from getpass import getpass

from iri_tweet import models, utils

from iri_tweet.models import TweetSource, TweetLog

from multiprocessing import Queue, JoinableQueue, Process, Event, get_logger

from optparse import OptionParser

from sqlalchemy.orm import sessionmaker

import StringIO

import logging

import anyjson

import datetime

import os

import shutil

import signal

import socket

import sys

import time

import traceback

import tweepy.auth

import tweetstream

from iri_tweet.utils import logger

from sqlalchemy.exc import OperationalError

socket._fileobject.default_bufsize = 0

#columns_tweet = [u'favorited', u'truncated', u'text', u'created_at', u'source', u'in_reply_to_status_id', u'in_reply_to_screen_name', u'in_reply_to_user_id', u'geo', u'id', u'user']

columns_tweet = [u'user', u'favorited', u'contributors', u'truncated', u'text', u'created_at', u'retweeted', u'in_reply_to_status_id_str', u'coordinates', u'in_reply_to_user_id_str', u'entities', u'in_reply_to_status_id', u'place', u'in_reply_to_user_id', u'id', u'in_reply_to_screen_name', u'retweet_count', u'geo', u'id_str', u'source']

#columns_user = [u'id', u'verified', u'profile_sidebar_fill_color', u'profile_text_color', u'followers_count', u'protected', u'location', u'profile_background_color', u'utc_offset', u'statuses_count', u'description', u'friends_count', u'profile_link_color', u'profile_image_url', u'notifications', u'geo_enabled', u'profile_background_image_url', u'screen_name', u'profile_background_tile', u'favourites_count', u'name', u'url', u'created_at', u'time_zone', u'profile_sidebar_border_color', u'following']

columns_user = [u'follow_request_sent', u'profile_use_background_image', u'id', u'verified', u'profile_sidebar_fill_color', u'profile_text_color', u'followers_count', u'protected', u'location', u'profile_background_color', u'id_str', u'utc_offset', u'statuses_count', u'description', u'friends_count', u'profile_link_color', u'profile_image_url', u'notifications', u'show_all_inline_media', u'geo_enabled', u'profile_background_image_url', u'name', u'lang', u'following', u'profile_background_tile', u'favourites_count', u'screen_name', u'url', u'created_at', u'contributors_enabled', u'time_zone', u'profile_sidebar_border_color', u'is_translator', u'listed_count']

#just put it in a sqlite3 tqble

class ReconnectingTweetStream(tweetstream.FilterStream):

    """TweetStream class that automatically tries to reconnect if the

    connecting goes down. Reconnecting, and waiting for reconnecting, is

    blocking.

    :param username: See :TweetStream:

    :param password: See :TweetStream:

    :keyword url: See :TweetStream:

    :keyword reconnects: Number of reconnects before a ConnectionError is

        raised. Default is 3

    :error_cb: Optional callable that will be called just before trying to

        reconnect. The callback will be called with a single argument, the

        exception that caused the reconnect attempt. Default is None

    :retry_wait: Time to wait before reconnecting in seconds. Default is 5

    """

    def __init__(self, auth, keywords, reconnects=3, error_cb=None, retry_wait=5, as_text=False, **kwargs):

        self.max_reconnects = reconnects

        self.retry_wait = retry_wait

        self._reconnects = 0

        self._error_cb = error_cb

        super(ReconnectingTweetStream, self).__init__(auth=auth, track=keywords, as_text=as_text, **kwargs)

    def next(self):

        while True:

            try:

                return super(ReconnectingTweetStream, self).next()

            except tweetstream.ConnectionError, e:

                logging.debug("connection error :" + str(e))

                self._reconnects += 1

                if self._reconnects > self.max_reconnects:

                    raise tweetstream.ConnectionError("Too many retries")

                # Note: error_cb is not called on the last error since we

                # raise a ConnectionError instead

                if  callable(self._error_cb):

                    self._error_cb(e)

                time.sleep(self.retry_wait)

        # Don't listen to auth error, since we can't reasonably reconnect

        # when we get one.

class SourceProcess(Process):

    def __init__(self, session_maker, queue, auth, track, debug, reconnects, token_filename, stop_event):

        self.session_maker = session_maker

        self.queue = queue

        self.auth = auth

        self.track = track

        self.debug = debug

        self.reconnects = reconnects

        self.token_filename = token_filename

        self.stop_event = stop_event

        super(SourceProcess, self).__init__()

#        self.stop_event = 

    def run(self):

        get_logger().debug("SourceProcess : run")

        track_list = self.track # or raw_input('Keywords to track (comma seperated): ').strip()

        track_list = [k for k in track_list.split(',')]

        get_logger().debug("SourceProcess : before connecting to stream " + repr(track_list))                        

        stream = ReconnectingTweetStream(self.auth, track_list, reconnects=self.reconnects, as_text=True)

        get_logger().debug("SourceProcess : after connecting to stream")

        stream.muststop = lambda: self.stop_event.is_set()

        session = self.session_maker()

        try:

            for tweet in stream:

                get_logger().debug("tweet " + repr(tweet))

                source = TweetSource(original_json=tweet)

                get_logger().debug("source created")

                add_retries = 0

                while add_retries < 10:

                    try:

                        add_retries += 1

                        session.add(source)

                        session.flush()

                        break

                    except OperationalError as e:

                        session.rollback()

                        get_logger().debug("Operational Error %s nb %d" % (repr(e), add_retries))

                        if add_retries==10:

                            raise e

                source_id = source.id

                get_logger().debug("before queue + source id " + repr(source_id))

                self.queue.put((source_id, tweet), False)

                #process_tweet(tweet, source_id, self.session, self.debug, self.token_filename)

                get_logger().info("Tweet count: %d - current rate : %.2f - running : %s" % (stream.count, stream.rate, int(time.time() - stream.starttime)))

                session.commit()

#                if duration >= 0 and  datetime.datetime.utcnow() >= end_ts:

#                    print "Stop recording after %d seconds." % (duration)

#                    break

        except Exception as e:

            get_logger().error("Error when processing tweet " + repr(e))

        finally:

            session.rollback()

            stream.close()

            session.close()

            self.queue.close()

            self.stop_event.set()

def process_tweet(tweet, source_id, session, token_filename):

    try:

        tweet_obj = anyjson.deserialize(tweet)

        screen_name = ""

        if 'user' in tweet_obj and 'screen_name' in tweet_obj['user']:

            screen_name = tweet_obj['user']['screen_name']

        get_logger().info(u"Process_tweet from %s : %s" % (screen_name, tweet_obj['text']))

        get_logger().debug(u"Process_tweet :" + repr(tweet))

        processor = utils.TwitterProcessor(tweet_obj, tweet, source_id, session, token_filename)

        processor.process()

    except Exception as e:

        message = u"Error %s processing tweet %s" % (repr(e), tweet)

        get_logger().error(message)

        output = StringIO.StringIO()

        traceback.print_exception(Exception, e, None, None, output)

        error_stack = output.getvalue()

        output.close()

        session.rollback()

        tweet_log = TweetLog(tweet_source_id=source_id, status=TweetLog.TWEET_STATUS['ERROR'], error=message, error_stack=error_stack)

        session.add(tweet_log)

        session.commit()

class TweetProcess(Process):

    def __init__(self, session_maker, queue, debug, token_filename, stop_event):

        self.session_maker = session_maker

        self.queue = queue

        self.debug = debug

        self.stop_event = stop_event

        self.token_filename = token_filename

        super(TweetProcess, self).__init__()

    def run(self):

        session = self.session_maker()

        try:

            while not self.stop_event.is_set():

                try:

                    source_id, tweet_txt = queue.get(True, 10)

                    get_logger().debug("Processing source id " + repr(source_id))

                except Exception as e:

                    get_logger().debug('Process tweet exception in loop : ' + repr(e))

                    continue

                process_tweet(tweet_txt, source_id, session, self.token_filename)

                session.commit()

        except:

            raise

        finally:

            session.rollback()

            self.stop_event.set()

            session.close()

def process_leftovers(session, token_filename):

    sources = session.query(TweetSource).outerjoin(TweetLog).filter(TweetLog.id == None)

    for src in sources:

        tweet_txt = src.original_json

        process_tweet(tweet_txt, src.id, session, token_filename)

    #get tweet source that do not match any message

    #select * from tweet_tweet_source ts left join tweet_tweet_log tl on ts.id = tl.tweet_source_id where tl.id isnull;

def get_options():

    parser = OptionParser()

    parser.add_option("-f", "--file", dest="filename",

                      help="write tweet to FILE", metavar="FILE", default="enmi2010_twitter.db")

    parser.add_option("-u", "--user", dest="username",

                      help="Twitter user", metavar="USER", default=None)

    parser.add_option("-w", "--password", dest="password",

                      help="Twitter password", metavar="PASSWORD", default=None)

    parser.add_option("-T", "--track", dest="track",

                      help="Twitter track", metavar="TRACK")

    parser.add_option("-n", "--new", dest="new", action="store_true",

                      help="new database", default=False)

    parser.add_option("-r", "--reconnects", dest="reconnects",

                      help="Reconnects", metavar="RECONNECTS", default=10, type='int')

    parser.add_option("-t", dest="token_filename", metavar="TOKEN_FILENAME", default=".oauth_token",

                      help="Token file name")

    parser.add_option("-d", "--duration", dest="duration",

                      help="Duration of recording in seconds", metavar="DURATION", default= -1, type='int')

    parser.add_option("-N", "--consumer", dest="consumer_nb",

                      help="number of consumer", metavar="CONSUMER", default=1, type='int')

    utils.set_logging_options(parser)

    return parser.parse_args()

if __name__ == '__main__':

    (options, args) = get_options()

    utils.set_logging(options, get_logger())

    if options.debug:

        print "OPTIONS : "

        print repr(options)

    if options.new and os.path.exists(options.filename):

        i = 1

        basename, extension = os.path.splitext(options.filename)

        new_path = '%s.%d%s' % (basename, i, extension)

        while i < 1000000 and os.path.exists(new_path):

            i += 1

            new_path = '%s.%d%s' % (basename, i, extension)

        if i >= 1000000:

            raise Exception("Unable to find new filename for " + options.filename)

        else:

            shutil.move(options.filename, new_path)

    queue = JoinableQueue()

    stop_event = Event()

    if options.username and options.password:

        auth = tweepy.auth.BasicAuthHandler(options.username, options.password)        

    else:

        consumer_key = models.CONSUMER_KEY

        consumer_secret = models.CONSUMER_SECRET

        auth = tweepy.auth.OAuthHandler(consumer_key, consumer_secret, secure=False)

        auth.set_access_token(*(utils.get_oauth_token(options.token_filename)))

    engine, metadata = models.setup_database('sqlite:///' + options.filename, echo=(options.debug >= 2))

    Session = sessionmaker(bind=engine)

    session = Session()

    process_leftovers(session, options.token_filename)

    session.commit()

    session.close()

    sprocess = SourceProcess(Session, queue, auth, options.track, options.debug, options.reconnects, options.token_filename, stop_event)    

    tweet_processes = []

    for i in range(options.consumer_nb):

        engine, metadata = models.setup_database('sqlite:///' + options.filename, echo=(options.debug >= 2))

        Session = sessionmaker(bind=engine)

        cprocess = TweetProcess(Session, queue, options.debug, options.token_filename, stop_event)

        tweet_processes.append(cprocess)

    def interupt_handler(signum, frame):

        stop_event.set()

    signal.signal(signal.SIGINT, interupt_handler)

    sprocess.start()

    for cprocess in tweet_processes:

        cprocess.start()

    if options.duration >= 0:

        end_ts = datetime.datetime.utcnow() + datetime.timedelta(seconds=options.duration)

    while not stop_event.is_set():

        if options.duration >= 0 and  datetime.datetime.utcnow() >= end_ts:

            stop_event.set()

            break

        if sprocess.is_alive():

            time.sleep(0.1)

        else:

            break

    get_logger().debug("Joining Source Process")

    sprocess.join()

    get_logger().debug("Joining Queue")

    #queue.join()

    for i,cprocess in enumerate(tweet_processes):

        get_logger().debug("Joining consumer process Nb %d" % (i+1))

        cprocess.join()

    get_logger().debug("Processing leftovers")

    session = Session()

    process_leftovers(session, options.token_filename)

    session.commit()

    session.close()

    get_logger().debug("Done. Exiting.")