# -*- coding: utf-8 -*-
"""
High-Level Satellite API für Plugins.

Bietet eine einfache Schnittstelle für die Interaktion mit Satellites.
"""

from __future__ import annotations

import asyncio
import uuid
from dataclasses import dataclass, field
from datetime import datetime
from enum import Enum, auto
from typing import TYPE_CHECKING, Any, Callable, Coroutine, Iterator

if TYPE_CHECKING:
    from trixy_core.satellite.satellite import Satellite
    from trixy_core.satellite.satellite_manager import SatelliteManager
    from trixy_core.application import IApplication


class StreamState(Enum):
    """Zustand eines Audio-Streams."""
    IDLE = auto()
    PLAYING = auto()
    PAUSED = auto()
    STOPPED = auto()


@dataclass
class TTSRequest:
    """
    Anfrage für Text-to-Speech.
    """

    id: str
    """Eindeutige Anfrage-ID."""

    text: str
    """Zu sprechender Text."""

    satellite_ids: list[str]
    """Ziel-Satellites."""

    voice: str = "default"
    """Stimme/Profil."""

    speed: float = 1.0
    """Sprechgeschwindigkeit."""

    volume: float = 1.0
    """Lautstärke (0.0-1.0)."""

    priority: int = 0
    """Priorität (höher = wichtiger)."""

    created_at: datetime = field(default_factory=datetime.now)
    """Erstellungszeitpunkt."""


@dataclass
class StreamSession:
    """
    Eine Audio-Streaming-Session.

    Verwaltet das Streaming von Audio zu mehreren Satellites.
    """

    id: str
    """Session-ID."""

    state: StreamState = StreamState.IDLE
    """Aktueller Zustand."""

    satellite_ids: set[str] = field(default_factory=set)
    """Verbundene Satellites."""

    source: str = ""
    """Aktuelle Audio-Quelle."""

    volume: float = 1.0
    """Lautstärke."""

    created_at: datetime = field(default_factory=datetime.now)
    """Erstellungszeitpunkt."""

    metadata: dict[str, Any] = field(default_factory=dict)
    """Zusätzliche Metadaten."""


class SatelliteProxy:
    """
    Proxy für einzelnen Satellite mit High-Level-API.

    Ermöglicht einfache Interaktion mit einem Satellite.

    Example:
        satellite = api.satellites[0]
        await satellite.say("Hallo Welt")
        await satellite.play("http://musik.mp3")
        await satellite.stop()
    """

    def __init__(
        self,
        satellite: "Satellite",
        api: "SatelliteAPI",
    ) -> None:
        """
        Initialisiert den Proxy.

        Args:
            satellite: Der zugrundeliegende Satellite.
            api: Referenz zur API.
        """
        self._satellite = satellite
        self._api = api

    @property
    def id(self) -> str:
        """Satellite-ID."""
        return self._satellite.id

    @property
    def alias(self) -> str:
        """Alias/Name."""
        return self._satellite.alias

    @property
    def room(self) -> str:
        """Raum."""
        return self._satellite.room_id

    @property
    def is_connected(self) -> bool:
        """Verbindungsstatus."""
        return self._satellite.is_connected

    @property
    def raw(self) -> "Satellite":
        """Zugriff auf das rohe Satellite-Objekt."""
        return self._satellite

    async def say(
        self,
        text: str,
        voice: str = "default",
        speed: float = 1.0,
        volume: float = 1.0,
        wait: bool = True,
    ) -> bool:
        """
        Spricht Text über TTS.

        Args:
            text: Der zu sprechende Text.
            voice: Stimme/Profil.
            speed: Sprechgeschwindigkeit.
            volume: Lautstärke.
            wait: Ob auf Abschluss gewartet wird.

        Returns:
            True bei Erfolg.
        """
        return await self._api.say(
            text,
            satellites=[self._satellite.id],
            voice=voice,
            speed=speed,
            volume=volume,
            wait=wait,
        )

    async def say_raw(self, audio_data: bytes) -> bool:
        """
        Sendet rohe Audio-Daten.

        Args:
            audio_data: Audio-Bytes (16KHz, 16-bit, mono).

        Returns:
            True bei Erfolg.
        """
        return await self._satellite.say(audio_data)

    async def play(
        self,
        source: str,
        volume: float = 1.0,
    ) -> StreamSession | None:
        """
        Startet Audio/Musik-Wiedergabe.

        Args:
            source: Audio-Quelle (URL oder Dateipfad).
            volume: Lautstärke.

        Returns:
            StreamSession oder None bei Fehler.
        """
        return await self._api.play(
            source,
            satellites=[self._satellite.id],
            volume=volume,
        )

    async def stop(self) -> bool:
        """
        Stoppt alle Wiedergabe.

        Returns:
            True bei Erfolg.
        """
        return await self._api.stop_satellite(self._satellite.id)

    async def set_volume(self, volume: float) -> bool:
        """
        Setzt die Lautstärke.

        Args:
            volume: Lautstärke (0.0-1.0).

        Returns:
            True bei Erfolg.
        """
        return await self._api.set_volume(self._satellite.id, volume)

    def __repr__(self) -> str:
        return f"SatelliteProxy({self.alias!r}, room={self.room!r})"


class SatelliteCollection:
    """
    Sammlung von Satellites mit Index-Zugriff.

    Ermöglicht verschiedene Zugriffsmethoden auf Satellites.

    Example:
        # Nach Index
        satellite = api.satellites[0]

        # Nach Alias
        satellite = api.satellites["wohnzimmer"]

        # Nach Raum
        satellites = api.satellites.room("küche")

        # Alle verbundenen
        for sat in api.satellites.connected:
            await sat.say("Hallo")
    """

    def __init__(
        self,
        manager: "SatelliteManager",
        api: "SatelliteAPI",
    ) -> None:
        """
        Initialisiert die Collection.

        Args:
            manager: Der SatelliteManager.
            api: Referenz zur API.
        """
        self._manager = manager
        self._api = api

    def __getitem__(self, key: int | str) -> SatelliteProxy | list[SatelliteProxy]:
        """
        Zugriff nach Index, ID, Alias oder Selektor.

        Args:
            key: Index (int), ID, Alias oder Selektor ("room:name").

        Returns:
            SatelliteProxy oder Liste von Proxies.
        """
        if isinstance(key, int):
            satellite = self._manager[key]
            return SatelliteProxy(satellite, self._api)

        # Versuche als ID
        satellite = self._manager.get(key)
        if satellite:
            return SatelliteProxy(satellite, self._api)

        # Versuche als Alias
        for sat in self._manager:
            if sat.alias.lower() == key.lower():
                return SatelliteProxy(sat, self._api)

        # Selektor-Syntax
        if ":" in key:
            result = self._manager[key]
            if isinstance(result, list):
                return [SatelliteProxy(s, self._api) for s in result]
            return SatelliteProxy(result, self._api)

        raise KeyError(f"Satellite nicht gefunden: {key}")

    def __iter__(self) -> Iterator[SatelliteProxy]:
        """Iterator über alle Satellites."""
        for satellite in self._manager:
            yield SatelliteProxy(satellite, self._api)

    def __len__(self) -> int:
        """Anzahl der Satellites."""
        return len(self._manager)

    def __contains__(self, key: str) -> bool:
        """Prüft ob Satellite existiert."""
        return key in self._manager

    @property
    def all(self) -> list[SatelliteProxy]:
        """Alle Satellites."""
        return [SatelliteProxy(s, self._api) for s in self._manager.get_all()]

    @property
    def connected(self) -> list[SatelliteProxy]:
        """Alle verbundenen Satellites."""
        return [SatelliteProxy(s, self._api) for s in self._manager.get_connected()]

    @property
    def disconnected(self) -> list[SatelliteProxy]:
        """Alle getrennten Satellites."""
        return [SatelliteProxy(s, self._api) for s in self._manager.get_disconnected()]

    def room(self, room_id: str) -> list[SatelliteProxy]:
        """
        Satellites in einem Raum.

        Args:
            room_id: Raum-ID.

        Returns:
            Liste der Satellites im Raum.
        """
        return [SatelliteProxy(s, self._api) for s in self._manager.get_by_room(room_id)]

    def find(
        self,
        room: str | None = None,
        alias: str | None = None,
        connected: bool | None = None,
    ) -> list[SatelliteProxy]:
        """
        Sucht Satellites nach Kriterien.

        Args:
            room: Filter nach Raum.
            alias: Filter nach Alias (Teilübereinstimmung).
            connected: Filter nach Verbindungsstatus.

        Returns:
            Liste passender Satellites.
        """
        return [
            SatelliteProxy(s, self._api)
            for s in self._manager.find(room=room, alias=alias, connected=connected)
        ]


class SatelliteAPI:
    """
    High-Level API für Satellite-Interaktion.

    Bietet eine einfache Schnittstelle für Plugins.

    Example:
        api = SatelliteAPI(application)

        # Einzelner Satellite
        await api.satellites[0].say("Hallo")

        # Alle Satellites
        await api.say("Guten Morgen")

        # Bestimmter Raum
        await api.say("Willkommen", room="wohnzimmer")

        # Musik-Streaming
        stream = await api.play("http://radio.mp3")
        stream = await api.add_to_stream(stream.id, "küche")
    """

    def __init__(self, application: "IApplication") -> None:
        """
        Initialisiert die API.

        Args:
            application: Die Anwendungsinstanz.
        """
        self._application = application
        self._streams: dict[str, StreamSession] = {}
        self._tts_queue: asyncio.Queue[TTSRequest] = asyncio.Queue()

    @property
    def satellites(self) -> SatelliteCollection:
        """Zugriff auf Satellites."""
        manager = self._get_satellite_manager()
        return SatelliteCollection(manager, self)

    @property
    def streams(self) -> dict[str, StreamSession]:
        """Aktive Streams."""
        return dict(self._streams)

    def _get_satellite_manager(self) -> "SatelliteManager":
        """Holt den SatelliteManager."""
        # Annahme: SatelliteManager ist als Service registriert
        manager = getattr(self._application, "satellite_manager", None)
        if manager is None:
            # Fallback: Aus Service-Container
            container = getattr(self._application, "services", None)
            if container:
                manager = container.get("SatelliteManager")

        if manager is None:
            raise RuntimeError("SatelliteManager nicht verfügbar")

        return manager

    def _get_event_manager(self):
        """Holt den EventManager."""
        return getattr(self._application, "event_manager", None)

    async def say(
        self,
        text: str,
        satellites: list[str] | None = None,
        room: str | None = None,
        voice: str = "default",
        speed: float = 1.0,
        volume: float = 1.0,
        wait: bool = True,
        priority: int = 0,
    ) -> bool:
        """
        Spricht Text auf Satellites.

        Args:
            text: Der zu sprechende Text.
            satellites: Liste von Satellite-IDs (None = alle).
            room: Raum-Filter.
            voice: Stimme/Profil.
            speed: Sprechgeschwindigkeit.
            volume: Lautstärke.
            wait: Ob auf Abschluss gewartet wird.
            priority: Priorität.

        Returns:
            True bei Erfolg.
        """
        # Template-Platzhalter aufloesen
        from trixy_core.utils.template_formatter import format_template
        text = format_template(text, application=self._application)

        # Ziel-Satellites ermitteln
        target_ids = self._resolve_targets(satellites, room)
        if not target_ids:
            return False

        # TTS-Request erstellen
        request = TTSRequest(
            id=str(uuid.uuid4()),
            text=text,
            satellite_ids=target_ids,
            voice=voice,
            speed=speed,
            volume=volume,
            priority=priority,
        )

        # Event auslösen für TTS-Plugin
        event_manager = self._get_event_manager()
        if event_manager:
            from trixy_core.events.event_data.basic import TTSRequest as TTSRequestEvent

            event_data = TTSRequestEvent(
                request_id=request.id,
                satellite_id=",".join(target_ids),
                text=text,
                voice=voice,
                speed=speed,
                volume=volume,
                source="satellite_api.say"
            )

            if wait:
                # Warte-Logik mit Future
                completion_future: asyncio.Future[bool] = asyncio.Future()

                async def on_tts_completed(event_name: str, data) -> None:
                    """Handler für tts_completed Event."""
                    if getattr(data, "request_id", None) == request.id:
                        completion_future.set_result(getattr(data, "success", True))

                # Temporären Handler registrieren
                event_manager.register("tts_completed", on_tts_completed)

                try:
                    # Request auslösen
                    await event_manager.trigger("tts_request", event_data)

                    if event_data.is_cancelled():
                        return False

                    # Auf Abschluss warten (mit Timeout)
                    try:
                        await asyncio.wait_for(completion_future, timeout=60.0)
                    except asyncio.TimeoutError:
                        return False

                finally:
                    # Handler wieder entfernen
                    event_manager.unregister("tts_completed", on_tts_completed)

                return completion_future.result() if completion_future.done() else False
            else:
                # Ohne Warten
                await event_manager.trigger("tts_request", event_data)
                return not event_data.is_cancelled()

        return False

    async def say_raw(
        self,
        audio_data: bytes,
        satellites: list[str] | None = None,
        room: str | None = None,
    ) -> int:
        """
        Sendet rohe Audio-Daten.

        Args:
            audio_data: Audio-Bytes (16KHz, 16-bit, mono).
            satellites: Liste von Satellite-IDs.
            room: Raum-Filter.

        Returns:
            Anzahl erfolgreich gesendeter Satellites.
        """
        target_ids = self._resolve_targets(satellites, room)
        manager = self._get_satellite_manager()

        count = 0
        for sat_id in target_ids:
            satellite = manager.get(sat_id)
            if satellite and satellite.is_connected:
                if await satellite.say(audio_data):
                    count += 1

        return count

    async def play(
        self,
        source: str,
        satellites: list[str] | None = None,
        room: str | None = None,
        volume: float = 1.0,
    ) -> StreamSession | None:
        """
        Startet Audio-Streaming.

        Args:
            source: Audio-Quelle (URL, Dateipfad).
            satellites: Ziel-Satellites.
            room: Raum-Filter.
            volume: Lautstärke.

        Returns:
            StreamSession oder None.
        """
        target_ids = self._resolve_targets(satellites, room)
        if not target_ids:
            return None

        session = StreamSession(
            id=str(uuid.uuid4()),
            state=StreamState.PLAYING,
            satellite_ids=set(target_ids),
            source=source,
            volume=volume,
        )

        self._streams[session.id] = session

        # Event für Streaming-Start
        event_manager = self._get_event_manager()
        if event_manager:
            from trixy_core.events.event_data.base import EventData

            @dataclass
            class StreamStartEvent(EventData):
                session_id: str = session.id
                source: str = source
                satellite_ids: list[str] = field(default_factory=lambda: target_ids)
                volume: float = volume

            await event_manager.trigger("stream_start", StreamStartEvent())

        return session

    async def add_to_stream(
        self,
        stream_id: str,
        satellite: str | list[str],
    ) -> bool:
        """
        Fügt Satellite(s) zu einem laufenden Stream hinzu.

        Args:
            stream_id: Stream-ID.
            satellite: Satellite-ID oder Liste.

        Returns:
            True bei Erfolg.
        """
        session = self._streams.get(stream_id)
        if not session or session.state != StreamState.PLAYING:
            return False

        if isinstance(satellite, str):
            satellite = [satellite]

        for sat_id in satellite:
            session.satellite_ids.add(sat_id)

        # Event für Stream-Update
        event_manager = self._get_event_manager()
        if event_manager:
            from trixy_core.events.event_data.base import EventData

            @dataclass
            class StreamUpdateEvent(EventData):
                session_id: str = stream_id
                added_satellites: list[str] = field(default_factory=lambda: satellite)

            await event_manager.trigger("stream_update", StreamUpdateEvent())

        return True

    async def remove_from_stream(
        self,
        stream_id: str,
        satellite: str | list[str],
    ) -> bool:
        """
        Entfernt Satellite(s) von einem Stream.

        Args:
            stream_id: Stream-ID.
            satellite: Satellite-ID oder Liste.

        Returns:
            True bei Erfolg.
        """
        session = self._streams.get(stream_id)
        if not session:
            return False

        if isinstance(satellite, str):
            satellite = [satellite]

        for sat_id in satellite:
            session.satellite_ids.discard(sat_id)

        # Stream beenden wenn keine Satellites mehr
        if not session.satellite_ids:
            return await self.stop_stream(stream_id)

        return True

    async def stop_stream(self, stream_id: str) -> bool:
        """
        Stoppt einen Stream.

        Args:
            stream_id: Stream-ID.

        Returns:
            True bei Erfolg.
        """
        session = self._streams.pop(stream_id, None)
        if not session:
            return False

        session.state = StreamState.STOPPED

        # Event für Stream-Stop
        event_manager = self._get_event_manager()
        if event_manager:
            from trixy_core.events.event_data.base import EventData

            @dataclass
            class StreamStopEvent(EventData):
                session_id: str = stream_id

            await event_manager.trigger("stream_stop", StreamStopEvent())

        return True

    async def stop_satellite(self, satellite_id: str) -> bool:
        """
        Stoppt alle Streams für einen Satellite.

        Args:
            satellite_id: Satellite-ID.

        Returns:
            True wenn mindestens ein Stream gestoppt.
        """
        stopped = False
        for session in list(self._streams.values()):
            if satellite_id in session.satellite_ids:
                await self.remove_from_stream(session.id, satellite_id)
                stopped = True

        return stopped

    async def stop_all(self) -> int:
        """
        Stoppt alle Streams.

        Returns:
            Anzahl gestoppter Streams.
        """
        count = len(self._streams)
        for stream_id in list(self._streams.keys()):
            await self.stop_stream(stream_id)
        return count

    async def set_volume(
        self,
        satellite: str | None = None,
        volume: float = 1.0,
    ) -> bool:
        """
        Setzt die Lautstärke.

        Args:
            satellite: Satellite-ID (None = alle).
            volume: Lautstärke (0.0-1.0).

        Returns:
            True bei Erfolg.
        """
        # Event für Volume-Change
        event_manager = self._get_event_manager()
        if event_manager:
            from trixy_core.events.event_data.base import EventData

            @dataclass
            class VolumeChangeEvent(EventData):
                satellite_id: str | None = satellite
                volume: float = volume

            await event_manager.trigger("volume_change", VolumeChangeEvent())
            return True

        return False

    def _resolve_targets(
        self,
        satellites: list[str] | None,
        room: str | None,
    ) -> list[str]:
        """
        Ermittelt die Ziel-Satellite-IDs.

        Args:
            satellites: Explizite Liste.
            room: Raum-Filter.

        Returns:
            Liste von Satellite-IDs.
        """
        manager = self._get_satellite_manager()

        if satellites:
            return satellites

        if room:
            return [s.id for s in manager.get_by_room(room) if s.is_connected]

        # Alle verbundenen
        return [s.id for s in manager.get_connected()]


# Convenience-Funktion für schnellen Zugriff
def get_satellite_api(application: "IApplication") -> SatelliteAPI:
    """
    Erstellt oder holt eine SatelliteAPI-Instanz.

    Args:
        application: Die Anwendungsinstanz.

    Returns:
        SatelliteAPI-Instanz.
    """
    # Cache auf Application-Ebene
    if not hasattr(application, "_satellite_api"):
        application._satellite_api = SatelliteAPI(application)
    return application._satellite_api