"""
Service for integrating the Evennia Game Index client into Evennia.

"""
from twisted.internet import reactor
from twisted.internet.task import LoopingCall
from twisted.application.service import Service

from evennia.utils import logger
from .client import EvenniaGameIndexClient

# How many seconds to wait before triggering the first EGI check-in.
_FIRST_UPDATE_DELAY = 10
# How often to sync to the server
_CLIENT_UPDATE_RATE = 60 * 30


class EvenniaGameIndexService(Service):
    """
    Twisted Service that contains a LoopingCall for regularly sending game details
    to the Evennia Game Index.

    """
    # We didn't stick the Evennia prefix on here because it'd get marked as
    # a core system service.
    name = 'GameIndexClient'

    def __init__(self):
        self.client = EvenniaGameIndexClient(
            on_bad_request=self._die_on_bad_request)
        self.loop = LoopingCall(self.client.send_game_details)

    def startService(self):
        super().startService()
        # Check to make sure that the client is configured.
        # Start the loop, but only after a short delay. This allows the
        # portal and the server time to sync up as far as total player counts.
        # Prevents always reporting a count of 0.
        reactor.callLater(
            _FIRST_UPDATE_DELAY, self.loop.start, _CLIENT_UPDATE_RATE)

    def stopService(self):
        if self.running == 0:
            # reload errors if we've stopped this service.
            return
        super().stopService()
        if self.loop.running:
            self.loop.stop()

    def _die_on_bad_request(self):
        """
        If it becomes apparent that our configuration is generating improperly
        formed messages to EGI, we don't want to keep sending bad messages.
        Stop the service so we're not wasting resources.
        """
        logger.log_infomsg(
            "Shutting down Evennia Game Index client service due to "
            "invalid configuration.")
        self.stopService()
