# -*- coding: utf-8 -*-

#This file is part of PLCOpenEditor, a library implementing an IEC 61131-3 editor
#based on the plcopen standard. 
#
#Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
#
#See COPYING file for copyrights details.
#
#This library 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 2.1 of the License, or (at your option) any later version.
#
#This library 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 library; if not, write to the Free Software
#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import wx

#-------------------------------------------------------------------------------
#                            Force Variable Dialog
#-------------------------------------------------------------------------------

LOCATIONDATATYPES = {"X" : ["BOOL"],
                     "B" : ["SINT", "USINT", "BYTE", "STRING"],
                     "W" : ["INT", "UINT", "WORD", "WSTRING"],
                     "D" : ["DINT", "UDINT", "REAL", "DWORD"],
                     "L" : ["LINT", "ULINT", "LREAL", "LWORD"]} 

def checkbool(v):
    return v in ["TRUE", "FALSE"]

def gen_check_function(f):
    def check_function(v):
        try:
            f(v)
            return True
        except:
            return False
    return check_function

checkinteger = gen_check_function(int)
checkfloat = gen_check_function(float)
checkstring = gen_check_function(str)

CheckTypeValue = {"BOOL": lambda x: x in ["TRUE", "FALSE"],
                  "SINT": checkinteger,
                  "INT": checkinteger,
                  "DINT": checkinteger,
                  "LINT": checkinteger,
                  "USINT": checkinteger,
                  "UINT": checkinteger,
                  "UDINT": checkinteger,
                  "ULINT": checkinteger,
                  "BYTE": checkinteger,
                  "WORD": checkinteger,
                  "DWORD": checkinteger,
                  "LWORD": checkinteger,
                  "REAL": checkfloat,
                  "LREAL": checkfloat,
                  "STRING": checkstring,
                  "WSTRING": checkstring,}


class ForceVariableDialog(wx.TextEntryDialog):

    if wx.VERSION < (2, 6, 0):
        def Bind(self, event, function, id = None):
            if id is not None:
                event(self, id, function)
            else:
                event(self, function)

    def __init__(self, parent, iec_type):
        wx.TextEntryDialog.__init__(self, parent, message = _("Forcing Variable Value"), 
                caption = _("Please enter value for a \"%s\" variable:"%iec_type), defaultValue = "", 
                style = wx.OK|wx.CANCEL|wx.CENTRE, pos = wx.DefaultPosition)
        
        self.IEC_Type = iec_type 
        if wx.VERSION >= (2, 8, 0):
            self.Bind(wx.EVT_BUTTON, self.OnOK, id=self.GetSizer().GetItem(2).GetSizer().GetItem(1).GetSizer().GetAffirmativeButton().GetId())
        elif wx.VERSION >= (2, 6, 0):
            self.Bind(wx.EVT_BUTTON, self.OnOK, id=self.GetSizer().GetItem(3).GetSizer().GetAffirmativeButton().GetId())
        else:
            self.Bind(wx.EVT_BUTTON, self.OnOK, id=self.GetSizer().GetItem(3).GetSizer().GetChildren()[0].GetSizer().GetChildren()[0].GetWindow().GetId())
    
    def OnOK(self, event):
        value = self.GetSizer().GetItem(1).GetWindow().GetValue()
        if value == "":
            message = wx.MessageDialog(self, _("You must type a value!"), _("Error"), wx.OK|wx.ICON_ERROR)
            message.ShowModal()
            message.Destroy()
        elif not CheckTypeValue[self.IEC_Type](value):
            message = wx.MessageDialog(self, _("Invalid value \"%s\" for \"%s\" variable!")%(value, self.IEC_Type), _("Error"), wx.OK|wx.ICON_ERROR)
            message.ShowModal()
            message.Destroy()
        else:
            self.EndModal(wx.ID_OK)

    def GetValue(self):
        return self.GetSizer().GetItem(1).GetWindow().GetValue()