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

#   This file is part of emesene.
#
#    Emesene 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.
#
#    emesene 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 emesene; if not, write to the Free Software
#    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

import gtk
import pango
import gobject
import time

from urllib import quote
from warnings import warn

import emesenelib
from emesenecommon import MAX_MESSAGE_LENGTH
import dialog
import abstract.stock as stock

import ConversationUI
import FileTransfer

class CustomEmoticons(object): # FIXME: wtf?
    def __init__(self):
        self.emoticons = {}
        
    def setNew(self, user, shortcut, id):
        if user != None: user = user.lower()
        if self.emoticons.has_key(user):
            self.emoticons[user].update({shortcut:id})
        else:
            self.emoticons.update({user:{shortcut:id}})
        
    def get(self, user=None):
        if user != None: user = user.lower()
        if self.emoticons.has_key(user):
            return self.emoticons[ user ]
        else:
            return []

class Conversation(gobject.GObject):
    '''This class is an abstraction of a conversation, it is used to separate
    the data from the GUI in a conversation to let us have single and tabbed
    windows with the same codebase (also MVC is good :P)'''

    def __init__(self, controller, switchboard):
        '''Constructor'''
        gobject.GObject.__init__(self)

        self.callbackIdList = []
        self.P2PSignals = {}
        
        self.ui = None
        self.switchboard = None
        self.setSwitchboard(switchboard)
        msn = switchboard.msn
        self.controller = controller
        self.parser = controller.unifiedParser
        self.config = controller.config
        self.title = ""
        
        self.lastMessageMail = '' # the mail of the user who sent the last message
        self.isCurrent = False # if True this is the tab that has the focus
        self.closed = False
        self.textBuffer = gtk.TextBuffer()
        self.autoreplySent = False # if true we allready sent the autoreply message
        self.inputText = ''
        self.theme = controller.theme
        self.parentConversationWindow = None
        
        msn.connect('user-attr-changed', self.onUserAttrChanged)
        msn.connect('custom-emoticon-transfered', self.onCustomEmoticonTransfered)
        
        #TODO: from now on this signals will be emitted by conversation window or conversationUI
        controller.connect('color-changed', self.onColorChanged)
        controller.connect('font-changed', self.onFontChanged)
        
        self.ui = ConversationUI.ConversationUI(self.controller, self)
        self.customEmoticons = CustomEmoticons()
        self.parser = self.controller.unifiedParser
       
        self.sendOffline = False
        self.lastSpeaker = ''
        self.user = switchboard.user
        
        self.transfers = []
    
    def onFtInvite(self, p2p, session, context, sender):
        ft = FileTransfer.FileTransfer(self.controller, p2p, self, session,
            context, sender)
        self.transfers.append(ft)
        self.ui.transfers.add(ft)
        self.ui.transfers.show_all()
    
    def sendFile(self, path):
        '''This sends a file'''
        # TODO: handle multichat
        p2p = self.controller.msn.p2p[self.switchboard.firstUser]
        sender = emesenelib.msn_p2p.FTSender(p2p, path)
        self.onFtInvite(p2p, sender.session_id, sender.context, 'Me')
    
    def getSwitchboard(self):
        return self.switchboard
        
    def close(self):
        '''close the tab'''
        self.parentConversationWindow.closeTab(self)
        self.setClosed(True)
        
    def onColorChanged(self, controller, colorStr):
        self.config.user['fontColor'] = colorStr
        self.ui.input.applyAttrsToInput()
    
    def onFontChanged(self, controller, font, bold, italic, size):
        self.setFont(font, italic, bold, size)
        
        self.ui.input.toolbar.setFontBold(bold)
        self.ui.input.toolbar.setFontItalic(italic)
        
        self.ui.input.applyAttrsToInput()
        
    def onUserAttrChanged(self, msnp, contact):
        if contact.email in self.getMembers() and \
           self.isCurrent and self.parentConversationWindow:
            
            win = self.parentConversationWindow
            win.update_title()
            
            if not self.config.user['avatarsInTaskbar']:
                win.set_icon(self.getWindowIcon())

    def getStatusIcon(self):
        '''returns the status icon for this conversation'''
        members = self.getMembers()
        theme = self.controller.theme
        user = None
        
        if len(members) > 1: 
            return theme.getImage('groupChat')
        if len(members) == 0:
            return theme.getImage('userPanel')
        
        user = self.controller.getContact(members[0])
        if not user:
            return theme.getImage('userPanel')
        return theme.statusToPixbuf(user.status)

    def getWindowIcon(self):
        '''returns the window icon for this conversation'''
        members = self.getMembers()
        user = None
        
        if len(members) == 1:
            user = self.controller.getContact(members[0])
            
        if user and self.config.user['avatarsInTaskbar'] and \
                self.controller.theme.hasUserDisplayPicture(user):
            return self.controller.theme.getUserDisplayPicture(user, 64, 64)
        return self.getStatusIcon()

    def getFontColor(self):
        '''return the user color'''
        return self.config.user['fontColor']

    def setFont(self, font, italic=False, bold=False, size=10):
        '''set the font of the user text'''
        self.config.user['fontFace'] = font
        self.config.user['fontItalic'] = italic
        self.config.user['fontBold'] = bold
        self.config.user['fontSize'] = size
    
    def getTitle(self):
        '''return a title according to the users in the conversation'''
        if not self.controller:
            return self.title

        members = self.getMembers()
        if len(members) > 1:
            self.title = _('Group chat')
        elif len(members) == 1:
            if self.config.user['useAliasIfAvailable']:
                title = self.controller.contacts.get_alias(members[0])
            if not title:
                title = self.controller.contacts.get_nick(members[0])

            if title:
                self.title = title

        return self.title

    def getUser(self):
        '''return the (local) user mail'''
        return self.switchboard.user
        
    def getRTL(self, message):
        '''check whether it's an right-to-left string'''
        try:
            if pango.find_base_dir(message, -1) == pango.DIRECTION_RTL:
                return '1'
        finally:
            return '0'

    def getStyle(self, message=''):
        '''return the style string to use in the sendMessage method'''

        effectValue = ''

        if self.config.user['fontBold']:
            effectValue += 'B'

        if self.config.user['fontItalic']:
            effectValue += 'I'

        if self.config.user['fontUnderline']:
            effectValue += 'U'
        
        if self.config.user['fontStrike']:
            effectValue += 'S'

        color = self.config.user['fontColor'].replace('#', '')
        color = color[ 4:6 ] + color[ 2:4 ] + color[ :2 ]
        
        face = self.config.user['fontFace'].replace(' ', '%20')

        return "X-MMS-IM-Format: FN=" + face + \
            "; EF=" + effectValue + "; CO=" + color + \
            "; PF=0;RL=" + self.getRTL(message)

    def getId(self):
        '''return the id of the switchboard'''
        return self.switchboard.getId()

    def getOnlineUsers(self):
        '''This method returns a list ol mails of the contacts who are not offline'''
        return self.switchboard.getOnlineUsers()

    def invite(self, mail):
        '''invite a user to the conversation'''
        self.switchboard.invite(mail)

    def getMembers(self):
        '''return a list of the members in the conversation'''
        members = self.switchboard.getMembers()
        if len(members) != 0: return members

        members = self.switchboard.getInvitedMembers()
        if len(members) != 0: return members
        
        return [self.switchboard.firstUser]

    def getWindow(self):
        '''return the window that hold this conversation'''
        return self.parentConversationWindow

    def setWindow(self, window):
        '''set the window that hold this conversation'''

        self.parentConversationWindow = window

    def setIsCurrent(self, current):
        '''set the isCurrent attribute, if true, this conversation
        is the tab that is shown'''
        self.isCurrent = current

    def getIsCurrent(self):
        '''return the value of isCurrent'''
        return self.isCurrent

    def receiveNudge(self, switchboard, mail):
        '''This method is called when a nudge is received in the
        switchboard'''
        nick = self.controller.msn.getUserDisplayName(mail)
        self.appendOutputText(None, _("%s just sent you a nudge!")% \
          self.parser.getParser(nick).get(False), 'information')
        self.doMessageWaiting(mail)

    def receiveOIM(self, nick, message, date):
        '''This method is called when a offline message is received'''
        self.appendOutputText(nick, message, 'offline_incoming', \
            timestamp=time.mktime(date))
        self.doMessageWaiting('')
        
    def receiveError(self, msnp, to, message, error):
        '''This method is called when a error message is received'''
        self.appendOutputText('Error', "Can\'t send message (%s)\n%s" % \
            (error, message), 'error')
        self.doMessageWaiting('')

    def onReceiveMessage(self, switchboard, mail, nick, message,
                         format, charset):
        '''This method is called when a message is received in the switchboard'''
        self.controller.conversationManager.emit('receive-message', self, \
            mail, nick, message, format, charset)

    def onInkMessage(self, switchboard, mail, filename):
        '''This method is called when an ink message is received
        in the switchboard'''

        self.doMessageWaiting(mail)
        self.appendOutputText(mail, quote(filename), 'ink_incoming')

    def doMessageWaiting(self, mail):
        win = self.parentConversationWindow
        if win and (not win.has_toplevel_focus() or not self.isCurrent):
            self.ui.setMessageWaiting(mail)
            self.parentConversationWindow.setUrgency()
            self.parentConversationWindow.show()
        else:
            self.ui.setDefault(mail)
        
    def do_receive_message(self, mail, nick, message, format, charset):
        '''This method is called when a message is received
        in the switchboard'''

        self.doMessageWaiting(mail)
        
        if self.config.user['autoReply'] and not self.autoreplySent:
            msg = self.config.user['autoReplyMessage']

            # no gettext here, it's a semi standard way
            # to identify automessages
            self.switchboard.sendMessage('AutoMessage: ' + msg)
            self.appendOutputText(None, 'AutoMessage: %s\n' % msg, \
                'information')
            self.autoreplySent = True
        
        if message is not None:
            self.appendOutputText(mail, message, 'incoming', \
                self.parseFormat(mail, format))

    def userJoin(self, switchboard, mail):
        '''This method is called when someone joins the conversation'''
        if switchboard.isGroupChat():
            nick = self.controller.msn.getUserDisplayName(mail)
            nick = self.parser.getParser(nick).get(False)
            self.appendOutputText('', \
                _("%s has joined the conversation") % nick, 'information')
       
        if self.isCurrent:
            self.parentConversationWindow.update_title()
            self.parentConversationWindow.set_icon(self.getWindowIcon())
        
        if self.ui:
            self.ui.update()

    def userLeave(self, switchboard, mail):
        '''method called when someone leaves the conversation'''
        nick = self.controller.msn.getUserDisplayName(mail)
        nick = self.parser.getParser(nick).get(False)
        self.appendOutputText('', _("%s has left the conversation")%nick, \
            'information')
        
        if self.isCurrent:
            self.parentConversationWindow.update_title()
            self.parentConversationWindow.set_icon(self.getWindowIcon())
        
        if self.ui:
            self.ui.update()
        
    def sbStatusChange(self, switchboard):
        if self.ui:
            self.ui.update()

    def inviteUser(self, mail):
        '''method called when the user selects a friend in the invite dialog'''
        if self.switchboard.status == 'closed':
            self.reconnect()

        self.invite(mail) 
        self.ui.messageWaiting[mail] = False
        self.ui.contactTyping[mail] = False
        self.ui.update()

    def doNudge(self):
        '''this method is called when the user clicks the nudge button'''
        if self.switchboard.status == 'closed':
            self.reconnect()

        try:
            self.switchboard.sendNudge()
        except Exception:
            self.reconnect()
            self.switchboard.sendNudge()

        self.appendOutputText(None, _("you have sent a nudge!"), 'information')

    def reconnect(self):
        '''reconnect the switchboard'''
        if not self.controller or not self.controller.msn:
            return

        user = self.getMembers()[0]
        self.setSwitchboard(self.controller.msn.getSwitchboard(user))
        self.autoreplySent = False

    def splitMessage(self, message):
        '''Split large messages'''
        messageChunks = []
        messageLen = len(message)
        msgStart = 0
        while msgStart < messageLen:
            chunk = message[msgStart:msgStart+MAX_MESSAGE_LENGTH]
            chunkLen = len(chunk)
            if chunkLen == MAX_MESSAGE_LENGTH:
                chunkEnd = chunk.rfind(' ')
                if chunkEnd!=-1 and chunkEnd>0:
                    messageChunks.append(chunk[0:chunkEnd])
                    msgStart += chunkEnd+1
                else:
                    msgStart += chunkLen
                    messageChunks.append(chunk)
            else:
                msgStart += chunkLen
                messageChunks.append(chunk)
        return messageChunks

    def do_send_message(self, message, retry=0):
        '''Send the message from the UI input. This chooses between OIM and
        switchboard to send the message.'''
        
        remoteMail = self.switchboard.firstUser
        remoteStatus = self.controller.contacts.get_status(remoteMail)

        def do_send_offline(response, mail, message):
            '''callback for the confirm dialog asking to send offline 
            message'''
            if response == stock.YES:
                self.sendOffline = True
                self.switchboard.msn.msnOIM.send(mail, message)
                self.appendOutputText(self.user, message, 'outgoing')
        
        if self.switchboard.status == 'error' and remoteStatus == 'FLN':
            
            if self.sendOffline == True:
                do_send_offline(stock.YES, remoteMail, message)
            else:
                dialog.yes_no(
                 _("Are you sure you want to send a offline message to %s") %\
                 remoteMail, do_send_offline, remoteMail, message)

            return
            
        if self.switchboard.status == 'closed':
            self.reconnect()

        messageChunks = self.splitMessage(message)
        for chunk in messageChunks:
            try:
                self.switchboard.sendCustomEmoticons(chunk)
                self.switchboard.sendMessage(chunk, self.getStyle(chunk))
                self.appendOutputText(self.user, chunk, 'outgoing')
            except Exception, e:
                raise
                print str(e)
                self.reconnect()
                if retry < 3:
                    self.do_send_message(
                        ''.join(messageChunks[messageChunks.index(chunk):]), \
                        retry + 1)
                else:
                    self.appendOutputText(None, _('Can\'t send message'), \
                        'information')
                return

    def sendMessage(self, message):
        '''send a message to the conversation'''
        self.controller.conversationManager.emit('send-message', self, message)
            
    def sendIsTyping(self):
        '''an easy method to send the is typing message'''
        if self.switchboard.status == 'closed':
            self.reconnect()

        try:
            self.switchboard.sendIsTyping()
        except Exception:
            self.reconnect()
            self.sendIsTyping()

    def parseFormat(self, mail, format):
        '''parse the format of a mail and return the style'''

        # if the useFriendsUnifiedFormat flag is set, then return that format

        if self.config.user['useFriendsUnifiedFormat']:
            font = self.config.user['friendsUnifiedFont']
            color = self.config.user['friendsUnifiedColor']
            return 'font-family: ' + emesenelib.common.escape(font) + \
                ';color: ' + emesenelib.common.escape(color) + ';'

        # FN=Sans; EF=; CO=000000; PF=0
     
        style = ''
     
        if format.find("FN=") != -1:
            font = format.split('FN=')[1].split(';')[0].replace('%20', ' ')
            style += 'font-family: ' + emesenelib.common.escape(font) + ';'

        if format.find("CO=") != -1:
            color = format.split('CO=')[1].split(';')[0]
                 
            if len(color) == 3:
                color = color[2] + color[1] + color[0]
                style += 'color: #' + emesenelib.common.escape(color) + ';'
            else:
                color = color.zfill(6)
                
            if len(color) == 6:
                color = color[4:6] + color[2:4] + color[:2]
                style += 'color: #' + emesenelib.common.escape(color) + ';'

        if format.find("EF=") != -1:
            effect = set(format.split('EF=')[1].split(';')[0])

            if "B" in effect: style += 'font-weight: bold;'
            if "I" in effect: style += 'font-style: italic;'
            if "U" in effect: style += 'text-decoration: underline;'
            if "S" in effect: style += 'text-decoration: line-through;'
        
        return style

    def setSwitchboard(self, switchboard):
        '''set a new switchboard for the conversation.
        useful if the conversation is closed
        and the other user starts a new one'''

        signalDict = {
            'nudge': self.receiveNudge,
            'message': self.onReceiveMessage,
            'ink-message': self.onInkMessage,
            'user-join': self.userJoin,
            'user-leave': self.userLeave,
            'typing': self.receiveTyping,
            'custom-emoticon-received': self.onCustomEmoticonReceived,
        }
        
        if self.switchboard:
            # disconnect old stuff
            
            while len(self.callbackIdList) > 0:
                self.switchboard.disconnect(self.callbackIdList.pop())
            
            if self.switchboard.msn:
                for mail in self.P2PSignals.keys():
                    self.switchboard.msn.p2p[mail].disconnect(\
                        self.P2PSignals.pop(mail))

        if switchboard is None:
            # the function was called just to disconnect everything
            return

        # connect new switchboard
        self.switchboard = switchboard

        for signalName in signalDict.keys():
            self.callbackIdList.append(self.switchboard.connect(signalName, \
                signalDict[signalName]))
        
        for mail in switchboard.getMembers():
            self.P2PSignals[mail] = switchboard.msn.p2p[mail].connect(\
                'file-transfer-invite', self.onFtInvite)
        
        self.autoreplySent = False

    def onCustomEmoticonReceived(self, switchboard, shortcut, msnobj):
        '''call when a smiley is received'''
        self.customEmoticons.setNew(msnobj.creator, shortcut, msnobj.sha1d)
        
    def onCustomEmoticonTransfered(self, switchboard, to, msnobj, path):
        '''call when a smiley is transfered'''
        if self.ui:
            self.ui.textview.setCustomObject(msnobj.sha1d, path, \
                type='application/x-emesene-emoticon')

    def appendOutputText(self, username, text, type, style = None, timestamp = None):
        '''append the given text to the outputBuffer'''
        
        if type.startswith('ink_'):
            type = type[4:]
            ink = True
        else:
            ink = False
        
        if type != 'incoming' and type != 'outgoing':
            self.lastSpeaker = ''
        elif username == self.lastSpeaker:
            type = 'consecutive_' + type
        
        self.lastSpeaker = username
        
        if username == self.switchboard.user:
            nick = emesenelib.common.escape(self.controller.msn.nick)
        elif username != None:
            nick = emesenelib.common.escape( \
                self.controller.msn.getUserDisplayName(username))
        else:
            nick = ''

        if timestamp is None:
            timestamp = time.time()

        displayedText = self.controller.conversationLayoutManager.layout(\
            username, text, style, self, type, timestamp, ink)

        try:
            self.ui.textview.display_html(displayedText.encode('ascii', \
                'xmlcharrefreplace'))
        except Exception, e:
            print 'error trying to display "' + displayedText + '"' 
            print e

        self.ui.scrollToBottom()              

    def getStatus(self):
        return self.switchboard.status

    def setStatus(self, value):
        self.switchboard.setStatus(value)

    def isClosed(self):
        return self.closed

    def setClosed(self, value):
        self.closed = value
        if value == True:
            self.switchboard.leaveChat()
            self.setSwitchboard(None)
    
    def receiveTyping(self, switchboard, mail):
        '''This method is called when a is typing message is received in the
        switchboard'''
        if self.ui:
            self.ui.setTyping(mail)

    def getMembersDict(self):
        '''return a dict with email as key and contact instance as value'''
        
        userDict = {}
        for mail in self.getMembers():
            contact = self.controller.getContact(mail)
            if contact:
                userDict[mail] = contact
        
        return userDict
        
    def getTextTag(self):
        '''return a text tag from the current style'''
        
        tag = gtk.TextTag()
        
        if self.config.user['disableFormat']:
            return tag
        
        tag.set_property('font', self.config.user['fontFace'])
        tag.set_property('size-points', self.config.user['fontSize'])
        tag.set_property("foreground" , self.config.user['fontColor'])
        
        if self.config.user['fontBold']:
            tag.set_property("weight" , pango.WEIGHT_BOLD)
        
        if self.config.user['fontItalic']:
            tag.set_property("style" , pango.STYLE_ITALIC)
        
        if self.config.user['fontUnderline']:
            tag.set_property("underline-set" , True)
            tag.set_property("underline" , pango.UNDERLINE_SINGLE)
        else:
            #XXX: wtf is that underline-set=True?
            tag.set_property("underline-set" , True)
            tag.set_property("underline" , pango.UNDERLINE_NONE)
            
        tag.set_property("strikethrough" , self.config.user['fontStrike'])
               
        return tag
        
gobject.type_register(Conversation)
