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

u"""
 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 import protocol_pb2

import logging
import time


class Buddy():
	def __init__(self, owner, number, nick, statusMsg, groups, image_hash):
		self.nick = nick
		self.owner = owner
		self.number = number
		self.groups = groups
		self.image_hash = image_hash if image_hash is not None else u""
		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):
		return u"%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__)
		self.synced = False

	def _load(self, buddies):
		for buddy in buddies:
			number = buddy.buddyName
			nick = buddy.alias
			statusMsg = buddy.statusMessage.decode(u'utf-8')
			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(u"Update roster")

#		old = self.buddies.keys()
#		self.buddies.load()
#		new = self.buddies.keys()
#		contacts = new
		contacts = self.keys()
		contacts.remove(u'bot')

		if self.synced == False:
			self.session.sendSync(contacts, delta = False, interactive = True)
			self.synced = True

#		add = set(new) - set(old)
#		remove = set(old) - set(new)

#		self.logger.debug(u"Roster remove: %s", str(list(remove)))
		self.logger.debug(u"Roster add: %s", str(list(contacts)))

#		for number in remove:
#			self.backend.handleBuddyChanged(self.user, number, u"", [],
#											protocol_pb2.STATUS_NONE)
#			self.backend.handleBuddyRemoved(self.user, number)
#			self.unsubscribePresence(number)
#
		for number in contacts:
			buddy = self[number]
			self.backend.handleBuddyChanged(self.user, number, buddy.nick,
				buddy.groups, protocol_pb2.STATUS_NONE,
				iconHash = buddy.image_hash if buddy.image_hash is not None else u"")
			self.session.subscribePresence(number)
		self.logger.debug(u"%s is requesting statuses of: %s", self.user, contacts)
		self.session.requestStatuses(contacts, success = self.onStatus)

	def onStatus(self, contacts):
		self.logger.debug(u"%s received statuses of: %s", self.user, contacts)
		for number, (status, time) in contacts.iteritems():
			buddy = self[number]
			buddy.statusMsg = status.decode(u'utf-8')
			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:
			self.session.sendSync([number], delta = True, interactive = True)
			self.session.subscribePresence(number)
			self.session.requestStatuses([number], success = self.onStatus)
			buddy = Buddy(self.owner, number, nick, u"",  groups, image_hash)
			self[number] = buddy
			self.logger.debug(u"Roster add: %s", buddy)

		self.updateSpectrum(buddy)
		return buddy

	def updateSpectrum(self, buddy):
		if buddy.presence == 0:
			status = protocol_pb2.STATUS_NONE
		elif buddy.presence == u'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(u"\n Last seen: %a, %d %b %Y %H:%M:%S", timestamp)

		self.backend.handleBuddyChanged(self.user, buddy.number, buddy.nick,
			buddy.groups, status, statusMessage = statusmsg,
			iconHash = buddy.image_hash if buddy.image_hash is not None else u"")


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