##	tabbed_chat_window.py
##
## Gajim Team:
##	- Yann Le Boulanger <asterix@lagaule.org>
##	- Vincent Hanquez <tab@snarc.org>
##	- Nikos Kouremenos <kourem@gmail.com>
##
##	Copyright (C) 2003-2005 Gajim Team
##
## 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; version 2 only.
##
## 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.
##

import gtk
import gtk.glade
import pango
import gobject
import time
import urllib
import base64

import dialogs
import chat

from common import gajim
from common import helpers
from common import i18n

_ = i18n._
APP = i18n.APP
gtk.glade.bindtextdomain(APP, i18n.DIR)
gtk.glade.textdomain(APP)

GTKGUI_GLADE = 'gtkgui.glade'

class TabbedChatWindow(chat.Chat):
	"""Class for tabbed chat window"""
	def __init__(self, user, plugin, account):
		chat.Chat.__init__(self, plugin, account, 'tabbed_chat_window')
		self.users = {}
		self.chatstates = {}
		# keep check for possible paused timeouts per jid
		self.possible_paused_timeout_id = {}
		# keep check for possible inactive timeouts per jid
		self.possible_inactive_timeout_id = {}
		self.new_user(user)
		self.show_title()
		self.xml.signal_connect('on_tabbed_chat_window_destroy',
			self.on_tabbed_chat_window_destroy)
		self.xml.signal_connect('on_tabbed_chat_window_delete_event',
			self.on_tabbed_chat_window_delete_event)
		self.xml.signal_connect('on_tabbed_chat_window_focus_in_event',
			self.on_tabbed_chat_window_focus_in_event)
		self.xml.signal_connect('on_tabbed_chat_window_focus_out_event',
			self.on_tabbed_chat_window_focus_out_event)
		self.xml.signal_connect('on_tabbed_chat_window_button_press_event',
			self.on_chat_window_button_press_event)
		self.xml.signal_connect('on_chat_notebook_key_press_event',
			self.on_chat_notebook_key_press_event)
		self.xml.signal_connect('on_chat_notebook_switch_page',
			self.on_chat_notebook_switch_page)

		if gajim.config.get('saveposition'):
			# get window position and size from config
			self.window.move(gajim.config.get('chat-x-position'),
					gajim.config.get('chat-y-position'))
			self.window.resize(gajim.config.get('chat-width'),
					gajim.config.get('chat-height'))

		self.window.show_all()

	def save_var(self, jid):
		'''return the specific variable of a jid, like gpg_enabled
		the return value have to be compatible with wthe one given to load_var'''
		gpg_enabled = self.xmls[jid].get_widget('gpg_togglebutton').get_active()
		return {'gpg_enabled': gpg_enabled}
	
	def load_var(self, jid, var):
		if not self.xmls.has_key(jid):
			return
		self.xmls[jid].get_widget('gpg_togglebutton').set_active(
			var['gpg_enabled'])
		
	def draw_widgets(self, contact):
		"""draw the widgets in a tab (status_image, contact_button ...)
		according to the the information in the contact variable"""
		jid = contact.jid
		self.set_state_image(jid)
		contact_button = self.xmls[jid].get_widget('contact_button')
		contact_button.set_use_underline(False)
		tb = self.xmls[jid].get_widget('gpg_togglebutton')
		if contact.keyID: # we can do gpg
			tb.set_sensitive(True)
			tt = _('OpenPGP Encryption')
		else:
			tb.set_sensitive(False)
			tt = _('%s has not broadcasted an OpenPGP key nor you have assigned one') % contact.name
		tip = gtk.Tooltips()
		tip.set_tip(self.xmls[jid].get_widget('gpg_eventbox'), tt)

		# add the fat line at the top
		self.draw_name_banner(contact.name, jid)

	def draw_name_banner(self, name, jid):
		'''Draw the fat line at the top of the window that 
		houses the status icon, name, jid, and avatar'''
		# this is the text for the big brown bar
		# some chars need to be escaped.. this fixes '&'
		name = name.replace('&', '&amp;')

		#FIXME: uncomment me when we support sending messages to specific resource
		# composing full jid
		#fulljid = jid
		#if self.users[jid].resource:
		#	fulljid += '/' + self.users[jid].resource
		#label_text = '<span weight="heavy" size="x-large">%s</span>\n%s' \
		#	% (name, fulljid)
		
		label_text = '<span weight="heavy" size="x-large">%s</span>\n%s' \
			% (name, jid)

		# setup the label that holds name and jid
		banner_name_label = self.xmls[jid].get_widget('banner_name_label')
		banner_name_label.set_markup(label_text)
		self.paint_banner(jid)

	def set_avatar(self, vcard):
		if not vcard.has_key('PHOTO'):
			return
		if type(vcard['PHOTO']) != type({}):
			return
		img_decoded = None
		if vcard['PHOTO'].has_key('BINVAL'):
			try:
				img_decoded = base64.decodestring(vcard['PHOTO']['BINVAL'])
			except:
				pass
		elif vcard[i].has_key('EXTVAL'):
			url = vcard[i]['EXTVAL']
			try:
				fd = urllib.urlopen(url)
				img_decoded = fd.read()
			except:
				pass
		if img_decoded:
			pixbufloader = gtk.gdk.PixbufLoader()
			pixbufloader.write(img_decoded)
			pixbuf = pixbufloader.get_pixbuf()
			pixbufloader.close()
			scaled_buf = pixbuf.scale_simple(52, 52, gtk.gdk.INTERP_HYPER)
			image = self.xmls[vcard['jid']].get_widget('avatar_image')
			image.set_from_pixbuf(scaled_buf)
			image.show_all()

	def set_state_image(self, jid):
		prio = 0
		if gajim.contacts[self.account].has_key(jid):
			list_users = gajim.contacts[self.account][jid]
		else:
			list_users = [self.users[jid]]
		user = list_users[0]
		show = user.show
		jid = user.jid
		keyID = user.keyID
		for u in list_users:
			if u.priority > prio:
				prio = u.priority
				show = u.show
				keyID = u.keyID
		child = self.childs[jid]
		status_image = self.notebook.get_tab_label(child).get_children()[0]
		state_images = self.plugin.roster.get_appropriate_state_images(jid)
		image = state_images[show]
		banner_status_image = self.xmls[jid].get_widget('banner_status_image')
		if keyID:
			self.xmls[jid].get_widget('gpg_togglebutton').set_sensitive(True)
		else:
			self.xmls[jid].get_widget('gpg_togglebutton').set_sensitive(False)
		if image.get_storage_type() == gtk.IMAGE_ANIMATION:
			banner_status_image.set_from_animation(image.get_animation())
			status_image.set_from_animation(image.get_animation())
		elif image.get_storage_type() == gtk.IMAGE_PIXBUF:
			# make a copy because one will be scaled, one not (tab icon)
			pix = image.get_pixbuf()
			scaled_pix = pix.scale_simple(32, 32, gtk.gdk.INTERP_BILINEAR)
			banner_status_image.set_from_pixbuf(scaled_pix)
			status_image.set_from_pixbuf(pix)

	def on_tabbed_chat_window_delete_event(self, widget, event):
		"""close window"""
		for jid in self.users:
			if time.time() - gajim.last_message_time[self.account][jid] < 2:
				# 2 seconds
				dialog = dialogs.ConfirmationDialog(
					_('You just received a new message from "%s"' % jid),
					_('If you close the window, this message will be lost.'))
				if dialog.get_response() != gtk.RESPONSE_OK:
					return True #stop the propagation of the event

		if gajim.config.get('saveposition'):
			# save the window size and position
			x, y = self.window.get_position()
			gajim.config.set('chat-x-position', x)
			gajim.config.set('chat-y-position', y)
			width, height = self.window.get_size()
			gajim.config.set('chat-width', width)
			gajim.config.set('chat-height', height)

	def on_tabbed_chat_window_destroy(self, widget):
		#clean self.plugin.windows[self.account]['chats']
		chat.Chat.on_window_destroy(self, widget, 'chats')

	def on_tabbed_chat_window_focus_in_event(self, widget, event):
		chat.Chat.on_chat_window_focus_in_event(self, widget, event)
		# on focus in, send 'active' chatstate
		self.send_chatstate('active')

	def on_tabbed_chat_window_focus_out_event(self, widget, event):
		gobject.timeout_add(500, self.check_window_state, widget)

	def check_window_state(self, widget):
		''' we want: "minimized" or "focus-out"
		not "focus-out, minimized" or "focus-out" '''
		widget.realize()
		new_state = widget.window.get_state()
		if new_state & gtk.gdk.WINDOW_STATE_ICONIFIED:
			print 'iconify'
			self.send_chatstate('inactive')
		else:
			print 'just focus-out'
			self.send_chatstate('paused')

	def on_chat_notebook_key_press_event(self, widget, event):
		chat.Chat.on_chat_notebook_key_press_event(self, widget, event)

	def on_send_button_clicked(self, widget):
		"""When send button is pressed: send the current message"""
		jid = self.get_active_jid()
		message_textview = self.xmls[jid].get_widget('message_textview')
		message_buffer = message_textview.get_buffer()
		start_iter = message_buffer.get_start_iter()
		end_iter = message_buffer.get_end_iter()
		message = message_buffer.get_text(start_iter, end_iter, 0)

		# send the message
		self.send_message(message)

		message_buffer.set_text('')

	def remove_tab(self, jid):
		if time.time() - gajim.last_message_time[self.account][jid] < 2:
			dialog = dialogs.ConfirmationDialog(
				_('You just received a new message from "%s"' % jid),
				_('If you close this tab, the message will be lost.'))
			if dialog.get_response() != gtk.RESPONSE_OK:
				return

		# chatstates - window is destroyed, send gone
		self.send_chatstate('gone')
		
		chat.Chat.remove_tab(self, jid, 'chats')
		if len(self.xmls) > 0:
			del self.users[jid]

	def new_user(self, contact):
		'''when new tab is created'''
		self.names[contact.jid] = contact.name
		self.xmls[contact.jid] = gtk.glade.XML(GTKGUI_GLADE, 'chats_vbox', APP)
		self.childs[contact.jid] = self.xmls[contact.jid].get_widget('chats_vbox')
		self.users[contact.jid] = contact

		if contact.jid in gajim.encrypted_chats[self.account]:
			self.xmls[contact.jid].get_widget('gpg_togglebutton').set_active(True)
		
		xm = gtk.glade.XML(GTKGUI_GLADE, 'tabbed_chat_popup_menu', APP)
		xm.signal_autoconnect(self)
		self.tabbed_chat_popup_menu = xm.get_widget('tabbed_chat_popup_menu')
		
		chat.Chat.new_tab(self, contact.jid)
		self.redraw_tab(contact.jid)
		self.draw_widgets(contact)
		
		uf_show = helpers.get_uf_show(contact.show)
		s = _('%s is %s') % (contact.name, uf_show)
		if contact.status:
			s += ' (' + contact.status + ')'
		self.print_conversation(s, contact.jid, 'status')

		#restore previous conversation
		self.restore_conversation(contact.jid)

		#print queued messages
		if gajim.awaiting_messages[self.account].has_key(contact.jid):
			self.read_queue(contact.jid)

		gajim.connections[self.account].request_vcard(contact.jid)
		self.childs[contact.jid].show_all()

		# chatstates
		self.kbd_activity_in_last_5_secs = False
		self.mouse_over_in_last_5_secs = False
		self.mouse_over_in_last_30_secs = False
		self.kbd_activity_in_last_30_secs = False
		
		self.chatstates[contact.jid] = None # our current chatstate with contact
		self.possible_paused_timeout_id[contact.jid] =\
			gobject.timeout_add(5000, self.check_for_possible_paused_chatstate,
				contact)
		self.possible_inactive_timeout_id[contact.jid] =\
			gobject.timeout_add(30000, self.check_for_possible_inactive_chatstate,
				contact)
		
	def check_for_possible_paused_chatstate(self, contact):
		''' did we move mouse of that window or kbd activity in that window
		if yes we go active if not already
		if no we go paused if not already '''
		current_state = self.chatstates[contact.jid]
		if current_state == False: # he doesn't support chatstates
			return False # stop looping
		
		print 'mouse', self.mouse_over_in_last_5_secs
		print 'kbd', self.kbd_activity_in_last_5_secs
		
		if self.mouse_over_in_last_5_secs:
			self.send_chatstate('active')
		elif self.kbd_activity_in_last_5_secs:
			self.send_chatstate('composing')
		else:
			self.send_chatstate('paused')
		
		# assume no activity and let the motion-notify or key_press make them True
		self.mouse_over_in_last_5_secs = False
		self.kbd_activity_in_last_5_secs = False
		
		# refresh 30 seconds or else it's 30 - 5 = 25 seconds!
		self.mouse_over_in_last_30_secs = True
		self.kbd_activity_in_last_30_secs = True
		
		return True # loop forever

	def check_for_possible_inactive_chatstate(self, contact):
		''' did we move mouse over that window or kbd activity in that window
		if yes we go active if not already
		if no we go inactive if not already '''
		current_state = self.chatstates[contact.jid]
		if current_state == False: # he doesn't support chatstates
			return False # stop looping
		
		if self.mouse_over_in_last_30_secs:
			self.send_chatstate('active')
		elif self.kbd_activity_in_last_30_secs:
			self.send_chatstate('composing')
		else:
			self.send_chatstate('inactive')

		# assume no activity and let the motion-notify or key_press make them True
		self.mouse_over_in_last_5_secs = False
		self.kbd_activity_in_last_5_secs = False
		
		self.mouse_over_in_last_30_secs = False
		self.kbd_activity_in_last_30_secs = False
		
		return True # loop forever

	def on_message_textview_key_press_event(self, widget, event):
		"""When a key is pressed:
		if enter is pressed without the shift key, message (if not empty) is sent
		and printed in the conversation"""
		self.kbd_activity_in_last_5_secs = True
		self.kbd_activity_in_last_30_secs = True
		jid = self.get_active_jid()
		conversation_textview = self.xmls[jid].get_widget('conversation_textview')
		message_buffer = widget.get_buffer()
		start_iter, end_iter = message_buffer.get_bounds()
		message = message_buffer.get_text(start_iter, end_iter, False)

		if event.keyval == gtk.keysyms.ISO_Left_Tab: # SHIFT + TAB
			if event.state & gtk.gdk.CONTROL_MASK: # CTRL + SHIFT + TAB
				self.notebook.emit('key_press_event', event)
		if event.keyval == gtk.keysyms.Tab:
			if event.state & gtk.gdk.CONTROL_MASK: # CTRL + TAB
				self.notebook.emit('key_press_event', event)
		elif event.keyval == gtk.keysyms.Page_Down: # PAGE DOWN
			if event.state & gtk.gdk.CONTROL_MASK: # CTRL + PAGE DOWN
				self.notebook.emit('key_press_event', event)
			elif event.state & gtk.gdk.SHIFT_MASK: # SHIFT + PAGE DOWN
				conversation_textview.emit('key_press_event', event)
		elif event.keyval == gtk.keysyms.Page_Up: # PAGE UP
			if event.state & gtk.gdk.CONTROL_MASK: # CTRL + PAGE UP
				self.notebook.emit('key_press_event', event)
			elif event.state & gtk.gdk.SHIFT_MASK: # SHIFT + PAGE UP
				conversation_textview.emit('key_press_event', event)
		elif event.keyval == gtk.keysyms.Return or \
			event.keyval == gtk.keysyms.KP_Enter: # ENTER
			if gajim.config.get('send_on_ctrl_enter'): 
				if not (event.state & gtk.gdk.CONTROL_MASK):
					return False
			elif (event.state & gtk.gdk.SHIFT_MASK):
					return False
			if gajim.connections[self.account].connected < 2: #we are not connected
				dialogs.ErrorDialog(_("A connection is not available"),
					_("Your message can't be sent until you are connected.")).get_response()
				return True

			# send the message
			self.send_message(message)

			message_buffer.set_text('')
			return True
		elif event.keyval == gtk.keysyms.Up:
			if event.state & gtk.gdk.CONTROL_MASK: #Ctrl+UP
				self.sent_messages_scroll(jid, 'up', widget.get_buffer())
				return True # override the default gtk+ thing for ctrl+up
		elif event.keyval == gtk.keysyms.Down:
			if event.state & gtk.gdk.CONTROL_MASK: #Ctrl+Down
				self.sent_messages_scroll(jid, 'down', widget.get_buffer())
				return True # override the default gtk+ thing for ctrl+down
			
		else:
			# chatstates
			# if composing, send chatstate
			self.send_chatstate('composing')

	def send_chatstate(self, state):
		''' sends our chatstate to the current tab only if new chatstate
		is different for the previous one'''
		# please read jep-85 to get an idea of this
		# we keep track of jep85 support by the peer by three extra states:
		# None, False and 'ask'
		# None if no info about peer
		# False if peer does not support jep85
		# 'ask' if we sent 'active' chatstate and are waiting for reply

		# do not send nothing if we have chat state notifications disabled
		if not gajim.config.get('send_chat_state_notifications'):
			return

		jid = self.get_active_jid()

		if self.chatstates[jid] == False:
			return

		# if current state equals last state, return
		if self.chatstates[jid] == state:
			return

		if self.chatstates[jid] is None:
			# state = 'ask'
			# send and return
			return

		if self.chatstates[jid] == 'ask':
			return
		
		# if last state was composing, don't send active
		if self.chatstates[jid] == 'composing' and state == 'active':
			return
			
		# if we're inactive prevent paused (inactive is stronger)
		if self.chatstates[jid] == 'inactive' and state == 'paused':
			return
		
		# if we're inactive prevent paused (inactive is stronger)
		if self.chatstates[jid] == 'inactive' and state == 'composing':
			return

		self.chatstates[jid] = state
		gajim.connections[self.account].send_message(jid, None, None,
			chatstate = state)
		
		
	def send_message(self, message):
		"""Send the message given to the active tab"""
		if not message:
			return
		jid = self.get_active_jid()
		conversation_textview = self.xmls[jid].get_widget('conversation_textview')
		message_textview = self.xmls[jid].get_widget('message_textview')
		message_buffer = message_textview.get_buffer()
		if message != '' or message != '\n':
			self.save_sent_message(jid, message)
			if message == '/clear':
				self.on_clear(None, conversation_textview) # clear conversation
				self.on_clear(None, message_textview) # clear message textview too
				return True
			elif message == '/compact':
				self.set_compact_view(not self.compact_view_current_state)
				self.on_clear(None, message_textview)
				return True
			keyID = ''
			encrypted = False
			if self.xmls[jid].get_widget('gpg_togglebutton').get_active():
				keyID = self.users[jid].keyID
				encrypted = True

			# chatstates - if no info about peer, discover
			if self.chatstates[jid] is None:
				gajim.connections[self.account].send_message(jid, message, keyID,
					chatstate = 'active')
				self.chatstates[jid] = 'ask'

			# if peer supports jep85, send 'active'
			elif self.chatstates[jid] != False:
				#send active chatstate on every message (as JEP says)
				gajim.connections[self.account].send_message(jid, message, keyID,
					chatstate = 'active')
			else: # just send the message
				gajim.connections[self.account].send_message(jid, message, keyID)
			
			message_buffer.set_text('')
			self.print_conversation(message, jid, jid, encrypted = encrypted)

	def on_contact_button_clicked(self, widget):
		jid = self.get_active_jid()
		contact = self.users[jid]
		self.plugin.roster.on_info(widget, contact, self.account)

	def read_queue(self, jid):
		"""read queue and print messages containted in it"""
		l = gajim.awaiting_messages[self.account][jid]
		user = self.users[jid]
		for event in l:
			self.print_conversation(event[0], jid, tim = event[1],
				encrypted = event[2])
			self.plugin.roster.nb_unread -= 1
		self.plugin.roster.show_title()
		del gajim.awaiting_messages[self.account][jid]
		self.plugin.roster.draw_contact(jid, self.account)
		if self.plugin.systray_enabled:
			self.plugin.systray.remove_jid(jid, self.account)
		showOffline = gajim.config.get('showoffline')
		if (user.show == 'offline' or user.show == 'error') and \
			not showOffline:
			if len(gajim.contacts[self.account][jid]) == 1:
				self.plugin.roster.really_remove_user(user, self.account)

	def print_conversation(self, text, jid, contact = '', tim = None,
		encrypted = False, subject = None):
		"""Print a line in the conversation:
		if contact is set to status: it's a status message
		if contact is set to another value: it's an outgoing message
		if contact is not set: it's an incomming message"""
		user = self.users[jid]
		if contact == 'status':
			kind = 'status'
			name = ''
		else:
			ec = gajim.encrypted_chats[self.account]
			if encrypted and jid not in ec:
				msg = _('Encryption enabled')
				chat.Chat.print_conversation_line(self, msg, jid,
					'status', '', tim)
				ec.append(jid)
			if not encrypted and jid in ec:
				msg = _('Encryption disabled')
				chat.Chat.print_conversation_line(self, msg, jid,
					'status', '', tim)
				ec.remove(jid)
			self.xmls[jid].get_widget('gpg_togglebutton').set_active(encrypted)
			if contact:
				kind = 'outgoing'
				name = gajim.nicks[self.account] 
			else:
				kind = 'incoming'
				name = user.name

		chat.Chat.print_conversation_line(self, text, jid, kind, name, tim,
			subject = subject)

	def restore_conversation(self, jid):
		# don't restore lines if it's a transport
		is_transport = jid.startswith('aim') or jid.startswith('gadugadu') or\
			jid.startswith('irc') or jid.startswith('icq') or\
			jid.startswith('msn') or jid.startswith('sms') or\
			jid.startswith('yahoo')

		if is_transport:
			return	

		#How many lines to restore and when to time them out
		restore	= gajim.config.get('restore_lines')
		time_out = gajim.config.get('restore_timeout')
		pos		= 0	#position, while reading from history
		size		= 0	#how many lines we alreay retreived
		lines		= []	#we'll need to reverse the lines from history
		count		= gajim.logger.get_nb_line(jid)


		if gajim.awaiting_messages[self.account].has_key(jid):
			pos = len(gajim.awaiting_messages[self.account][jid])
		else:
			pos = 0

		now = time.time()
		while size <= restore:
			if pos == count or size > restore - 1:
				#don't try to read beyond history, not read more than required
				break
			
			nb, line = gajim.logger.read(jid, count - 1 - pos, count - pos)
			pos = pos + 1

			if (now - float(line[0][0]))/60 >= time_out:
				#stop looking for messages if we found something too old
				break

			if line[0][1] != 'sent' and line[0][1] != 'recv':
				# we don't want to display status lines, do we?
				continue

			lines.append(line[0])
			size = size + 1

		lines.reverse()
		
		for msg in lines:
			if msg[1] == 'sent':
				kind = 'outgoing'
				name = gajim.nicks[self.account]
			elif msg[1] == 'recv':
				kind = 'incoming'
				name = self.users[jid].name

			tim = time.localtime(float(msg[0]))

			text = ':'.join(msg[2:])[:-1] #remove the latest \n
			self.print_conversation_line(text, jid, kind, name, tim,
				['small'], ['small', 'grey'], ['small', 'grey'], False)

		if len(lines):
			self.print_empty_line(jid)