"""Services for the Emby Media Player integration."""

from __future__ import annotations

import logging
from typing import TYPE_CHECKING

import voluptuous as vol

from homeassistant.components.media_player import DOMAIN as MEDIA_PLAYER_DOMAIN
from homeassistant.config_entries import ConfigEntryState
from homeassistant.const import ATTR_ENTITY_ID
from homeassistant.core import HomeAssistant, ServiceCall
from homeassistant.exceptions import HomeAssistantError, ServiceValidationError
from homeassistant.helpers import config_validation as cv
from homeassistant.helpers import entity_registry as er

from .api import EmbyApiError
from .const import (
    ATTR_HEADER,
    ATTR_MESSAGE,
    ATTR_REPEAT_MODE,
    ATTR_TIMEOUT_MS,
    DOMAIN,
    REPEAT_MODE_ALL,
    REPEAT_MODE_NONE,
    REPEAT_MODE_ONE,
)

if TYPE_CHECKING:
    from . import EmbyRuntimeData
    from .api import EmbyApiClient

_LOGGER = logging.getLogger(__name__)

SERVICE_SEND_MESSAGE = "send_message"
SERVICE_SET_REPEAT = "set_repeat"
SERVICE_REFRESH_LIBRARY = "refresh_library"

_REPEAT_MODES = (REPEAT_MODE_NONE, REPEAT_MODE_ONE, REPEAT_MODE_ALL)

_SEND_MESSAGE_SCHEMA = vol.Schema(
    {
        vol.Required(ATTR_ENTITY_ID): cv.entity_ids,
        vol.Required(ATTR_MESSAGE): cv.string,
        vol.Optional(ATTR_HEADER): cv.string,
        vol.Optional(ATTR_TIMEOUT_MS): vol.All(
            cv.positive_int, vol.Range(min=100, max=60000)
        ),
    }
)

_SET_REPEAT_SCHEMA = vol.Schema(
    {
        vol.Required(ATTR_ENTITY_ID): cv.entity_ids,
        vol.Required(ATTR_REPEAT_MODE): vol.In(_REPEAT_MODES),
    }
)

_REFRESH_LIBRARY_SCHEMA = vol.Schema(
    {
        vol.Optional(ATTR_ENTITY_ID): cv.entity_ids,
    }
)


def _resolve_sessions(
    hass: HomeAssistant, entity_ids: list[str]
) -> list[tuple["EmbyRuntimeData", str]]:
    """Resolve entity_ids into (runtime_data, session_id) pairs."""
    entity_registry = er.async_get(hass)
    resolved: list[tuple[EmbyRuntimeData, str]] = []

    for entity_id in entity_ids:
        entry = entity_registry.async_get(entity_id)
        if (
            entry is None
            or entry.platform != DOMAIN
            or entry.domain != MEDIA_PLAYER_DOMAIN
        ):
            raise ServiceValidationError(
                f"{entity_id} is not an Emby media player"
            )

        config_entry = hass.config_entries.async_get_entry(entry.config_entry_id)
        if (
            config_entry is None
            or config_entry.state is not ConfigEntryState.LOADED
        ):
            raise HomeAssistantError(
                f"Emby integration for {entity_id} is not loaded"
            )

        # unique_id is "{entry_id}_{session_id}"
        prefix = f"{config_entry.entry_id}_"
        unique_id = entry.unique_id or ""
        if not unique_id.startswith(prefix):
            raise HomeAssistantError(
                f"Cannot resolve session for {entity_id}"
            )
        session_id = unique_id.removeprefix(prefix)
        resolved.append((config_entry.runtime_data, session_id))

    return resolved


def _resolve_apis(
    hass: HomeAssistant, entity_ids: list[str] | None
) -> list["EmbyApiClient"]:
    """Resolve unique API clients for the supplied entities, or all entries."""
    if entity_ids:
        return [rd.api for rd, _ in _resolve_sessions(hass, entity_ids)]

    return [
        entry.runtime_data.api
        for entry in hass.config_entries.async_entries(DOMAIN)
        if entry.state is ConfigEntryState.LOADED
    ]


async def async_setup_services(hass: HomeAssistant) -> None:
    """Register integration-level services (idempotent)."""

    if hass.services.has_service(DOMAIN, SERVICE_SEND_MESSAGE):
        return

    async def _send_message(call: ServiceCall) -> None:
        targets = _resolve_sessions(hass, call.data[ATTR_ENTITY_ID])
        message = call.data[ATTR_MESSAGE]
        header = call.data.get(ATTR_HEADER)
        timeout_ms = call.data.get(ATTR_TIMEOUT_MS)

        errors: list[str] = []
        for runtime_data, session_id in targets:
            try:
                await runtime_data.api.display_message(
                    session_id, message, header=header, timeout_ms=timeout_ms
                )
            except EmbyApiError as err:
                errors.append(f"{session_id}: {err}")

        if errors:
            raise HomeAssistantError(
                "Failed to send message to: " + "; ".join(errors)
            )

    async def _set_repeat(call: ServiceCall) -> None:
        targets = _resolve_sessions(hass, call.data[ATTR_ENTITY_ID])
        mode = call.data[ATTR_REPEAT_MODE]

        errors: list[str] = []
        for runtime_data, session_id in targets:
            try:
                await runtime_data.api.set_repeat_mode(session_id, mode)
            except EmbyApiError as err:
                errors.append(f"{session_id}: {err}")

        if errors:
            raise HomeAssistantError(
                "Failed to set repeat mode on: " + "; ".join(errors)
            )

    async def _refresh_library(call: ServiceCall) -> None:
        apis = _resolve_apis(hass, call.data.get(ATTR_ENTITY_ID))
        # De-duplicate API instances (multiple entities can share one server).
        seen: set[int] = set()
        errors: list[str] = []
        for api in apis:
            if id(api) in seen:
                continue
            seen.add(id(api))
            try:
                await api.refresh_library()
            except EmbyApiError as err:
                errors.append(str(err))

        if errors:
            raise HomeAssistantError(
                "Failed to refresh library on one or more servers: "
                + "; ".join(errors)
            )

    hass.services.async_register(
        DOMAIN, SERVICE_SEND_MESSAGE, _send_message, schema=_SEND_MESSAGE_SCHEMA
    )
    hass.services.async_register(
        DOMAIN, SERVICE_SET_REPEAT, _set_repeat, schema=_SET_REPEAT_SCHEMA
    )
    hass.services.async_register(
        DOMAIN,
        SERVICE_REFRESH_LIBRARY,
        _refresh_library,
        schema=_REFRESH_LIBRARY_SCHEMA,
    )


def async_unload_services(hass: HomeAssistant) -> None:
    """Remove integration-level services."""
    for service in (
        SERVICE_SEND_MESSAGE,
        SERVICE_SET_REPEAT,
        SERVICE_REFRESH_LIBRARY,
    ):
        if hass.services.has_service(DOMAIN, service):
            hass.services.async_remove(DOMAIN, service)