# Copyright (c) 2003-2010 Ralph Meijer
# See LICENSE for details.

from twisted.application import service
from twisted.python import usage
from twisted.words.protocols.jabber.jid import JID

from wokkel.component import Component
from wokkel.disco import DiscoHandler
from wokkel.generic import FallbackHandler, VersionHandler
from wokkel.iwokkel import IPubSubResource
from wokkel.pubsub import PubSubService

from idavoll import __version__
from idavoll.backend import BackendService

class Options(usage.Options):
    optParameters = [
        ('jid', None, 'pubsub', 'JID this component will be available at'),
        ('secret', None, 'secret', 'Jabber server component secret'),
        ('rhost', None, '127.0.0.1', 'Jabber server host'),
        ('rport', None, '5347', 'Jabber server port'),
        ('backend', None, 'memory', 'Choice of storage backend'),
        ('dbuser', None, None, 'Database user (pgsql backend)'),
        ('dbname', None, 'pubsub', 'Database name (pgsql backend)'),
        ('dbpass', None, None, 'Database password (pgsql backend)'),
        ('dbhost', None, None, 'Database host (pgsql backend)'),
        ('dbport', None, None, 'Database port (pgsql backend)'),
    ]

    optFlags = [
        ('verbose', 'v', 'Show traffic'),
        ('hide-nodes', None, 'Hide all nodes for disco')
    ]

    def postOptions(self):
        if self['backend'] not in ['pgsql', 'memory']:
            raise usage.UsageError, "Unknown backend!"

        self['jid'] = JID(self['jid'])



def makeService(config):
    s = service.MultiService()

    # Create backend service with storage

    if config['backend'] == 'pgsql':
        from twisted.enterprise import adbapi
        from idavoll.pgsql_storage import Storage
        dbpool = adbapi.ConnectionPool('psycopg2',
                                       user=config['dbuser'],
                                       password=config['dbpass'],
                                       database=config['dbname'],
                                       host=config['dbhost'],
                                       port=config['dbport'],
                                       cp_reconnect=True,
                                       client_encoding='utf-8',
                                       )
        st = Storage(dbpool)
    elif config['backend'] == 'memory':
        from idavoll.memory_storage import Storage
        st = Storage()

    bs = BackendService(st)
    bs.setName('backend')
    bs.setServiceParent(s)

    # Set up XMPP server-side component with publish-subscribe capabilities

    cs = Component(config["rhost"], int(config["rport"]),
                   config["jid"].full(), config["secret"])
    cs.setName('component')
    cs.setServiceParent(s)

    cs.factory.maxDelay = 900

    if config["verbose"]:
        cs.logTraffic = True

    FallbackHandler().setHandlerParent(cs)
    VersionHandler('Idavoll', __version__).setHandlerParent(cs)
    DiscoHandler().setHandlerParent(cs)

    resource = IPubSubResource(bs)
    resource.hideNodes = config["hide-nodes"]
    resource.serviceJID = config["jid"]

    ps = PubSubService(resource)
    ps.setHandlerParent(cs)
    resource.pubsubService = ps

    return s