#!/usr/bin/python
# -*- coding: utf-8 -*-
#    Copyright 2014 J. Fernando Sánchez Rada - Grupo de Sistemas Inteligentes
#                                                       DIT, UPM
#
#    Licensed under the Apache License, Version 2.0 (the "License");
#    you may not use this file except in compliance with the License.
#    You may obtain a copy of the License at
#
#        http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS,
#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#    See the License for the specific language governing permissions and
#    limitations under the License.
"""
Senpy is a modular sentiment analysis server. This script runs an instance of
the server.

"""

from flask import Flask
from senpy.extensions import Senpy
from tornado.wsgi import WSGIContainer
from tornado.httpserver import HTTPServer
from tornado.ioloop import IOLoop


import logging
import os
import argparse
import senpy

SERVER_PORT = os.environ.get("PORT", 5000)


def main():
    parser = argparse.ArgumentParser(description='Run a Senpy server')
    parser.add_argument(
        '--level',
        '-l',
        metavar='logging_level',
        type=str,
        default="INFO",
        help='Logging level')
    parser.add_argument(
        '--debug',
        '-d',
        action='store_true',
        default=False,
        help='Run the application in debug mode')
    parser.add_argument(
        '--default-plugins',
        action='store_true',
        default=False,
        help='Load the default plugins')
    parser.add_argument(
        '--host',
        type=str,
        default="0.0.0.0",
        help='Use 0.0.0.0 to accept requests from any host.')
    parser.add_argument(
        '--port',
        '-p',
        type=int,
        default=SERVER_PORT,
        help='Port to listen on.')
    parser.add_argument(
        '--plugins-folder',
        '-f',
        type=str,
        default='plugins',
        help='Where to look for plugins.')
    parser.add_argument(
        '--only-install',
        '-i',
        action='store_true',
        default=False,
        help='Do not run a server, only install plugin dependencies')
    parser.add_argument(
        '--version',
        '-v',
        action='store_true',
        default=False,
        help='Output the senpy version and exit')
    args = parser.parse_args()
    if args.version:
        print('Senpy version {}'.format(senpy.__version__))
        exit(1)
    logging.basicConfig()
    rl = logging.getLogger()
    rl.setLevel(getattr(logging, args.level))
    app = Flask(__name__)
    app.debug = args.debug
    sp = Senpy(app, args.plugins_folder, default_plugins=args.default_plugins)
    if args.only_install:
        sp.install_deps()
        return
    sp.activate_all()
    print('Senpy version {}'.format(senpy.__version__))
    print('Server running on port %s:%d. Ctrl+C to quit' % (args.host,
                                                            args.port))
    if not app.debug:
        http_server = HTTPServer(WSGIContainer(app))
        http_server.listen(args.port, address=args.host)
        try:
            IOLoop.instance().start()
        except KeyboardInterrupt:
            print('Bye!')
        http_server.stop()
    else:
        app.run(args.host,
                args.port,
                debug=True)
    sp.deactivate_all()


if __name__ == '__main__':
    main()