# use unicode encoding for all literals by default (for python2.x)
from __future__ import unicode_literals

__author__ = "Steffen Vogel"
__copyright__ = "Copyright 2015-2017, Steffen Vogel"
__license__ = "GPLv3"
__maintainer__ = "Steffen Vogel"
__email__ = "post@steffenvogel.de"

"""
 This file is part of transWhat

 transWhat 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 3 of the License, or
 any later version.

 transwhat 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 transWhat. If not, see <http://www.gnu.org/licenses/>.
"""

from Spectrum2.backend import SpectrumBackend
from Spectrum2 import protocol_pb2

from session import Session
from registersession import RegisterSession

import logging


class WhatsAppBackend(SpectrumBackend):
	def __init__(self, io, spectrum_jid, specConf):
		SpectrumBackend.__init__(self)
		self.logger = logging.getLogger(self.__class__.__name__)
		self.io = io
		self.specConf = specConf
		self.sessions = { }
		self.spectrum_jid = spectrum_jid
		# Used to prevent duplicate messages
		self.lastMsgId = {}

		self.logger.debug("Backend started")

	# RequestsHandlers
	def handleLoginRequest(self, user, legacyName, password, extra):
		self.logger.debug("handleLoginRequest(user=%s, legacyName=%s)" % (user, legacyName))
		# Key word means we should register a new password
		if password == 'register':
			if user not in self.sessions:
				self.sessions[user] = RegisterSession(self, user, legacyName, extra)
		else:
			if user not in self.sessions:
				self.sessions[user] = Session(self, user, legacyName, extra)

		self.sessions[user].login(password)

	def handleLogoutRequest(self, user, legacyName):
		self.logger.debug("handleLogoutRequest(user=%s, legacyName=%s)" % (user, legacyName))
		if user in self.sessions:
			self.sessions[user].logout()
			del self.sessions[user]

	def handleMessageSendRequest(self, user, buddy, message, xhtml="", ID=""):
		self.logger.debug("handleMessageSendRequest(user=%s, buddy=%s, message=%s, xhtml=%s, ID=%s)" %
				    ( user, buddy, message, xhtml, ID))
		# For some reason spectrum occasionally sends to identical messages to
		# a buddy, one to the bare jid and one to the /bot resource. This
		# causes duplicate messages. Thus we should not send consecutive
		# messages with the same id
		if ID == '':
			self.sessions[user].sendMessageToWA(buddy, message, ID, xhtml)
		elif user not in self.lastMsgId or self.lastMsgId[user] != ID:
			self.sessions[user].sendMessageToWA(buddy, message, ID, xhtml)
			self.lastMsgId[user] = ID

	def handleJoinRoomRequest(self, user, room, nickname, pasword):
		self.logger.debug("handleJoinRoomRequest(user=%s, room=%s, nickname=%s)" % (user, room, nickname))
		self.sessions[user].joinRoom(room, nickname)

	def handleLeaveRoomRequest(self, user, room):
		self.logger.debug("handleLeaveRoomRequest(user=%s, room=%s)" % (user, room))
		self.sessions[user].leaveRoom(room)

	def handleStatusChangeRequest(self, user, status, statusMessage):
		self.logger.debug("handleStatusChangeRequest(user=%s, status=%d, statusMessage=%s)" % (user, status, statusMessage))
		self.sessions[user].changeStatusMessage(statusMessage)
		self.sessions[user].changeStatus(status)

	def handleBuddies(self, buddies):
		"""Called when user logs in. Used to initialize roster."""
		self.logger.debug("handleBuddies(buddies=%s)" % buddies)
		buddies = [b for b in buddies.buddy]
		if len(buddies) > 0:
			user = buddies[0].userName
			self.sessions[user].loadBuddies(buddies)

	def handleBuddyUpdatedRequest(self, user, buddy, nick, groups):
		self.logger.debug("handleBuddyUpdatedRequest(user=%s, buddy=%s, nick=%s, groups=%s)" % (user, buddy, nick, groups))
		self.sessions[user].updateBuddy(buddy, nick, groups)

	def handleBuddyRemovedRequest(self, user, buddy, groups):
		self.logger.debug("handleBuddyRemovedRequest(user=%s, buddy=%s, groups=%s)" % (user, buddy, groups))
		self.sessions[user].removeBuddy(buddy)

	def handleTypingRequest(self, user, buddy):
		self.logger.debug("handleTypingRequest(user=%s, buddy=%s)" % (user, buddy))
		self.sessions[user].sendTypingStarted(buddy)

	def handleTypedRequest(self, user, buddy):
		self.logger.debug("handleTypedRequest(user=%s, buddy=%s)" % (user, buddy))
		self.sessions[user].sendTypingStopped(buddy)

	def handleStoppedTypingRequest(self, user, buddy):
		self.logger.debug("handleStoppedTypingRequest(user=%s, buddy=%s)" % (user, buddy))
		self.sessions[user].sendTypingStopped(buddy)

	def handleVCardRequest(self, user, buddy, ID):
		self.logger.debug("handleVCardRequest(user=%s, buddy=%s, ID=%s)" % (user, buddy, ID))
		self.sessions[user].requestVCard(buddy, ID)

	def handleVCardUpdatedRequest(self, user, photo, nickname):
		self.logger.debug("handleVCardUpdatedRequest(user=%s, nickname=%s)" % (user, nickname))
		self.sessions[user].setProfilePicture(photo)

	def handleBuddyBlockToggled(self, user, buddy, blocked):
		self.logger.debug("handleBuddyBlockedToggled(user=%s, buddy=%s, blocked=%s)" % (user, buddy, blocked))

	def relogin(self, user, legacyName, password, extra):
		"""
		Used to re-initialize the session object. Used when finished with
		registration session and the user needs to login properly
		"""
		self.logger.debug("relogin(user=%s, legacyName=%s)" % (user, legacyName))
		# Change password in spectrum database
		self.handleQuery('register %s %s %s' % (user, legacyName, password))
		# Key word means we should register a new password
		if password == 'register': # This shouldn't happen, but just in case
			self.sessions[user] = RegisterSession(self, user, legacyName, extra)
		else:
			self.sessions[user] = Session(self, user, legacyName, extra)
		self.sessions[user].login(password)

	# TODO
	def handleAttentionRequest(self, user, buddy, message):
		pass

	def handleFTStartRequest(self, user, buddy, fileName, size, ftID):
		self.logger.debug('File send request %s, for user %s, from %s, size: %s' %
				(fileName, user, buddy, size))

	def handleFTFinishRequest(self, user, buddy, fileName, size, ftID):
		pass

	def handleFTPauseRequest(self, ftID):
		pass

	def handleFTContinueRequest(self, ftID):
		pass

	def handleRawXmlRequest(self, xml):
		pass

 	def handleMessageAckRequest(self, user, legacyName, ID = 0):
		self.logger.info("Meassage ACK request for %s !!" % legacyName)

	def sendData(self, data):
		self.io.sendData(data)