#!/usr/bin/python
#-*- coding: utf-8 -*-

# Copyright (c) 2012-2016 Jérôme Poisson
# Copyright (c) 2013-2016 Jérôme Poisson
# Copyright (c) 2003-2011 Ralph Meijer


# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program 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 Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
# --

# This program is based on Idavoll (http://idavoll.ik.nu/),
# originaly written by Ralph Meijer (http://ralphm.net/blog/)
# It is sublicensed under AGPL v3 (or any later version) as allowed by the original
# license.

# --

# Here is a copy of the original license:

# Copyright (c) 2003-2011 Ralph Meijer

# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:

# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


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 import data_form
from wokkel import pubsub
from wokkel import rsm
from wokkel import mam

from sat_pubsub import __version__
from sat_pubsub import const
from sat_pubsub import mam as pubsub_mam
from sat_pubsub.backend import BackendService
from sat_pubsub.privilege import PrivilegesHandler
from sat_pubsub.delegation import DelegationsHandler


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, 'pgsql', '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!"
        if self['backend'] == 'memory':
            raise NotImplementedError('memory backend is not available at the moment')

        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 sat_pubsub.pgsql_storage import Storage
        from psycopg2.extras import NamedTupleConnection
        keys_map = {
            'dbuser': 'user',
            'dbpass': 'password',
            'dbname': 'database',
            'dbhost': 'host',
            'dbport': 'port',
        }
        kwargs = {}
        for config_k, k in keys_map.iteritems():
            v = config.get(config_k)
            if v is None:
                continue
            kwargs[k] = v
        dbpool = adbapi.ConnectionPool('psycopg2',
                                       cp_reconnect=True,
                                       client_encoding='utf-8',
                                       connection_factory=NamedTupleConnection,
                                       **kwargs
                                       )
        st = Storage(dbpool)
    elif config['backend'] == 'memory':
        from sat_pubsub.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(u'SàT Pubsub', __version__).setHandlerParent(cs)
    DiscoHandler().setHandlerParent(cs)

    ph = PrivilegesHandler(config['jid'])
    ph.setHandlerParent(cs)
    bs.privilege = ph

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

    ps = (rsm if const.FLAG_ENABLE_RSM else pubsub).PubSubService(resource)
    ps.setHandlerParent(cs)
    resource.pubsubService = ps

    if const.FLAG_ENABLE_MAM:
        mam_resource = pubsub_mam.MAMResource(bs)
        mam_s = mam.MAMService(mam_resource)
        mam_s.addFilter(data_form.Field(var=const.MAM_FILTER_CATEGORY))
        mam_s.setHandlerParent(cs)

    # XXX: delegation must be instancied at the end,
    #      because it does some MonkeyPatching on handlers
    dh = DelegationsHandler()
    dh.setHandlerParent(cs)
    bs.delegation = dh

    return s