"""Support for viewing the camera feed from a DoorBird video doorbell."""
from __future__ import annotations

import asyncio
import datetime
import logging

import aiohttp

from homeassistant.components.camera import Camera, CameraEntityFeature
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.aiohttp_client import async_get_clientsession
from homeassistant.helpers.entity_platform import AddEntitiesCallback
import homeassistant.util.dt as dt_util

from .const import DOMAIN
from .entity import DoorBirdEntity
from .models import DoorBirdData

_LAST_VISITOR_INTERVAL = datetime.timedelta(minutes=2)
_LAST_MOTION_INTERVAL = datetime.timedelta(seconds=30)
_LIVE_INTERVAL = datetime.timedelta(seconds=45)
_LOGGER = logging.getLogger(__name__)
_TIMEOUT = 15  # seconds


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up the DoorBird camera platform."""
    config_entry_id = config_entry.entry_id
    door_bird_data: DoorBirdData = hass.data[DOMAIN][config_entry_id]
    device = door_bird_data.door_station.device

    async_add_entities(
        [
            DoorBirdCamera(
                door_bird_data,
                device.live_image_url,
                "live",
                "live",
                _LIVE_INTERVAL,
                device.rtsp_live_video_url,
            ),
            DoorBirdCamera(
                door_bird_data,
                device.history_image_url(1, "doorbell"),
                "last_ring",
                "last_ring",
                _LAST_VISITOR_INTERVAL,
            ),
            DoorBirdCamera(
                door_bird_data,
                device.history_image_url(1, "motionsensor"),
                "last_motion",
                "last_motion",
                _LAST_MOTION_INTERVAL,
            ),
        ]
    )


class DoorBirdCamera(DoorBirdEntity, Camera):
    """The camera on a DoorBird device."""

    def __init__(
        self,
        door_bird_data: DoorBirdData,
        url: str,
        camera_id: str,
        translation_key: str,
        interval: datetime.timedelta,
        stream_url: str | None = None,
    ) -> None:
        """Initialize the camera on a DoorBird device."""
        super().__init__(door_bird_data)
        self._url = url
        self._stream_url = stream_url
        self._attr_translation_key = translation_key
        self._last_image: bytes | None = None
        if self._stream_url:
            self._attr_supported_features = CameraEntityFeature.STREAM
        self._interval = interval
        self._last_update = datetime.datetime.min
        self._attr_unique_id = f"{self._mac_addr}_{camera_id}"

    async def stream_source(self) -> str | None:
        """Return the stream source."""
        return self._stream_url

    async def async_camera_image(
        self, width: int | None = None, height: int | None = None
    ) -> bytes | None:
        """Pull a still image from the camera."""
        now = dt_util.utcnow()

        if self._last_image and now - self._last_update < self._interval:
            return self._last_image

        try:
            websession = async_get_clientsession(self.hass)
            async with asyncio.timeout(_TIMEOUT):
                response = await websession.get(self._url)

            self._last_image = await response.read()
            self._last_update = now
            return self._last_image
        except asyncio.TimeoutError:
            _LOGGER.error("DoorBird %s: Camera image timed out", self.name)
            return self._last_image
        except aiohttp.ClientError as error:
            _LOGGER.error(
                "DoorBird %s: Error getting camera image: %s", self.name, error
            )
            return self._last_image

    async def async_added_to_hass(self) -> None:
        """Subscribe to events."""
        await super().async_added_to_hass()
        event_to_entity_id = self._door_bird_data.event_entity_ids
        for event in self._door_station.events:
            event_to_entity_id[event] = self.entity_id

    async def async_will_remove_from_hass(self) -> None:
        """Unsubscribe from events."""
        event_to_entity_id = self._door_bird_data.event_entity_ids
        for event in self._door_station.events:
            # If the clear api was called, the events may not be in the dict
            event_to_entity_id.pop(event, None)
        await super().async_will_remove_from_hass()