from contextlib import asynccontextmanager
from fastapi import FastAPI, Request
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse
import traceback

from app.config import get_settings
from app.routers import health, session
from app.services.transcription import get_transcription_service


@asynccontextmanager
async def lifespan(app: FastAPI):
    # Загружаем Whisper модель при старте
    print("Загрузка Whisper модели...")
    service = get_transcription_service()
    service._get_pipeline()
    print("Whisper модель загружена!")
    yield
    # Cleanup при остановке
    print("Остановка сервиса...")


app = FastAPI(
    title="AI Checklist Agent API",
    description="API для AI агента заполнения чеклиста созвона с клиентом",
    version="1.0.0",
    lifespan=lifespan,
    debug=True
)

@app.exception_handler(Exception)
async def global_exception_handler(request: Request, exc: Exception):
    error_detail = f"{type(exc).__name__}: {str(exc)}\n{traceback.format_exc()}"
    print(f"GLOBAL ERROR: {error_detail}")
    return JSONResponse(
        status_code=500,
        content={"detail": error_detail}
    )

# Настройка CORS
settings = get_settings()
origins = settings.allowed_origins.split(",") if settings.allowed_origins != "*" else ["*"]

app.add_middleware(
    CORSMiddleware,
    allow_origins=origins,
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# Подключаем роутеры
app.include_router(health.router)
app.include_router(session.router)


@app.get("/")
async def root():
    return {
        "message": "AI Checklist Agent API",
        "docs": "/docs",
        "health": "/health"
    }