"""Init file for Hass.io Docker object."""
from contextlib import suppress
from ipaddress import IPv4Address
import logging
from typing import Awaitable, Optional

import docker

from ..const import ENV_TIME, ENV_TOKEN, LABEL_MACHINE
from ..exceptions import DockerAPIError
from .interface import CommandReturn, DockerInterface

_LOGGER = logging.getLogger(__name__)

HASS_DOCKER_NAME = "homeassistant"


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

    @property
    def machine(self) -> Optional[str]:
        """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) -> str:
        """Return name of Docker image."""
        return self.sys_homeassistant.image

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

    @property
    def timeout(self) -> int:
        """Return timeout for Docker actions."""
        return 60

    @property
    def ip_address(self) -> IPv4Address:
        """Return IP address of this container."""
        return self.sys_docker.network.gateway

    def _run(self) -> None:
        """Run Docker image.

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

        # Cleanup
        with suppress(DockerAPIError):
            self._stop()

        # Create & Run container
        docker_container = self.sys_docker.run(
            self.image,
            version=self.sys_homeassistant.version,
            name=self.name,
            hostname=self.name,
            detach=True,
            privileged=True,
            init=True,
            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",
                },
            },
        )

        self._meta = docker_container.attrs
        _LOGGER.info("Start homeassistant %s with version %s", self.image, self.version)

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

        Need run inside executor.
        """
        return self.sys_docker.run_command(
            self.image,
            version=self.sys_homeassistant.version,
            command=command,
            privileged=True,
            init=True,
            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) -> Awaitable[bool]:
        """Return True if Docker container exists."""
        return self.sys_run_in_executor(self._is_initialize)

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

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

        # we run on an old image, stop and start it
        if docker_container.image.id != docker_image.id:
            return False

        return True