"""
@package datacatalog::frame

@brief Data catalog frame class

Classes:
 - datacatalog::DataCatalogFrame

(C) 2014-2016 by Tereza Fiedlerova, and 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 Tereza Fiedlerova (original author)
@author Martin Landa <landa.martin gmail.com> (various improvements)
"""

import os
import sys

import wx

from core.utils import _
from core.globalvar import ICONDIR
from core.gcmd import RunCommand, GMessage
from datacatalog.tree import DataCatalogTree
from datacatalog.toolbars import DataCatalogToolbar


class DataCatalogFrame(wx.Frame):
    """Frame for testing purposes only."""

    def __init__(self, parent, giface=None):
        wx.Frame.__init__(self, parent=parent,
                          title=_('GRASS GIS Data Catalog'))
        self.SetName("DataCatalog")
        self.SetIcon(
            wx.Icon(
                os.path.join(
                    ICONDIR,
                    'grass.ico'),
                wx.BITMAP_TYPE_ICO))

        self._giface = giface
        self.panel = wx.Panel(self)

        self.toolbar = DataCatalogToolbar(parent=self)
        # workaround for http://trac.wxwidgets.org/ticket/13888
        if sys.platform != 'darwin':
            self.SetToolBar(self.toolbar)

        # tree
        self.tree = DataCatalogTree(parent=self.panel, giface=self._giface)
        self.tree.InitTreeItems()
        self.tree.ExpandCurrentMapset()
        self.tree.changeMapset.connect(lambda mapset:
                                       self.ChangeLocationMapset(location=None,
                                                                 mapset=mapset))
        self.tree.changeLocation.connect(lambda mapset, location:
                                         self.ChangeLocationMapset(location=location,
                                                                   mapset=mapset))

        # buttons
        self.btnClose = wx.Button(parent=self.panel, id=wx.ID_CLOSE)
        self.btnClose.SetToolTipString(_("Close GRASS GIS Data Catalog"))
        self.btnClose.SetDefault()

        # events
        self.btnClose.Bind(wx.EVT_BUTTON, self.OnCloseWindow)
        self.Bind(wx.EVT_CLOSE, self.OnCloseWindow)

        self._layout()

    def _layout(self):
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.tree, proportion=1, flag=wx.EXPAND)

        btnSizer = wx.BoxSizer(wx.HORIZONTAL)
        btnSizer.AddStretchSpacer()
        btnSizer.Add(self.btnClose)

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

        self.panel.SetSizer(sizer)
        sizer.Fit(self.panel)

        self.SetMinSize((400, 500))

    def OnCloseWindow(self, event):
        """Cancel button pressed"""
        if not isinstance(event, wx.CloseEvent):
            self.Destroy()

        event.Skip()

    def OnReloadTree(self, event):
        """Reload whole tree"""
        self.tree.ReloadTreeItems()
        self.tree.ExpandCurrentMapset()

    def OnReloadCurrentMapset(self, event):
        """Reload current mapset tree only"""
        self.tree.ReloadCurrentMapset()

    def SetRestriction(self, restrict):
        """Allow editing other mapsets or restrict editing to current mapset"""
        self.tree.SetRestriction(restrict)

    def ChangeLocationMapset(self, mapset, location=None):
        """Change mapset or location"""
        if location:
            if RunCommand('g.mapset', parent=self,
                          location=location,
                          mapset=mapset) == 0:
                GMessage(parent=self,
                         message=_("Current location is <%(loc)s>.\n"
                                   "Current mapset is <%(mapset)s>.") %
                         {'loc': location, 'mapset': mapset})
        else:
            if RunCommand('g.mapset',
                          parent=self,
                          mapset=mapset) == 0:
                GMessage(parent=self,
                         message=_("Current mapset is <%s>.") % mapset)

    def Filter(self, text):
        self.tree.Filter(text=text)
