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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

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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 os

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import sys

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import shutil

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from xml.dom import minidom

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import wx

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import util.paths as paths

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from py_ext import PythonFileCTNMixin

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class WxGladeHMI(PythonFileCTNMixin):

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    ConfNodeMethods = [

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        {

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            "bitmap":    "editWXGLADE",

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            "name":    _("WXGLADE GUI"),

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            "tooltip": _("Edit a WxWidgets GUI with WXGlade"),

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            "method":   "_editWXGLADE"

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        },

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    ]

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    def GetIconName(self):

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        return "wxGlade"

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    def ConfNodePath(self):

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        return paths.AbsDir(__file__)

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    def _getWXGLADEpath(self, project_path=None):

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        if project_path is None:

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            project_path = self.CTNPath()

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        # define name for wxGlade gui file

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        return os.path.join(project_path, "hmi.wxg")

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    def GetWxGladePath(self):

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        path = None

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        try:

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            from wxglade import __file__ as fileName

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            path = os.path.dirname(fileName)

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            return path

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        except ImportError:

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            pass

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        defLibDir = "/usr/share/wxglade"

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        if os.path.isdir(defLibDir):

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            path = defLibDir

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        return path

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    def launch_wxglade(self, options, wait=False):

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        path = self.GetWxGladePath()

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        glade = os.path.join(path, 'wxglade.py')

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        if wx.Platform == '__WXMSW__':

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            glade = "\"%s\"" % glade

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        mode = {False: os.P_NOWAIT, True: os.P_WAIT}[wait]

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        os.spawnv(mode, sys.executable, ["\"%s\"" % sys.executable] + [glade] + options)

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    def OnCTNSave(self, from_project_path=None):

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        if from_project_path is not None:

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            shutil.copyfile(self._getWXGLADEpath(from_project_path),

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                            self._getWXGLADEpath())

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        return PythonFileCTNMixin.OnCTNSave(self, from_project_path)

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    def CTNGenerate_C(self, buildpath, locations):

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        # list containing description of all objects declared in wxglade

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        hmi_objects = []

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        # list containing only description of the main frame object 

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        main_frames = []

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        wxgfile_path = self._getWXGLADEpath()

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        if os.path.exists(wxgfile_path):

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            wxgfile = open(wxgfile_path, 'r')

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            wxgtree = minidom.parse(wxgfile)

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            wxgfile.close()

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            for node in wxgtree.childNodes[1].childNodes:

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                if node.nodeType == wxgtree.ELEMENT_NODE:

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                    name = node.getAttribute("name")

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                    wxglade_object_desc = {

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                        "name": name,

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                        "class": node.getAttribute("class"),

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                        "handlers": [

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                            hnode.firstChild.data for hnode in

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                            node.getElementsByTagName("handler")]}

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                    hmi_objects.append(wxglade_object_desc)

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                    if name == self.CTNName() :

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                        main_frames.append(wxglade_object_desc)

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            hmipyfile_path = os.path.join(self._getBuildPath(), "hmi.py")

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            if wx.Platform == '__WXMSW__':

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                wxgfile_path = "\"%s\"" % wxgfile_path

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                wxghmipyfile_path = "\"%s\"" % hmipyfile_path

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            else:

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                wxghmipyfile_path = hmipyfile_path

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            self.launch_wxglade(['-o', wxghmipyfile_path, '-g', 'python', wxgfile_path], wait=True)

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            hmipyfile = open(hmipyfile_path, 'r')

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            define_hmi = hmipyfile.read().decode('utf-8')

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            hmipyfile.close()

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        else:

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            define_hmi = ""

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        declare_hmi = "\n".join(["%(name)s = None\n" % x for x in main_frames])

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        declare_hmi += "\n".join(["\n".join(["%(class)s.%(h)s = %(h)s" %

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                                            dict(x, h=h) for h in x['handlers']])

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                                 for x in hmi_objects])

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        global_hmi = ("global %s\n" % ",".join(

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            [x["name"] for x in main_frames]) if len(main_frames) > 0 else "")

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        init_hmi = "\n".join(["""\

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def OnCloseFrame(evt):

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    wx.MessageBox(_("Please stop PLC to close"))

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%(name)s = %(class)s(None)

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%(name)s.Bind(wx.EVT_CLOSE, OnCloseFrame)

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%(name)s.Show()

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""" % x for x in main_frames])

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        cleanup_hmi = "\n".join(

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            ["if %(name)s is not None: %(name)s.Destroy()" % x

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             for x in main_frames])

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        self.PreSectionsTexts = {

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            "globals": define_hmi,

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            "start":   global_hmi,

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            "stop":    global_hmi + cleanup_hmi

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        }

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        self.PostSectionsTexts = {

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            "globals": declare_hmi,

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            "start":   init_hmi,

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        }

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        if len(main_frames) == 0 and \

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           len(getattr(self.CodeFile, "start").getanyText().strip()) == 0:

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                self.GetCTRoot().logger.write_warning(

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                    _("Warning: WxGlade HMI has no object with name identical to extension name, and no python code is provided in start section to create object.\n"))

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        return PythonFileCTNMixin.CTNGenerate_C(self, buildpath, locations)

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    def _editWXGLADE(self):

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        wxg_filename = self._getWXGLADEpath()

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        open_wxglade = True

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        if not self.GetCTRoot().CheckProjectPathPerm():

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            dialog = wx.MessageDialog(self.GetCTRoot().AppFrame,

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                                      _("You don't have write permissions.\nOpen wxGlade anyway ?"),

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                                      _("Open wxGlade"),

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                                      wx.YES_NO | wx.ICON_QUESTION)

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            open_wxglade = dialog.ShowModal() == wx.ID_YES

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            dialog.Destroy()

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        if open_wxglade:

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            if not os.path.exists(wxg_filename):

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                hmi_name = self.BaseParams.getName()

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                open(wxg_filename, "w").write("""<?xml version="1.0"?>

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    <application path="" name="" class="" option="0" language="python" top_window="%(name)s" encoding="UTF-8" use_gettext="0" overwrite="0" use_new_namespace="1" for_version="2.8" is_template="0">

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        <object class="%(class)s" name="%(name)s" base="EditFrame">

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            <style>wxDEFAULT_FRAME_STYLE</style>

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            <title>frame_1</title>

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            <object class="wxBoxSizer" name="sizer_1" base="EditBoxSizer">

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                <orient>wxVERTICAL</orient>

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            <object class="sizerslot" />

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        </object>

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        </object>

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    </application>

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    """ % {"name": hmi_name, "class": "Class_%s" % hmi_name})

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            if wx.Platform == '__WXMSW__':

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                wxg_filename = "\"%s\"" % wxg_filename

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            self.launch_wxglade([wxg_filename])