"""
Copyright 2020 The Magma Authors.

This source code is licensed under the BSD-style license found in the
LICENSE file in the root directory of this source tree.

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 threading import Thread
from typing import List
from unittest import mock

from lte.protos.mconfig import mconfigs_pb2
from configuration.service_configs import load_service_config
from common.sentry import sentry_init
from common.service import MagmaService
from enodeb_status import (
    get_operational_states,
    get_service_status_old,
)
from logger import EnodebdLogger as logger
from state_machines.enb_acs_manager import StateMachineManager
from orc8r.protos.service303_pb2 import State

from enodebd_iptables_rules import set_enodebd_iptables_rule
from rpc_servicer import EnodebdRpcServicer
from stats_manager import StatsManager
from tr069.server import tr069_server
from prometheus_client import start_http_server as prometheus_start_http_server


def get_context(ip: str):
    with mock.patch('spyne.server.wsgi.WsgiApplication') as MockTransport:
        MockTransport.req_env = {"REMOTE_ADDR": ip}
        with mock.patch('spyne.server.wsgi.WsgiMethodContext') as MockContext:
            MockContext.transport = MockTransport
            return MockContext


def main():
    """
    Top-level function for enodebd
    """
    service = MagmaService('enodebd', mconfigs_pb2.EnodebD())
    logger.init()

    enodebd_cfg = load_service_config('enodebd')
    prometheus_cfg = enodebd_cfg.get("prometheus", None)

    if not prometheus_cfg:
        logger.warning("Prometheus configuration wasn't found in enodebd configuration.")
    else:
        prometheus_ip = prometheus_cfg.get("ip")
        prometheus_port = prometheus_cfg.get("port")
        prometheus_start_http_server(prometheus_port, addr=prometheus_ip)
        logger.info(
            "Starting Prometheus server on address %s:%d",
            prometheus_ip, prometheus_port)

    # Optionally pipe errors to Sentry
    sentry_init(service_name=service.name)

    # State machine manager for tracking multiple connected eNB devices.
    state_machine_manager = StateMachineManager(service)

    # Statistics manager
    stats_mgr = StatsManager(state_machine_manager)
    stats_mgr.run()

    # Start TR-069 thread
    server_thread = Thread(
        target=tr069_server,
        args=(state_machine_manager,),
        daemon=True,
    )
    server_thread.start()

    # Add all servicers to the server
    enodebd_servicer = EnodebdRpcServicer(state_machine_manager)
    enodebd_servicer.add_to_server(service.rpc_server)

    # Register function to get service status
    def get_enodebd_status():
        return get_service_status_old(state_machine_manager)
    service.register_get_status_callback(get_enodebd_status)

    # Register a callback function for GetOperationalStates service303 function
    def get_enodeb_operational_states() -> List[State]:
        return get_operational_states(state_machine_manager, service.mconfig)
    service.register_operational_states_callback(get_enodeb_operational_states)

    # Set eNodeBD iptables rules due to exposing public IP to eNodeB
    service.loop.create_task(set_enodebd_iptables_rule())

    # Run the service loop
    service.run()

    # Cleanup the service
    service.close()


def call_repeatedly(loop, interval, function, *args, **kwargs):
    """
    Wrapper function to schedule function periodically
    """
    # Schedule next call
    loop.call_later(
        interval, call_repeatedly, loop, interval, function,
        *args, **kwargs,
    )
    # Call function
    function(*args, **kwargs)


if __name__ == "__main__":
    main()