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#!/usr/bin/env python

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

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# This file is part of Beremiz, a Integrated Development Environment for

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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.

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#

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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD

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# Copyright (C) 2017: Andrey Skvortsov <andrej.skvortzov@gmail.com>

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#

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# See COPYING file for copyrights details.

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#

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# This program is free software; you can redistribute it and/or

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# modify it under the terms of the GNU General Public License

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# as published by the Free Software Foundation; either version 2

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# of the License, or (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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# GNU General Public License for more details.

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#

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# You should have received a copy of the GNU General Public License

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# along with this program; if not, write to the Free Software

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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

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from __future__ import absolute_import

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import wx

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from graphics.GraphicCommons import CONNECTOR, CONTINUATION

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from graphics.FBD_Objects import FBD_Connector

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from dialogs.BlockPreviewDialog import BlockPreviewDialog

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# -------------------------------------------------------------------------------

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#                       Set Connection Parameters Dialog

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# -------------------------------------------------------------------------------

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class ConnectionDialog(BlockPreviewDialog):

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    """

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    Class that implements a dialog for defining parameters of a connection graphic

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    element

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    """

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    def __init__(self, parent, controller, tagname, apply_button=False):

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        """

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        Constructor

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        @param parent: Parent wx.Window of dialog for modal

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        @param controller: Reference to project controller

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        @param tagname: Tagname of project POU edited

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        @param apply_button: Enable button for applying connector modification

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        to all connector having the same name in POU (default: False)

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        """

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        BlockPreviewDialog.__init__(self, parent, controller, tagname,

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                                    title=_('Connection Properties'))

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        # Init common sizers

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        self._init_sizers(2, 0, 7, 1, 0, None)

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        # Create label for connection type

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

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        self.LeftGridSizer.AddWindow(type_label, flag=wx.GROW)

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        # Create radio buttons for selecting connection type

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        self.TypeRadioButtons = {}

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        first = True

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        for type, label in [(CONNECTOR, _('Connector')),

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                            (CONTINUATION, _('Continuation'))]:

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            radio_button = wx.RadioButton(self, label=label,

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                                          style=(wx.RB_GROUP if first else 0))

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            radio_button.SetValue(first)

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            self.Bind(wx.EVT_RADIOBUTTON, self.OnTypeChanged, radio_button)

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            self.LeftGridSizer.AddWindow(radio_button, flag=wx.GROW)

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            self.TypeRadioButtons[type] = radio_button

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            first = False

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        # Create label for connection name

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

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        self.LeftGridSizer.AddWindow(name_label, flag=wx.GROW)

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        # Create text control for defining connection name

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        self.ConnectionName = wx.TextCtrl(self)

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        self.ConnectionName.SetMinSize(wx.Size(200, -1))

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        self.Bind(wx.EVT_TEXT, self.OnNameChanged, self.ConnectionName)

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        self.LeftGridSizer.AddWindow(self.ConnectionName, flag=wx.GROW)

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        # Add preview panel and associated label to sizers

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        self.Preview.SetMinSize(wx.Size(-1, 100))

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        self.LeftGridSizer.AddWindow(self.PreviewLabel, flag=wx.GROW)

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        self.LeftGridSizer.AddWindow(self.Preview, flag=wx.GROW)

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        # Add buttons sizer to sizers

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        self.MainSizer.AddSizer(

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            self.ButtonSizer, border=20,

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

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        self.ColumnSizer.RemoveSizer(self.RightGridSizer)

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        # Add button for applying connection name modification to all connection

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        # of POU

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        if apply_button:

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            self.ApplyToAllButton = wx.Button(self, label=_("Propagate Name"))

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            self.ApplyToAllButton.SetToolTipString(

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                _("Apply name modification to all continuations with the same name"))

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            self.Bind(wx.EVT_BUTTON, self.OnApplyToAll, self.ApplyToAllButton)

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            self.ButtonSizer.AddWindow(self.ApplyToAllButton, flag=wx.LEFT)

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        else:

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            self.ConnectionName.ChangeValue(

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                controller.GenerateNewName(

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                    tagname, None, "Connection%d", 0))

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        self.Fit()

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        # Connector radio button is default control having keyboard focus

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        self.TypeRadioButtons[CONNECTOR].SetFocus()

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    def GetConnectionType(self):

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        """

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        Return type selected for connection

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        @return: Type selected (CONNECTOR or CONTINUATION)

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        """

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        return (CONNECTOR

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                if self.TypeRadioButtons[CONNECTOR].GetValue()

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                else CONTINUATION)

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    def SetValues(self, values):

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        """

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        Set default connection parameters

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        @param values: Connection parameters values

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        """

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        # For each parameters defined, set corresponding control value

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        for name, value in values.items():

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            # Parameter is connection type

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            if name == "type":

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                self.TypeRadioButtons[value].SetValue(True)

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            # Parameter is connection name

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            elif name == "name":

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                self.ConnectionName.SetValue(value)

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        # Refresh preview panel

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        self.RefreshPreview()

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    def GetValues(self):

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        """

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        Return connection parameters defined in dialog

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        @return: {parameter_name: parameter_value,...}

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        """

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        values = {

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            "type": self.GetConnectionType(),

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            "name": self.ConnectionName.GetValue()}

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        values["width"], values["height"] = self.Element.GetSize()

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        return values

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    def TestConnectionName(self):

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        """

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        Test that connection name is valid

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        @return: True if connection name is valid

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        """

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        message = None

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        # Get connection name typed by user

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        connection_name = self.ConnectionName.GetValue()

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        # Test that a name have been defined

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        if connection_name == "":

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

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        # If an error have been identify, show error message dialog

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        if message is not None:

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            self.ShowErrorMessage(message)

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            # Test failed

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            return False

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        # Return result of element name test

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        return self.TestElementName(connection_name)

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    def OnOK(self, event):

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        """

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        Called when dialog OK button is pressed

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        Test if connection name is valid

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        @param event: wx.Event from OK button

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        """

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        # Close dialog if connection name is valid

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        if self.TestConnectionName():

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            self.EndModal(wx.ID_OK)

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    def OnApplyToAll(self, event):

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        """

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        Called when Apply To All button is pressed

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        Test if connection name is valid

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        @param event: wx.Event from OK button

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        """

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        # Close dialog if connection name is valid

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        if self.TestConnectionName():

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            self.EndModal(wx.ID_YESTOALL)

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    def OnTypeChanged(self, event):

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        """

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        Called when connection type changed

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        @param event: wx.RadioButtonEvent

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        """

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        self.RefreshPreview()

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        event.Skip()

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    def OnNameChanged(self, event):

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        """

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        Called when connection name value changed

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        @param event: wx.TextEvent

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        """

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        self.RefreshPreview()

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        event.Skip()

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    def RefreshPreview(self):

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        """

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        Refresh preview panel of graphic element

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        Override BlockPreviewDialog function

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        """

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        # Set graphic element displayed, creating a FBD connection element

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        self.Element = FBD_Connector(self.Preview,

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                                     self.GetConnectionType(),

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                                     self.ConnectionName.GetValue())

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        # Call BlockPreviewDialog function

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        BlockPreviewDialog.RefreshPreview(self)