Back-end/app/main.py

# app/main.py
from fastapi import FastAPI, UploadFile, File, WebSocket, WebSocketDisconnect
from fastapi.middleware.cors import CORSMiddleware
from services import stt_service, tts_service, llm_service, live_stream_service # type: ignore
import uvicorn

app = FastAPI(
    title="Holokia Avatar Backend",
    description="Backend pour avatar 3D interactif avec STT, TTS, LLM et LiveKit streaming",
    version="1.0.0"
)

# ✅ Activer CORS pour éviter les blocages côté front
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  # ⚠️ En prod, mettre le domaine du front
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# 🩺 Health check
@app.get("/health")
async def health():
    return {"status": "ok", "message": "Backend operational"}

# 🎤 STT - Audio → Texte
@app.post("/stt/transcribe")
async def transcribe_audio(file: UploadFile = File(...)):
    try:
        result = await stt_service.transcribe_audio(file)
        return {"text": result}
    except Exception as e:
        return {"error": str(e)}

# 🗣 TTS - Texte → Audio
@app.post("/tts/generate")
async def generate_tts(text: str):
    try:
        audio_path = await tts_service.text_to_speech(text)
        return {"audio_file": audio_path}
    except Exception as e:
        return {"error": str(e)}

# 🤖 LLM - Prompt → Texte
@app.post("/llm/generate")
async def generate_llm(prompt: str):
    try:
        response = await llm_service.generate_response(prompt)
        return {"response": response}
    except Exception as e:
        return {"error": str(e)}

# 📡 Live streaming WebSocket
@app.websocket("/live-stream")
async def websocket_endpoint(websocket: WebSocket):
    await websocket.accept()
    try:
        await live_stream_service.handle_connection(websocket)
    except WebSocketDisconnect:
        print("🔌 Client déconnecté du live stream")
    except Exception as e:
        print(f"❌ Erreur WebSocket : {e}")
    finally:
        await websocket.close()

# 🚀 Point d'entrée
if __name__ == "__main__":
    uvicorn.run("app.main:app", host="0.0.0.0", port=8000, reload=True)