from getpass import getpass

from iri_tweet import models, utils

from iri_tweet.models import TweetSource, TweetLog, ProcessEvent

from multiprocessing import (Queue as mQueue, JoinableQueue, Process, Event, 

    get_logger)

from optparse import OptionParser

from sqlalchemy.exc import OperationalError

from sqlalchemy.orm import scoped_session

import Queue

import StringIO

import anyjson

import datetime

import inspect

import logging

import os

import re

import shutil

import signal

import socket

import sqlalchemy.schema

import sys

import threading

import time

import traceback

import urllib2

socket._fileobject.default_bufsize = 0

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'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']

DEFAULT_TIMEOUT = 5

def set_logging(options):

    loggers = []

    loggers.append(utils.set_logging(options, logging.getLogger('iri.tweet')))

    loggers.append(utils.set_logging(options, logging.getLogger('multiprocessing')))

    if options.debug >= 2:

        loggers.append(utils.set_logging(options, logging.getLogger('sqlalchemy.engine')))

    return loggers

def set_logging_process(options, queue):

    qlogger = utils.set_logging(options, logging.getLogger('iri.tweet.p'), queue)

    qlogger.propagate = 0

    return qlogger

def get_auth(options, access_token):

    if options.username and options.password:

    else:

        consumer_key = models.CONSUMER_KEY

        consumer_secret = models.CONSUMER_SECRET

    return auth

def add_process_event(type, args, session_maker):

    session = session_maker()

    try:

        evt = ProcessEvent(args=None if args is None else anyjson.serialize(args), type=type)

        session.add(evt)

        session.commit()

    finally:

        session.close()

class BaseProcess(Process):

    def __init__(self, session_maker, queue, options, access_token, stop_event, logger_queue, parent_pid):

        self.parent_pid = parent_pid

        self.session_maker = session_maker

        self.queue = queue

        self.options = options

        self.logger_queue = logger_queue

        self.stop_event = stop_event

        self.access_token = access_token

        super(BaseProcess, self).__init__()

    #

    # from http://stackoverflow.com/questions/2542610/python-daemon-doesnt-kill-its-kids

    #

    def parent_is_alive(self):

        try:

            # try to call Parent

            os.kill(self.parent_pid, 0)

        except OSError:

            # *beeep* oh no! The phone's disconnected!

            return False

        else:

            # *ring* Hi mom!

            return True

    def __get_process_event_args(self):

        return {'name':self.name, 'pid':self.pid, 'parent_pid':self.parent_pid, 'options':self.options.__dict__, 'access_token':self.access_token}

    def run(self):

        try:

            add_process_event("start_worker", self.__get_process_event_args(), self.session_maker)

            self.do_run()

        finally:

            add_process_event("stop_worker", self.__get_process_event_args(), self.session_maker)

    def do_run(self):

        raise NotImplementedError()

class SourceProcess(BaseProcess):

    def __init__(self, session_maker, queue, options, access_token, stop_event, logger_queue, parent_pid):

        self.track = options.track

        self.token_filename = options.token_filename

        self.catchup = options.catchup

        self.timeout = options.timeout

        self.stream = None

        super(SourceProcess, self).__init__(session_maker, queue, options, access_token, stop_event, logger_queue, parent_pid)

    def __source_stream_iter(self):

        self.logger = set_logging_process(self.options, self.logger_queue)

        self.logger.debug("SourceProcess : run ")

        self.auth = get_auth(self.options, self.access_token) 

        self.logger.debug("SourceProcess : auth set ")

        self.logger.debug("SourceProcess : track list " + track_list)

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

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

        self.logger.debug("SourceProcess : after connecting to stream")

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

        session = self.session_maker()

        try:

            for tweet in stream_wrapper:

                if not self.parent_is_alive():

                    self.stop_event.set()

                    stop_thread.join(5)

                    sys.exit()

                self.logger.debug("SourceProcess : tweet " + repr(tweet))

                source = TweetSource(original_json=tweet)

                self.logger.debug("SourceProcess : 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()

                        self.logger.debug("SourceProcess : Operational Error %s nb %d" % (repr(e), add_retries))

                        if add_retries == 10:

                            raise

                source_id = source.id

                self.logger.debug("SourceProcess : before queue + source id " + repr(source_id))

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

                session.commit()

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

        except Exception as e:

            self.logger.error("SourceProcess : Error when processing tweet " + repr(e))

            raise

        finally:

            session.rollback()

            session.close()

            self.logger_queue.close()

            self.queue.close()

            self.stream.close()

            self.stream = None

            if not self.stop_event.is_set():

                self.stop_event.set()

    def do_run(self):

        source_stream_iter_thread = threading.Thread(target=self.__source_stream_iter , name="SourceStreamIterThread")

        source_stream_iter_thread.start()

        while not self.stop_event.is_set():

            self.logger.debug("SourceProcess : In while after start")

            self.stop_event.wait(DEFAULT_TIMEOUT)

            if self.stop_event.is_set() and self.stream:

                self.stream.close()

            elif not self.stop_event.is_set() and not source_stream_iter_thread.is_alive:

                self.stop_event.set()

        self.logger.info("SourceProcess : join")

        source_stream_iter_thread.join(30)

def process_tweet(tweet, source_id, session, access_token, twitter_query_user, logger):

    try:

        if not tweet.strip():

            return

        tweet_obj = anyjson.deserialize(tweet)

        if 'text' not in tweet_obj:

            tweet_log = TweetLog(tweet_source_id=source_id, status=TweetLog.TWEET_STATUS['NOT_TWEET'])

            session.add(tweet_log)

            return

        screen_name = ""

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

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

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

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

        processor = utils.TwitterProcessor(tweet_obj, tweet, source_id, session, access_token, None, twitter_query_user)

        processor.process()

    except ValueError as e:

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

        output = StringIO.StringIO()

        try:

            traceback.print_exc(file=output)

            error_stack = output.getvalue()

        finally:

            output.close()

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

        session.add(tweet_log)

        session.commit()        

    except Exception as e:

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

        logger.exception(message)

        output = StringIO.StringIO()

        try:

            traceback.print_exc(file=output)

            error_stack = output.getvalue()

        finally:

            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(BaseProcess):

    def __init__(self, session_maker, queue, options, access_token, stop_event, logger_queue, parent_pid):

        super(TweetProcess, self).__init__(session_maker, queue, options, access_token, stop_event, logger_queue, parent_pid)

        self.twitter_query_user = options.twitter_query_user

    def do_run(self):

        self.logger = set_logging_process(self.options, self.logger_queue)

        session = self.session_maker()

        try:

            while not self.stop_event.is_set() and self.parent_is_alive():

                try:

                    source_id, tweet_txt = self.queue.get(True, 3)

                    self.logger.debug("Processing source id " + repr(source_id))

                except Exception as e:

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

                    continue

                process_tweet(tweet_txt, source_id, session, self.access_token, self.twitter_query_user, self.logger)

                session.commit()

        finally:

            session.rollback()

            session.close()

def get_sessionmaker(conn_str):

    engine, metadata, Session = models.setup_database(conn_str, echo=False, create_all=False, autocommit=False)

    Session = scoped_session(Session)

    return Session, engine, metadata

def process_leftovers(session, access_token, twitter_query_user, logger):

    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, access_token, twitter_query_user, logger)

        session.commit()

def process_log(logger_queues, stop_event):

    while not stop_event.is_set():

        for lqueue in logger_queues:

            try:

                record = lqueue.get_nowait()

                logging.getLogger(record.name).handle(record)

            except Queue.Empty:

                continue

            except IOError:

                continue

        time.sleep(0.1)

def get_options():

    usage = "usage: %prog [options]"

    parser = OptionParser(usage=usage)

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

                      help="write tweet to DATABASE. This is a connection string", metavar="CONNECTION_STR", 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("-D", "--daemon", dest="daemon", action="store_true",

                      help="launch daemon", default=False)

    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", "--nb-process", dest="process_nb",

                      help="number of process.\nIf 0, only the lefovers of the database are processed.\nIf 1, no postprocessing is done on the tweets.", metavar="PROCESS_NB", default=2, type='int')

    parser.add_option("--url", dest="url",

    parser.add_option("--query-user", dest="twitter_query_user", action="store_true",

                      help="Query twitter for users", default=False, metavar="QUERY_USER")

    parser.add_option("--catchup", dest="catchup",

                      help="catchup count for tweets", default=None, metavar="CATCHUP", type='int')