"""Support for Ubiquiti's UniFi Protect NVR."""
from __future__ import annotations

import logging
from typing import Any, cast

from pyunifiprotect.data import (
    Camera,
    ModelType,
    ProtectAdoptableDeviceModel,
    ProtectModelWithId,
    StateType,
)
from pyunifiprotect.exceptions import StreamError

from homeassistant.components import media_source
from homeassistant.components.media_player import (
    BrowseMedia,
    MediaPlayerDeviceClass,
    MediaPlayerEntity,
    MediaPlayerEntityDescription,
    MediaPlayerEntityFeature,
    MediaPlayerState,
    MediaType,
    async_process_play_media_url,
)
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant, callback
from homeassistant.exceptions import HomeAssistantError
from homeassistant.helpers.dispatcher import async_dispatcher_connect
from homeassistant.helpers.entity_platform import AddEntitiesCallback

from .const import DISPATCH_ADOPT, DOMAIN
from .data import ProtectData
from .entity import ProtectDeviceEntity
from .utils import async_dispatch_id as _ufpd

_LOGGER = logging.getLogger(__name__)


async def async_setup_entry(
    hass: HomeAssistant,
    entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Discover cameras with speakers on a UniFi Protect NVR."""
    data: ProtectData = hass.data[DOMAIN][entry.entry_id]

    async def _add_new_device(device: ProtectAdoptableDeviceModel) -> None:
        if isinstance(device, Camera) and (
            device.has_speaker or device.has_removable_speaker
        ):
            async_add_entities([ProtectMediaPlayer(data, device)])

    entry.async_on_unload(
        async_dispatcher_connect(hass, _ufpd(entry, DISPATCH_ADOPT), _add_new_device)
    )

    entities = []
    for device in data.get_by_types({ModelType.CAMERA}):
        device = cast(Camera, device)
        if device.has_speaker or device.has_removable_speaker:
            entities.append(ProtectMediaPlayer(data, device))

    async_add_entities(entities)


class ProtectMediaPlayer(ProtectDeviceEntity, MediaPlayerEntity):
    """A Ubiquiti UniFi Protect Speaker."""

    device: Camera
    entity_description: MediaPlayerEntityDescription
    _attr_supported_features = (
        MediaPlayerEntityFeature.PLAY_MEDIA
        | MediaPlayerEntityFeature.VOLUME_SET
        | MediaPlayerEntityFeature.VOLUME_STEP
        | MediaPlayerEntityFeature.STOP
        | MediaPlayerEntityFeature.BROWSE_MEDIA
    )

    def __init__(
        self,
        data: ProtectData,
        camera: Camera,
    ) -> None:
        """Initialize an UniFi speaker."""
        super().__init__(
            data,
            camera,
            MediaPlayerEntityDescription(
                key="speaker", device_class=MediaPlayerDeviceClass.SPEAKER
            ),
        )

        self._attr_name = f"{self.device.display_name} Speaker"
        self._attr_media_content_type = MediaType.MUSIC

    @callback
    def _async_update_device_from_protect(self, device: ProtectModelWithId) -> None:
        super()._async_update_device_from_protect(device)
        updated_device = self.device
        self._attr_volume_level = float(updated_device.speaker_settings.volume / 100)

        if (
            updated_device.talkback_stream is not None
            and updated_device.talkback_stream.is_running
        ):
            self._attr_state = MediaPlayerState.PLAYING
        else:
            self._attr_state = MediaPlayerState.IDLE

        is_connected = self.data.last_update_success and (
            updated_device.state == StateType.CONNECTED
            or (not updated_device.is_adopted_by_us and updated_device.can_adopt)
        )
        self._attr_available = is_connected and updated_device.feature_flags.has_speaker

    @callback
    def _async_updated_event(self, device: ProtectModelWithId) -> None:
        """Call back for incoming data that only writes when state has changed.

        Only the state, volume, and available are ever updated for these
        entities, and since the websocket update for the device will trigger
        an update for all entities connected to the device, we want to avoid
        writing state unless something has actually changed.
        """
        previous_state = self._attr_state
        previous_available = self._attr_available
        previous_volume_level = self._attr_volume_level
        self._async_update_device_from_protect(device)
        if (
            self._attr_state != previous_state
            or self._attr_volume_level != previous_volume_level
            or self._attr_available != previous_available
        ):
            self.async_write_ha_state()

    async def async_set_volume_level(self, volume: float) -> None:
        """Set volume level, range 0..1."""

        volume_int = int(volume * 100)
        await self.device.set_speaker_volume(volume_int)

    async def async_media_stop(self) -> None:
        """Send stop command."""

        if (
            self.device.talkback_stream is not None
            and self.device.talkback_stream.is_running
        ):
            _LOGGER.debug("Stopping playback for %s Speaker", self.device.display_name)
            await self.device.stop_audio()
            self._async_updated_event(self.device)

    async def async_play_media(
        self, media_type: MediaType | str, media_id: str, **kwargs: Any
    ) -> None:
        """Play a piece of media."""
        if media_source.is_media_source_id(media_id):
            media_type = MediaType.MUSIC
            play_item = await media_source.async_resolve_media(
                self.hass, media_id, self.entity_id
            )
            media_id = async_process_play_media_url(self.hass, play_item.url)

        if media_type != MediaType.MUSIC:
            raise HomeAssistantError("Only music media type is supported")

        _LOGGER.debug(
            "Playing Media %s for %s Speaker", media_id, self.device.display_name
        )
        await self.async_media_stop()
        try:
            await self.device.play_audio(media_id, blocking=False)
        except StreamError as err:
            raise HomeAssistantError(err) from err

        # update state after starting player
        self._async_updated_event(self.device)
        # wait until player finishes to update state again
        await self.device.wait_until_audio_completes()

        self._async_updated_event(self.device)

    async def async_browse_media(
        self,
        media_content_type: MediaType | str | None = None,
        media_content_id: str | None = None,
    ) -> BrowseMedia:
        """Implement the websocket media browsing helper."""
        return await media_source.async_browse_media(
            self.hass,
            media_content_id,
            content_filter=lambda item: item.media_content_type.startswith("audio/"),
        )