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#!/usr/bin/env python

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

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import wx

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from plcopen.structures import TestIdentifier, IEC_KEYWORDS

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def GetPouTypes():

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    _ = lambda x : x

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    return [_("function"), _("functionBlock"), _("program")]

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POU_TYPES_DICT = dict([(_(pou_type), pou_type) for pou_type in GetPouTypes()])

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def GetPouLanguages():

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    _ = lambda x : x

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    return [_("IL"), _("ST"), _("LD"), _("FBD"), _("SFC")]

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class PouDialog(wx.Dialog):

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    POU_LANGUAGES = GetPouLanguages()

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    POU_LANGUAGES_DICT = dict([(_(language), language) for language in POU_LANGUAGES])

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    def __init__(self, parent, pou_type = None):

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        wx.Dialog.__init__(self, id=-1, parent=parent,

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              name='PouDialog', title=_('Create a new POU'),

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              size=wx.Size(300, 200), style=wx.DEFAULT_DIALOG_STYLE)

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        self.SetClientSize(wx.Size(300, 200))

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        main_sizer = wx.FlexGridSizer(cols=1, hgap=0, rows=2, vgap=10)

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        main_sizer.AddGrowableCol(0)

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        main_sizer.AddGrowableRow(0)

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        infos_sizer = wx.FlexGridSizer(cols=2, hgap=5, rows=3, vgap=15)

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        infos_sizer.AddGrowableCol(1)

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        main_sizer.AddSizer(infos_sizer, border=20,

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              flag=wx.GROW|wx.TOP|wx.LEFT|wx.RIGHT)

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        pouname_label = wx.StaticText(self, label=_('POU Name:'))

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        infos_sizer.AddWindow(pouname_label, border=4,

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              flag=wx.ALIGN_CENTER_VERTICAL|wx.TOP)

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        self.PouName = wx.TextCtrl(self)

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        infos_sizer.AddWindow(self.PouName, flag=wx.GROW)

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        poutype_label = wx.StaticText(self, label=_('POU Type:'))

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        infos_sizer.AddWindow(poutype_label, border=4,

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              flag=wx.ALIGN_CENTER_VERTICAL|wx.TOP)

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        self.PouType = wx.ComboBox(self, style=wx.CB_READONLY)

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        self.Bind(wx.EVT_COMBOBOX, self.OnTypeChanged, self.PouType)

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        infos_sizer.AddWindow(self.PouType, flag=wx.GROW)

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        language_label = wx.StaticText(self, label=_('Language:'))

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        infos_sizer.AddWindow(language_label, border=4,

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              flag=wx.ALIGN_CENTER_VERTICAL|wx.TOP)

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        self.Language = wx.ComboBox(self, style=wx.CB_READONLY)

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        infos_sizer.AddWindow(self.Language, flag=wx.GROW)

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

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        self.Bind(wx.EVT_BUTTON, self.OnOK, button_sizer.GetAffirmativeButton())

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        main_sizer.AddSizer(button_sizer, border=20,

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              flag=wx.ALIGN_RIGHT|wx.BOTTOM|wx.LEFT|wx.RIGHT)

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        self.SetSizer(main_sizer)

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        for option in GetPouTypes():

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            self.PouType.Append(_(option))

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        if pou_type is not None:

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            self.PouType.SetStringSelection(_(pou_type))

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        self.RefreshLanguage()

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        self.PouNames = []

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        self.PouElementNames = []

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    def OnOK(self, event):

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        error = []

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        pou_name = self.PouName.GetValue()

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        if pou_name == "":

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            error.append(_("POU Name"))

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        if self.PouType.GetSelection() == -1:

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            error.append(_("POU Type"))

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        if self.Language.GetSelection() == -1:

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            error.append(_("Language"))

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        message = None

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        question = False

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        if len(error) > 0:

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            text = ""

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            for i, item in enumerate(error):

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                if i == 0:

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                    text += item

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                elif i == len(error) - 1:

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                    text += _(" and %s")%item

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                else:

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                    text += _(", %s")%item

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            message = _("Form isn't complete. %s must be filled!") % text

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        elif not TestIdentifier(pou_name):

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            message = _("\"%s\" is not a valid identifier!") % pou_name

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        elif pou_name.upper() in IEC_KEYWORDS:

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            message = _("\"%s\" is a keyword. It can't be used!") % pou_name

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        elif pou_name.upper() in self.PouNames:

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            message = _("\"%s\" pou already exists!") % pou_name

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        elif pou_name.upper() in self.PouElementNames:

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            message = _("A POU has an element named \"%s\". This could cause a conflict. Do you wish to continue?") % pou_name

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            question = True

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        if message is not None:

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            if question:

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                dialog = wx.MessageDialog(self, message, _("Warning"), wx.YES_NO|wx.ICON_EXCLAMATION)

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                result = dialog.ShowModal()

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                dialog.Destroy()

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                if result == wx.ID_YES:

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                    self.EndModal(wx.ID_OK)

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            else:

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                dialog = wx.MessageDialog(self, message, _("Error"), wx.OK|wx.ICON_ERROR)

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                dialog.ShowModal()

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                dialog.Destroy()

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        else:

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            self.EndModal(wx.ID_OK)

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    def RefreshLanguage(self):

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        selection = self.POU_LANGUAGES_DICT.get(self.Language.GetStringSelection(), "")

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        self.Language.Clear()

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        for language in self.POU_LANGUAGES:

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            if language != "SFC" or POU_TYPES_DICT[self.PouType.GetStringSelection()] != "function":

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                self.Language.Append(_(language))

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        if self.Language.FindString(_(selection)) != wx.NOT_FOUND:

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            self.Language.SetStringSelection(_(selection))

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    def OnTypeChanged(self, event):

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        self.RefreshLanguage()

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        event.Skip()

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    def SetPouNames(self, pou_names):

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        self.PouNames = [pou_name.upper() for pou_name in pou_names]

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    def SetPouElementNames(self, element_names):

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        self.PouElementNames = [element_name.upper() for element_name in element_names]

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    def SetValues(self, values):

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        for item, value in values.items():

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            if item == "pouName":

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                self.PouName.SetValue(value)

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            elif item == "pouType":

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                self.PouType.SetStringSelection(_(value))

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            elif item == "language":

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                self.Language.SetStringSelection(_(value))

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    def GetValues(self):

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        values = {}

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        values["pouName"] = self.PouName.GetValue()

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        values["pouType"] = POU_TYPES_DICT[self.PouType.GetStringSelection()]

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        values["language"] = self.POU_LANGUAGES_DICT[self.Language.GetStringSelection()]

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        return values