"""Main file for HassIO."""
import asyncio
import logging

import aiohttp

from .addons import AddonManager
from .api import RestAPI
from .host_control import HostControl
from .const import (
    RUN_UPDATE_INFO_TASKS, RUN_RELOAD_ADDONS_TASKS,
    RUN_UPDATE_SUPERVISOR_TASKS, RUN_WATCHDOG_HOMEASSISTANT,
    RUN_CLEANUP_API_SESSIONS, STARTUP_SYSTEM, STARTUP_SERVICES,
    STARTUP_APPLICATION, STARTUP_INITIALIZE, RUN_RELOAD_SNAPSHOTS_TASKS,
    RUN_UPDATE_ADDONS_TASKS)
from .hardware import Hardware
from .homeassistant import HomeAssistant
from .scheduler import Scheduler
from .dock import DockerAPI
from .dock.supervisor import DockerSupervisor
from .dns import DNSForward
from .snapshots import SnapshotsManager
from .updater import Updater
from .tasks import (
    hassio_update, homeassistant_watchdog, api_sessions_cleanup, addons_update)
from .tools import fetch_timezone

_LOGGER = logging.getLogger(__name__)


class HassIO(object):
    """Main object of hassio."""

    def __init__(self, loop, config):
        """Initialize hassio object."""
        self.exit_code = 0
        self.loop = loop
        self.config = config
        self.websession = aiohttp.ClientSession(loop=loop)
        self.updater = Updater(config, loop, self.websession)
        self.scheduler = Scheduler(loop)
        self.api = RestAPI(config, loop)
        self.hardware = Hardware()
        self.docker = DockerAPI()
        self.dns = DNSForward()

        # init basic docker container
        self.supervisor = DockerSupervisor(
            config, loop, self.docker, self.stop)

        # init homeassistant
        self.homeassistant = HomeAssistant(
            config, loop, self.docker, self.updater)

        # init HostControl
        self.host_control = HostControl(loop)

        # init addon system
        self.addons = AddonManager(config, loop, self.docker)

        # init snapshot system
        self.snapshots = SnapshotsManager(
            config, loop, self.scheduler, self.addons, self.homeassistant)

    async def setup(self):
        """Setup HassIO orchestration."""
        # supervisor
        if not await self.supervisor.attach():
            _LOGGER.fatal("Can't setup supervisor docker container!")
        await self.supervisor.cleanup()

        # set running arch
        self.config.arch = self.supervisor.arch

        # update timezone
        if self.config.timezone == 'UTC':
            self.config.timezone = await fetch_timezone(self.websession)

        # hostcontrol
        await self.host_control.load()

        # schedule update info tasks
        self.scheduler.register_task(
            self.host_control.load, RUN_UPDATE_INFO_TASKS)

        # rest api views
        self.api.register_host(self.host_control, self.hardware)
        self.api.register_network(self.host_control)
        self.api.register_supervisor(
            self.supervisor, self.snapshots, self.addons, self.host_control,
            self.updater)
        self.api.register_homeassistant(self.homeassistant)
        self.api.register_addons(self.addons)
        self.api.register_security()
        self.api.register_snapshots(self.snapshots)
        self.api.register_panel()

        # schedule api session cleanup
        self.scheduler.register_task(
            api_sessions_cleanup(self.config), RUN_CLEANUP_API_SESSIONS,
            now=True)

        # Load homeassistant
        await self.homeassistant.prepare()

        # Load addons
        await self.addons.prepare()

        # schedule addon update task
        self.scheduler.register_task(
            self.addons.reload, RUN_RELOAD_ADDONS_TASKS, now=True)
        self.scheduler.register_task(
            addons_update(self.loop, self.addons), RUN_UPDATE_ADDONS_TASKS)

        # schedule self update task
        self.scheduler.register_task(
            hassio_update(self.supervisor, self.updater),
            RUN_UPDATE_SUPERVISOR_TASKS)

        # schedule snapshot update tasks
        self.scheduler.register_task(
            self.snapshots.reload, RUN_RELOAD_SNAPSHOTS_TASKS, now=True)

        # start dns forwarding
        self.loop.create_task(self.dns.start())

        # start addon mark as initialize
        await self.addons.auto_boot(STARTUP_INITIALIZE)

    async def start(self):
        """Start HassIO orchestration."""
        # on release channel, try update itself
        # on beta channel, only read new versions
        await asyncio.wait(
            [hassio_update(self.supervisor, self.updater)()],
            loop=self.loop
        )

        # start api
        await self.api.start()
        _LOGGER.info("Start hassio api on %s", self.docker.network.supervisor)

        try:
            # HomeAssistant is already running / supervisor have only reboot
            if self.hardware.last_boot == self.config.last_boot:
                _LOGGER.info("HassIO reboot detected")
                return

            # start addon mark as system
            await self.addons.auto_boot(STARTUP_SYSTEM)

            # start addon mark as services
            await self.addons.auto_boot(STARTUP_SERVICES)

            # run HomeAssistant
            if self.homeassistant.boot:
                await self.homeassistant.run()

            # start addon mark as application
            await self.addons.auto_boot(STARTUP_APPLICATION)

            # store new last boot
            self.config.last_boot = self.hardware.last_boot

        finally:
            # schedule homeassistant watchdog
            self.scheduler.register_task(
                homeassistant_watchdog(self.loop, self.homeassistant),
                RUN_WATCHDOG_HOMEASSISTANT)

            # If landingpage / run upgrade in background
            if self.homeassistant.version == 'landingpage':
                self.loop.create_task(self.homeassistant.install())

    async def stop(self, exit_code=0):
        """Stop a running orchestration."""
        # don't process scheduler anymore
        self.scheduler.suspend = True

        # process stop tasks
        self.websession.close()
        await asyncio.wait([self.api.stop(), self.dns.stop()], loop=self.loop)

        self.exit_code = exit_code
        self.loop.stop()