import time
import sys
from twisted.application import internet, service
from twisted.internet import protocol, reactor, defer
from django.db import connection
from django.conf import settings
from src.config.models import ConfigValue
from src.session import SessionProtocol
from src import scheduler
from src import logger
from src import session_mgr
from src import alias_mgr
from src import cmdtable
from src import initial_setup
from src.util import functions_general

class EvenniaService(service.Service):
    def __init__(self):
        self.game_running = True
        sys.path.append('.')

        # Database-specific startup optimizations.
        if settings.DATABASE_ENGINE == "sqlite3":
            self.sqlite3_prep()

        # Wipe our temporary flags on all of the objects.
        cursor = connection.cursor()
        cursor.execute("UPDATE objects_object SET nosave_flags=''")

        # Begin startup debug output.
        print '-'*50

        try:
            # If this fails, this is an empty DB that needs populating.
            ConfigValue.objects.get_configvalue('game_firstrun')
        except ConfigValue.DoesNotExist:
            print ' Game started for the first time, setting defaults.'
            initial_setup.handle_setup()

        self.start_time = time.time()

        print ' %s started on port(s):' % (ConfigValue.objects.get_configvalue('site_name'),)
        for port in settings.GAMEPORTS:
            print '  * %s' % (port)
        
        # Cache the aliases from the database for quick access.
        alias_mgr.load_cmd_aliases()
        
        print '-'*50
        scheduler.start_events()

    """
    BEGIN SERVER STARTUP METHODS
    """
    def sqlite3_prep(self):
        """
        Optimize some SQLite stuff at startup since we can't save it to the
        database.
        """
        cursor = connection.cursor()
        cursor.execute("PRAGMA cache_size=10000")
        cursor.execute("PRAGMA synchronous=OFF")
        cursor.execute("PRAGMA count_changes=OFF")
        cursor.execute("PRAGMA temp_store=2")

    """
    BEGIN GENERAL METHODS
    """
    def shutdown(self, message='The server has been shutdown. Please check back soon.'):
        session_mgr.announce_all(message)
        session_mgr.disconnect_all_sessions()
        reactor.callLater(0, reactor.stop)

    def command_list(self):
        """
        Return a string representing the server's command list.
        """
        clist = cmdtable.GLOBAL_CMD_TABLE.ctable.keys()
        clist.sort()
        return clist

    def reload(self, session):
        """
        Reload modules that don't have any variables that can be reset.
        For changes to the scheduler, server, or session_mgr modules, a cold
        restart is needed.
        """
        reload_list = []

        for mod in reload_list:
            reload(sys.modules[mod])

        session.msg("Modules reloaded.")
        logger.log_infomsg("Modules reloaded by %s." % (session,))

    def getEvenniaServiceFactory(self):
        f = protocol.ServerFactory()
        f.protocol = SessionProtocol
        f.server = self
        return f

    """
    END Server CLASS
    """

application = service.Application('Evennia')
mud_service = EvenniaService()

# Sheet sheet, fire ze missiles!
serviceCollection = service.IServiceCollection(application)
for port in settings.GAMEPORTS:
    internet.TCPServer(port, mud_service.getEvenniaServiceFactory()).setServiceParent(serviceCollection)