"""
JH Photomaton — Interface de gestion
Raspberry Pi 4 / Les Sapins Du Web (LSDW)

Remplace Node-RED pour :
  - Contrôle bouton GPIO23 (multi-clic + long press) + relay GPIO12
  - LEDs WS2812b GPIO18 (35 LEDs) — effets selon état
  - Galerie publique et galerie admin
  - File d'attente d'impression (SQLite)
  - Dashboard admin avec monitoring système

Port : 8090 (configurable dans config/settings.yaml)
"""

import asyncio
import logging
from contextlib import asynccontextmanager
from pathlib import Path

from fastapi import FastAPI, WebSocket, WebSocketDisconnect
from fastapi.staticfiles import StaticFiles
from starlette.middleware.sessions import SessionMiddleware

from backend.services.config_service import ConfigService
from backend.services.led_service import LEDService
from backend.services.button_service import ButtonService
from backend.services.photobooth_service import PhotoboothService
from backend.services.printer_service import PrinterService
from backend.services.system_service import SystemService
from backend.utils.ws_manager import WSManager
from backend.api import (
    gallery,
    admin_api,
    admin_gallery_api,
    leds_api,
    system_api,
    print_api,
    actions_api,
    webhooks,
)

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
)
logger = logging.getLogger(__name__)

BASE_DIR = Path(__file__).parent


@asynccontextmanager
async def lifespan(app: FastAPI):
    # ── Chargement config ───────────────────────────────────────────────────
    config_svc = ConfigService(BASE_DIR / "config" / "settings.yaml")
    config = config_svc.load()

    # ── Services ────────────────────────────────────────────────────────────
    ws_manager = WSManager()
    photobooth_svc = PhotoboothService(config)
    system_svc = SystemService()
    printer_svc = PrinterService(config)

    await printer_svc.init_db(BASE_DIR / "data" / "print_queue.db")

    # LEDs
    led_svc = LEDService(config)
    led_svc.start()

    # Bouton GPIO — passe le loop asyncio pour les callbacks
    loop = asyncio.get_event_loop()
    led_svc.set_loop(loop)
    led_svc.set_on_change(ws_manager.broadcast)

    button_svc = ButtonService(config, led_svc, photobooth_svc, ws_manager, loop)
    button_svc.start()

    # ── État partagé dans l'app ──────────────────────────────────────────────
    app.state.config = config
    app.state.config_service = config_svc
    app.state.ws_manager = ws_manager
    app.state.led_service = led_svc
    app.state.button_service = button_svc
    app.state.photobooth_service = photobooth_svc
    app.state.printer_service = printer_svc
    app.state.system_service = system_svc

    # ── Tâche de fond : broadcast stats système ──────────────────────────────
    stats_task = asyncio.create_task(_system_stats_loop(system_svc, ws_manager))

    logger.info("JH Photomaton démarré — port %d", config.app.port)
    led_svc.play("idle")

    yield  # ← l'app tourne ici

    # ── Arrêt propre ─────────────────────────────────────────────────────────
    stats_task.cancel()
    button_svc.stop()
    led_svc.stop()
    await photobooth_svc.close()
    await printer_svc.close()
    logger.info("JH Photomaton arrêté")


async def _system_stats_loop(sys_svc: SystemService, ws: WSManager):
    """Broadcast des stats système toutes les 5 secondes."""
    while True:
        try:
            stats = sys_svc.get_stats()
            await ws.broadcast({"type": "system_stats", "data": stats})
        except Exception as e:
            logger.debug("Stats loop: %s", e)
        await asyncio.sleep(5)


# ── Application FastAPI ──────────────────────────────────────────────────────

app = FastAPI(
    title="JH Photomaton",
    description="Interface de gestion du photomaton — Les Sapins Du Web",
    version="1.0.0",
    lifespan=lifespan,
)

app.add_middleware(
    SessionMiddleware,
    secret_key="jh-photomaton-session-2026",  # remplacé par config au démarrage
    max_age=86400,  # 24h
)

# Fichiers statiques
app.mount(
    "/static",
    StaticFiles(directory=BASE_DIR / "frontend" / "static"),
    name="static",
)

# Routes
app.include_router(gallery.router)
app.include_router(admin_api.router)
app.include_router(admin_gallery_api.router)
app.include_router(leds_api.router, prefix="/api")
app.include_router(system_api.router, prefix="/api")
app.include_router(print_api.router, prefix="/api")
app.include_router(actions_api.router, prefix="/api")
app.include_router(webhooks.router, prefix="/api")


# ── WebSocket ────────────────────────────────────────────────────────────────

@app.websocket("/ws")
async def websocket_endpoint(websocket: WebSocket):
    ws_manager: WSManager = websocket.app.state.ws_manager
    await ws_manager.connect(websocket)

    # Envoie l'état initial à la connexion
    try:
        led = websocket.app.state.led_service
        sys_svc = websocket.app.state.system_service
        await ws_manager.send(websocket, {"type": "connected", "led_effect": led.current_effect})
        await ws_manager.send(websocket, {"type": "system_stats", "data": sys_svc.get_stats()})
    except Exception:
        pass

    try:
        while True:
            data = await websocket.receive_text()
            # Commandes entrantes du client (optionnel)
            import json
            try:
                msg = json.loads(data)
                if msg.get("type") == "ping":
                    await ws_manager.send(websocket, {"type": "pong"})
            except Exception:
                pass
    except WebSocketDisconnect:
        ws_manager.disconnect(websocket)


# ── Point d'entrée ───────────────────────────────────────────────────────────

if __name__ == "__main__":
    import uvicorn
    cfg = ConfigService(BASE_DIR / "config" / "settings.yaml").load()
    uvicorn.run(
        "main:app",
        host=cfg.app.host,
        port=cfg.app.port,
        reload=cfg.app.debug,
        log_level="info",
    )