#!/usr/bin/env python
# -*- coding: utf-8 -*-

# This file is part of Beremiz, a Integrated Development Environment for
# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
#
# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
# Copyright (C) 2017: Andrey Skvortsov <andrej.skvortzov@gmail.com>
#
# See COPYING file for copyrights details.
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.


from __future__ import absolute_import
import wx


class BrowseValuesLibraryDialog(wx.Dialog):
    """
    Modal dialog that helps in selecting predefined XML attributes sets out of hierarchically organized list
    """

    def __init__(self, parent, name, library, default=None):
        wx.Dialog.__init__(self,
                           name='BrowseValueDialog', parent=parent,
                           style=wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER,
                           title=_('Browse %s values library') % name)

        self.staticText1 = wx.StaticText(
            label=_('Choose a value for %s:') % name,
            name='staticText1', parent=self,
            pos=wx.Point(0, 0), size=wx.DefaultSize, style=0)

        self.ValuesLibrary = wx.TreeCtrl(
            name='ValuesLibrary', parent=self, pos=wx.Point(0, 0),
            size=wx.Size(400, 200),
            style=wx.TR_HAS_BUTTONS | wx.TR_SINGLE | wx.SUNKEN_BORDER | wx.TR_HIDE_ROOT | wx.TR_LINES_AT_ROOT)

        self.ButtonSizer = self.CreateButtonSizer(wx.OK | wx.CANCEL | wx.CENTRE)

        self.Bind(wx.EVT_BUTTON, self.OnOK, id=self.GetAffirmativeId())

        self.flexGridSizer1 = wx.FlexGridSizer(cols=1, hgap=0, rows=3, vgap=10)

        self.flexGridSizer1.Add(self.staticText1,   0, border=20, flag=wx.GROW | wx.TOP | wx.LEFT | wx.RIGHT)
        self.flexGridSizer1.Add(self.ValuesLibrary, 0, border=20, flag=wx.GROW | wx.LEFT | wx.RIGHT)
        self.flexGridSizer1.Add(self.ButtonSizer,    0, border=20, flag=wx.ALIGN_RIGHT | wx.BOTTOM | wx.LEFT | wx.RIGHT)

        self.flexGridSizer1.AddGrowableCol(0)
        self.flexGridSizer1.AddGrowableRow(1)

        self.SetSizer(self.flexGridSizer1)
        self.Fit()

        root = self.ValuesLibrary.AddRoot("")
        self.GenerateValuesLibraryBranch(root, library, default)

    def GenerateValuesLibraryBranch(self, root, children, default):
        for infos in children:
            item = self.ValuesLibrary.AppendItem(root, infos["name"])
            self.ValuesLibrary.SetPyData(item, infos["infos"])
            if infos["infos"] is not None and infos["infos"] == default:
                self.ValuesLibrary.SelectItem(item)
                self.ValuesLibrary.EnsureVisible(item)
            self.GenerateValuesLibraryBranch(item, infos["children"], default)

    def GetValueInfos(self):
        selected = self.ValuesLibrary.GetSelection()
        return self.ValuesLibrary.GetPyData(selected)

    def OnOK(self, event):
        selected = self.ValuesLibrary.GetSelection()
        if not selected.IsOk() or self.ValuesLibrary.GetPyData(selected) is None:
            message = wx.MessageDialog(self, _("No valid value selected!"), _("Error"), wx.OK | wx.ICON_ERROR)
            message.ShowModal()
            message.Destroy()
        else:
            self.EndModal(wx.ID_OK)