#  This file is part of Headphones.
#
#  Headphones is free software: you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation, either version 3 of the License, or
#  (at your option) any later version.
#
#  Headphones is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with Headphones.  If not, see <http://www.gnu.org/licenses/>.

import sys

import os
import cherrypy
import headphones
from headphones import logger
from headphones.webserve import WebInterface
from headphones.helpers import create_https_certificates


def initialize(options):
    # HTTPS stuff stolen from sickbeard
    enable_https = options['enable_https']
    https_cert = options['https_cert']
    https_key = options['https_key']

    if enable_https:
        # If either the HTTPS certificate or key do not exist, try to make
        # self-signed ones.
        if not (https_cert and os.path.exists(https_cert)) or not (
                https_key and os.path.exists(https_key)):
            if not create_https_certificates(https_cert, https_key):
                logger.warn("Unable to create certificate and key. Disabling "
                            "HTTPS")
                enable_https = False

        if not (os.path.exists(https_cert) and os.path.exists(https_key)):
            logger.warn("Disabled HTTPS because of missing certificate and "
                        "key.")
            enable_https = False

    options_dict = {
        'server.socket_port': options['http_port'],
        'server.socket_host': options['http_host'],
        'server.thread_pool': 10,
        'tools.encode.on': True,
        'tools.encode.encoding': 'utf-8',
        'tools.decode.on': True,
        'log.screen': False,
        'engine.autoreload.on': False,
    }

    if enable_https:
        options_dict['server.ssl_certificate'] = https_cert
        options_dict['server.ssl_private_key'] = https_key
        protocol = "https"
    else:
        protocol = "http"

    logger.info("Starting Headphones web server on %s://%s:%d/", protocol,
                options['http_host'], options['http_port'])
    cherrypy.config.update(options_dict)

    conf = {
        '/': {
            'tools.staticdir.root': os.path.join(headphones.PROG_DIR, 'data'),
            'tools.proxy.on': options['http_proxy']  # pay attention to X-Forwarded-Proto header
        },
        '/interfaces': {
            'tools.staticdir.on': True,
            'tools.staticdir.dir': "interfaces"
        },
        '/images': {
            'tools.staticdir.on': True,
            'tools.staticdir.dir': "images"
        },
        '/css': {
            'tools.staticdir.on': True,
            'tools.staticdir.dir': "css"
        },
        '/js': {
            'tools.staticdir.on': True,
            'tools.staticdir.dir': "js"
        },
        '/favicon.ico': {
            'tools.staticfile.on': True,
            'tools.staticfile.filename': os.path.join(os.path.abspath(
                os.curdir), "images" + os.sep + "favicon.ico")
        },
        '/cache': {
            'tools.staticdir.on': True,
            'tools.staticdir.dir': headphones.CONFIG.CACHE_DIR
        }
    }

    if options['http_password']:
        logger.info("Web server authentication is enabled, username is '%s'",
                    options['http_username'])

        conf['/'].update({
            'tools.auth_basic.on': True,
            'tools.auth_basic.realm': 'Headphones web server',
            'tools.auth_basic.checkpassword': cherrypy.lib.auth_basic.checkpassword_dict({
                options['http_username']: options['http_password']
            })
        })
        conf['/api'] = {'tools.auth_basic.on': False}

    cherrypy.tree.mount(WebInterface(), str(options['http_root']), config=conf)

    try:
        cherrypy.server.start()
    except IOError:
        sys.stderr.write(
            'Failed to start on port: %i. Is something else running?\n' % (options['http_port']))
        sys.exit(1)

    cherrypy.server.wait()
