#!/usr/bin/env python3

# Libervia: an XMPP client
# Copyright (C) 2009-2026 Jérôme Poisson (goffi@goffi.org)

# 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/>.


from twisted.internet.error import ReactorAlreadyInstalledError
from zope.interface import implementer
from twisted.python import usage
from twisted.plugin import IPlugin
from twisted.application.service import IServiceMaker

# XXX: We need to configure logs before any log method is used, so here is the best place.
from libervia.backend.core import exceptions
from libervia.backend.core.constants import Const as C
from libervia.backend.core.i18n import _


def initialise(options):
    """Method to initialise global modules"""
    # XXX: We need to configure logs before any log method is used, so here is the best
    # place.
    from libervia.backend.core import log_config

    log_config.libervia_configure(C.LOG_BACKEND_TWISTED, C, backend_data=options)


class Options(usage.Options):
    optParameters = []


@implementer(IPlugin, IServiceMaker)
class LiberviaMaker:

    tapname = C.APP_NAME_FILE
    description = _("%s XMPP client backend") % C.APP_NAME_FULL
    options = Options

    def set_debugger(self):
        from twisted.internet import defer

        if defer.Deferred.debug:
            # if we are in debug mode, we want to use ipdb instead of pdb
            try:
                import ipdb
                import pdb

                pdb.set_trace = ipdb.set_trace
                pdb.post_mortem = ipdb.post_mortem
            except ImportError:
                pass

    def makeService(self, options):
        from twisted.internet import asyncioreactor

        try:
            asyncioreactor.install()
        except ReactorAlreadyInstalledError as e:
            from twisted.internet import reactor

            if not isinstance(reactor, asyncioreactor.AsyncioSelectorReactor):
                raise exceptions.InternalError(
                    f"Wrong reactor installed: {reactor}"
                ) from e
        self.set_debugger()
        # XXX: Libervia must be imported after log configuration,
        #      because it write stuff to logs
        initialise(options.parent)
        from libervia.backend.core.main import LiberviaBackend

        return LiberviaBackend()


serviceMaker = LiberviaMaker()
