# copyright 2014 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact https://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb.  If not, see <https://www.gnu.org/licenses/>.

from cubicweb.server import hook


class ZMQStopHook(hook.Hook):
    __regid__ = "zmqstop"
    events = ("server_shutdown",)

    def __call__(self):
        self.repo.app_instances_bus.stop()


class ZMQStartHook(hook.Hook):
    __regid__ = "zmqstart"
    events = ("server_startup",)
    order = -1

    def __call__(self):
        config = self.repo.config
        address_pub = config.get("zmq-address-pub")
        address_sub = config.get("zmq-address-sub")
        if not address_pub and not address_sub:
            return
        from cubicweb.server import cwzmq

        self.repo.app_instances_bus = cwzmq.ZMQComm()
        if address_pub:
            self.repo.app_instances_bus.add_publisher(address_pub)

        def clear_cache_callback(msg):
            self.debug("clear_caches: %s", " ".join(msg))
            self.repo.clear_caches(msg[1:])

        self.repo.app_instances_bus.add_subscription("delete", clear_cache_callback)
        for address in address_sub:
            self.repo.app_instances_bus.add_subscriber(address)
        self.repo.app_instances_bus.start()
