# Copyright 2017-present Open Networking Foundation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

from __future__ import absolute_import

import os

from twisted.internet import defer
from xosconfig import Config
from multistructlog import create_logger

current_dir = os.path.dirname(os.path.realpath(__file__))
config_file = os.path.join(current_dir, "xos-tosca.config.yaml")
config_schema = os.path.join(current_dir, "xos-tosca-config-schema.yaml")

Config.init(config_file, config_schema)
log = create_logger(Config().get("logging"))

# config needs to be init before these imports, thus E402
from grpc_client import GRPC_Client  # noqa: E402
from tosca import TOSCA_Generator  # noqa: E402
from web_server import TOSCA_WebServer  # noqa: E402


class Main:
    def __init__(self):
        self.grpc_client = None

    def generate_tosca(self, client):

        deferred = defer.Deferred()

        TOSCA_Generator().generate(client)

        return deferred

    def start(self):
        log.info("[XOS-TOSCA] Starting")

        # Remove generated TOSCA and KEYS that may have been downloaded by a
        # previous session. This is done here, rather than in the generator, to
        # cover the case where the TOSCA engine is restarted and a web request
        # is received and processed before generate_tosca() has completed.

        TOSCA_Generator().clean()
        TOSCA_Generator().clean_keys()

        grpc_setup = GRPC_Client().start()
        grpc_setup.addCallback(self.generate_tosca)

        # NOTE that TOSCA_WebServer create a Klein app that call reactor.run()
        TOSCA_WebServer()


if __name__ == "__main__":
    Main().start()