#!/usr/bin/env python
#
# This file is part of SickGear.
#
# SickGear 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.
#
# SickGear 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 SickGear.  If not, see <http://www.gnu.org/licenses/>.

# Check needed software dependencies to nudge users to fix their setup
import codecs
import datetime
import errno
import getopt
import os
import signal
import sys
import shutil
import time
import threading
import warnings

warnings.filterwarnings('ignore', module=r'.*bs4_parser.*', message='.*No parser was explicitly specified.*')
warnings.filterwarnings('ignore', module=r'.*Cheetah.*')
warnings.filterwarnings('ignore', module=r'.*connectionpool.*', message='.*certificate verification.*')
warnings.filterwarnings('ignore', module=r'.*fuzzywuzzy.*')
warnings.filterwarnings('ignore', module=r'.*ssl_.*', message='.*SSLContext object.*')
warnings.filterwarnings('ignore', module=r'.*zoneinfo.*', message='.*file or directory.*')
warnings.filterwarnings('ignore', message='.*deprecated in cryptography.*')

versions = [((3, 8, 2), (3, 8, 18)),
            ((3, 9, 0), (3, 9, 2)), ((3, 9, 4), (3, 9, 18)),
            ((3, 10, 0), (3, 12, 2))]  # inclusive version ranges
if not any(list(map(lambda v: v[0] <= sys.version_info[:3] <= v[1], versions))) and not int(os.environ.get('PYT', 0)):
    major, minor, micro = sys.version_info[:3]
    print('Python %s.%s.%s detected.' % (major, minor, micro))
    print('Sorry, SickGear requires a Python version %s' % ', '.join(map(
        lambda r: '%s - %s' % tuple(map(lambda v: str(v).replace(',', '.')[1:-1], r)), versions)))
    sys.exit(1)

sys.path.insert(1, os.path.abspath(os.path.join(os.path.dirname(__file__), 'lib')))
is_win = 'win' == sys.platform[0:3]

try:
    try:
        py_cache_path = os.path.normpath(os.path.join(os.path.dirname(__file__), '__pycache__'))
        for pf in ['_cleaner.pyc', '_cleaner.pyo']:
            cleaner_file = os.path.normpath(os.path.join(os.path.normpath(os.path.dirname(__file__)), pf))
            if os.path.isfile(cleaner_file):
                os.remove(cleaner_file)
        if os.path.isdir(py_cache_path):
            shutil.rmtree(py_cache_path)
    except (BaseException, Exception):
        pass
    import _cleaner
    from sickgear import piper
except (BaseException, Exception):
    pass

try:
    import Cheetah
except (BaseException, Exception):
    print('The Python module CT3 (Cheetah) is required')
    if is_win:
        print('(1) However, this first run may have just installed it, so try to simply rerun sickgear.py again')
        print('(2) If this output is a rerun of (1) then open a command line prompt and manually install using...')
    else:
        print('Manually install using...')
    print('cd <sickgear_installed_folder>')
    print('python -m pip install --user -r requirements.txt')
    print('python sickgear.py')
    sys.exit(1)

# Compatibility fixes for Windows
if is_win:
    codecs.register(lambda name: codecs.lookup('utf-8') if name == 'cp65001' else None)

# We only need this for compiling an EXE
from multiprocessing import freeze_support

from configobj import ConfigObj
# noinspection PyPep8Naming
from encodingKludge import SYS_ENCODING
from exceptions_helper import ex
import sickgear
from sickgear import db, logger, name_cache, network_timezones
from sickgear.event_queue import Events
from sickgear.tv import TVShow
from sickgear.webserveInit import WebServer

from six import integer_types, iteritems

throwaway = datetime.datetime.strptime('20110101', '%Y%m%d')
rollback_loaded = None

for signal_type in [signal.SIGTERM, signal.SIGINT] + ([] if not is_win else [signal.SIGBREAK]):
    signal.signal(signal_type, lambda signum, void: sickgear.sig_handler(signum=signum, _=void))


class SickGear(object):
    def __init__(self):
        # system event callback for shutdown/restart
        sickgear.events = Events(self.shutdown)

        # daemon constants
        self.run_as_daemon = False
        self.create_pid = False
        self.pid_file = ''

        self.run_as_systemd = False
        self.console_logging = False

        # webserver constants
        self.webserver = None
        self.force_update = False
        self.forced_port = None
        self.no_launch = False

        self.web_options = None
        self.webhost = None
        self.start_port = None
        self.log_dir = None

    @staticmethod
    def help_message():
        """
        print help message for commandline options
        """
        global is_win
        help_msg = ['']
        help_msg += ['Usage: %s <option> <another option>\n' % sickgear.MY_FULLNAME]
        help_msg += ['Options:\n']

        help_tmpl = '    %-10s%-17s%s'
        for ln in [
            ('-h', '--help', 'Prints this message'),
            ('-f', '--forceupdate', 'Force update all shows in the DB (from tvdb) on startup'),
            ('-q', '--quiet', 'Disables logging to console'),
            ('', '--nolaunch', 'Suppress launching web browser on startup')
        ]:
            help_msg += [help_tmpl % ln]

        if is_win:
            for ln in [
                ('-d', '--daemon', 'Running as daemon is not supported on Windows'),
                ('', '', 'On Windows, --daemon is substituted with: --quiet --nolaunch')
            ]:
                help_msg += [help_tmpl % ln]
        else:
            for ln in [
                ('-d', '--daemon', 'Run as double forked daemon (includes options --quiet --nolaunch)'),
                ('-s', '--systemd', 'Run as systemd service (includes options --quiet --nolaunch)'),
                ('', '--pidfile=<path>', 'Combined with --daemon creates a pidfile (full path including filename)')
            ]:
                help_msg += [help_tmpl % ln]

        for ln in [
            ('-p <port>', '--port=<port>', 'Override default/configured port to listen on'),
            ('', '--datadir=<path>', 'Override folder (full path) as location for'),
            ('', '', 'storing database, configfile, cache, logfiles'),
            ('', '', 'Default: %s' % sickgear.PROG_DIR),
            ('', '--config=<path>', 'Override config filename (full path including filename)'),
            ('', '', 'to load configuration from'),
            ('', '', 'Default: config.ini in %s or --datadir location' % sickgear.PROG_DIR),
            ('', '--noresize', 'Prevent resizing of the banner/posters even if PIL is installed')
        ]:
            help_msg += [help_tmpl % ln]

        return '\n'.join(help_msg)

    @staticmethod
    def execute_rollback(mo, max_v, load_msg):
        global rollback_loaded
        try:
            if None is rollback_loaded:
                rollback_loaded = db.get_rollback_module()
            if None is not rollback_loaded:
                rc = rollback_loaded.__dict__[mo]()
                rc.load_msg = load_msg
                rc.run(max_v)
            else:
                print('ERROR: Could not download Rollback Module.')
        except (BaseException, Exception):
            pass

    def start(self):
        global is_win
        # do some preliminary stuff
        sickgear.MY_FULLNAME = os.path.normpath(os.path.abspath(__file__))
        sickgear.PROG_DIR = os.path.dirname(sickgear.MY_FULLNAME)
        sickgear.DATA_DIR = sickgear.PROG_DIR
        sickgear.MY_ARGS = sys.argv[1:]
        sickgear.SYS_ENCODING = SYS_ENCODING
        legacy_runner = globals().get('_legacy_sickgear_runner')
        if not legacy_runner:
            import __main__
            legacy_runner = 'bear' in (getattr(__main__, '__file__', False) or '').split(os.sep)[-1].lower()
        sickgear.MEMCACHE['DEPRECATE_SB_RUNNER'] = legacy_runner

        # Need console logging for sickgear.py
        self.console_logging = not hasattr(sys, 'frozen')

        # Rename the main thread
        threading.current_thread().name = 'MAIN'

        try:
            opts, args = getopt.getopt(sys.argv[1:], 'hfqdsp::',
                                       ['help', 'forceupdate', 'quiet', 'nolaunch', 'daemon', 'systemd', 'pidfile=',
                                        'port=', 'datadir=', 'config=', 'noresize', 'update-restart', 'update-pkg'])
        except getopt.GetoptError:
            sys.exit(self.help_message())

        for o, a in opts:
            # Prints help message
            if o in ('-h', '--help'):
                sys.exit(self.help_message())

            # For now, we'll just silence the logging
            if o in ('-q', '--quiet'):
                self.console_logging = False

            # Should we update (from indexer) all shows in the DB right away?
            if o in ('-f', '--forceupdate'):
                self.force_update = True

            # Suppress launching web browser
            # Needed for OSes without default browser assigned
            # Prevent duplicate browser window when restarting in the app
            if o in ('--nolaunch',):
                self.no_launch = True

            # Override default/configured port
            if o in ('-p', '--port'):
                try:
                    self.forced_port = int(a)
                except ValueError:
                    sys.exit('Port: %s is not a number. Exiting.' % a)

            # Run as a double forked daemon
            if o in ('-d', '--daemon'):
                self.run_as_daemon = True
                # When running as daemon disable console_logging and don't start browser
                self.console_logging = False
                self.no_launch = True

                if is_win:
                    self.run_as_daemon = False

            # Run as a systemd service
            if o in ('-s', '--systemd') and not is_win:
                self.run_as_systemd = True
                self.run_as_daemon = False
                self.console_logging = False
                self.no_launch = True

            # Write a pidfile if requested
            if o in ('--pidfile',):
                self.create_pid = True
                self.pid_file = str(a)

                # If the pidfile already exists, sickgear may still be running, so exit
                if os.path.exists(self.pid_file):
                    sys.exit('PID file: %s already exists. Exiting.' % self.pid_file)

            # Specify folder to load the config file from
            if o in ('--config',):
                sickgear.CONFIG_FILE = os.path.abspath(a)

            # Specify folder to use as the data dir
            if o in ('--datadir',):
                sickgear.DATA_DIR = os.path.abspath(a)

            # Prevent resizing of the banner/posters even if PIL is installed
            if o in ('--noresize',):
                sickgear.NO_RESIZE = True

        # The pidfile is only useful in daemon mode, make sure we can write the file properly
        if self.create_pid:
            if self.run_as_daemon:
                pid_dir = os.path.dirname(self.pid_file)
                if not os.access(pid_dir, os.F_OK):
                    sys.exit(f"PID dir: {pid_dir} doesn't exist. Exiting.")
                if not os.access(pid_dir, os.W_OK):
                    sys.exit(f'PID dir: {pid_dir} must be writable (write permissions). Exiting.')

            else:
                if self.console_logging:
                    print('Not running in daemon mode. PID file creation disabled')

                self.create_pid = False

        # If they don't specify a config file then put it in the data dir
        if not sickgear.CONFIG_FILE:
            sickgear.CONFIG_FILE = os.path.join(sickgear.DATA_DIR, 'config.ini')

        # Make sure that we can create the data dir
        if not os.access(sickgear.DATA_DIR, os.F_OK):
            try:
                os.makedirs(sickgear.DATA_DIR, 0o744)
            except os.error:
                sys.exit(f'Unable to create data directory: {sickgear.DATA_DIR} Exiting.')

        # Make sure we can write to the data dir
        if not os.access(sickgear.DATA_DIR, os.W_OK):
            sys.exit(f'Data directory: {sickgear.DATA_DIR} must be writable (write permissions). Exiting.')

        # Make sure we can write to the config file
        if not os.access(sickgear.CONFIG_FILE, os.W_OK):
            if os.path.isfile(sickgear.CONFIG_FILE):
                sys.exit(f'Config file: {sickgear.CONFIG_FILE} must be writeable (write permissions). Exiting.')
            elif not os.access(os.path.dirname(sickgear.CONFIG_FILE), os.W_OK):
                sys.exit(f'Config file directory: {os.path.dirname(sickgear.CONFIG_FILE)}'
                         f' must be writeable (write permissions). Exiting')
        os.chdir(sickgear.DATA_DIR)

        if self.console_logging:
            print(f'Starting up SickGear from {sickgear.CONFIG_FILE}')

        # Load the config and publish it to the sickgear package
        if not os.path.isfile(sickgear.CONFIG_FILE):
            print(f'Unable to find "{sickgear.CONFIG_FILE}", all settings will be default!')

        sickgear.CFG = ConfigObj(sickgear.CONFIG_FILE)
        try:
            stack_size = int(sickgear.CFG['General']['stack_size'])
        except (BaseException, Exception):
            stack_size = None

        if stack_size:
            try:
                threading.stack_size(stack_size)
            except (BaseException, Exception) as er:
                print('Stack Size %s not set: %s' % (stack_size, ex(er)))

        if self.run_as_daemon:
            self.daemonize()

        # Get PID
        sickgear.PID = os.getpid()

        # Initialize the config
        sickgear.initialize(console_logging=self.console_logging)

        if self.forced_port:
            logger.log(f'Forcing web server to port {self.forced_port}')
            self.start_port = self.forced_port
        else:
            self.start_port = sickgear.WEB_PORT

        if sickgear.WEB_LOG:
            self.log_dir = sickgear.LOG_DIR
        else:
            self.log_dir = None

        # sickgear.WEB_HOST is available as a configuration value in various
        # places but is not configurable. It is supported here for historic reasons.
        if sickgear.WEB_HOST and '0.0.0.0' != sickgear.WEB_HOST:
            self.webhost = sickgear.WEB_HOST
        else:
            self.webhost = (('0.0.0.0', '::')[sickgear.WEB_IPV6], '')[sickgear.WEB_IPV64]

        # web server options
        self.web_options = dict(
            host=self.webhost,
            port=int(self.start_port),
            web_root=sickgear.WEB_ROOT,
            data_root=os.path.join(sickgear.PROG_DIR, 'gui', sickgear.GUI_NAME),
            log_dir=self.log_dir,
            username=sickgear.WEB_USERNAME,
            password=sickgear.WEB_PASSWORD,
            handle_reverse_proxy=sickgear.HANDLE_REVERSE_PROXY,
            enable_https=False,
            https_cert=None,
            https_key=None,
        )
        if sickgear.ENABLE_HTTPS:
            self.web_options.update(dict(
                enable_https=sickgear.ENABLE_HTTPS,
                https_cert=os.path.join(sickgear.PROG_DIR, sickgear.HTTPS_CERT),
                https_key=os.path.join(sickgear.PROG_DIR, sickgear.HTTPS_KEY)
            ))

        # start web server
        try:
            # used to check if existing SG instances have been started
            sickgear.helpers.wait_for_free_port(
                sickgear.WEB_IPV6 and '::1' or self.web_options['host'], self.web_options['port'])

            self.webserver = WebServer(options=self.web_options)
            self.webserver.start()
            # wait for server thread to be started
            self.webserver.wait_server_start()
            sickgear.started = True
        except (BaseException, Exception):
            logger.error(f'Unable to start web server, is something else running on port {self.start_port:d}?')
            if self.run_as_systemd:
                self.exit(0)
            if sickgear.LAUNCH_BROWSER and not self.no_launch:
                logger.error('Launching browser and exiting')
                sickgear.launch_browser(self.start_port)
            self.exit(1)

        # Launch browser
        if sickgear.LAUNCH_BROWSER and not self.no_launch:
            sickgear.launch_browser(self.start_port)

        # send pid of sg instance to ui
        sickgear.classes.loading_msg.set_msg_progress('Process-id', sickgear.PID)

        # check all db versions
        for d, min_v, max_v, base_v, mo in [
            ('failed.db', sickgear.failed_db.MIN_DB_VERSION, sickgear.failed_db.MAX_DB_VERSION,
             sickgear.failed_db.TEST_BASE_VERSION, 'FailedDb'),
            ('cache.db', sickgear.cache_db.MIN_DB_VERSION, sickgear.cache_db.MAX_DB_VERSION,
             sickgear.cache_db.TEST_BASE_VERSION, 'CacheDb'),
            ('sickbeard.db', sickgear.mainDB.MIN_DB_VERSION, sickgear.mainDB.MAX_DB_VERSION,
             sickgear.mainDB.TEST_BASE_VERSION, 'MainDb')
        ]:
            cur_db_version = db.DBConnection(d).check_db_version()

            # handling of standalone TEST db versions
            load_msg = 'Downgrading %s to production version' % d
            if 100000 <= cur_db_version != max_v:
                sickgear.classes.loading_msg.set_msg_progress(load_msg, 'Rollback')
                print('Your [%s] database version (%s) is a test db version and doesn\'t match SickGear required '
                      'version (%s), downgrading to production db' % (d, cur_db_version, max_v))
                self.execute_rollback(mo, max_v, load_msg)
                cur_db_version = db.DBConnection(d).check_db_version()
                if 100000 <= cur_db_version:
                    print('Rollback to production failed.')
                    sys.exit('If you have used other forks, your database may be unusable due to their changes')
                if 100000 <= max_v and None is not base_v:
                    max_v = base_v  # set max_v to the needed base production db for test_db
                print(f'Rollback to production of [{d}] successful.')
                sickgear.classes.loading_msg.set_msg_progress(load_msg, 'Finished')

            # handling of production version higher than current base of test db
            if isinstance(base_v, integer_types) and max_v >= 100000 > cur_db_version > base_v:
                sickgear.classes.loading_msg.set_msg_progress(load_msg, 'Rollback')
                print('Your [%s] database version (%s) is a db version and doesn\'t match SickGear required '
                      'version (%s), downgrading to production base db' % (d, cur_db_version, max_v))
                self.execute_rollback(mo, base_v, load_msg)
                cur_db_version = db.DBConnection(d).check_db_version()
                if 100000 <= cur_db_version:
                    print('Rollback to production base failed.')
                    sys.exit('If you have used other forks, your database may be unusable due to their changes')
                if 100000 <= max_v and None is not base_v:
                    max_v = base_v  # set max_v to the needed base production db for test_db
                print(f'Rollback to production base of [{d}] successful.')
                sickgear.classes.loading_msg.set_msg_progress(load_msg, 'Finished')

            # handling of production db versions
            if 0 < cur_db_version < 100000:
                if cur_db_version < min_v:
                    print(f'Your [{d}] database version ({cur_db_version})'
                          f' is too old to migrate from with this version of SickGear')
                    sys.exit('Upgrade using a previous version of SG first,'
                             ' or start with no database file to begin fresh')
                if cur_db_version > max_v:
                    sickgear.classes.loading_msg.set_msg_progress(load_msg, 'Rollback')
                    print(f'Your [{d}] database version ({cur_db_version}) has been incremented past what this'
                          f' version of SickGear supports. Trying to rollback now. Please wait...')
                    self.execute_rollback(mo, max_v, load_msg)
                    if db.DBConnection(d).check_db_version() > max_v:
                        print('Rollback failed.')
                        sys.exit('If you have used other forks, your database may be unusable due to their changes')
                    print(f'Rollback of [{d}] successful.')
                    sickgear.classes.loading_msg.set_msg_progress(load_msg, 'Finished')

        # migrate the config if it needs it
        from sickgear.config import ConfigMigrator
        migrator = ConfigMigrator(sickgear.CFG)
        if migrator.config_version > migrator.expected_config_version:
            self.execute_rollback('ConfigFile', migrator.expected_config_version, 'Downgrading config.ini')
            migrator = ConfigMigrator(sickgear.CFG)
        migrator.migrate_config()

        # free memory
        global rollback_loaded
        rollback_loaded = None
        sickgear.classes.loading_msg.message = 'Init SickGear'

        # Initialize the threads and other stuff
        sickgear.initialize(console_logging=self.console_logging)

        # Check if we need to perform a restore first
        restore_dir = os.path.join(sickgear.DATA_DIR, 'restore')
        if os.path.exists(restore_dir):
            sickgear.classes.loading_msg.message = 'Restoring files'
            if self.restore(restore_dir, sickgear.DATA_DIR):
                logger.log('Restore successful...')
            else:
                logger.log_error_and_exit('Restore FAILED!')

        # refresh network timezones
        sickgear.classes.loading_msg.message = 'Checking network timezones'
        network_timezones.update_network_dict()

        update_arg = '--update-restart'
        manual_update_arg = '--update-pkg'
        if update_arg not in sickgear.MY_ARGS and sickgear.UPDATES_TODO \
                and (manual_update_arg in sickgear.MY_ARGS or sickgear.UPDATE_PACKAGES_AUTO):
            sickgear.MEMCACHE['update_restart'] = piper.pip_update(
                sickgear.classes.loading_msg, sickgear.UPDATES_TODO, sickgear.DATA_DIR)
            sickgear.UPDATES_TODO = dict()
            sickgear.save_config()

        if manual_update_arg in sickgear.MY_ARGS:
            sickgear.MY_ARGS.remove(manual_update_arg)

        if not sickgear.MEMCACHE.get('update_restart'):
            # Build from the DB to start with
            sickgear.classes.loading_msg.message = 'Loading shows from db'
            sickgear.indexermapper.indexer_list = [i for i in sickgear.TVInfoAPI().all_sources
                                                   if sickgear.TVInfoAPI(i).config.get('show_url')
                                                   and True is not sickgear.TVInfoAPI(i).config.get('people_only')]
            self.load_shows_from_db()
            sickgear.MEMCACHE['history_tab'] = sickgear.webserve.History.menu_tab(
                sickgear.MEMCACHE['history_tab_limit'])
            if not db.DBConnection().has_flag('ignore_require_cleaned'):
                from sickgear.show_updater import clean_ignore_require_words
                sickgear.classes.loading_msg.message = 'Cleaning ignore/require words lists'
                clean_ignore_require_words()
                db.DBConnection().set_flag('ignore_require_cleaned')

        # Fire up threads
        sickgear.classes.loading_msg.message = 'Starting threads'
        sickgear.start()

        if sickgear.MEMCACHE.get('update_restart'):
            sickgear.MY_ARGS.append(update_arg)
            sickgear.classes.loading_msg.message = 'Restarting SickGear after update'
            time.sleep(3)
            sickgear.restart(soft=False)
            # restart wait loop
            while True:
                time.sleep(1)

        if update_arg in sickgear.MY_ARGS:
            sickgear.MY_ARGS.remove(update_arg)

        # Build internal name cache
        sickgear.classes.loading_msg.message = 'Build name cache'
        name_cache.build_name_cache()

        # load all ids from xem
#        sickgear.classes.loading_msg.message = 'Loading xem data'
#        startup_background_tasks = threading.Thread(name='XEMUPDATER', target=sickgear.scene_exceptions.ReleaseMap().fetch_xem_ids)
#        startup_background_tasks.start()

        sickgear.classes.loading_msg.message = 'Checking history'
        # check history snatched_proper update
        if not db.DBConnection().has_flag('history_snatch_proper'):
            # noinspection PyUnresolvedReferences
            history_snatched_proper_task = threading.Thread(name='UPGRADE-HISTORY-ACTION',
                                                            target=sickgear.history.history_snatched_proper_fix)
            history_snatched_proper_task.start()

        if not db.DBConnection().has_flag('kodi_nfo_default_removed'):
            sickgear.metadata.kodi.remove_default_attr()
        if not db.DBConnection().has_flag('kodi_nfo_rebuild_uniqueid'):
            sickgear.metadata.kodi.rebuild_nfo()

        my_db = db.DBConnection()
        sql_result = my_db.select('SELECT * FROM tv_src_switch WHERE status = 0')
        if sql_result:
            switching = True
            l_msg = 'Adding shows that are switching tv source to queue'
            total_result = len(sql_result)

            def q_switch(switch):
                try:
                    _show_obj = sickgear.helpers.find_show_by_id({switch['new_indexer']: switch['new_indexer_id']})
                    if _show_obj:
                        sickgear.show_queue_scheduler.action.switch_show(
                            show_obj=_show_obj,
                            new_tvid=switch['new_indexer'], new_prodid=switch['new_indexer_id'],
                            force_id=bool(switch['force_id']), uid=switch['uid'],
                            set_pause=bool(switch['set_pause']), mark_wanted=bool(switch['mark_wanted']), resume=True,
                            old_tvid=switch['old_indexer'], old_prodid=switch['old_indexer_id']
                        )
                except (BaseException, Exception):
                    pass

            sickgear.classes.loading_msg.set_msg_progress(l_msg, '0/%s' % total_result)
            for i, cur_switch in enumerate(sql_result, 1):
                sickgear.classes.loading_msg.set_msg_progress(l_msg, '%s/%s' % (i, total_result))
                try:
                    show_obj = sickgear.helpers.find_show_by_id(
                        {cur_switch['old_indexer']: cur_switch['old_indexer_id']})
                except (BaseException, Exception):
                    if cur_switch['new_indexer_id']:
                        # show id was already switched, but not finished updated, so queue as update
                        q_switch(cur_switch)
                    continue
                if show_obj:
                    try:
                        sickgear.show_queue_scheduler.action.switch_show(
                            show_obj=show_obj,
                            new_tvid=cur_switch['new_indexer'], new_prodid=cur_switch['new_indexer_id'],
                            force_id=bool(cur_switch['force_id']), uid=cur_switch['uid'],
                            set_pause=bool(cur_switch['set_pause']), mark_wanted=bool(cur_switch['mark_wanted'])
                        )
                    except (BaseException, Exception):
                        continue
                elif cur_switch['new_indexer_id']:
                    # show id was already switched, but not finished updated, so resume
                    q_switch(cur_switch)
        else:
            switching = False

        # Start an update if we're supposed to
        if not switching and (self.force_update or sickgear.UPDATE_SHOWS_ON_START):
            sickgear.classes.loading_msg.message = 'Starting a forced show update'
            background_start_forced_show_update = threading.Thread(name='STARTUP-FORCE-SHOW-UPDATE',
                                                                   target=sickgear.update_show_scheduler.action.run)
            background_start_forced_show_update.start()

        sickgear.classes.loading_msg.message = 'Switching to default web server'
        time.sleep(2)
        self.webserver.switch_handlers()

        # main loop
        while 1:
            time.sleep(1)

    def daemonize(self):
        """
        Fork off as a daemon
        """
        # pylint: disable=E1101
        # Make a non-session-leader child process
        try:
            pid = os.fork()  # only available in UNIX
            if 0 != pid:
                self.exit(0)
        except OSError as er:
            sys.stderr.write('fork #1 failed: %d (%s)\n' % (er.errno, er.strerror))
            sys.exit(1)

        os.setsid()  # only available in UNIX

        # Make sure I can read my own files and shut out others
        prev = os.umask(0)
        os.umask(prev and int('077', 8))

        # Make the child a session-leader by detaching from the terminal
        try:
            pid = os.fork()  # only available in UNIX
            if 0 != pid:
                self.exit(0)
        except OSError as er:
            sys.stderr.write('fork #2 failed: %d (%s)\n' % (er.errno, er.strerror))
            sys.exit(1)

        # Write pid
        if self.create_pid:
            pid = str(os.getpid())
            logger.log(f'Writing PID: {pid} to {self.pid_file}')
            try:
                os.fdopen(os.open(self.pid_file, os.O_CREAT | os.O_WRONLY, 0o644), 'w').write('%s\n' % pid)
            except (BaseException, Exception) as er:
                logger.log_error_and_exit('Unable to write PID file: %s Error: %s [%s]' % (
                    self.pid_file, er.strerror, er.errno))

        # Redirect all output
        sys.stdout.flush()
        sys.stderr.flush()

        devnull = getattr(os, 'devnull', '/dev/null')
        stdin = open(devnull, 'r')
        stdout = open(devnull, 'a+')
        stderr = open(devnull, 'a+')
        os.dup2(stdin.fileno(), sys.stdin.fileno())
        os.dup2(stdout.fileno(), sys.stdout.fileno())
        os.dup2(stderr.fileno(), sys.stderr.fileno())

    @staticmethod
    def remove_pid_file(pidfile):
        try:
            if os.path.exists(pidfile):
                os.remove(pidfile)

        except (IOError, OSError):
            return False

        return True

    @staticmethod
    def load_shows_from_db():
        """
        Populates the showList with shows from the database
        """

        logger.log('Loading initial show list')

        my_db = db.DBConnection(row_type='dict')
        sql_result = my_db.select(
            """
            SELECT tv_shows.indexer AS tv_id, tv_shows.indexer_id AS prod_id, tv_shows.*,
             ii.akas AS ii_akas, 
             ii.certificates AS ii_certificates,
             ii.countries AS ii_countries, ii.country_codes AS ii_country_codes,
             ii.genres AS ii_genres, ii.imdb_id AS ii_imdb_id,
             ii.indexer AS ii_indexer, ii.indexer_id AS ii_indexer_id,
             ii.last_update AS ii_ii_last_update,
             ii.rating AS ii_rating, ii.runtimes AS ii_runtimes,
             ii.is_mini_series AS ii_is_mini_series, ii.episode_count AS ii_episode_count,
             ii.title AS ii_title, ii.votes AS ii_votes, ii.year AS ii_year,
             tsnf.fail_count AS tsnf_fail_count, tsnf.indexer AS tsnf_indexer,
             tsnf.indexer_id AS tsnf_indexer_id, tsnf.last_check AS tsnf_last_check,
             tsnf.last_success AS tsnf_last_success
            FROM tv_shows
            LEFT JOIN imdb_info ii
             ON tv_shows.indexer = ii.indexer AND tv_shows.indexer_id = ii.indexer_id
            LEFT JOIN tv_shows_not_found tsnf
             ON tv_shows.indexer = tsnf.indexer AND tv_shows.indexer_id = tsnf.indexer_id
            """)
        sickgear.showList = []
        sickgear.showDict = {}
        for cur_result in sql_result:
            try:
                tv_id = int(cur_result['tv_id'])
                prod_id = int(cur_result['prod_id'])
                if cur_result['ii_indexer_id']:
                    imdb_info_sql = {_fk.replace('ii_', ''): _fv for _fk, _fv in iteritems(cur_result)
                                     if _fk.startswith('ii_')}
                else:
                    imdb_info_sql = None
                show_obj = TVShow(tv_id, prod_id, show_result=cur_result, imdb_info_result=imdb_info_sql)
                if cur_result['tsnf_indexer_id']:
                    failed_result = {_fk.replace('tsnf_', ''): _fv for _fk, _fv in iteritems(cur_result)
                                     if _fk.startswith('tsnf_')}
                    show_obj.helper_load_failed_db(sql_result=failed_result)
                sickgear.showList.append(show_obj)
                sickgear.showDict[show_obj.sid_int] = show_obj
                _ = show_obj.ids
            except (BaseException, Exception) as err:
                logger.error('There was an error creating the show in %s: %s' % (cur_result['location'], ex(err)))
        sickgear.webserve.Home.make_showlist_unique_names()

    @staticmethod
    def restore(src_dir, dst_dir):
        try:
            for filename in os.listdir(src_dir):
                src_file = os.path.join(src_dir, filename)
                dst_file = os.path.join(dst_dir, filename)
                bak_file = os.path.join(dst_dir, '%s.bak' % filename)
                shutil.move(dst_file, bak_file)
                shutil.move(src_file, dst_file)

            os.rmdir(src_dir)
            return True
        except (BaseException, Exception):
            return False

    def shutdown(self, ev_type):
        logger.debug(f'Shutdown ev_type:{ev_type}, sickgear.started:{sickgear.started}')
        if sickgear.started:
            # stop all tasks
            sickgear.halt()

            # save all shows to DB
            sickgear.save_all()

            # shutdown web server
            if self.webserver:
                logger.log('Shutting down Tornado')
                self.webserver.shut_down()
                try:
                    self.webserver.join(10)
                except (BaseException, Exception):
                    pass

            # if run as daemon delete the pidfile
            if self.run_as_daemon and self.create_pid:
                self.remove_pid_file(self.pid_file)

            if sickgear.events.SystemEvent.RESTART == ev_type:

                popen_list = []

                if sickgear.update_software_scheduler.action.install_type in ('git', 'source'):
                    popen_list = [sys.executable, sickgear.MY_FULLNAME]

                if popen_list:
                    popen_list += sickgear.MY_ARGS

                    if self.run_as_systemd:
                        logger.log(f'Restarting SickGear with exit(1) handler and {popen_list}')
                        logger.close()
                        self.exit(1)

                    if '--nolaunch' not in popen_list:
                        popen_list += ['--nolaunch']
                    logger.log(f'Restarting SickGear with {popen_list}')
                    logger.close()
                    from _23 import Popen
                    with Popen(popen_list, cwd=os.getcwd()):
                        self.exit(0)

        # system exit
        self.exit(0)

    @staticmethod
    def exit(code):
        # noinspection PyProtectedMember,PyUnresolvedReferences
        os._exit(code)


if '__main__' == __name__:
    freeze_support()
    try:
        try:
            # start SickGear
            SickGear().start()
        except IOError as e:
            if e.errno != errno.EINTR:
                raise
    except SystemExit as e:
        print('%s' % ex(e))
    except (BaseException, Exception) as e:
        import traceback
        print(traceback.format_exc())
        logger.log('SickGear.Start() exception caught %s: %s' % (ex(e), traceback.format_exc()))