from Spectrum2 import protocol_pb2

import logging
import time
import utils
import base64
import hashlib

import deferred
from deferred import call

def sha1hash(data):
	hashlib.sha1(data).hexdigest()

class Buddy():
	def __init__(self, owner, number, nick, statusMsg, groups, image_hash):
		self.nick = nick
		self.owner = owner
		self.number = "%s" % number
		self.groups = groups
		self.image_hash = image_hash if image_hash is not None else ""
		self.statusMsg = u""
		self.lastseen = 0
		self.presence = 0

	def update(self, nick, groups, image_hash):
		self.nick = nick
		self.groups = groups
		if image_hash is not None:
			self.image_hash = image_hash

	def __str__(self):
		# we must return str here
		return str("%s (nick=%s)") % (self.number, self.nick)

class BuddyList(dict):

	def __init__(self, owner, backend, user, session):
		self.owner = owner
		self.backend = backend
		self.session = session
		self.user = user
		self.logger = logging.getLogger(self.__class__.__name__)

	def _load(self, buddies):
		for buddy in buddies:
			number = buddy.buddyName
			nick = buddy.alias
			statusMsg = buddy.statusMessage
			groups = [g for g in buddy.group]
			image_hash = buddy.iconHash
			self[number] = Buddy(self.owner, number, nick, statusMsg,
					groups, image_hash)

		self.logger.debug("Update roster")

		contacts = self.keys()
		contacts.remove('bot')

		self.session.sendSync(contacts, delta=False, interactive=True,
				success=self.onSync)

		self.logger.debug("Roster add: %s" % list(contacts))

		for number in contacts:
			buddy = self[number]
			self.updateSpectrum(buddy)

	def onSync(self, existing, nonexisting, invalid):
		"""We should only presence subscribe to existing numbers"""

		for number in existing:
			self.session.subscribePresence(number)
		self.logger.debug("%s is requesting statuses of: %s" % (self.user, existing))
		self.session.requestStatuses(existing, success = self.onStatus)

		self.logger.debug("Removing nonexisting buddies %s" % nonexisting)
		for number in nonexisting:
			self.remove(number)
			try: del self[number]
			except KeyError: self.logger.warn("non-existing buddy really didn't exist: %s" % number)

		self.logger.debug("Removing invalid buddies %s" % invalid)
		for number in invalid:
			self.remove(number)
			try: del self[number]
			except KeyError: self.logger.warn("non-existing buddy really didn't exist: %s" % number)

	def onStatus(self, contacts):
		self.logger.debug("%s received statuses of: %s" % (self.user, contacts))
		for number, (status, time) in contacts.iteritems():
			try: buddy = self[number]
			except KeyError: self.logger.warn("received status of buddy not in list: %s" % number)
			if status is None:
				buddy.statusMsg = ""
			else:
				buddy.statusMsg = status
			self.updateSpectrum(buddy)

	def load(self, buddies):
		if self.session.loggedIn:
			self._load(buddies)
		else:
			self.session.loginQueue.append(lambda: self._load(buddies))

	def update(self, number, nick, groups, image_hash):
		if number in self:
			buddy = self[number]
			buddy.update(nick, groups, image_hash)
		else:
			buddy = Buddy(self.owner, number, nick, "",  groups, image_hash)
			self[number] = buddy
			self.logger.debug("Roster add: %s" % buddy)
			self.session.sendSync([number], delta = True, interactive = True)
			self.session.subscribePresence(number)
			self.session.requestStatuses([number], success = self.onStatus)
			if image_hash == "" or image_hash is None:
				self.requestVCard(number)
		self.updateSpectrum(buddy)
		return buddy

	def updateSpectrum(self, buddy):
		if buddy.presence == 0:
			status = protocol_pb2.STATUS_NONE
		elif buddy.presence == 'unavailable':
			status = protocol_pb2.STATUS_AWAY
		else:
			status = protocol_pb2.STATUS_ONLINE

		statusmsg = buddy.statusMsg
		if buddy.lastseen != 0:
			timestamp = time.localtime(buddy.lastseen)
			statusmsg += time.strftime("\n Last seen: %a, %d %b %Y %H:%M:%S", timestamp)

		iconHash = buddy.image_hash if buddy.image_hash is not None else ""

		self.logger.debug("Updating buddy %s (%s) in %s, image_hash = %s" %
				(buddy.nick, buddy.number, buddy.groups, iconHash))
		self.logger.debug("Status Message: %s" % statusmsg)
		self.backend.handleBuddyChanged(self.user, buddy.number, buddy.nick,
			buddy.groups, status, statusMessage=statusmsg, iconHash=iconHash)

	def remove(self, number):
		try:
			buddy = self[number]
			del self[number]
			self.backend.handleBuddyChanged(self.user, number, "", [],
											protocol_pb2.STATUS_NONE)
			self.backend.handleBuddyRemoved(self.user, number)
			self.session.unsubscribePresence(number)
			# TODO Sync remove
			return buddy
		except KeyError:
			return None

	def requestVCard(self, buddy, ID=None):
		if "/" in buddy:
			room, nick = buddy.split("/")
			group = self.session.groups[room]
			buddynr = None
			for othernumber, othernick in group.participants.iteritems():
				if othernick == nick:
					buddynr = othernumber
					break
			if buddynr is None:
				return
		else:
			buddynr = buddy
				

		if buddynr == self.user or buddynr == self.user.split('@')[0]:
			buddynr = self.session.legacyName

		# Get profile picture
		self.logger.debug('Requesting profile picture of %s' % buddynr)
		response = deferred.Deferred()
		# Error probably means image doesn't exist
		error = deferred.Deferred()
		self.session.requestProfilePicture(buddynr, onSuccess=response.run,
				onFailure=error.run)
		response = response.arg(0)

		pictureData = response.pictureData()
		# Send VCard
		if ID != None:
			call(self.logger.debug, 'Sending VCard (%s) with image id %s: %s' %
					(ID, response.pictureId(), pictureData.then(base64.b64encode)))
			call(self.backend.handleVCard, self.user, ID, buddy, "", "",
					pictureData)
			# If error
			error.when(self.logger.debug, 'Sending VCard (%s) without image' % ID)
			error.when(self.backend.handleVCard, self.user, ID, buddy, "", "", "")

		# Send image hash
		if not buddynr == self.session.legacyName:
			try:
				obuddy = self[buddynr]
				nick = obuddy.nick
				groups = obuddy.groups
			except KeyError:
				nick = ""
				groups = []
			image_hash = pictureData.then(sha1hash)
			call(self.logger.debug, 'Image hash is %s' % image_hash)
			call(self.update, buddynr, nick, groups, image_hash)
			# No image
			error.when(self.logger.debug, 'No image')
			error.when(self.update, buddynr, nick, groups, '')

	def refresh(self, number):
		self.session.unsubscribePresence(number)
		self.session.subscribePresence(number)
		self.requestVCard(number)
		self.session.requestStatuses([number], success = self.onStatus)