# -*- coding: utf-8 -*-
import time
import arrow
import languageHandler
import paths
import vkSessionHandler
import logging
import utils
import sound
from config_utils import Configuration, ConfigurationResetException
from pubsub import pub

log = logging.getLogger("session")

sessions = {}

# Saves possible set of identifier keys for VK'S data types
# see https://vk.com/dev/datatypes for more information.
# I've added the Date identifier (this is a field in unix time format), for special objects (like friendship indicators) because these objects doesn't have an own identifier.
identifiers = ["aid", "gid", "uid", "pid", "id", "post_id", "nid", "date"]

def find_item(list, item):
	""" Finds an item in a list  by taking an identifier"""
	# determines the kind of identifier that we are using
	global identifiers
	identifier = None
	for i in identifiers:
		if item.has_key(i):
			identifier =   i
			break
	if identifier == None:
		# if there are objects that can't be processed by lack of identifier, let's print  keys for finding one.
		log.exception("Can't find an identifier for the following object: %r" % (item.keys(),))
	for i in list:
		if i.has_key(identifier) and i[identifier] == item[identifier]:
			return True
	return False

def add_attachment(attachment):
	""" Adds information about attachment files in posts. It only adds the text, I mean, no attachment file is added here.
	This will produce a result like 'Title of a web page: http://url.xxx', etc."""
	msg = u""
	if attachment["type"] == "link":
		msg = u"{0}: {1}".format(attachment["link"]["title"], attachment["link"]["url"])
	elif attachment["type"] == "photo":
		msg = attachment["photo"]["text"]
		if msg == "":
			return "photo with no description available"
	elif attachment["type"] == "video":
		msg = u"video: {0}".format(attachment["video"]["title"],)
	return msg

def add_text(status):
	""" This shorts the text to 140 characters for displaying it in the list control."""
	message = ""
	if status.has_key("copy_history"):
		txt = status["copy_history"][0]["text"]
	else:
		txt = status["text"]
	if len(txt) < 140:
		message = utils.clean_text(txt)
	else:
		message = utils.clean_text(txt[:139])
	return message

def compose_person(status, session):
	if status.has_key("last_seen"):
		original_date = arrow.get(status["last_seen"]["time"])
		last_seen = _(u"{0}").format(original_date.humanize(locale=languageHandler.getLanguage()),)
	elif status.has_key("last_seen") == False and status.has_key("deactivated"):
			last_seen = _(u"Account deactivated")
	return [u"{0} {1}".format(status["first_name"], status["last_name"]), last_seen]

def compose_new(status, session):
	""" This method is used to compose an item of the news feed."""
	user = session.get_user_name(status["source_id"])
	if status.has_key("copy_history"):
		user = _(u"{0} has shared the {1}'s post").format(user, session.get_user_name(status["copy_history"][0]["owner_id"]))
	message = ""
	original_date = arrow.get(status["date"])
	created_at = original_date.humanize(locale=languageHandler.getLanguage())
	if status["type"] == "post":
		message += add_text(status)
		if status.has_key("attachment") and len(status["attachment"]) > 0:
			message += add_attachment(status["attachment"])
		if message == "":
			message = "no description available"
	elif status["type"] == "audio":
		# removes deleted audios.
		status["audio"] = clean_audio(status["audio"])
		if status["audio"]["count"] == 1:
			message = _(u"{0} has added  an audio: {1}").format(user, u", ".join(compose_audio(status["audio"]["items"][0], session)),)
		else:
			prem = ""
			for i in xrange(0, status["audio"]["count"]):
				composed_audio = compose_audio(status["audio"]["items"][i], session)
				prem += u"{0} - {1}, ".format(composed_audio[0], composed_audio[1])
			message = _(u"{0} has added  {1} audios: {2}").format(user, status["audio"]["count"], prem)
	elif status["type"] == "friend":
		msg_users = u""
		for i in status["friends"]["items"]:
			msg_users = msg_users + u"{0}, ".format(session.get_user_name(i["user_id"]))
		message = _(u"{0} hadded friends: {1}").format(user, msg_users)
	elif status["type"] == "video":
		if status["video"]["count"] == 1:
			message = _(u"{0} has added  a video: {1}").format(user, u", ".join(compose_video(status["video"]["items"][0], session)),)
		else:
			prem = ""
			for i in xrange(0, status["video"]["count"]):
				composed_video = compose_video(status["video"]["items"][i], session)
				prem += u"{0} - {1}, ".format(composed_video[0], composed_video[1])
			message = _(u"{0} has added  {1} videos: {2}").format(user, status["video"]["count"], prem)
	else:
		if status["type"] != "post": print status
	return [user, message, created_at]

def clean_audio(audio):
	for i in audio["items"][:]:
		if type(i) == bool:
			audio["items"].remove(i)
			audio["count"] = audio["count"] -1
	return audio

def compose_message(message, session):
	user = session.get_user_name(message["from_id"])
	original_date = arrow.get(message["date"])
	created_at = original_date.format(_(u"dddd, MMMM D, YYYY H:m:s"), locale=languageHandler.getLanguage())
	body = message["body"]
	return [u"{2}, {0} {1}".format(body, created_at, user)]

def compose_status(status, session):
	user = session.get_user_name(status["from_id"])
	if status.has_key("copy_history"):
		user = _(u"{0} has shared the {1}'s post").format(user, session.get_user_name(status["copy_history"][0]["owner_id"]))
	message = ""
	original_date = arrow.get(status["date"])
	created_at = original_date.humanize(locale=languageHandler.getLanguage())
	if status.has_key("copy_owner_id"):
		user = _(u"{0} has shared the {1}'s post").format(user, session.get_user_name(status["copy_owner_id"]))
	if status["post_type"] == "post" or status["post_type"] == "copy":
		message += add_text(status)
	if status.has_key("attachment") and len(status["attachment"]) > 0:
		message += add_attachment(status["attachment"])
		if message == "":
			message = "no description available"
	return [user, message, created_at]

def compose_audio(audio, session=None):
	if audio == False: return [_(u"Audio removed from library"), "", ""]
	return [audio["title"], audio["artist"], utils.seconds_to_string(audio["duration"])]

def compose_video(video, session=None):
	if video == False: return [_(u"Audio removed from library"), "", ""]
	return [video["title"], utils.seconds_to_string(video["duration"])]

class vkSession(object):

	def order_buffer(self, name, data, show_nextpage):

		""" Put new items on the local database. Useful for cursored buffers
		name str: The name for the buffer stored in the dictionary.
		data list: A list with items and some information about cursors.
		returns the number of items that has been added in this execution"""
		first_addition = False
		num = 0
		if self.db.has_key(name) == False:
			self.db[name] = {}
			self.db[name]["items"] = []
			first_addition = True
		for i in data:
			if i.has_key("type") and (i["type"] == "wall_photo" or i["type"] == "photo_tag" or i["type"] == "photo"):
				log.debug("Skipping unsupported item... %r" % (i,))
				continue
			if find_item(self.db[name]["items"], i) == False:
#			if i not in self.db[name]["items"]:
				if first_addition == True or show_nextpage == True:
					if self.settings["general"]["reverse_timelines"] == False: self.db[name]["items"].append(i)
					else: self.db[name]["items"].insert(0, i)
				else:
					if self.settings["general"]["reverse_timelines"] == False: self.db[name]["items"].insert(0, i)
					else: self.db[name]["items"].append(i)
				num = num+1
		log.debug("There are %d items in the %s buffer" % (len(self.db[name]["items"]), name))
		return num

	def __init__(self, session_id):
		self.session_id = session_id
		self.logged = False
		self.settings = None
		self.vk = vkSessionHandler.vkObject()
		self.db = {}
		self.db["users"] = {}
		self.db["groups"] = {}

	@property
	def is_logged(self):
		return self.logged

	def get_configuration(self):

		""" Gets settings for a session."""
 
		file_ = "%s/session.conf" % (self.session_id,)
#  try:
		log.debug("Creating config file %s" % (file_,))
		self.settings = Configuration(paths.config_path(file_), paths.app_path("session.defaults"))
		self.soundplayer = sound.soundSystem(self.settings["sound"])
#  except:
#   log.exception("The session configuration has failed.")

	def login(self):
		""" Login  using  credentials from settings.
		if the user account isn't authorised, it'll call self.authorise() before login.
		If the access_token has expired, it will call authorise() too, for getting a new access token."""

		if self.settings["vk"]["token"] != None:
			result = self.vk.login_access_token(self.settings["vk"]["token"])
			self.logged = True
			log.debug("Logged.")
			if result == False:
				self.authorise()
		else:
			self.authorise()
		self.get_my_data()

	def authorise(self):
		try:
			self.vk.login(self.settings["vk"]["user"], self.settings["vk"]["password"])
			self.settings["vk"]["token"] = self.vk.client._session.access_token
			self.settings.write()
		except:
			self.settings["vk"]["user"] = ""
			self.settings["vk"]["password"] = ""
			self.settings.write()
			pub.sendMessage("authorisation-failed")

	def post_wall_status(self, message, *args, **kwargs):
		""" Sends a post to an user, group or community wall."""
		log.debug("Making a post to the user's wall with the following params: %r" % (kwargs,))
		response = self.vk.client.wall.post(message=message, *args, **kwargs)

	def get_newsfeed(self, name="newsfeed", show_nextpage=False, endpoint="", *args, **kwargs):
		log.debug("Updating news feed...")
		if show_nextpage == True and self.db[name].has_key("cursor"):
			log.debug("user has requested previous items")
			kwargs["start_from"] = self.db[name]["cursor"]
			log.debug("Params for sending to vk: %r" % (kwargs,))
		data = getattr(self.vk.client.newsfeed, "get")(*args, **kwargs)
		if data != None:
			if show_nextpage == False:
				self.process_usernames(data)
#			else:
#				print data.keys(), len(data["items"]), data["next_from"]
			num = self.order_buffer(name, data["items"], show_nextpage)
			log.debug("Keys of the returned data for debug purposes: %r" % (data.keys(),))
			if data.has_key("next_from"):
				self.db[name]["cursor"] = data["next_from"]
			return num

	def get_page(self, name="", show_nextpage=False, endpoint="", *args, **kwargs):
		data = None
		if kwargs.has_key("parent_endpoint"):
			p = kwargs["parent_endpoint"]
			kwargs.pop("parent_endpoint")
		p = getattr(self.vk.client, p)
		log.debug("Calling endpoint %s with params %r" % (p, kwargs,))
		data = getattr(p, endpoint)(*args, **kwargs)
		if data != None:
			if type(data) == dict:
				num = self.order_buffer(name, data["items"], show_nextpage)
				if len(data["items"]) > 0 and data["items"][0].has_key("first_name"):
					for i in data["items"]:
						self.db["users"][i["id"]] = u"{0} {1}".format(i["first_name"], i["last_name"])
				if data.has_key("profiles") and data.has_key("groups"):
					self.process_usernames(data)
			else:
				num = self.order_buffer(name, data, show_nextpage)
			return num

	def get_messages(self, name="", *args, **kwargs):
		data = self.vk.client.messages.getHistory(*args, **kwargs)
		if data != None:
			num = self.order_buffer(name, data["items"], False)
			return num

	def get_user_name(self, user_id):
		if user_id > 0:
			if self.db["users"].has_key(user_id):
				return self.db["users"][user_id]
			else:
				return "no specified user"
		else:
			if self.db["groups"].has_key(abs(user_id)):
				return self.db["groups"][abs(user_id)]
			else:
				return "no specified community"

	def get_users(self, user_ids=None, group_ids=None):
		log.debug("Getting user information from the VK servers")
		if user_ids != None:
			u = self.vk.client.users.get(user_ids=user_ids, fields="uid, first_name, last_name")
			for i in u:
				self.db["users"][i["id"]] = u"{0} {1}".format(i["first_name"], i["last_name"])
		if group_ids != None:
			g = self.vk.client.groups.getById(group_ids=group_ids, fields="name")
			for i in g:
				self.db["groups"][i["id"]] = i["name"]

	def process_usernames(self, data):
		log.debug("Adding usernames to the local database...")
		for i in data["profiles"]:
			self.db["users"][i["id"]] = u"{0} {1}".format(i["first_name"], i["last_name"])
		for i in data["groups"]:
			self.db["groups"][i["id"]] = i["name"]

	def get_my_data(self):
		log.debug("Getting user identifier...")
		user = self.vk.client.users.get(fields="uid, first_name, last_name")
		self.user_id = user[0]["id"]
		self.db["users"][self.user_id] = u"{0} {1}".format(user[0]["first_name"], user[0]["last_name"])