"""Init file for Hass.io Docker object."""
import logging

import docker

from .interface import DockerInterface
from ..const import ENV_TOKEN, ENV_TIME, LABEL_MACHINE

_LOGGER = logging.getLogger(__name__)

HASS_DOCKER_NAME = 'homeassistant'


class DockerHomeAssistant(DockerInterface):
    """Docker Hass.io wrapper for Home Assistant."""

    @property
    def machine(self):
        """Return machine of Home Assistant Docker image."""
        if self._meta and LABEL_MACHINE in self._meta['Config']['Labels']:
            return self._meta['Config']['Labels'][LABEL_MACHINE]
        return None

    @property
    def image(self):
        """Return name of Docker image."""
        return self.sys_homeassistant.image

    @property
    def name(self):
        """Return name of Docker container."""
        return HASS_DOCKER_NAME

    @property
    def devices(self):
        """Create list of special device to map into Docker."""
        devices = []
        for device in self.sys_hardware.serial_devices:
            devices.append(f"{device}:{device}:rwm")
        return devices or None

    def _run(self):
        """Run Docker image.

        Need run inside executor.
        """
        if self._is_running():
            return False

        # cleanup
        self._stop()

        ret = self.sys_docker.run(
            self.image,
            name=self.name,
            hostname=self.name,
            detach=True,
            privileged=True,
            init=True,
            devices=self.devices,
            network_mode='host',
            environment={
                'HASSIO': self.sys_docker.network.supervisor,
                ENV_TIME: self.sys_timezone,
                ENV_TOKEN: self.sys_homeassistant.hassio_token,
            },
            volumes={
                str(self.sys_config.path_extern_homeassistant):
                    {'bind': '/config', 'mode': 'rw'},
                str(self.sys_config.path_extern_ssl):
                    {'bind': '/ssl', 'mode': 'ro'},
                str(self.sys_config.path_extern_share):
                    {'bind': '/share', 'mode': 'rw'},
            }
        )

        if ret:
            _LOGGER.info("Start homeassistant %s with version %s",
                         self.image, self.version)

        return ret

    def _execute_command(self, command):
        """Create a temporary container and run command.

        Need run inside executor.
        """
        return self.sys_docker.run_command(
            self.image,
            command,
            privileged=True,
            init=True,
            devices=self.devices,
            detach=True,
            stdout=True,
            stderr=True,
            environment={
                ENV_TIME: self.sys_timezone,
            },
            volumes={
                str(self.sys_config.path_extern_homeassistant):
                    {'bind': '/config', 'mode': 'rw'},
                str(self.sys_config.path_extern_ssl):
                    {'bind': '/ssl', 'mode': 'ro'},
                str(self.sys_config.path_extern_share):
                    {'bind': '/share', 'mode': 'ro'},
            }
        )

    def is_initialize(self):
        """Return True if Docker container exists."""
        return self.sys_run_in_executor(self._is_initialize)

    def _is_initialize(self):
        """Return True if docker container exists.

        Need run inside executor.
        """
        try:
            self.sys_docker.containers.get(self.name)
        except docker.errors.DockerException:
            return False

        return True