# -*- coding: utf-8 -*-
# entrypoints.py
# Copyright (C) 2016 LEAP
#
# 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/>.
"""
Entrypoints for the Soledad server.
"""
import os

from twisted.internet import reactor
from twisted.python import threadpool
from twisted.logger import Logger

from ..common.couch.state import check_schema_versions
from .auth import localPortal, publicPortal
from .session import SoledadSession
from ._config import get_config
from ._wsgi import init_couch_state


conf = get_config()
log = Logger()


class UsersEntrypoint(SoledadSession):

    def __init__(self):
        pool = threadpool.ThreadPool(name='wsgi')
        reactor.callWhenRunning(pool.start)
        reactor.addSystemEventTrigger('after', 'shutdown', pool.stop)
        portal = publicPortal(sync_pool=pool)
        SoledadSession.__init__(self, portal)


class ServicesEntrypoint(SoledadSession):

    def __init__(self):
        portal = localPortal()
        SoledadSession.__init__(self, portal)


def check_conf():
    path = conf['blobs_path']
    blobs_not_empty = bool(os.path.exists(path) and os.listdir(path))
    if not conf['blobs'] and blobs_not_empty:
        message = """
**  WARNING: Blobs is disabled, but blobs directory isn't empty.          **
**  If it was previously enabled, disabling can cause data loss due blobs **
**  documents not being accessible to users.                              **
**  Blobs directory: %s
**  REFUSING TO START. Please double check your configuration.            **
    """
        log.error(message % path)
        reactor.stop()


reactor.callWhenRunning(check_conf)
reactor.callWhenRunning(check_schema_versions, conf['couch_url'])
# see the comments in _wsgi.py regarding why couch state has to be
# initialized when the reactor is running
reactor.callWhenRunning(init_couch_state, conf)