
    "selectGroup": MetaIcon(img="layer-group-add", label=_("Select imagery group")),
    "run": MetaIcon(
        img="execute", label=_("Run analysis, update histogram and coincidence plots")
    ),
    "sigFile": MetaIcon(img="script-save", label=_("Save signature file for i.maxlik")),
    "delCmd": MetaIcon(img="layer-remove", label=_("Remove selected map layer")),
    "exportAreas": MetaIcon(
        img="layer-export", label=_("Export training areas to vector map")
    ),
    "importAreas": MetaIcon(
        img="layer-import", label=_("Import training areas from vector map")
    ),
    "addRgb": MetaIcon(img="layer-rgb-add", label=_("Add RGB map layer")),
}


class IClassMapToolbar(BaseToolbar):
    """IClass Map toolbar"""

    def __init__(self, parent, toolSwitcher):
        """IClass Map toolbar constructor"""
        BaseToolbar.__init__(self, parent, toolSwitcher)

        self.InitToolbar(self._toolbarData())
        self._default = self.pan

        # add tool to toggle active map window
        self.togglemap = wx.Choice(
            parent=self, id=wx.ID_ANY, choices=[_("Training"), _("Preview")]
        )

        self.InsertControl(9, self.togglemap)

        self.SetToolShortHelp(
            self.togglemap.GetId(),
            "%s %s %s"
            % (
                _("Set map canvas for "),
                BaseIcons["zoomBack"].GetLabel(),
                _("/ Zoom to map"),
            ),
        )

        for tool in (self.pan, self.zoomIn, self.zoomOut):
            self.toolSwitcher.AddToolToGroup(group="mouseUse", toolbar=self, tool=tool)
        # realize the toolbar
        self.Realize()

        self.EnableTool(self.zoomBack, False)

    def GetActiveMapTool(self):
        """Return widget for selecting active maps"""
        return self.togglemap

    def GetActiveMap(self):
        """Get currently selected map"""
        return self.togglemap.GetSelection()

    def SetActiveMap(self, index):
        """Set currently selected map"""
        return self.togglemap.SetSelection(index)

    def _toolbarData(self):
        """Toolbar data"""
        icons = BaseIcons
        return self._getToolbarData(
            (
                (
                    ("displaymap", icons["display"].label),
                    icons["display"],
                    self.parent.OnDraw,
                ),
                (
                    ("rendermap", icons["render"].label),
                    icons["render"],
                    self.parent.OnRender,
                ),
                (
                    ("erase", icons["erase"].label),
                    icons["erase"],
                    self.parent.OnErase,
                ),
                (None,),
                (
                    ("pan", icons["pan"].label),
                    icons["pan"],
                    self.parent.OnPan,
                    wx.ITEM_CHECK,
                ),
                (
                    ("zoomIn", icons["zoomIn"].label),
                    icons["zoomIn"],
                    self.parent.OnZoomIn,
                    wx.ITEM_CHECK,
                ),
                (
                    ("zoomOut", icons["zoomOut"].label),
                    icons["zoomOut"],
                    self.parent.OnZoomOut,
                    wx.ITEM_CHECK,
                ),
                (
                    ("zoomRegion", icons["zoomRegion"].label),
                    icons["zoomRegion"],
                    self.parent.OnZoomToWind,
                ),
                (
                    ("zoomMenu", icons["zoomMenu"].label),
                    icons["zoomMenu"],
                    self.parent.OnZoomMenu,
                ),
                (None,),
                (
                    ("zoomBack", icons["zoomBack"].label),
                    icons["zoomBack"],
                    self.parent.OnZoomBack,
                ),
                (
                    ("zoomToMap", icons["zoomExtent"].label),
                    icons["zoomExtent"],
                    self.parent.OnZoomToMap,
                ),
                (
                    ("mapDispSettings", BaseIcons["mapDispSettings"].label),
                    BaseIcons["mapDispSettings"],
                    self.parent.OnMapDisplayProperties,
                ),
            )
        )


class IClassToolbar(BaseToolbar):
    """IClass toolbar"""

    def __init__(self, parent, stats_data):
        """IClass toolbar constructor"""
        self.stats_data = stats_data

        BaseToolbar.__init__(self, parent)
        self.InitToolbar(self._toolbarData())

        self.choice = wx.Choice(parent=self, id=wx.ID_ANY, size=(110, -1))
        self.InsertControl(3, self.choice)

        self.choice.Bind(wx.EVT_CHOICE, self.OnSelectCategory)

        # stupid workaround to insert small space between controls
        self.InsertControl(4, StaticText(self, id=wx.ID_ANY, label=" "))

        self.combo = wx.ComboBox(
            self, id=wx.ID_ANY, size=(130, -1), style=wx.TE_PROCESS_ENTER
        )
        self.InitStddev()
        self.InsertControl(5, self.combo)

        self.EnableControls(False)

        self.combo.Bind(wx.EVT_COMBOBOX, self.OnStdChangeSelection)
        self.combo.Bind(wx.EVT_TEXT_ENTER, self.OnStdChangeText)

        self.stats_data.statisticsAdded.connect(self.Update)
        self.stats_data.statisticsDeleted.connect(self.Update)
        self.stats_data.allStatisticsDeleted.connect(self.Update)
        self.stats_data.statisticsSet.connect(self.Update)

        # realize the toolbar
        self.Realize()

    def _toolbarData(self):
        """Toolbar data"""
        icons = iClassIcons
        return self._getToolbarData(
            (
                (
                    ("selectGroup", icons["selectGroup"].label),
                    icons["selectGroup"],
                    lambda event: self.parent.AddBands(),
                ),
                (None,),
                (
                    ("classManager", icons["classManager"].label),
                    icons["classManager"],
                    self.parent.OnCategoryManager,
                ),
                (None,),
                (
                    ("runAnalysis", icons["run"].label),
                    icons["run"],
                    self.parent.OnRunAnalysis,
                ),
                (None,),
                (
                    ("importAreas", icons["importAreas"].label),
                    icons["importAreas"],
                    self.parent.OnImportAreas,
                ),
                (
                    ("exportAreas", icons["exportAreas"].label),
                    icons["exportAreas"],
                    self.parent.OnExportAreas,
                ),
                (
                    ("sigFile", icons["sigFile"].label),
                    icons["sigFile"],
                    self.parent.OnSaveSigFile,
                ),
            )
        )

    def OnMotion(self, event):
        print(self.choice.GetStringSelection())

    def OnSelectCategory(self, event):
        idx = self.choice.GetSelection()
        cat = self.choice.GetClientData(idx)

        self._updateColor(cat)
        self.parent.CategoryChanged(currentCat=cat)

    def _updateColor(self, cat):

        if cat:
            stat = self.stats_data.GetStatistics(cat)
            back_c = wx.Colour([int(x) for x in stat.color.split(":")])
            text_c = wx.Colour(*ContrastColor(back_c))
        else:
            back_c = wx.SystemSettings.GetColour(wx.SYS_COLOUR_BACKGROUND)
            text_c = wx.SystemSettings.GetColour(wx.SYS_COLOUR_BTNTEXT)

        self.choice.SetForegroundColour(text_c)
        self.choice.SetBackgroundColour(back_c)

    def SetCategories(self, catNames, catIdx):
        self.choice.Clear()
        for name, idx in zip(catNames, catIdx):
            self.choice.Append(name, idx)

    def GetSelectedCategoryName(self):
        return self.choice.GetStringSelection()

    def GetSelectedCategoryIdx(self):
        idx = self.choice.GetSelection()
        if idx != wx.NOT_FOUND:
            return self.choice.GetClientData(idx)

        return None

    def OnStdChangeSelection(self, event):
        idx = self.combo.GetSelection()
        nstd = self.combo.GetClientData(idx)

        self.StddevChanged(nstd)

    def OnStdChangeText(self, event):
        val = self.combo.GetValue().strip()
        try:
            nstd = float(val)
        except ValueError:
            try:
                nstd = float(val.split()[0])
            except ValueError:
                nstd = None

        if nstd is not None:
            self.StddevChanged(nstd)

    def StddevChanged(self, nstd):
        idx = self.GetSelectedCategoryIdx()
        if not idx:
            return

        self.parent.StddevChanged(cat=idx, nstd=nstd)

    def UpdateStddev(self, nstd):
        self.combo.SetValue(" ".join(("%.2f" % nstd, _("std dev"))))

    def InitStddev(self):
        for nstd in range(50, 250, 25):
            nstd /= 100.0
            self.combo.Append(
                item=" ".join(("%.2f" % nstd, _("std dev"))), clientData=nstd
            )
        self.combo.SetSelection(4)  # 1.5

    def EnableControls(self, enable=True):
        self.combo.Enable(enable)
        self.choice.Enable(enable)

    def Update(self, *args, **kwargs):
        name = self.GetSelectedCategoryName()
        catNames = []

        cats = self.stats_data.GetCategories()
        for cat in cats:
            stat = self.stats_data.GetStatistics(cat)
            catNames.append(stat.name)
        self.SetCategories(catNames=catNames, catIdx=cats)
        if name in catNames:
            self.choice.SetStringSelection(name)
            cat = self.GetSelectedCategoryIdx()
        elif catNames:
            self.choice.SetSelection(0)
            cat = self.GetSelectedCategoryIdx()
        else:
            cat = None

        if self.choice.IsEmpty():
            self.EnableControls(False)
        else:
            self.EnableControls(True)

        self._updateColor(cat)
        self.parent.CategoryChanged(cat)
        # don't forget to update maps, histo, ...


class IClassMapManagerToolbar(BaseToolbar):
    """IClass toolbar"""

    def __init__(self, parent, mapManager):
        """IClass toolbar constructor"""
        BaseToolbar.__init__(self, parent)

        self.InitToolbar(self._toolbarData())
        self.choice = wx.Choice(parent=self, id=wx.ID_ANY, size=(300, -1))

        self.choiceid = self.AddControl(self.choice)

        self.choice.Bind(wx.EVT_CHOICE, self.OnSelectLayer)

        self.mapManager = mapManager
        # realize the toolbar
        self.Realize()

    def _toolbarData(self):
        """Toolbar data"""
        return self._getToolbarData(
            (
                (
                    ("addRast", BaseIcons["addRast"].label),
                    BaseIcons["addRast"],
                    self.OnAddRast,
                ),
                (
                    ("addRgb", iClassIcons["addRgb"].label),
                    iClassIcons["addRgb"],
                    self.OnAddRGB,
                ),
                (
                    ("delRast", iClassIcons["delCmd"].label),
                    iClassIcons["delCmd"],
                    self.OnDelRast,
                ),
                (
                    ("setOpacity", iClassIcons["opacity"].label),
                    iClassIcons["opacity"],
                    self.OnSetOpacity,
                ),
            )
        )

    def OnSelectLayer(self, event):
        layer = self.choice.GetStringSelection()
        self.mapManager.SelectLayer(name=layer)

    def OnAddRast(self, event):
        dlg = IClassMapDialog(self, title=_("Add raster map"), element="raster")
        if dlg.ShowModal() == wx.ID_OK:
            raster = grass.find_file(name=dlg.GetMap(), element="cell")
            if raster["fullname"]:
                self.mapManager.AddLayer(name=raster["fullname"])

        dlg.Destroy()

    def OnAddRGB(self, event):
        cmd = ["d.rgb"]
        GUI(parent=self.parent).ParseCommand(cmd, completed=(self.GetOptData, "", ""))

    def GetOptData(self, dcmd, layer, params, propwin):
        if dcmd:
            self.mapManager.AddLayerRGB(cmd=dcmd)

    def OnDelRast(self, event):
        layer = self.choice.GetStringSelection()
        idx = self.choice.GetSelection()
        if layer:
            self.mapManager.RemoveLayer(name=layer, idx=idx)

    def OnSetOpacity(self, event):
        layer = self.choice.GetStringSelection()
        idx = self.choice.GetSelection()
        if idx == wx.NOT_FOUND:
            return

        self.mapManager.SetOpacity(name=layer)


class IClassMiscToolbar(BaseToolbar):
    """IClass toolbar"""

    def __init__(self, parent):
        """IClass toolbar constructor"""
        BaseToolbar.__init__(self, parent)

        self.InitToolbar(self._toolbarData())
        # realize the toolbar
        self.Realize()

    def _toolbarData(self):
        """Toolbar data"""
        icons = BaseIcons
        return self._getToolbarData(
            (
                (
                    ("help", icons["help"].label),
                    icons["help"],
                    self.parent.OnHelp,
                ),
                (
                    ("quit", icons["quit"].label),
                    icons["quit"],
                    self.parent.OnCloseWindow,
                ),
            )
        )
