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#!/usr/bin/env python

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

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#This file is part of PLCOpenEditor, a library implementing an IEC 61131-3 editor

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#based on the plcopen standard. 

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#

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#Copyright (C) 2012: Edouard TISSERANT and Laurent BESSARD

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#

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#See COPYING file for copyrights details.

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#

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

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#modify it under the terms of the GNU General Public

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#License as published by the Free Software Foundation; either

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#version 2.1 of the License, or (at your option) any later version.

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#

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#This library 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 GNU

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#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

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

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#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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import wx

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import wx.lib.buttons

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import wx.lib.agw.customtreectrl as CT

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from PLCControler import ITEMS_VARIABLE, ITEM_CONFIGURATION, ITEM_RESOURCE, ITEM_POU

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from utils.BitmapLibrary import GetBitmap

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class PouInstanceVariablesPanel(wx.Panel):

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    def __init__(self, parent, window, controller, debug):

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        wx.Panel.__init__(self, name='PouInstanceTreePanel', 

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                parent=parent, pos=wx.Point(0, 0), 

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                size=wx.Size(0, 0), style=wx.TAB_TRAVERSAL)

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        self.ParentButton = wx.lib.buttons.GenBitmapButton(self,

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              bitmap=GetBitmap("top"), size=wx.Size(28, 28), style=wx.NO_BORDER)

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        self.ParentButton.SetToolTipString(_("Parent instance"))

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        self.Bind(wx.EVT_BUTTON, self.OnParentButtonClick, 

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                self.ParentButton)

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

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        self.Bind(wx.EVT_COMBOBOX, self.OnInstanceChoiceChanged,

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                self.InstanceChoice)

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        self.InstanceChoice.Bind(wx.EVT_LEFT_DOWN, self.OnInstanceChoiceLeftDown)

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        self.DebugButton = wx.lib.buttons.GenBitmapButton(self, 

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              bitmap=GetBitmap("debug_instance"), size=wx.Size(28, 28), style=wx.NO_BORDER)

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        self.ParentButton.SetToolTipString(_("Debug instance"))

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        self.Bind(wx.EVT_BUTTON, self.OnDebugButtonClick, 

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                self.DebugButton)

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        self.VariablesList = CT.CustomTreeCtrl(self,

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              style=wx.SUNKEN_BORDER,

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              agwStyle=CT.TR_NO_BUTTONS|

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                       CT.TR_SINGLE|

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                       CT.TR_HAS_VARIABLE_ROW_HEIGHT|

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                       CT.TR_HIDE_ROOT|

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                       CT.TR_NO_LINES|

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                       getattr(CT, "TR_ALIGN_WINDOWS_RIGHT", CT.TR_ALIGN_WINDOWS))

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        self.VariablesList.SetIndent(0)

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        self.VariablesList.SetSpacing(5)

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        self.VariablesList.DoSelectItem = lambda *x,**y:True

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        self.VariablesList.Bind(CT.EVT_TREE_ITEM_ACTIVATED,

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                self.OnVariablesListItemActivated)

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        self.VariablesList.Bind(wx.EVT_LEFT_DOWN, self.OnVariablesListLeftDown)

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        buttons_sizer = wx.FlexGridSizer(cols=3, hgap=0, rows=1, vgap=0)

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        buttons_sizer.AddWindow(self.ParentButton)

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        buttons_sizer.AddWindow(self.InstanceChoice, flag=wx.GROW)

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        buttons_sizer.AddWindow(self.DebugButton)

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        buttons_sizer.AddGrowableCol(1)

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        buttons_sizer.AddGrowableRow(0)

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

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        main_sizer.AddSizer(buttons_sizer, flag=wx.GROW)

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        main_sizer.AddWindow(self.VariablesList, flag=wx.GROW)

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        main_sizer.AddGrowableCol(0)

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        main_sizer.AddGrowableRow(1)

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        self.SetSizer(main_sizer)

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        self.ParentWindow = window

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        self.Controller = controller

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        self.Debug = debug

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        if not self.Debug:

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            self.DebugButton.Hide()

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        self.PouTagName = None

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        self.PouInfos = None

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        self.PouInstance = None

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    def __del__(self):

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        self.Controller = None

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    def SetTreeImageList(self, tree_image_list):

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        self.VariablesList.SetImageList(tree_image_list)

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    def SetController(self, controller):

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        self.Controller = controller

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        self.RefreshView()

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    def SetPouType(self, tagname, pou_instance=None):

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        self.PouTagName = tagname

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        if pou_instance is not None:

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            self.PouInstance = pou_instance

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        self.RefreshView()

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    def ResetView(self):

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        self.Controller = None

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        self.PouTagName = None

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        self.PouInfos = None

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        self.PouInstance = None

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        self.RefreshView()

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    def RefreshView(self):

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        self.VariablesList.DeleteAllItems()

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        self.InstanceChoice.Clear()

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        self.InstanceChoice.SetValue("")

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        if self.Controller is not None and self.PouTagName is not None:

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            self.PouInfos = self.Controller.GetPouVariables(self.PouTagName, self.Debug)

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        else:

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            self.PouInfos = None

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        if self.PouInfos is not None:

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            root = self.VariablesList.AddRoot("")

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            for var_infos in self.PouInfos["variables"]:

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                if var_infos.get("type", None) is not None:

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                    text = "%(name)s (%(type)s)" % var_infos

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                else:

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                    text = var_infos["name"]

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                panel = wx.Panel(self.VariablesList)

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                buttons = []

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                if var_infos["class"] in ITEMS_VARIABLE:

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                    if (var_infos["debug"] and self.Debug and

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                        (self.Controller.IsOfType(var_infos["type"], "ANY_NUM", True) or

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                         self.Controller.IsOfType(var_infos["type"], "ANY_BIT", True))):

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                        graph_button = wx.lib.buttons.GenBitmapButton(panel, 

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                              bitmap=GetBitmap("instance_graph"), 

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                              size=wx.Size(28, 28), style=wx.NO_BORDER)

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                        self.Bind(wx.EVT_BUTTON, self.GenGraphButtonCallback(var_infos), graph_button)

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                        buttons.append(graph_button)

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                elif var_infos["edit"]:

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                    edit_button = wx.lib.buttons.GenBitmapButton(panel, 

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                          bitmap=GetBitmap("edit"), 

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                          size=wx.Size(28, 28), style=wx.NO_BORDER)

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                    self.Bind(wx.EVT_BUTTON, self.GenEditButtonCallback(var_infos), edit_button)

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                    buttons.append(edit_button)

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                if var_infos["debug"] and self.Debug:

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                    debug_button = wx.lib.buttons.GenBitmapButton(panel, 

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                          bitmap=GetBitmap("debug_instance"), 

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                          size=wx.Size(28, 28), style=wx.NO_BORDER)

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                    self.Bind(wx.EVT_BUTTON, self.GenDebugButtonCallback(var_infos), debug_button)

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                    buttons.append(debug_button)

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                button_num = len(buttons)

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                if button_num > 0:

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                    panel.SetSize(wx.Size(button_num * 32, 28))

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                    panel.SetBackgroundColour(self.VariablesList.GetBackgroundColour())

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                    panel_sizer = wx.BoxSizer(wx.HORIZONTAL)

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                    panel.SetSizer(panel_sizer)

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                    for button in buttons:

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                        panel_sizer.AddWindow(button, 0, border=4, flag=wx.LEFT)

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                    panel_sizer.Layout()

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                else:

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                    panel.Destroy()

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                    panel = None

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                item = self.VariablesList.AppendItem(root, text, wnd=panel)

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                self.VariablesList.SetItemImage(item, self.ParentWindow.GetTreeImage(var_infos["class"]))

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                self.VariablesList.SetPyData(item, var_infos)

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            instances = self.Controller.SearchPouInstances(self.PouTagName, self.Debug)

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            for instance in instances:

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                self.InstanceChoice.Append(instance)

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            if len(instances) == 1:

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                self.PouInstance = instances[0]

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            if self.PouInfos["class"] in [ITEM_CONFIGURATION, ITEM_RESOURCE]:

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                self.PouInstance = None

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                self.InstanceChoice.SetSelection(0)

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            elif self.PouInstance in instances:

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                self.InstanceChoice.SetStringSelection(self.PouInstance)

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            else:

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                self.PouInstance = None

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                self.InstanceChoice.SetValue(_("Select an instance"))

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        self.RefreshButtons()

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    def RefreshButtons(self):

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        enabled = self.InstanceChoice.GetSelection() != -1

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        self.ParentButton.Enable(enabled and self.PouInfos["class"] != ITEM_CONFIGURATION)

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        self.DebugButton.Enable(enabled and self.PouInfos["debug"] and self.Debug)

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        root = self.VariablesList.GetRootItem()

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        if root is not None and root.IsOk():

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            item, item_cookie = self.VariablesList.GetFirstChild(root)

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            while item is not None and item.IsOk():

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                panel = self.VariablesList.GetItemWindow(item)

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                if panel is not None:

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                    for child in panel.GetChildren():

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                        if child.GetName() != "edit":

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                            child.Enable(enabled)

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                item, item_cookie = self.VariablesList.GetNextChild(root, item_cookie)

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    def GenEditButtonCallback(self, infos):

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        def EditButtonCallback(event):

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            var_class = infos["class"]

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            if var_class == ITEM_RESOURCE:

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                tagname = self.Controller.ComputeConfigurationResourceName(

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                    self.InstanceChoice.GetStringSelection(), 

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                    infos["name"])

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            else:

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                var_class = ITEM_POU

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                tagname = self.Controller.ComputePouName(infos["type"])

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            self.ParentWindow.EditProjectElement(var_class, tagname)

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            event.Skip()

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        return EditButtonCallback

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    def GenDebugButtonCallback(self, infos):

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        def DebugButtonCallback(event):

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            if self.InstanceChoice.GetSelection() != -1:

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                var_class = infos["class"]

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                var_path = "%s.%s" % (self.InstanceChoice.GetStringSelection(), 

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                                      infos["name"])

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                if var_class in ITEMS_VARIABLE:

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                    self.ParentWindow.AddDebugVariable(var_path, force=True)

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                else:

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                    self.ParentWindow.OpenDebugViewer(

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                        infos["class"],

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                        var_path,

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                        self.Controller.ComputePouName(infos["type"]))

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            event.Skip()

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        return DebugButtonCallback

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    def GenGraphButtonCallback(self, infos):

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        def GraphButtonCallback(event):

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            if self.InstanceChoice.GetSelection() != -1:

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                if infos["class"] in ITEMS_VARIABLE:

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                    var_path = "%s.%s" % (self.InstanceChoice.GetStringSelection(), 

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                                          infos["name"])

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                    self.ParentWindow.OpenGraphicViewer(var_path)

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            event.Skip()

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        return GraphButtonCallback

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    def ShowInstanceChoicePopup(self):

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        self.InstanceChoice.SetFocusFromKbd()

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        size = self.InstanceChoice.GetSize()

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        event = wx.MouseEvent(wx.EVT_LEFT_DOWN._getEvtType())

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        event.m_x = size.width / 2

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        event.m_y = size.height / 2

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        event.SetEventObject(self.InstanceChoice)

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        #event = wx.KeyEvent(wx.EVT_KEY_DOWN._getEvtType())

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        #event.m_keyCode = wx.WXK_SPACE

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        self.InstanceChoice.GetEventHandler().ProcessEvent(event)

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    def OnParentButtonClick(self, event):

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        if self.InstanceChoice.GetSelection() != -1:

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            parent_path = self.InstanceChoice.GetStringSelection().rsplit(".", 1)[0]

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            tagname = self.Controller.GetPouInstanceTagName(parent_path, self.Debug)

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            if tagname is not None:

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                wx.CallAfter(self.SetPouType, tagname, parent_path)

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                wx.CallAfter(self.ParentWindow.SelectProjectTreeItem, tagname)

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        event.Skip()

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    def OnInstanceChoiceChanged(self, event):

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        self.RefreshButtons()

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        event.Skip()

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    def OnDebugButtonClick(self, event):

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        if self.InstanceChoice.GetSelection() != -1:

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            self.ParentWindow.OpenDebugViewer(

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                self.PouInfos["class"],

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                self.InstanceChoice.GetStringSelection(),

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                self.PouTagName)

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        event.Skip()

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    def OnVariablesListItemActivated(self, event):

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        if self.InstanceChoice.GetSelection() != -1:

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            instance_path = self.InstanceChoice.GetStringSelection()

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            selected_item = event.GetItem()

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            if selected_item is not None and selected_item.IsOk():

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                item_infos = self.VariablesList.GetPyData(selected_item)

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                if item_infos is not None and item_infos["class"] not in ITEMS_VARIABLE:

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                    if item_infos["class"] == ITEM_RESOURCE:

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                        tagname = self.Controller.ComputeConfigurationResourceName(

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                                       instance_path, 

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                                       item_infos["name"])

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                    else:

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                        tagname = self.Controller.ComputePouName(item_infos["type"])

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                    item_path = "%s.%s" % (instance_path, item_infos["name"])

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                    wx.CallAfter(self.SetPouType, tagname, item_path)

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                    wx.CallAfter(self.ParentWindow.SelectProjectTreeItem, tagname)

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        event.Skip()

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    def OnVariablesListLeftDown(self, event):

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

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            wx.CallAfter(self.ShowInstanceChoicePopup)

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        event.Skip()

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    def OnInstanceChoiceLeftDown(self, event):

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        event.Skip()