#!/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
#
# 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
from plcopen.structures import TestIdentifier, IEC_KEYWORDS

# -------------------------------------------------------------------------------
#                                POU Name Dialog
# -------------------------------------------------------------------------------


class PouNameDialog(wx.TextEntryDialog):

    def __init__(self, parent, message, caption=_("Please enter text"), defaultValue="",
                 style=wx.OK | wx.CANCEL | wx.CENTRE, pos=wx.DefaultPosition):
        wx.TextEntryDialog.__init__(self, parent, message, caption, defaultValue, style, pos)

        self.PouNames = []

        self.Bind(wx.EVT_BUTTON, self.OnOK,
                  self.GetSizer().GetItem(2).GetSizer().GetItem(1).GetSizer().GetAffirmativeButton())

    def OnOK(self, event):
        message = None
        step_name = self.GetSizer().GetItem(1).GetWindow().GetValue()
        if step_name == "":
            message = _("You must type a name!")
        elif not TestIdentifier(step_name):
            message = _("\"%s\" is not a valid identifier!") % step_name
        elif step_name.upper() in IEC_KEYWORDS:
            message = _("\"%s\" is a keyword. It can't be used!") % step_name
        elif step_name.upper() in self.PouNames:
            message = _("A POU named \"%s\" already exists!") % step_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)
        event.Skip()

    def SetPouNames(self, pou_names):
        self.PouNames = [pou_name.upper() for pou_name in pou_names]