# $Id$
#
# pjsua Python GUI Demo
#
# Copyright (C)2013 Teluu Inc. (http://www.teluu.com)
#
# This program 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 of the License, or
# (at your option) any later version.
#
# This program 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 program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
#
import sys
if sys.version_info[0] >= 3: # Python 3
	import tkinter as tk
	from tkinter import ttk
	from tkinter import messagebox as msgbox
else:
	import Tkinter as tk
	import tkMessageBox as msgbox
	import ttk

import pjsua2 as pj
import log
import accountsetting
import account
import buddy
import endpoint
import settings

import os
import traceback

	
class Application(ttk.Frame):
	"""
	The Application main frame.
	"""
	def __init__(self):
		ttk.Frame.__init__(self, name='application', width=300, height=500)
		self.pack(expand='yes', fill='both')
		self.master.title('pjsua2 Demo')
		self.master.geometry('500x500+100+100')
		
		# Logger
		self.logger = log.Logger()
		
		# Accounts
		self.accList = []
		
		# GUI variables
		self.showLogWindow = tk.IntVar(value=0)
		self.quitting = False 
		
		# Construct GUI
		self._createWidgets()
		
		# Log window
		self.logWindow = log.LogWindow(self)
		self._onMenuShowHideLogWindow()
		
		# Instantiate endpoint
		self.ep = endpoint.Endpoint()
		self.ep.libCreate()
		
		# Default config
		self.appConfig = settings.AppConfig()
		self.appConfig.epConfig.uaConfig.threadCnt = 0;
		self.appConfig.epConfig.uaConfig.mainThreadOnly = True
		self.appConfig.epConfig.logConfig.writer = self.logger
		self.appConfig.epConfig.logConfig.filename = "pygui.log"
		self.appConfig.epConfig.logConfig.fileFlags = pj.PJ_O_APPEND
		self.appConfig.epConfig.logConfig.level = 5
		self.appConfig.epConfig.logConfig.consoleLevel = 5
		
	def saveConfig(self, filename='pygui.js'):
		# Save disabled accounts since they are not listed in self.accList
		disabled_accs = [ac for ac in self.appConfig.accounts if not ac.enabled]
		self.appConfig.accounts = []
		
		# Get account configs from active accounts
		for acc in self.accList:
			acfg = settings.AccConfig()
			acfg.enabled = True
			acfg.config = acc.cfg
			for bud in acc.buddyList:
				acfg.buddyConfigs.append(bud.cfg)
			self.appConfig.accounts.append(acfg)
		
		# Put back disabled accounts
		self.appConfig.accounts.extend(disabled_accs)
		# Save
		self.appConfig.saveFile(filename)
	
	def start(self, cfg_file='pygui.js'):
		# Load config
		if cfg_file and os.path.exists(cfg_file):
			self.appConfig.loadFile(cfg_file)

		self.appConfig.epConfig.uaConfig.threadCnt = 0;
		self.appConfig.epConfig.uaConfig.mainThreadOnly = True
		self.appConfig.epConfig.logConfig.writer = self.logger
		self.appConfig.epConfig.logConfig.level = 5
		self.appConfig.epConfig.logConfig.consoleLevel = 5
				
		# Initialize library
		self.appConfig.epConfig.uaConfig.userAgent = "pygui-" + self.ep.libVersion().full;
		self.ep.libInit(self.appConfig.epConfig)
		self.master.title('pjsua2 Demo version ' + self.ep.libVersion().full)
		
		# Create transports
		if self.appConfig.udp.enabled:
			self.ep.transportCreate(self.appConfig.udp.type, self.appConfig.udp.config)
		if self.appConfig.tcp.enabled:
			self.ep.transportCreate(self.appConfig.tcp.type, self.appConfig.tcp.config)
		if self.appConfig.tls.enabled:
			self.ep.transportCreate(self.appConfig.tls.type, self.appConfig.tls.config)
			
		# Add accounts
		for cfg in self.appConfig.accounts:
			if cfg.enabled:
				self._createAcc(cfg.config)
				acc = self.accList[-1]
				for buddy_cfg in cfg.buddyConfigs:
					self._createBuddy(acc, buddy_cfg)
				
		# Start library
		self.ep.libStart()
		
		# Start polling
		self._onTimer()

	def updateAccount(self, acc):
		if acc.deleting:
			return	# ignore
		iid = str(acc.randId)
		text = acc.cfg.idUri
		status = acc.statusText()
		
		values = (status,)
		if self.tv.exists(iid):
			self.tv.item(iid, text=text, values=values)
		else:
			self.tv.insert('', 'end',  iid, open=True, text=text, values=values)
		
	def updateBuddy(self, bud):
		iid = 'buddy' + str(bud.randId)
		text = bud.cfg.uri
		status = bud.statusText()
		
		values = (status,)
		if self.tv.exists(iid):
			self.tv.item(iid, text=text, values=values)
		else:
			self.tv.insert(str(bud.account.randId), 'end',  iid, open=True, text=text, values=values)
		
	def _createAcc(self, acc_cfg):
		acc = account.Account(self)
		acc.cfg = acc_cfg
		self.accList.append(acc)
		self.updateAccount(acc)
		acc.create(acc.cfg)
		acc.cfgChanged = False
		self.updateAccount(acc)
				
	def _createBuddy(self, acc, buddy_cfg):
		bud = buddy.Buddy(self)
		bud.cfg = buddy_cfg
		bud.account = acc
		bud.create(acc, bud.cfg)
		self.updateBuddy(bud)
		acc.buddyList.append(bud)

	def _createWidgets(self):
		self._createAppMenu()
		
		# Main pane, a Treeview
		self.tv = ttk.Treeview(self, columns=('Status'), show='tree')
		self.tv.pack(side='top', fill='both', expand='yes', padx=5, pady=5)

		self._createContextMenu()
		
		# Handle close event
		self.master.protocol("WM_DELETE_WINDOW", self._onClose)
	
	def _createAppMenu(self):
		# Main menu bar
		top = self.winfo_toplevel()
		self.menubar = tk.Menu()
		top.configure(menu=self.menubar)
		
		# File menu
		file_menu = tk.Menu(self.menubar, tearoff=False)
		self.menubar.add_cascade(label="File", menu=file_menu)
		file_menu.add_command(label="Add account..", command=self._onMenuAddAccount)
		file_menu.add_checkbutton(label="Show/hide log window", command=self._onMenuShowHideLogWindow, variable=self.showLogWindow)
		file_menu.add_separator()
		file_menu.add_command(label="Settings...", command=self._onMenuSettings)
		file_menu.add_command(label="Save Settings", command=self._onMenuSaveSettings)
		file_menu.add_separator()
		file_menu.add_command(label="Quit", command=self._onMenuQuit)

		# Window menu
		self.window_menu = tk.Menu(self.menubar, tearoff=False)
		self.menubar.add_cascade(label="Window", menu=self.window_menu)
		
		# Help menu
		help_menu = tk.Menu(self.menubar, tearoff=False)
		self.menubar.add_cascade(label="Help", menu=help_menu)
		help_menu.add_command(label="About", underline=2, command=self._onMenuAbout)
	
	def _showChatWindow(self, chat_inst):
		chat_inst.showWindow()
		
	def updateWindowMenu(self):
		# Chat windows
		self.window_menu.delete(0, tk.END)
		for acc in self.accList:
			for c in acc.chatList:
				cmd = lambda arg=c: self._showChatWindow(arg)
				self.window_menu.add_command(label=c.title, command=cmd)
		
	def _createContextMenu(self):
		top = self.winfo_toplevel()

		# Create Account context menu
		self.accMenu = tk.Menu(top, tearoff=False)
		# Labels, must match with _onAccContextMenu()
		labels = ['Unregister', 'Reregister', 'Add buddy...', '-',
			  'Online', 'Invisible', 'Away', 'Busy', '-',
			  'Settings...', '-',
			  'Delete...']
		for label in labels:
			if label=='-':
				self.accMenu.add_separator()
			else:
				cmd = lambda arg=label: self._onAccContextMenu(arg)
				self.accMenu.add_command(label=label, command=cmd)
		
		# Create Buddy context menu
		# Labels, must match with _onBuddyContextMenu()
		self.buddyMenu = tk.Menu(top, tearoff=False)
		labels = ['Audio call', 'Send instant message', '-',
			  'Subscribe', 'Unsubscribe', '-',
			  'Settings...', '-',
			  'Delete...']
		
		for label in labels:
			if label=='-':
				self.buddyMenu.add_separator()
			else:
				cmd = lambda arg=label: self._onBuddyContextMenu(arg)
				self.buddyMenu.add_command(label=label, command=cmd)
		
		if (top.tk.call('tk', 'windowingsystem')=='aqua'):
			self.tv.bind('<2>', self._onTvRightClick)
			self.tv.bind('<Control-1>', self._onTvRightClick)
		else:
			self.tv.bind('<3>', self._onTvRightClick)
		self.tv.bind('<Double-Button-1>', self._onTvDoubleClick)

	def _getSelectedAccount(self):
		items = self.tv.selection()
		if not items:
			return None
		try:
			iid = int(items[0])
		except:
			return None
		accs = [acc for acc in self.accList if acc.randId==iid]
		if not accs:
			return None
		return accs[0]
	
	def _getSelectedBuddy(self):
		items = self.tv.selection()
		if not items:
			return None
		try:
			iid = int(items[0][5:])
			iid_parent = int(self.tv.parent(items[0]))
		except:
			return None
			
		accs = [acc for acc in self.accList if acc.randId==iid_parent]
		if not accs:
			return None
			
		buds = [b for b in accs[0].buddyList if b.randId==iid]
		if not buds:
			return None
			
		return buds[0]
	
	def _onTvRightClick(self, event):
		iid = self.tv.identify_row(event.y)
		#iid = self.tv.identify('item', event.x, event.y)
		if iid:
			self.tv.selection_set( (iid,) )
			acc = self._getSelectedAccount()
			if acc:
				self.accMenu.post(event.x_root, event.y_root)
			else:
				# A buddy is selected
				self.buddyMenu.post(event.x_root, event.y_root)
	
	def _onTvDoubleClick(self, event):
		iid = self.tv.identify_row(event.y)
		if iid:
			self.tv.selection_set( (iid,) )
			acc = self._getSelectedAccount()
			if acc:
				self.cfgChanged = False
				dlg = accountsetting.Dialog(self.master, acc.cfg)
				if dlg.doModal():
					self.updateAccount(acc)
					acc.modify(acc.cfg)
			else:
				bud = self._getSelectedBuddy()
				acc = bud.account
				chat = acc.findChat(bud.cfg.uri)
				if not chat:
					chat = acc.newChat(bud.cfg.uri)
				chat.showWindow()
	
	def _onAccContextMenu(self, label):
		acc = self._getSelectedAccount()
		if not acc:
			return
		
		if label=='Unregister':
			acc.setRegistration(False)
		elif label=='Reregister':
			acc.setRegistration(True)
		elif label=='Online':
			ps = pj.PresenceStatus()
			ps.status = pj.PJSUA_BUDDY_STATUS_ONLINE
			acc.setOnlineStatus(ps)
		elif label=='Invisible':
			ps = pj.PresenceStatus()
			ps.status = pj.PJSUA_BUDDY_STATUS_OFFLINE
			acc.setOnlineStatus(ps)
		elif label=='Away':
			ps = pj.PresenceStatus()
			ps.status = pj.PJSUA_BUDDY_STATUS_ONLINE
			ps.activity = pj.PJRPID_ACTIVITY_AWAY
			ps.note = "Away"
			acc.setOnlineStatus(ps)
		elif label=='Busy':
			ps = pj.PresenceStatus()
			ps.status = pj.PJSUA_BUDDY_STATUS_ONLINE
			ps.activity = pj.PJRPID_ACTIVITY_BUSY
			ps.note = "Busy"
			acc.setOnlineStatus(ps)
		elif label=='Settings...':
			self.cfgChanged = False
			dlg = accountsetting.Dialog(self.master, acc.cfg)
			if dlg.doModal():
				self.updateAccount(acc)
				acc.modify(acc.cfg)
		elif label=='Delete...':
			msg = "Do you really want to delete account '%s'?" % acc.cfg.idUri
			if msgbox.askquestion('Delete account?', msg, default=msgbox.NO) != u'yes':
				return
			iid = str(acc.randId)
			self.accList.remove(acc)
			acc.setRegistration(False)
			acc.deleting = True
			del acc
			self.tv.delete( (iid,) )
		elif label=='Add buddy...':
			cfg = pj.BuddyConfig()
			dlg = buddy.SettingDialog(self.master, cfg)
			if dlg.doModal():
				self._createBuddy(acc, cfg)
		else:
			assert not ("Unknown menu " + label)
	
	def _onBuddyContextMenu(self, label):
		bud = self._getSelectedBuddy()
		if not bud:
			return
		acc = bud.account
			
		if label=='Audio call':
			chat = acc.findChat(bud.cfg.uri)
			if not chat: chat = acc.newChat(bud.cfg.uri)
			chat.showWindow()
			chat.startCall()
		elif label=='Send instant message':
			chat = acc.findChat(bud.cfg.uri)
			if not chat: chat = acc.newChat(bud.cfg.uri)
			chat.showWindow(True)
		elif label=='Subscribe':
			bud.subscribePresence(True)
		elif label=='Unsubscribe':
			bud.subscribePresence(False)
		elif label=='Settings...':
			subs = bud.cfg.subscribe
			uri  = bud.cfg.uri
			dlg = buddy.SettingDialog(self.master, bud.cfg)
			if dlg.doModal():
				self.updateBuddy(bud)
				# URI updated?
				if uri != bud.cfg.uri:
					cfg = bud.cfg
					# del old
					iid = 'buddy' + str(bud.randId)
					acc.buddyList.remove(bud)
					del bud
					self.tv.delete( (iid,) )
					# add new
					self._createBuddy(acc, cfg)
				# presence subscribe setting updated
				elif subs != bud.cfg.subscribe:
					bud.subscribePresence(bud.cfg.subscribe)
		elif label=='Delete...':
			msg = "Do you really want to delete buddy '%s'?" % bud.cfg.uri
			if msgbox.askquestion('Delete buddy?', msg, default=msgbox.NO) != u'yes':
				return
			iid = 'buddy' + str(bud.randId)
			acc.buddyList.remove(bud)
			del bud
			self.tv.delete( (iid,) )
		else:
			assert not ("Unknown menu " + label)
			
	def _onTimer(self):
		if not self.quitting:
			self.ep.libHandleEvents(10)
			if not self.quitting:
				self.master.after(50, self._onTimer)
			
	def _onClose(self):
		self.saveConfig()
		self.quitting = True
		self.ep.libDestroy()
		self.ep = None
		self.update()
		self.quit()
		
	def _onMenuAddAccount(self):
		cfg = pj.AccountConfig()
		dlg = accountsetting.Dialog(self.master, cfg)
		if dlg.doModal():
			self._createAcc(cfg)
			
	def _onMenuShowHideLogWindow(self):
		if self.showLogWindow.get():
			self.logWindow.deiconify()
		else:
			self.logWindow.withdraw()
	
	def _onMenuSettings(self):
		dlg = settings.Dialog(self, self.appConfig)
		if dlg.doModal():
			msgbox.showinfo(self.master.title(), 'You need to restart for new settings to take effect')
	
	def _onMenuSaveSettings(self):
		self.saveConfig()
		
	def _onMenuQuit(self):
		self._onClose()

	def _onMenuAbout(self):
		msgbox.showinfo(self.master.title(), 'About')
		

class ExceptionCatcher:
	"""Custom Tk exception catcher, mainly to display more information 
	   from pj.Error exception
	""" 
	def __init__(self, func, subst, widget):
		self.func = func 
		self.subst = subst
		self.widget = widget
	def __call__(self, *args):
		try:
			if self.subst:
				args = apply(self.subst, args)
			return apply(self.func, args)
		except pj.Error, error:
			print 'Exception:'
			print '  ', error.info()
			print 'Traceback:'
			print traceback.print_stack()
			log.writeLog2(1, 'Exception: ' + error.info() + '\n')
		except Exception, error:
			print 'Exception:'
			print '  ', str(error)
			print 'Traceback:'
			print traceback.print_stack()
			log.writeLog2(1, 'Exception: ' + str(error) + '\n')

def main():
	#tk.CallWrapper = ExceptionCatcher
	app = Application()
	app.start()
	app.mainloop()
		
if __name__ == '__main__':
	main()