#!/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) 2012: 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.

import wx

from plcopen.structures import TestIdentifier, IEC_KEYWORDS

#-------------------------------------------------------------------------------
#                                POU Transition Dialog
#-------------------------------------------------------------------------------

def GetTransitionLanguages():
    _ = lambda x : x
    return [_("IL"), _("ST"), _("LD"), _("FBD")]
TRANSITION_LANGUAGES_DICT = dict([(_(language), language) for language in GetTransitionLanguages()])

class PouTransitionDialog(wx.Dialog):
    
    def __init__(self, parent):
        wx.Dialog.__init__(self, parent, title=_('Create a new transition'))
        
        main_sizer = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=10)
        main_sizer.AddGrowableCol(0)
        main_sizer.AddGrowableRow(0)
        
        infos_sizer = wx.FlexGridSizer(cols=2, hgap=5, rows=3, vgap=10)
        infos_sizer.AddGrowableCol(1)
        main_sizer.AddSizer(infos_sizer, border=20, 
              flag=wx.GROW|wx.TOP|wx.LEFT|wx.RIGHT)
        
        transitionname_label = wx.StaticText(self, label=_('Transition Name:'))
        infos_sizer.AddWindow(transitionname_label, border=4, 
              flag=wx.ALIGN_CENTER_VERTICAL|wx.TOP)

        self.TransitionName = wx.TextCtrl(self, size=wx.Size(180,-1))
        infos_sizer.AddWindow(self.TransitionName, flag=wx.GROW)

        language_label = wx.StaticText(self, label=_('Language:'))
        infos_sizer.AddWindow(language_label, border=4, 
              flag=wx.ALIGN_CENTER_VERTICAL|wx.TOP)
        
        self.Language = wx.ComboBox(self, style=wx.CB_READONLY)
        infos_sizer.AddWindow(self.Language, flag=wx.GROW)

        button_sizer = self.CreateButtonSizer(wx.OK|wx.CANCEL|wx.CENTRE)
        self.Bind(wx.EVT_BUTTON, self.OnOK, button_sizer.GetAffirmativeButton())
        main_sizer.AddSizer(button_sizer, border=20, flag=wx.ALIGN_RIGHT|wx.BOTTOM)
        
        self.SetSizer(main_sizer)
        
        for language in GetTransitionLanguages():
            self.Language.Append(_(language))
            
        self.Fit()
        self.PouNames = []
        self.PouElementNames = []
        
    def OnOK(self, event):
        error = []
        transition_name = self.TransitionName.GetValue()
        if self.TransitionName.GetValue() == "":
            error.append(_("Transition Name"))
        if self.Language.GetSelection() == -1:
            error.append(_("Language"))
        message = None
        if len(error) > 0:
            text = ""
            for i, item in enumerate(error):
                if i == 0:
                    text += item
                elif i == len(error) - 1:
                    text += _(" and %s")%item
                else:
                    text += _(", %s")%item 
            message = _("Form isn't complete. %s must be filled!") % text
        elif not TestIdentifier(transition_name):
            message = _("\"%s\" is not a valid identifier!") % transition_name
        elif transition_name.upper() in IEC_KEYWORDS:
            message = _("\"%s\" is a keyword. It can't be used!") % transition_name
        elif transition_name.upper() in self.PouNames:
            message = _("A POU named \"%s\" already exists!") % transition_name
        elif transition_name.upper() in self.PouElementNames:
            message = _("\"%s\" element for this pou already exists!") % transition_name
        if message is not None:
            dialog = wx.MessageDialog(self, message, _("Error"), wx.OK|wx.ICON_ERROR)
            dialog.ShowModal()
            dialog.Destroy()
        else:
            self.EndModal(wx.ID_OK)
    
    def SetPouNames(self, pou_names):
        self.PouNames = [pou_name.upper() for pou_name in pou_names]
    
    def SetPouElementNames(self, pou_names):
        self.PouElementNames = [pou_name.upper() for pou_name in pou_names]
    
    def SetValues(self, values):
        for item, value in values.items():
            if item == "transitionName":
                self.TransitionName.SetValue(value)
            elif item == "language":
                self.Language.SetSelection(_(value))
                
    def GetValues(self):
        values = {}
        values["transitionName"] = self.TransitionName.GetValue()
        values["language"] = TRANSITION_LANGUAGES_DICT[self.Language.GetStringSelection()]
        return values