#!/usr/bin/python

import os, sys
import logging
import argparse
import eventlet
import tweepy
import config
import time
from telnetsrv.evtlet import TelnetHandler, command

for key in config.twitter_conf:
    if config.twitter_conf[key] == 'env':
        try:
            os.environ[key]
            config.twitter_conf[key] = os.environ[key]
        except KeyError:
            print "Please, set the environment variable %s or set it in the config" % key
            sys.exit(1)

logging.getLogger('').setLevel(logging.DEBUG)

TELNET_IP_BINDING = '' #all

parser = argparse.ArgumentParser( description='Run a fttp server.')
parser.add_argument( 'port', metavar="PORT", type=int, help="The port on which to listen on." )
console_args = parser.parse_args()

TELNET_PORT_BINDING = console_args.port

class TwitterApi():
    '''Twitter Api'''

    auth = tweepy.OAuthHandler(config.twitter_conf['TW_CONSUMER_KEY'], config.twitter_conf['TW_CONSUMER_SECRET'])
    auth.set_access_token(config.twitter_conf['TW_ACCESS_TOKEN'], config.twitter_conf['TW_ACCESS_TOKEN_SECRET'])
    api = tweepy.API(auth)

    def send(self, tweet):
        self.api.update_status(status=tweet)

    def get_tweets_by_tag(self, tag):
        tweets = ""
        feed = self.api.search(tag, count=20)
        for i in feed:
            tweets = tweets + i.user.screen_name + ": " + i.text + "\n"
        return tweets.encode('utf-8').strip()



class TestTelnetHandler(TelnetHandler):

    # -- Override items to customize the server --

    WELCOME = 'You have connected to the fttp server.'
    PROMPT = "fttp% "
    authNeedUser = False
    authNeedPass = False

    twitter = TwitterApi()

    # queue = eventlet.queue.Queue(10000)
    # wait = eventlet.semaphore.CappedSemaphore(1000)

    def feed_auto(self):
        # while True:
            self.feed = self.twitter.get_tweets_by_tag(config.twitter_conf['TW_DEFAULT_TAG'])
            self.writeresponse(self.feed)
            # time.sleep(5)

    def session_start(self):
        '''Called after the user successfully logs in.'''
        self.get_tweets_event = []
        message = self.feed_auto()
        event = eventlet.spawn(self.writemessage, message)
        self.get_tweets_event.append(event)

    def session_end(self):
        '''Called after the user logs off.'''
        for event in self.get_tweets_event:
            event.kill()

    def writeerror(self, text):
        '''Called to write any error information (like a mistyped command).
        Add a splash of color using ANSI to render the error text in red.
        see http://en.wikipedia.org/wiki/ANSI_escape_code'''
        TelnetHandler.writeerror(self, "\x1b[91m%s\x1b[0m" % text )

    # -- Twitter Commands --

    @command(['tweet', 'send'])
    def command_tweet(self, params):
        ''' <message>
        Sends the message as a tweet from @OpenFest_Fttp
        '''
        message = " ".join(params)
        self.twitter.send(message)

    @command(['feed', 'get_tweets'])
    def command_get(self, params):
        ''' <#tag>
        Gets latest tweets by a given tag (Default: #OpenFest2016)
        '''
        # if not params[0]:
        #     params[0] = "#OpenFest2016"

        self.feed = self.twitter.get_tweets_by_tag(config.twitter_conf['TW_DEFAULT_TAG'])
        self.writeresponse(self.feed)


if __name__ == '__main__':
    Handler = TestTelnetHandler

    class EvtletStreamServer(object):
        def __init__(self, addr, handle):
            self.ip = addr[0]
            self.port = addr[1]
            self.handle = handle

        def serve_forever(self):
            eventlet.serve(
            eventlet.listen((self.ip, self.port)),
            self.handle
            )

        # Multi-eventlet server
    server = EvtletStreamServer(
             (TELNET_IP_BINDING, TELNET_PORT_BINDING),
             Handler.streamserver_handle
             )

    logging.info("Starting fttp server at port %d.  (Ctrl-C to stop)" % (TELNET_PORT_BINDING) )
    try:
        server.serve_forever()
    except KeyboardInterrupt:
        logging.info("Server shut down.")