"""Support for ONVIF Cameras with FFmpeg as decoder."""
from __future__ import annotations

import asyncio

from haffmpeg.camera import CameraMjpeg
from onvif.exceptions import ONVIFError
import voluptuous as vol
from yarl import URL

from homeassistant.components import ffmpeg
from homeassistant.components.camera import Camera, CameraEntityFeature
from homeassistant.components.ffmpeg import CONF_EXTRA_ARGUMENTS, get_ffmpeg_manager
from homeassistant.components.stream import (
    CONF_RTSP_TRANSPORT,
    CONF_USE_WALLCLOCK_AS_TIMESTAMPS,
    RTSP_TRANSPORTS,
)
from homeassistant.config_entries import ConfigEntry
from homeassistant.const import HTTP_BASIC_AUTHENTICATION
from homeassistant.core import HomeAssistant
from homeassistant.helpers import config_validation as cv, entity_platform
from homeassistant.helpers.aiohttp_client import async_aiohttp_proxy_stream
from homeassistant.helpers.entity_platform import AddEntitiesCallback

from .base import ONVIFBaseEntity
from .const import (
    ABSOLUTE_MOVE,
    ATTR_CONTINUOUS_DURATION,
    ATTR_DISTANCE,
    ATTR_MOVE_MODE,
    ATTR_PAN,
    ATTR_PRESET,
    ATTR_SPEED,
    ATTR_TILT,
    ATTR_ZOOM,
    CONF_SNAPSHOT_AUTH,
    CONTINUOUS_MOVE,
    DIR_DOWN,
    DIR_LEFT,
    DIR_RIGHT,
    DIR_UP,
    DOMAIN,
    GOTOPRESET_MOVE,
    LOGGER,
    RELATIVE_MOVE,
    SERVICE_PTZ,
    STOP_MOVE,
    ZOOM_IN,
    ZOOM_OUT,
)
from .device import ONVIFDevice
from .models import Profile


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up the ONVIF camera video stream."""
    platform = entity_platform.async_get_current_platform()

    # Create PTZ service
    platform.async_register_entity_service(
        SERVICE_PTZ,
        {
            vol.Optional(ATTR_PAN): vol.In([DIR_LEFT, DIR_RIGHT]),
            vol.Optional(ATTR_TILT): vol.In([DIR_UP, DIR_DOWN]),
            vol.Optional(ATTR_ZOOM): vol.In([ZOOM_OUT, ZOOM_IN]),
            vol.Optional(ATTR_DISTANCE, default=0.1): cv.small_float,
            vol.Optional(ATTR_SPEED, default=0.5): cv.small_float,
            vol.Optional(ATTR_MOVE_MODE, default=RELATIVE_MOVE): vol.In(
                [
                    CONTINUOUS_MOVE,
                    RELATIVE_MOVE,
                    ABSOLUTE_MOVE,
                    GOTOPRESET_MOVE,
                    STOP_MOVE,
                ]
            ),
            vol.Optional(ATTR_CONTINUOUS_DURATION, default=0.5): cv.small_float,
            vol.Optional(ATTR_PRESET, default="0"): cv.string,
        },
        "async_perform_ptz",
    )

    device = hass.data[DOMAIN][config_entry.unique_id]
    async_add_entities(
        [ONVIFCameraEntity(device, profile) for profile in device.profiles]
    )


class ONVIFCameraEntity(ONVIFBaseEntity, Camera):
    """Representation of an ONVIF camera."""

    _attr_supported_features = CameraEntityFeature.STREAM

    def __init__(self, device: ONVIFDevice, profile: Profile) -> None:
        """Initialize ONVIF camera entity."""
        ONVIFBaseEntity.__init__(self, device)
        Camera.__init__(self)
        self.profile = profile
        self.stream_options[CONF_RTSP_TRANSPORT] = device.config_entry.options.get(
            CONF_RTSP_TRANSPORT, next(iter(RTSP_TRANSPORTS))
        )
        self.stream_options[
            CONF_USE_WALLCLOCK_AS_TIMESTAMPS
        ] = device.config_entry.options.get(CONF_USE_WALLCLOCK_AS_TIMESTAMPS, False)
        self._basic_auth = (
            device.config_entry.data.get(CONF_SNAPSHOT_AUTH)
            == HTTP_BASIC_AUTHENTICATION
        )
        self._stream_uri: str | None = None
        self._stream_uri_future: asyncio.Future[str] | None = None

    @property
    def name(self) -> str:
        """Return the name of this camera."""
        return f"{self.device.name} {self.profile.name}"

    @property
    def unique_id(self) -> str:
        """Return a unique ID."""
        if self.profile.index:
            return f"{self.mac_or_serial}_{self.profile.index}"
        return self.mac_or_serial

    @property
    def entity_registry_enabled_default(self) -> bool:
        """Return if the entity should be enabled when first added to the entity registry."""
        return self.device.max_resolution == self.profile.video.resolution.width

    async def stream_source(self):
        """Return the stream source."""
        return await self._async_get_stream_uri()

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

        if self.stream and self.stream.dynamic_stream_settings.preload_stream:
            return await self.stream.async_get_image(width, height)

        if self.device.capabilities.snapshot:
            try:
                if image := await self.device.device.get_snapshot(
                    self.profile.token, self._basic_auth
                ):
                    return image
            except ONVIFError as err:
                LOGGER.error(
                    "Fetch snapshot image failed from %s, falling back to FFmpeg; %s",
                    self.device.name,
                    err,
                )
            else:
                LOGGER.error(
                    "Fetch snapshot image failed from %s, falling back to FFmpeg",
                    self.device.name,
                )

        stream_uri = await self._async_get_stream_uri()
        return await ffmpeg.async_get_image(
            self.hass,
            stream_uri,
            extra_cmd=self.device.config_entry.options.get(CONF_EXTRA_ARGUMENTS),
            width=width,
            height=height,
        )

    async def handle_async_mjpeg_stream(self, request):
        """Generate an HTTP MJPEG stream from the camera."""
        LOGGER.debug("Handling mjpeg stream from camera '%s'", self.device.name)

        ffmpeg_manager = get_ffmpeg_manager(self.hass)
        stream = CameraMjpeg(ffmpeg_manager.binary)
        stream_uri = await self._async_get_stream_uri()

        await stream.open_camera(
            stream_uri,
            extra_cmd=self.device.config_entry.options.get(CONF_EXTRA_ARGUMENTS),
        )

        try:
            stream_reader = await stream.get_reader()
            return await async_aiohttp_proxy_stream(
                self.hass,
                request,
                stream_reader,
                ffmpeg_manager.ffmpeg_stream_content_type,
            )
        finally:
            await stream.close()

    async def _async_get_stream_uri(self) -> str:
        """Return the stream URI."""
        if self._stream_uri:
            return self._stream_uri
        if self._stream_uri_future:
            return await self._stream_uri_future
        loop = asyncio.get_running_loop()
        self._stream_uri_future = loop.create_future()
        try:
            uri_no_auth = await self.device.async_get_stream_uri(self.profile)
        except (asyncio.TimeoutError, Exception) as err:
            LOGGER.error("Failed to get stream uri: %s", err)
            if self._stream_uri_future:
                self._stream_uri_future.set_exception(err)
            raise
        url = URL(uri_no_auth)
        url = url.with_user(self.device.username)
        url = url.with_password(self.device.password)
        self._stream_uri = str(url)
        self._stream_uri_future.set_result(self._stream_uri)
        return self._stream_uri

    async def async_perform_ptz(
        self,
        distance,
        speed,
        move_mode,
        continuous_duration,
        preset,
        pan=None,
        tilt=None,
        zoom=None,
    ) -> None:
        """Perform a PTZ action on the camera."""
        await self.device.async_perform_ptz(
            self.profile,
            distance,
            speed,
            move_mode,
            continuous_duration,
            preset,
            pan,
            tilt,
            zoom,
        )
