"""Diagnostic binary sensors per display (primary, DDC/CI power-control support)."""

from __future__ import annotations

import logging
from typing import Any

from homeassistant.components.binary_sensor import BinarySensorEntity
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity import EntityCategory
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.update_coordinator import CoordinatorEntity

from .const import DOMAIN
from .display_coordinator import DisplayCoordinator
from .display_device import display_device_info

_LOGGER = logging.getLogger(__name__)


async def async_setup_entry(
    hass: HomeAssistant,
    entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up per-display binary sensor entities."""
    coordinator: DisplayCoordinator = hass.data[DOMAIN][entry.entry_id][
        "display_coordinator"
    ]

    if not coordinator.data:
        return

    entities: list[Any] = []
    for monitor in coordinator.data.values():
        entities.append(DisplayPrimaryBinarySensor(coordinator, entry, monitor))
        entities.append(DisplayPowerControlBinarySensor(coordinator, entry, monitor))

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


class _DisplayBinarySensorBase(
    CoordinatorEntity[DisplayCoordinator], BinarySensorEntity
):
    """Common boilerplate for per-display diagnostic binary sensors."""

    _attr_has_entity_name = True
    _attr_entity_category = EntityCategory.DIAGNOSTIC

    def __init__(
        self,
        coordinator: DisplayCoordinator,
        entry: ConfigEntry,
        monitor: dict[str, Any],
    ) -> None:
        super().__init__(coordinator)
        self._monitor_id: int = monitor["id"]
        self._attr_device_info = display_device_info(entry, monitor)

    @property
    def _monitor(self) -> dict[str, Any]:
        if self.coordinator.data is None:
            return {}
        return self.coordinator.data.get(self._monitor_id, {})


class DisplayPrimaryBinarySensor(_DisplayBinarySensorBase):
    """Indicates whether the display is the OS primary monitor."""

    _attr_name = "Primary display"
    _attr_icon = "mdi:monitor-star"

    def __init__(
        self,
        coordinator: DisplayCoordinator,
        entry: ConfigEntry,
        monitor: dict[str, Any],
    ) -> None:
        super().__init__(coordinator, entry, monitor)
        self._attr_unique_id = f"{entry.entry_id}_display_primary_{self._monitor_id}"

    @property
    def is_on(self) -> bool:
        return bool(self._monitor.get("is_primary"))


class DisplayPowerControlBinarySensor(_DisplayBinarySensorBase):
    """Indicates whether DDC/CI power control is available for this display."""

    _attr_name = "Power control supported"
    _attr_icon = "mdi:power-plug"

    def __init__(
        self,
        coordinator: DisplayCoordinator,
        entry: ConfigEntry,
        monitor: dict[str, Any],
    ) -> None:
        super().__init__(coordinator, entry, monitor)
        self._attr_unique_id = (
            f"{entry.entry_id}_display_power_supported_{self._monitor_id}"
        )

    @property
    def is_on(self) -> bool:
        return bool(self._monitor.get("power_supported"))