# -*- 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 library 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 2.1 of the License, or (at your option) any later version.
#
#This library 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 library; if not, write to the Free Software
#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import socket
import wx
import  wx.lib.mixins.listctrl  as  listmix
from Zeroconf import *

import connectors

class AutoWidthListCtrl(wx.ListCtrl, listmix.ListCtrlAutoWidthMixin):
    def __init__(self, parent, id, name, pos=wx.DefaultPosition,
                 size=wx.DefaultSize, style=0):
        wx.ListCtrl.__init__(self, parent, id, pos, size, style, name=name)
        listmix.ListCtrlAutoWidthMixin.__init__(self)

[ID_DISCOVERYDIALOG, ID_DISCOVERYDIALOGSTATICTEXT1, 
 ID_DISCOVERYDIALOGSERVICESLIST, ID_DISCOVERYDIALOGREFRESHBUTTON, 
 ID_DISCOVERYDIALOGLOCALBUTTON, 
] = [wx.NewId() for _init_ctrls in range(5)]

class DiscoveryDialog(wx.Dialog, listmix.ColumnSorterMixin):
    
    def _init_coll_MainSizer_Items(self, parent):
        parent.AddWindow(self.staticText1, 0, border=20, flag=wx.TOP|wx.LEFT|wx.RIGHT|wx.GROW)
        parent.AddWindow(self.ServicesList, 0, border=20, flag=wx.LEFT|wx.RIGHT|wx.GROW)
        parent.AddSizer(self.ButtonGridSizer, 0, border=20, flag=wx.LEFT|wx.RIGHT|wx.BOTTOM|wx.GROW)
        
    def _init_coll_MainSizer_Growables(self, parent):
        parent.AddGrowableCol(0)
        parent.AddGrowableRow(1)
    
    def _init_coll_ButtonGridSizer_Items(self, parent):
        parent.AddWindow(self.RefreshButton, 0, border=0, flag=0)
        parent.AddWindow(self.LocalButton, 0, border=0, flag=0)
        parent.AddSizer(self.ButtonSizer, 0, border=0, flag=0)
        
    def _init_coll_ButtonGridSizer_Growables(self, parent):
        parent.AddGrowableCol(0)
        parent.AddGrowableCol(1)
        parent.AddGrowableRow(1)
    
    def _init_sizers(self):
        self.MainSizer = wx.FlexGridSizer(cols=1, hgap=0, rows=3, vgap=10)
        self.ButtonGridSizer = wx.FlexGridSizer(cols=3, hgap=5, rows=1, vgap=0)
        
        self._init_coll_MainSizer_Items(self.MainSizer)
        self._init_coll_MainSizer_Growables(self.MainSizer)
        self._init_coll_ButtonGridSizer_Items(self.ButtonGridSizer)
        self._init_coll_ButtonGridSizer_Growables(self.ButtonGridSizer)
        
        self.SetSizer(self.MainSizer)
    
    def _init_ctrls(self, prnt):
        wx.Dialog.__init__(self, id=ID_DISCOVERYDIALOG, 
              name='DiscoveryDialog', parent=prnt,  
              size=wx.Size(600, 600), style=wx.DEFAULT_DIALOG_STYLE,
              title='Service Discovery')
        
        self.staticText1 = wx.StaticText(id=ID_DISCOVERYDIALOGSTATICTEXT1,
              label=_('Services available:'), name='staticText1', parent=self,
              pos=wx.Point(0, 0), size=wx.DefaultSize, style=0)
        
        # Set up list control
        self.ServicesList = AutoWidthListCtrl(id=ID_DISCOVERYDIALOGSERVICESLIST,
              name='ServicesList', parent=self, pos=wx.Point(0, 0), size=wx.Size(0, 0), 
              style=wx.LC_REPORT|wx.LC_EDIT_LABELS|wx.LC_SORT_ASCENDING|wx.LC_SINGLE_SEL)
        self.ServicesList.InsertColumn(0, 'NAME')
        self.ServicesList.InsertColumn(1, 'TYPE')
        self.ServicesList.InsertColumn(2, 'IP')
        self.ServicesList.InsertColumn(3, 'PORT')
        self.ServicesList.SetColumnWidth(0, 150)
        self.ServicesList.SetColumnWidth(1, 150)
        self.ServicesList.SetColumnWidth(2, 150)
        self.ServicesList.SetColumnWidth(3, 150)
        self.Bind(wx.EVT_LIST_ITEM_SELECTED, self.OnItemSelected, id=ID_DISCOVERYDIALOGSERVICESLIST)
        self.Bind(wx.EVT_LIST_ITEM_ACTIVATED, self.OnItemActivated, id=ID_DISCOVERYDIALOGSERVICESLIST)
        
        listmix.ColumnSorterMixin.__init__(self, 4)
        
        self.RefreshButton = wx.Button(id=ID_DISCOVERYDIALOGREFRESHBUTTON,
              label=_('Refresh'), name='RefreshButton', parent=self,
              pos=wx.Point(0, 0), size=wx.DefaultSize, style=0)
        self.Bind(wx.EVT_BUTTON, self.OnRefreshButton, id=ID_DISCOVERYDIALOGREFRESHBUTTON)
        
        self.LocalButton = wx.Button(id=ID_DISCOVERYDIALOGLOCALBUTTON,
              label=_('Local'), name='LocalButton', parent=self,
              pos=wx.Point(0, 0), size=wx.DefaultSize, style=0)
        self.Bind(wx.EVT_BUTTON, self.OnLocalButton, id=ID_DISCOVERYDIALOGLOCALBUTTON)
        
        self.ButtonSizer = self.CreateButtonSizer(wx.OK|wx.CANCEL|wx.CENTER)
        
        self._init_sizers()
        
    def __init__(self, parent):
        self._init_ctrls(parent)
        
        self.itemDataMap = {}
        self.nextItemId = 0
        
        self.URI = None
        self.Browsers = []
        
        self.ZeroConfInstance = Zeroconf()
        self.RefreshList()
        
    def __del__(self):
        for browser in self.Browsers:
            browser.cancel()
        self.ZeroConfInstance.close()
        
    def RefreshList(self):
        for browser in self.Browsers:
            browser.cancel()
        
        self.Browsers = []
        for t in connectors.dnssd_connectors.keys():
            self.Browsers.append(ServiceBrowser(self.ZeroConfInstance, t, self))

    def OnRefreshButton(self, event):
        self.ServicesList.DeleteAllItems()
        self.RefreshList()

    def OnLocalButton(self, event):
        self.URI = "LOCAL://"
        self.EndModal(wx.ID_OK)
        event.Skip()

    # Used by the ColumnSorterMixin, see wx/lib/mixins/listctrl.py
    def GetListCtrl(self):
        return self.ServicesList

    def getColumnText(self, index, col):
        item = self.ServicesList.GetItem(index, col)
        return item.GetText()

    def OnItemSelected(self, event):
        self.SetURI(event.m_itemIndex)
        event.Skip()

    def OnItemActivated(self, event):
        self.SetURI(event.m_itemIndex)
        self.EndModal(wx.ID_OK)
        event.Skip()

    def SetURI(self, idx):
        connect_type = self.getColumnText(idx, 1)
        connect_address = self.getColumnText(idx, 2)
        connect_port = self.getColumnText(idx, 3)
        
        self.URI = "%s://%s:%s"%(connect_type, connect_address, connect_port)

    def GetURI(self):
        return self.URI
        
    def removeService(self, zeroconf, type, name):
        '''
        called when a service with the desired type goes offline.
        '''
        
        # loop through the list items looking for the service that went offline
        for idx in xrange(self.ServicesList.GetItemCount()):
            # this is the unique identifier assigned to the item
            item_id = self.ServicesList.GetItemData(idx)

            # this is the full typename that was received by addService
            item_name = self.itemDataMap[item_id][4]

            if item_name == name:
                self.ServicesList.DeleteItem(idx)
                break
        
    def addService(self, zeroconf, type, name):
        '''
        called when a service with the desired type is discovered.
        '''
        info = self.ZeroConfInstance.getServiceInfo(type, name)

        svcname  = name.split(".")[0]
        typename = type.split(".")[0][1:]
        ip       = str(socket.inet_ntoa(info.getAddress()))
        port     = info.getPort()

        num_items = self.ServicesList.GetItemCount()

        # display the new data in the list
        new_item = self.ServicesList.InsertStringItem(num_items, svcname)
        self.ServicesList.SetStringItem(new_item, 1, "%s" % typename)
        self.ServicesList.SetStringItem(new_item, 2, "%s" % ip)
        self.ServicesList.SetStringItem(new_item, 3, "%s" % port)

        # record the new data for the ColumnSorterMixin
        # we assign every list item a unique id (that won't change when items
        # are added or removed)
        self.ServicesList.SetItemData(new_item, self.nextItemId)
 
        # the value of each column has to be stored in the itemDataMap
        # so that ColumnSorterMixin knows how to sort the column.

        # "name" is included at the end so that self.removeService
        # can access it.
        self.itemDataMap[self.nextItemId] = [ svcname, typename, ip, port, name ]

        self.nextItemId += 1