"""Number platform for Remote Media Player integration (display brightness)."""

from __future__ import annotations

import logging
from typing import Any

from homeassistant.components.number import NumberEntity, NumberMode
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity import DeviceInfo
from homeassistant.helpers.entity_platform import AddEntitiesCallback

from .api_client import MediaServerClient, MediaServerError
from .const import DOMAIN

_LOGGER = logging.getLogger(__name__)


async def async_setup_entry(
    hass: HomeAssistant,
    entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up display brightness number entities from a config entry."""
    client: MediaServerClient = hass.data[DOMAIN][entry.entry_id]["client"]

    try:
        monitors = await client.get_display_monitors()
    except MediaServerError as err:
        _LOGGER.error("Failed to fetch display monitors: %s", err)
        return

    entities = [
        DisplayBrightnessNumber(
            client=client,
            entry=entry,
            monitor=monitor,
        )
        for monitor in monitors
        if monitor.get("brightness") is not None
    ]

    if entities:
        async_add_entities(entities)
        _LOGGER.info("Added %d display brightness entities", len(entities))


class DisplayBrightnessNumber(NumberEntity):
    """Number entity for controlling display brightness."""

    _attr_has_entity_name = True
    _attr_native_min_value = 0
    _attr_native_max_value = 100
    _attr_native_step = 1
    _attr_native_unit_of_measurement = "%"
    _attr_mode = NumberMode.SLIDER
    _attr_icon = "mdi:brightness-6"

    def __init__(
        self,
        client: MediaServerClient,
        entry: ConfigEntry,
        monitor: dict[str, Any],
    ) -> None:
        """Initialize the display brightness entity."""
        self._client = client
        self._entry = entry
        self._monitor_id: int = monitor["id"]
        self._monitor_name: str = monitor.get("name", f"Monitor {monitor['id']}")
        self._resolution: str | None = monitor.get("resolution")
        self._attr_native_value = monitor.get("brightness")

        # Use resolution in name to disambiguate same-name monitors
        display_name = self._monitor_name
        if self._resolution:
            display_name = f"{self._monitor_name} ({self._resolution})"

        self._attr_unique_id = f"{entry.entry_id}_display_brightness_{self._monitor_id}"
        self._attr_name = f"Display {display_name} Brightness"

    @property
    def device_info(self) -> DeviceInfo:
        """Return device info."""
        return DeviceInfo(
            identifiers={(DOMAIN, self._entry.entry_id)},
            name=self._entry.title,
            manufacturer="Remote Media Player",
            model="Media Server",
        )

    async def async_set_native_value(self, value: float) -> None:
        """Set the brightness value."""
        try:
            await self._client.set_display_brightness(self._monitor_id, int(value))
            self._attr_native_value = int(value)
            self.async_write_ha_state()
        except MediaServerError as err:
            _LOGGER.error("Failed to set brightness for monitor %d: %s", self._monitor_id, err)

    async def async_update(self) -> None:
        """Fetch updated brightness from the server."""
        try:
            monitors = await self._client.get_display_monitors()
            for monitor in monitors:
                if monitor["id"] == self._monitor_id:
                    self._attr_native_value = monitor.get("brightness")
                    break
        except MediaServerError as err:
            _LOGGER.error("Failed to update brightness for monitor %d: %s", self._monitor_id, err)