# Copyright (C) 2018 Philipp Hörist <philipp AT hoerist.com>
#
# This file is part of nbxmpp.
#
# This program 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.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; If not, see <http://www.gnu.org/licenses/>.

from nbxmpp.namespaces import Namespace
from nbxmpp.protocol import NodeProcessed
from nbxmpp.structs import StanzaHandler
from nbxmpp.task import iq_request_task
from nbxmpp.errors import MalformedStanzaError
from nbxmpp.modules.base import BaseModule
from nbxmpp.modules.util import raise_if_error
from nbxmpp.modules.util import finalize
from nbxmpp.modules.bookmarks.util import parse_bookmark
from nbxmpp.modules.bookmarks.util import build_conference_node


BOOKMARK_OPTIONS = {
    'pubsub#notify_delete': 'true',
    'pubsub#notify_retract': 'true',
    'pubsub#persist_items': 'true',
    'pubsub#max_items': 'max',
    'pubsub#access_model': 'whitelist',
    'pubsub#send_last_published_item': 'never',
}


class NativeBookmarks(BaseModule):

    _depends = {
        'retract': 'PubSub',
        'publish': 'PubSub',
        'request_items': 'PubSub',
    }

    def __init__(self, client):
        BaseModule.__init__(self, client)

        self._client = client
        self.handlers = [
            StanzaHandler(name='message',
                          callback=self._process_pubsub_bookmarks,
                          ns=Namespace.PUBSUB_EVENT,
                          priority=16),
        ]

    def _process_pubsub_bookmarks(self, _client, _stanza, properties):
        if not properties.is_pubsub_event:
            return

        if properties.pubsub_event.node != Namespace.BOOKMARKS_1:
            return

        item = properties.pubsub_event.item
        if item is None:
            # Retract, Deleted or Purged
            return

        try:
            bookmark_item = parse_bookmark(item)
        except MalformedStanzaError as error:
            self._log.warning(error)
            self._log.warning(error.stanza)
            raise NodeProcessed

        pubsub_event = properties.pubsub_event._replace(data=bookmark_item)
        self._log.info('Received bookmark item from: %s', properties.jid)
        self._log.info(bookmark_item)

        properties.pubsub_event = pubsub_event

    @iq_request_task
    def request_bookmarks(self):
        _task = yield

        items = yield self.request_items(Namespace.BOOKMARKS_1)
        raise_if_error(items)

        bookmarks = []
        for item in items:
            try:
                bookmark_item = parse_bookmark(item)
            except MalformedStanzaError as error:
                self._log.warning(error)
                self._log.warning(error.stanza)
                continue

            bookmarks.append(bookmark_item)

        for bookmark in bookmarks:
            self._log.info(bookmark)

        yield bookmarks

    @iq_request_task
    def retract_bookmark(self, bookmark_jid):
        task = yield

        self._log.info('Retract Bookmark: %s', bookmark_jid)

        result = yield self.retract(Namespace.BOOKMARKS_1, str(bookmark_jid))
        yield finalize(task, result)

    @iq_request_task
    def store_bookmarks(self, bookmarks):
        _task = yield

        self._log.info('Store Bookmarks')

        for bookmark in bookmarks:
            self.publish(Namespace.BOOKMARKS_1,
                         build_conference_node(bookmark),
                         id_=str(bookmark.jid),
                         options=BOOKMARK_OPTIONS,
                         force_node_options=True)

        yield True