"""Bootstrap Hass.io."""
import logging
import os
from pathlib import Path
import shutil
import signal

from colorlog import ColoredFormatter

from .addons import AddonManager
from .api import RestAPI
from .arch import CpuArch
from .auth import Auth
from .const import SOCKET_DOCKER
from .core import HassIO
from .coresys import CoreSys
from .dbus import DBusManager
from .discovery import Discovery
from .hassos import HassOS
from .homeassistant import HomeAssistant
from .host import HostManager
from .services import ServiceManager
from .snapshots import SnapshotManager
from .supervisor import Supervisor
from .tasks import Tasks
from .updater import Updater

_LOGGER = logging.getLogger(__name__)

ENV_SHARE = "SUPERVISOR_SHARE"
ENV_NAME = "SUPERVISOR_NAME"
ENV_REPO = "HOMEASSISTANT_REPOSITORY"

MACHINE_ID = Path("/etc/machine-id")


async def initialize_coresys():
    """Initialize HassIO coresys/objects."""
    coresys = CoreSys()

    # Initialize core objects
    coresys.core = HassIO(coresys)
    coresys.arch = CpuArch(coresys)
    coresys.auth = Auth(coresys)
    coresys.updater = Updater(coresys)
    coresys.api = RestAPI(coresys)
    coresys.supervisor = Supervisor(coresys)
    coresys.homeassistant = HomeAssistant(coresys)
    coresys.addons = AddonManager(coresys)
    coresys.snapshots = SnapshotManager(coresys)
    coresys.host = HostManager(coresys)
    coresys.tasks = Tasks(coresys)
    coresys.services = ServiceManager(coresys)
    coresys.discovery = Discovery(coresys)
    coresys.dbus = DBusManager(coresys)
    coresys.hassos = HassOS(coresys)

    # bootstrap config
    initialize_system_data(coresys)

    # Set Machine/Host ID
    if MACHINE_ID.exists():
        coresys.machine_id = MACHINE_ID.read_text().strip()

    return coresys


def initialize_system_data(coresys):
    """Set up the default configuration and create folders."""
    config = coresys.config

    # Home Assistant configuration folder
    if not config.path_homeassistant.is_dir():
        _LOGGER.info("Create Home Assistant configuration folder %s",
                     config.path_homeassistant)
        config.path_homeassistant.mkdir()

    # hassio ssl folder
    if not config.path_ssl.is_dir():
        _LOGGER.info("Create Hass.io SSL/TLS folder %s", config.path_ssl)
        config.path_ssl.mkdir()

    # hassio addon data folder
    if not config.path_addons_data.is_dir():
        _LOGGER.info("Create Hass.io Add-on data folder %s",
                     config.path_addons_data)
        config.path_addons_data.mkdir(parents=True)

    if not config.path_addons_local.is_dir():
        _LOGGER.info("Create Hass.io Add-on local repository folder %s",
                     config.path_addons_local)
        config.path_addons_local.mkdir(parents=True)

    if not config.path_addons_git.is_dir():
        _LOGGER.info("Create Hass.io Add-on git repositories folder %s",
                     config.path_addons_git)
        config.path_addons_git.mkdir(parents=True)

    # hassio tmp folder
    if not config.path_tmp.is_dir():
        _LOGGER.info("Create Hass.io temp folder %s", config.path_tmp)
        config.path_tmp.mkdir(parents=True)

    # hassio backup folder
    if not config.path_backup.is_dir():
        _LOGGER.info("Create Hass.io backup folder %s", config.path_backup)
        config.path_backup.mkdir()

    # share folder
    if not config.path_share.is_dir():
        _LOGGER.info("Create Hass.io share folder %s", config.path_share)
        config.path_share.mkdir()

    # apparmor folder
    if not config.path_apparmor.is_dir():
        _LOGGER.info("Create Hass.io Apparmor folder %s", config.path_apparmor)
        config.path_apparmor.mkdir()

    return config


def migrate_system_env(coresys):
    """Cleanup some stuff after update."""
    config = coresys.config

    # hass.io 0.37 -> 0.38
    old_build = Path(config.path_hassio, "addons/build")
    if old_build.is_dir():
        try:
            old_build.rmdir()
        except OSError:
            _LOGGER.warning("Can't cleanup old Add-on build directory")


def initialize_logging():
    """Setup the logging."""
    logging.basicConfig(level=logging.INFO)
    fmt = "%(asctime)s %(levelname)s (%(threadName)s) [%(name)s] %(message)s"
    colorfmt = f"%(log_color)s{fmt}%(reset)s"
    datefmt = "%y-%m-%d %H:%M:%S"

    # suppress overly verbose logs from libraries that aren't helpful
    logging.getLogger("aiohttp.access").setLevel(logging.WARNING)

    logging.getLogger().handlers[0].setFormatter(
        ColoredFormatter(
            colorfmt,
            datefmt=datefmt,
            reset=True,
            log_colors={
                "DEBUG": "cyan",
                "INFO": "green",
                "WARNING": "yellow",
                "ERROR": "red",
                "CRITICAL": "red",
            },
        ))


def check_environment():
    """Check if all environment are exists."""
    # check environment variables
    for key in (ENV_SHARE, ENV_NAME, ENV_REPO):
        try:
            os.environ[key]
        except KeyError:
            _LOGGER.fatal("Can't find %s in env!", key)
            return False

    # check docker socket
    if not SOCKET_DOCKER.is_socket():
        _LOGGER.fatal("Can't find Docker socket!")
        return False

    # check socat exec
    if not shutil.which("socat"):
        _LOGGER.fatal("Can't find socat!")
        return False

    # check socat exec
    if not shutil.which("gdbus"):
        _LOGGER.fatal("Can't find gdbus!")
        return False

    return True


def reg_signal(loop):
    """Register SIGTERM and SIGKILL to stop system."""
    try:
        loop.add_signal_handler(signal.SIGTERM,
                                lambda: loop.call_soon(loop.stop))
    except (ValueError, RuntimeError):
        _LOGGER.warning("Could not bind to SIGTERM")

    try:
        loop.add_signal_handler(signal.SIGHUP,
                                lambda: loop.call_soon(loop.stop))
    except (ValueError, RuntimeError):
        _LOGGER.warning("Could not bind to SIGHUP")

    try:
        loop.add_signal_handler(signal.SIGINT,
                                lambda: loop.call_soon(loop.stop))
    except (ValueError, RuntimeError):
        _LOGGER.warning("Could not bind to SIGINT")