text: """Component to interface with cameras."""
  from __future__ import annotations
  
  import asyncio
  import base64
  import collections
  from collections.abc import Awaitable, Callable, Iterable
  from contextlib import suppress
  from dataclasses import dataclass
  from datetime import datetime, timedelta
  from enum import IntEnum
  from functools import partial
  import logging
  import os
  from random import SystemRandom
  from typing import Final, Optional, cast, final
  
  from aiohttp import web
  import async_timeout
  import attr
  import voluptuous as vol
  
  from homeassistant.components import websocket_api
  from homeassistant.components.http import KEY_AUTHENTICATED, HomeAssistantView
  from homeassistant.components.media_player.const import (
      ATTR_MEDIA_CONTENT_ID,
      ATTR_MEDIA_CONTENT_TYPE,
      DOMAIN as DOMAIN_MP,
      SERVICE_PLAY_MEDIA,
  )
  from homeassistant.components.stream import (
      FORMAT_CONTENT_TYPE,
      OUTPUT_FORMATS,
      Stream,
      create_stream,
  )
  from homeassistant.components.websocket_api import ActiveConnection
  from homeassistant.config_entries import ConfigEntry
  from homeassistant.const import (
      ATTR_ENTITY_ID,
      CONF_FILENAME,
      CONTENT_TYPE_MULTIPART,
      EVENT_HOMEASSISTANT_START,
      SERVICE_TURN_OFF,
      SERVICE_TURN_ON,
  )
  from homeassistant.core import Event, HomeAssistant, ServiceCall, callback
  from homeassistant.exceptions import HomeAssistantError
  import homeassistant.helpers.config_validation as cv
  from homeassistant.helpers.config_validation import (  # noqa: F401
      PLATFORM_SCHEMA,
      PLATFORM_SCHEMA_BASE,
  )
  from homeassistant.helpers.entity import Entity, EntityDescription
  from homeassistant.helpers.entity_component import EntityComponent
  from homeassistant.helpers.event import async_track_time_interval
  from homeassistant.helpers.network import get_url
  from homeassistant.helpers.typing import ConfigType
  from homeassistant.loader import bind_hass
  
  from .const import (  # noqa: F401
      CAMERA_IMAGE_TIMEOUT,
      CAMERA_STREAM_SOURCE_TIMEOUT,
      CONF_DURATION,
      CONF_LOOKBACK,
      DATA_CAMERA_PREFS,
      DATA_RTSP_TO_WEB_RTC,
      DOMAIN,
      SERVICE_RECORD,
      STREAM_TYPE_HLS,
      STREAM_TYPE_WEB_RTC,
      StreamType,
  )
  from .img_util import scale_jpeg_camera_image
  from .prefs import CameraPreferences
  
  # mypy: allow-untyped-calls
  
  _LOGGER = logging.getLogger(__name__)
  
  SERVICE_ENABLE_MOTION: Final = "enable_motion_detection"
  SERVICE_DISABLE_MOTION: Final = "disable_motion_detection"
  SERVICE_SNAPSHOT: Final = "snapshot"
  SERVICE_PLAY_STREAM: Final = "play_stream"
  
  SCAN_INTERVAL: Final = timedelta(seconds=30)
  ENTITY_ID_FORMAT: Final = DOMAIN + ".{}"
  
  ATTR_FILENAME: Final = "filename"
  ATTR_MEDIA_PLAYER: Final = "media_player"
  ATTR_FORMAT: Final = "format"
  
  STATE_RECORDING: Final = "recording"
  STATE_STREAMING: Final = "streaming"
  STATE_IDLE: Final = "idle"
  
  
  class CameraEntityFeature(IntEnum):
      """Supported features of the camera entity."""
  
      ON_OFF = 1
      STREAM = 2
  
  
  # These SUPPORT_* constants are deprecated as of Home Assistant 2022.5.
  # Pleease use the CameraEntityFeature enum instead.
  SUPPORT_ON_OFF: Final = 1
  SUPPORT_STREAM: Final = 2
  
  RTSP_PREFIXES = {"rtsp://", "rtsps://", "rtmp://"}
  
  DEFAULT_CONTENT_TYPE: Final = "image/jpeg"
  ENTITY_IMAGE_URL: Final = "/api/camera_proxy/{0}?token={1}"
  
  TOKEN_CHANGE_INTERVAL: Final = timedelta(minutes=5)
  _RND: Final = SystemRandom()
  
  MIN_STREAM_INTERVAL: Final = 0.5  # seconds
  
  CAMERA_SERVICE_SNAPSHOT: Final = {vol.Required(ATTR_FILENAME): cv.template}
  
  CAMERA_SERVICE_PLAY_STREAM: Final = {
      vol.Required(ATTR_MEDIA_PLAYER): cv.entities_domain(DOMAIN_MP),
      vol.Optional(ATTR_FORMAT, default="hls"): vol.In(OUTPUT_FORMATS),
  }
  
  CAMERA_SERVICE_RECORD: Final = {
      vol.Required(CONF_FILENAME): cv.template,
      vol.Optional(CONF_DURATION, default=30): vol.Coerce(int),
      vol.Optional(CONF_LOOKBACK, default=0): vol.Coerce(int),
  }
  
  WS_TYPE_CAMERA_THUMBNAIL: Final = "camera_thumbnail"
  SCHEMA_WS_CAMERA_THUMBNAIL: Final = websocket_api.BASE_COMMAND_MESSAGE_SCHEMA.extend(
      {
          vol.Required("type"): WS_TYPE_CAMERA_THUMBNAIL,
          vol.Required("entity_id"): cv.entity_id,
      }
  )
  
  
  @dataclass
  class CameraEntityDescription(EntityDescription):
      """A class that describes camera entities."""
  
  
  @attr.s
  class Image:
      """Represent an image."""
  
      content_type: str = attr.ib()
      content: bytes = attr.ib()
  
  
  @bind_hass
  async def async_request_stream(hass: HomeAssistant, entity_id: str, fmt: str) -> str:
      """Request a stream for a camera entity."""
      camera = _get_camera_from_entity_id(hass, entity_id)
      return await _async_stream_endpoint_url(hass, camera, fmt)
  
  
  async def _async_get_image(
      camera: Camera,
      timeout: int = 10,
      width: int | None = None,
      height: int | None = None,
  ) -> Image:
      """Fetch a snapshot image from a camera.
  
      If width and height are passed, an attempt to scale
      the image will be made on a best effort basis.
      Not all cameras can scale images or return jpegs
      that we can scale, however the majority of cases
      are handled.
      """
      with suppress(asyncio.CancelledError, asyncio.TimeoutError):
          async with async_timeout.timeout(timeout):
              if image_bytes := await camera.async_camera_image(
                  width=width, height=height
              ):
                  content_type = camera.content_type
                  image = Image(content_type, image_bytes)
                  if (
                      width is not None
                      and height is not None
                      and ("jpeg" in content_type or "jpg" in content_type)
                  ):
                      assert width is not None
                      assert height is not None
                      return Image(
                          content_type, scale_jpeg_camera_image(image, width, height)
                      )
  
                  return image
  
      raise HomeAssistantError("Unable to get image")
  
  
  @bind_hass
  async def async_get_image(
      hass: HomeAssistant,
      entity_id: str,
      timeout: int = 10,
      width: int | None = None,
      height: int | None = None,
  ) -> Image:
      """Fetch an image from a camera entity.
  
      width and height will be passed to the underlying camera.
      """
      camera = _get_camera_from_entity_id(hass, entity_id)
      return await _async_get_image(camera, timeout, width, height)
  
  
  @bind_hass
  async def async_get_stream_source(hass: HomeAssistant, entity_id: str) -> str | None:
      """Fetch the stream source for a camera entity."""
      camera = _get_camera_from_entity_id(hass, entity_id)
      return await camera.stream_source()
  
  
  @bind_hass
  async def async_get_mjpeg_stream(
      hass: HomeAssistant, request: web.Request, entity_id: str
  ) -> web.StreamResponse | None:
      """Fetch an mjpeg stream from a camera entity."""
      camera = _get_camera_from_entity_id(hass, entity_id)
  
      try:
          stream = await camera.handle_async_mjpeg_stream(request)
      except ConnectionResetError:
          stream = None
          _LOGGER.debug("Error while writing MJPEG stream to transport")
      return stream
  
  
  async def async_get_still_stream(
      request: web.Request,
      image_cb: Callable[[], Awaitable[bytes | None]],
      content_type: str,
      interval: float,
  ) -> web.StreamResponse:
      """Generate an HTTP MJPEG stream from camera images.
  
      This method must be run in the event loop.
      """
      response = web.StreamResponse()
      response.content_type = CONTENT_TYPE_MULTIPART.format("--frameboundary")
      await response.prepare(request)
  
      async def write_to_mjpeg_stream(img_bytes: bytes) -> None:
          """Write image to stream."""
          await response.write(
              bytes(
                  "--frameboundary\r\n"
                  "Content-Type: {}\r\n"
                  "Content-Length: {}\r\n\r\n".format(content_type, len(img_bytes)),
                  "utf-8",
              )
              + img_bytes
              + b"\r\n"
          )
  
      last_image = None
  
      while True:
          img_bytes = await image_cb()
          if not img_bytes:
              break
  
          if img_bytes != last_image:
              await write_to_mjpeg_stream(img_bytes)
  
              # Chrome seems to always ignore first picture,
              # print it twice.
              if last_image is None:
                  await write_to_mjpeg_stream(img_bytes)
              last_image = img_bytes
  
          await asyncio.sleep(interval)
  
      return response
  
  
  def _get_camera_from_entity_id(hass: HomeAssistant, entity_id: str) -> Camera:
      """Get camera component from entity_id."""
      if (component := hass.data.get(DOMAIN)) is None:
          raise HomeAssistantError("Camera integration not set up")
  
      if (camera := component.get_entity(entity_id)) is None:
          raise HomeAssistantError("Camera not found")
  
      if not camera.is_on:
          raise HomeAssistantError("Camera is off")
  
      return cast(Camera, camera)
  
  
  # An RtspToWebRtcProvider accepts these inputs:
  #     stream_source: The RTSP url
  #     offer_sdp: The WebRTC SDP offer
  #     stream_id: A unique id for the stream, used to update an existing source
  # The output is the SDP answer, or None if the source or offer is not eligible.
  # The Callable may throw HomeAssistantError on failure.
  RtspToWebRtcProviderType = Callable[[str, str, str], Awaitable[Optional[str]]]
  
  
  def async_register_rtsp_to_web_rtc_provider(
      hass: HomeAssistant,
      domain: str,
      provider: RtspToWebRtcProviderType,
  ) -> Callable[[], None]:
      """Register an RTSP to WebRTC provider.
  
      The first provider to satisfy the offer will be used.
      """
      if DOMAIN not in hass.data:
          raise ValueError("Unexpected state, camera not loaded")
  
      def remove_provider() -> None:
          if domain in hass.data[DATA_RTSP_TO_WEB_RTC]:
              del hass.data[DATA_RTSP_TO_WEB_RTC]
          hass.async_create_task(_async_refresh_providers(hass))
  
      hass.data.setdefault(DATA_RTSP_TO_WEB_RTC, {})
      hass.data[DATA_RTSP_TO_WEB_RTC][domain] = provider
      hass.async_create_task(_async_refresh_providers(hass))
      return remove_provider
  
  
  async def _async_refresh_providers(hass: HomeAssistant) -> None:
      """Check all cameras for any state changes for registered providers."""
  
      component: EntityComponent = hass.data[DOMAIN]
      await asyncio.gather(
          *(
              cast(Camera, camera).async_refresh_providers()
              for camera in component.entities
          )
      )
  
  
  def _async_get_rtsp_to_web_rtc_providers(
      hass: HomeAssistant,
  ) -> Iterable[RtspToWebRtcProviderType]:
      """Return registered RTSP to WebRTC providers."""
      providers: dict[str, RtspToWebRtcProviderType] = hass.data.get(
          DATA_RTSP_TO_WEB_RTC, {}
      )
      return providers.values()
  
  
  async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
      """Set up the camera component."""
      component = hass.data[DOMAIN] = EntityComponent(
          _LOGGER, DOMAIN, hass, SCAN_INTERVAL
      )
  
      prefs = CameraPreferences(hass)
      await prefs.async_initialize()
      hass.data[DATA_CAMERA_PREFS] = prefs
  
      hass.http.register_view(CameraImageView(component))
      hass.http.register_view(CameraMjpegStream(component))
      websocket_api.async_register_command(
          hass,
          WS_TYPE_CAMERA_THUMBNAIL,
          websocket_camera_thumbnail,
          SCHEMA_WS_CAMERA_THUMBNAIL,
      )
      websocket_api.async_register_command(hass, ws_camera_stream)
      websocket_api.async_register_command(hass, ws_camera_web_rtc_offer)
      websocket_api.async_register_command(hass, websocket_get_prefs)
      websocket_api.async_register_command(hass, websocket_update_prefs)
  
      await component.async_setup(config)
  
      async def preload_stream(_event: Event) -> None:
          for camera in component.entities:
              camera = cast(Camera, camera)
              camera_prefs = prefs.get(camera.entity_id)
              if not camera_prefs.preload_stream:
                  continue
              stream = await camera.async_create_stream()
              if not stream:
                  continue
              stream.keepalive = True
              stream.add_provider("hls")
              await stream.start()
  
      hass.bus.async_listen_once(EVENT_HOMEASSISTANT_START, preload_stream)
  
      @callback
      def update_tokens(time: datetime) -> None:
          """Update tokens of the entities."""
          for entity in component.entities:
              entity = cast(Camera, entity)
              entity.async_update_token()
              entity.async_write_ha_state()
  
      async_track_time_interval(hass, update_tokens, TOKEN_CHANGE_INTERVAL)
  
      component.async_register_entity_service(
          SERVICE_ENABLE_MOTION, {}, "async_enable_motion_detection"
      )
      component.async_register_entity_service(
          SERVICE_DISABLE_MOTION, {}, "async_disable_motion_detection"
      )
      component.async_register_entity_service(SERVICE_TURN_OFF, {}, "async_turn_off")
      component.async_register_entity_service(SERVICE_TURN_ON, {}, "async_turn_on")
      component.async_register_entity_service(
          SERVICE_SNAPSHOT, CAMERA_SERVICE_SNAPSHOT, async_handle_snapshot_service
      )
      component.async_register_entity_service(
          SERVICE_PLAY_STREAM,
          CAMERA_SERVICE_PLAY_STREAM,
          async_handle_play_stream_service,
      )
      component.async_register_entity_service(
          SERVICE_RECORD, CAMERA_SERVICE_RECORD, async_handle_record_service
      )
  
      return True
  
  
  async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
      """Set up a config entry."""
      component: EntityComponent = hass.data[DOMAIN]
      return await component.async_setup_entry(entry)
  
  
  async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
      """Unload a config entry."""
      component: EntityComponent = hass.data[DOMAIN]
      return await component.async_unload_entry(entry)
  
  
  class Camera(Entity):
      """The base class for camera entities."""
  
      # Entity Properties
      _attr_brand: str | None = None
      _attr_frame_interval: float = MIN_STREAM_INTERVAL
      _attr_frontend_stream_type: StreamType | None
      _attr_is_on: bool = True
      _attr_is_recording: bool = False
      _attr_is_streaming: bool = False
      _attr_model: str | None = None
      _attr_motion_detection_enabled: bool = False
      _attr_should_poll: bool = False  # No need to poll cameras
      _attr_state: None = None  # State is determined by is_on
      _attr_supported_features: int = 0
  
      def __init__(self) -> None:
          """Initialize a camera."""
          self.stream: Stream | None = None
          self.stream_options: dict[str, str | bool] = {}
          self.content_type: str = DEFAULT_CONTENT_TYPE
          self.access_tokens: collections.deque = collections.deque([], 2)
          self._warned_old_signature = False
          self.async_update_token()
          self._create_stream_lock: asyncio.Lock | None = None
          self._rtsp_to_webrtc = False
  
      @property
      def entity_picture(self) -> str:
          """Return a link to the camera feed as entity picture."""
          if self._attr_entity_picture is not None:
              return self._attr_entity_picture
          return ENTITY_IMAGE_URL.format(self.entity_id, self.access_tokens[-1])
  
      @property
      def supported_features(self) -> int:
          """Flag supported features."""
          return self._attr_supported_features
  
      @property
      def is_recording(self) -> bool:
          """Return true if the device is recording."""
          return self._attr_is_recording
  
      @property
      def is_streaming(self) -> bool:
          """Return true if the device is streaming."""
          return self._attr_is_streaming
  
      @property
      def brand(self) -> str | None:
          """Return the camera brand."""
          return self._attr_brand
  
      @property
      def motion_detection_enabled(self) -> bool:
          """Return the camera motion detection status."""
          return self._attr_motion_detection_enabled
  
      @property
      def model(self) -> str | None:
          """Return the camera model."""
          return self._attr_model
  
      @property
      def frame_interval(self) -> float:
          """Return the interval between frames of the mjpeg stream."""
          return self._attr_frame_interval
  
      @property
      def frontend_stream_type(self) -> StreamType | None:
          """Return the type of stream supported by this camera.
  
          A camera may have a single stream type which is used to inform the
          frontend which camera attributes and player to use. The default type
          is to use HLS, and components can override to change the type.
          """
          if hasattr(self, "_attr_frontend_stream_type"):
              return self._attr_frontend_stream_type
          if not self.supported_features & CameraEntityFeature.STREAM:
              return None
          if self._rtsp_to_webrtc:
              return StreamType.WEB_RTC
          return StreamType.HLS
  
      @property
      def available(self) -> bool:
          """Return True if entity is available."""
          if self.stream and not self.stream.available:
              return self.stream.available
          return super().available
  
      async def async_create_stream(self) -> Stream | None:
          """Create a Stream for stream_source."""
          # There is at most one stream (a decode worker) per camera
          if not self._create_stream_lock:
              self._create_stream_lock = asyncio.Lock()
          async with self._create_stream_lock:
              if not self.stream:
                  async with async_timeout.timeout(CAMERA_STREAM_SOURCE_TIMEOUT):
                      source = await self.stream_source()
                  if not source:
                      return None
                  self.stream = create_stream(
                      self.hass,
                      source,
                      options=self.stream_options,
                      stream_label=self.entity_id,
                  )
                  self.stream.set_update_callback(self.async_write_ha_state)
              return self.stream
  
      async def stream_source(self) -> str | None:
          """Return the source of the stream.
  
          This is used by cameras with CameraEntityFeature.STREAM
          and StreamType.HLS.
          """
          return None
  
      async def async_handle_web_rtc_offer(self, offer_sdp: str) -> str | None:
          """Handle the WebRTC offer and return an answer.
  
          This is used by cameras with CameraEntityFeature.STREAM
          and StreamType.WEB_RTC.
  
          Integrations can override with a native WebRTC implementation.
          """
          stream_source = await self.stream_source()
          if not stream_source:
              return None
          for provider in _async_get_rtsp_to_web_rtc_providers(self.hass):
              answer_sdp = await provider(stream_source, offer_sdp, self.entity_id)
              if answer_sdp:
                  return answer_sdp
          raise HomeAssistantError("WebRTC offer was not accepted by any providers")
  
      def camera_image(
          self, width: int | None = None, height: int | None = None
      ) -> bytes | None:
          """Return bytes of camera image."""
          raise NotImplementedError()
  
      async def async_camera_image(
          self, width: int | None = None, height: int | None = None
      ) -> bytes | None:
          """Return bytes of camera image."""
          return await self.hass.async_add_executor_job(
              partial(self.camera_image, width=width, height=height)
          )
  
      async def handle_async_still_stream(
          self, request: web.Request, interval: float
      ) -> web.StreamResponse:
          """Generate an HTTP MJPEG stream from camera images."""
          return await async_get_still_stream(
              request, self.async_camera_image, self.content_type, interval
          )
  
      async def handle_async_mjpeg_stream(
          self, request: web.Request
      ) -> web.StreamResponse | None:
          """Serve an HTTP MJPEG stream from the camera.
  
          This method can be overridden by camera platforms to proxy
          a direct stream from the camera.
          """
          return await self.handle_async_still_stream(request, self.frame_interval)
  
      @property
      @final
      def state(self) -> str:
          """Return the camera state."""
          if self.is_recording:
              return STATE_RECORDING
          if self.is_streaming:
              return STATE_STREAMING
          return STATE_IDLE
  
      @property
      def is_on(self) -> bool:
          """Return true if on."""
          return self._attr_is_on
  
      def turn_off(self) -> None:
          """Turn off camera."""
          raise NotImplementedError()
  
      async def async_turn_off(self) -> None:
          """Turn off camera."""
          await self.hass.async_add_executor_job(self.turn_off)
  
      def turn_on(self) -> None:
          """Turn off camera."""
          raise NotImplementedError()
  
      async def async_turn_on(self) -> None:
          """Turn off camera."""
          await self.hass.async_add_executor_job(self.turn_on)
  
      def enable_motion_detection(self) -> None:
          """Enable motion detection in the camera."""
          raise NotImplementedError()
  
      async def async_enable_motion_detection(self) -> None:
          """Call the job and enable motion detection."""
          await self.hass.async_add_executor_job(self.enable_motion_detection)
  
      def disable_motion_detection(self) -> None:
          """Disable motion detection in camera."""
          raise NotImplementedError()
  
      async def async_disable_motion_detection(self) -> None:
          """Call the job and disable motion detection."""
          await self.hass.async_add_executor_job(self.disable_motion_detection)
  
      @final
      @property
      def state_attributes(self) -> dict[str, str | None]:
          """Return the camera state attributes."""
          attrs = {"access_token": self.access_tokens[-1]}
  
          if self.model:
              attrs["model_name"] = self.model
  
          if self.brand:
              attrs["brand"] = self.brand
  
          if self.motion_detection_enabled:
              attrs["motion_detection"] = self.motion_detection_enabled
  
          if self.frontend_stream_type:
              attrs["frontend_stream_type"] = self.frontend_stream_type
  
          return attrs
  
      @callback
      def async_update_token(self) -> None:
          """Update the used token."""
          self.access_tokens.append(hex(_RND.getrandbits(256))[2:])
  
      async def async_internal_added_to_hass(self) -> None:
          """Run when entity about to be added to hass."""
          await super().async_internal_added_to_hass()
          await self.async_refresh_providers()
  
      async def async_refresh_providers(self) -> None:
          """Determine if any of the registered providers are suitable for this entity.
  
          This affects state attributes, so it should be invoked any time the registered
          providers or inputs to the state attributes change.
  
          Returns True if any state was updated (and needs to be written)
          """
          old_state = self._rtsp_to_webrtc
          self._rtsp_to_webrtc = await self._async_use_rtsp_to_webrtc()
          if old_state != self._rtsp_to_webrtc:
              self.async_write_ha_state()
  
      async def _async_use_rtsp_to_webrtc(self) -> bool:
          """Determine if a WebRTC provider can be used for the camera."""
          if not self.supported_features & CameraEntityFeature.STREAM:
              return False
          if DATA_RTSP_TO_WEB_RTC not in self.hass.data:
              return False
          stream_source = await self.stream_source()
          return any(
              stream_source and stream_source.startswith(prefix)
              for prefix in RTSP_PREFIXES
          )
  
  
  class CameraView(HomeAssistantView):
      """Base CameraView."""
  
      requires_auth = False
  
      def __init__(self, component: EntityComponent) -> None:
          """Initialize a basic camera view."""
          self.component = component
  
      async def get(self, request: web.Request, entity_id: str) -> web.StreamResponse:
          """Start a GET request."""
          if (camera := self.component.get_entity(entity_id)) is None:
              raise web.HTTPNotFound()
  
          camera = cast(Camera, camera)
  
          authenticated = (
              request[KEY_AUTHENTICATED]
              or request.query.get("token") in camera.access_tokens
          )
  
          if not authenticated:
              raise web.HTTPUnauthorized()
  
          if not camera.is_on:
              _LOGGER.debug("Camera is off")
              raise web.HTTPServiceUnavailable()
  
          return await self.handle(request, camera)
  
      async def handle(self, request: web.Request, camera: Camera) -> web.StreamResponse:
          """Handle the camera request."""
          raise NotImplementedError()
  
  
  class CameraImageView(CameraView):
      """Camera view to serve an image."""
  
      url = "/api/camera_proxy/{entity_id}"
      name = "api:camera:image"
  
      async def handle(self, request: web.Request, camera: Camera) -> web.Response:
          """Serve camera image."""
          width = request.query.get("width")
          height = request.query.get("height")
          try:
              image = await _async_get_image(
                  camera,
                  CAMERA_IMAGE_TIMEOUT,
                  int(width) if width else None,
                  int(height) if height else None,
              )
          except (HomeAssistantError, ValueError) as ex:
              raise web.HTTPInternalServerError() from ex
          else:
              return web.Response(body=image.content, content_type=image.content_type)
  
  
  class CameraMjpegStream(CameraView):
      """Camera View to serve an MJPEG stream."""
  
      url = "/api/camera_proxy_stream/{entity_id}"
      name = "api:camera:stream"
  
      async def handle(self, request: web.Request, camera: Camera) -> web.StreamResponse:
          """Serve camera stream, possibly with interval."""
          if (interval_str := request.query.get("interval")) is None:
              try:
                  stream = await camera.handle_async_mjpeg_stream(request)
              except ConnectionResetError:
                  stream = None
                  _LOGGER.debug("Error while writing MJPEG stream to transport")
              if stream is None:
                  raise web.HTTPBadGateway()
              return stream
  
          try:
              # Compose camera stream from stills
              interval = float(interval_str)
              if interval < MIN_STREAM_INTERVAL:
                  raise ValueError(f"Stream interval must be be > {MIN_STREAM_INTERVAL}")
              return await camera.handle_async_still_stream(request, interval)
          except ValueError as err:
              raise web.HTTPBadRequest() from err
  
  
  @websocket_api.async_response
  async def websocket_camera_thumbnail(
      hass: HomeAssistant, connection: ActiveConnection, msg: dict
  ) -> None:
      """Handle get camera thumbnail websocket command.
  
      Async friendly.
      """
      _LOGGER.warning("The websocket command 'camera_thumbnail' has been deprecated")
      try:
          image = await async_get_image(hass, msg["entity_id"])
          await connection.send_big_result(
              msg["id"],
              {
                  "content_type": image.content_type,
                  "content": base64.b64encode(image.content).decode("utf-8"),
              },
          )
      except HomeAssistantError:
          connection.send_message(
              websocket_api.error_message(
                  msg["id"], "image_fetch_failed", "Unable to fetch image"
              )
          )
  
  
  @websocket_api.websocket_command(
      {
          vol.Required("type"): "camera/stream",
          vol.Required("entity_id"): cv.entity_id,
          vol.Optional("format", default="hls"): vol.In(OUTPUT_FORMATS),
      }
  )
  @websocket_api.async_response
  async def ws_camera_stream(
      hass: HomeAssistant, connection: ActiveConnection, msg: dict
  ) -> None:
      """Handle get camera stream websocket command.
  
      Async friendly.
      """
      try:
          entity_id = msg["entity_id"]
          camera = _get_camera_from_entity_id(hass, entity_id)
          url = await _async_stream_endpoint_url(hass, camera, fmt=msg["format"])
          connection.send_result(msg["id"], {"url": url})
      except HomeAssistantError as ex:
          _LOGGER.error("Error requesting stream: %s", ex)
          connection.send_error(msg["id"], "start_stream_failed", str(ex))
      except asyncio.TimeoutError:
          _LOGGER.error("Timeout getting stream source")
          connection.send_error(
              msg["id"], "start_stream_failed", "Timeout getting stream source"
          )
  
  
  @websocket_api.websocket_command(
      {
          vol.Required("type"): "camera/web_rtc_offer",
          vol.Required("entity_id"): cv.entity_id,
          vol.Required("offer"): str,
      }
  )
  @websocket_api.async_response
  async def ws_camera_web_rtc_offer(
      hass: HomeAssistant, connection: ActiveConnection, msg: dict
  ) -> None:
      """Handle the signal path for a WebRTC stream.
  
      This signal path is used to route the offer created by the client to the
      camera device through the integration for negotiation on initial setup,
      which returns an answer. The actual streaming is handled entirely between
      the client and camera device.
  
      Async friendly.
      """
      entity_id = msg["entity_id"]
      offer = msg["offer"]
      camera = _get_camera_from_entity_id(hass, entity_id)
      if camera.frontend_stream_type != StreamType.WEB_RTC:
          connection.send_error(
              msg["id"],
              "web_rtc_offer_failed",
              f"Camera does not support WebRTC, frontend_stream_type={camera.frontend_stream_type}",
          )
          return
      try:
          answer = await camera.async_handle_web_rtc_offer(offer)
      except (HomeAssistantError, ValueError) as ex:
          _LOGGER.error("Error handling WebRTC offer: %s", ex)
          connection.send_error(msg["id"], "web_rtc_offer_failed", str(ex))
      except asyncio.TimeoutError:
          _LOGGER.error("Timeout handling WebRTC offer")
          connection.send_error(
              msg["id"], "web_rtc_offer_failed", "Timeout handling WebRTC offer"
          )
      else:
          connection.send_result(msg["id"], {"answer": answer})
  
  
  @websocket_api.websocket_command(
      {vol.Required("type"): "camera/get_prefs", vol.Required("entity_id"): cv.entity_id}
  )
  @websocket_api.async_response
  async def websocket_get_prefs(
      hass: HomeAssistant, connection: ActiveConnection, msg: dict
  ) -> None:
      """Handle request for account info."""
      prefs = hass.data[DATA_CAMERA_PREFS].get(msg["entity_id"])
      connection.send_result(msg["id"], prefs.as_dict())
  
  
  @websocket_api.websocket_command(
      {
          vol.Required("type"): "camera/update_prefs",
          vol.Required("entity_id"): cv.entity_id,
          vol.Optional("preload_stream"): bool,
      }
  )
  @websocket_api.async_response
  async def websocket_update_prefs(
      hass: HomeAssistant, connection: ActiveConnection, msg: dict
  ) -> None:
      """Handle request for account info."""
      prefs = hass.data[DATA_CAMERA_PREFS]
  
      changes = dict(msg)
      changes.pop("id")
      changes.pop("type")
      entity_id = changes.pop("entity_id")
      await prefs.async_update(entity_id, **changes)
  
      connection.send_result(msg["id"], prefs.get(entity_id).as_dict())
  
  
  async def async_handle_snapshot_service(
      camera: Camera, service_call: ServiceCall
  ) -> None:
      """Handle snapshot services calls."""
      hass = camera.hass
      filename = service_call.data[ATTR_FILENAME]
      filename.hass = hass
  
      snapshot_file = filename.async_render(variables={ATTR_ENTITY_ID: camera})
  
      # check if we allow to access to that file
      if not hass.config.is_allowed_path(snapshot_file):
          _LOGGER.error("Can't write %s, no access to path!", snapshot_file)
          return
  
      image = await camera.async_camera_image()
  
      if image is None:
          return
  
      def _write_image(to_file: str, image_data: bytes) -> None:
          """Executor helper to write image."""
          os.makedirs(os.path.dirname(to_file), exist_ok=True)
          with open(to_file, "wb") as img_file:
              img_file.write(image_data)
  
      try:
          await hass.async_add_executor_job(_write_image, snapshot_file, image)
      except OSError as err:
          _LOGGER.error("Can't write image to file: %s", err)
  
  
  async def async_handle_play_stream_service(
      camera: Camera, service_call: ServiceCall
  ) -> None:
      """Handle play stream services calls."""
      hass = camera.hass
      fmt = service_call.data[ATTR_FORMAT]
      url = await _async_stream_endpoint_url(camera.hass, camera, fmt)
      url = f"{get_url(hass)}{url}"
  
      await hass.services.async_call(
          DOMAIN_MP,
          SERVICE_PLAY_MEDIA,
          {
              ATTR_ENTITY_ID: service_call.data[ATTR_MEDIA_PLAYER],
              ATTR_MEDIA_CONTENT_ID: url,
              ATTR_MEDIA_CONTENT_TYPE: FORMAT_CONTENT_TYPE[fmt],
          },
          blocking=True,
          context=service_call.context,
      )
  
  
  async def _async_stream_endpoint_url(
      hass: HomeAssistant, camera: Camera, fmt: str
  ) -> str:
      stream = await camera.async_create_stream()
      if not stream:
          raise HomeAssistantError(
              f"{camera.entity_id} does not support play stream service"
          )
  
      # Update keepalive setting which manages idle shutdown
      camera_prefs = hass.data[DATA_CAMERA_PREFS].get(camera.entity_id)
      stream.keepalive = camera_prefs.preload_stream
  
      stream.add_provider(fmt)
      await stream.start()
      return stream.endpoint_url(fmt)
  
  
  async def async_handle_record_service(
      camera: Camera, service_call: ServiceCall
  ) -> None:
      """Handle stream recording service calls."""
      stream = await camera.async_create_stream()
  
      if not stream:
          raise HomeAssistantError(f"{camera.entity_id} does not support record service")
  
      hass = camera.hass
      filename = service_call.data[CONF_FILENAME]
      filename.hass = hass
      video_path = filename.async_render(variables={ATTR_ENTITY_ID: camera})
  
      await stream.async_record(
          video_path,
          duration=service_call.data[CONF_DURATION],
          lookback=service_call.data[CONF_LOOKBACK],
      )
  