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

# Copyright (c) 2003-2011 Ralph Meijer
# Copyright (c) 2012-2017 Jérôme Poisson


# 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 internet, strports
from twisted.conch import manhole, manhole_ssh
from twisted.cred import portal, checkers
from twisted.web import resource, server

from sat_pubsub import gateway, tap
from sat_pubsub.gateway import RemoteSubscriptionService

class Options(tap.Options):
    optParameters = [
            ('webport', None, '8086', 'Web port'),
    ]



def getManholeFactory(namespace, **passwords):
    def getManHole(_):
        return manhole.Manhole(namespace)

    realm = manhole_ssh.TerminalRealm()
    realm.chainedProtocolFactory.protocolFactory = getManHole
    p = portal.Portal(realm)
    p.registerChecker(
            checkers.InMemoryUsernamePasswordDatabaseDontUse(**passwords))
    f = manhole_ssh.ConchFactory(p)
    return f



def makeService(config):
    s = tap.makeService(config)

    bs = s.getServiceNamed('backend')
    cs = s.getServiceNamed('component')

    # Set up XMPP service for subscribing to remote nodes

    if config['backend'] == 'pgsql':
        from sat_pubsub.pgsql_storage import GatewayStorage
        gst = GatewayStorage(bs.storage.dbpool)
    elif config['backend'] == 'memory':
        from sat_pubsub.memory_storage import GatewayStorage
        gst = GatewayStorage()

    ss = RemoteSubscriptionService(config['jid'], gst)
    ss.setHandlerParent(cs)
    ss.startService()

    # Set up web service

    root = resource.Resource()

    # Set up resources that exposes the backend
    root.putChild('create', gateway.CreateResource(bs, config['jid'],
                                                   config['jid']))
    root.putChild('delete', gateway.DeleteResource(bs, config['jid'],
                                                   config['jid']))
    root.putChild('publish', gateway.PublishResource(bs, config['jid'],
                                                     config['jid']))
    root.putChild('list', gateway.ListResource(bs))

    # Set up resources for accessing remote pubsub nodes.
    root.putChild('subscribe', gateway.RemoteSubscribeResource(ss))
    root.putChild('unsubscribe', gateway.RemoteUnsubscribeResource(ss))
    root.putChild('items', gateway.RemoteItemsResource(ss))

    site = server.Site(root)
    w = internet.TCPServer(int(config['webport']), site)
    w.setServiceParent(s)

    # Set up a manhole

    namespace = {'service': s,
                 'component': cs,
                 'backend': bs,
                 'root': root}

    f = getManholeFactory(namespace, admin='admin')
    manholeService = strports.service('2222', f)
    manholeService.setServiceParent(s)

    return s