from contextlib import asynccontextmanager

from fastapi import FastAPI

from app.core.exceptions import (
    AIServiceError,
    ai_service_exception_handler,
    unhandled_exception_handler,
)
from app.core.logging import RequestLoggingMiddleware, get_logger

logger = get_logger(__name__)


@asynccontextmanager
async def lifespan(app: FastAPI):
    logger.info("startup", extra={"message": "AI service starting"})
    yield
    logger.info("shutdown", extra={"message": "AI service stopping"})


app = FastAPI(
    title="Label AI Service",
    description="知识图谱标注平台 AI 计算服务",
    version="1.0.0",
    lifespan=lifespan,
)

app.add_middleware(RequestLoggingMiddleware)
app.add_exception_handler(AIServiceError, ai_service_exception_handler)
app.add_exception_handler(Exception, unhandled_exception_handler)


@app.get("/health", tags=["Health"])
async def health():
    return {"status": "ok"}


# Routers registered after implementation (imported lazily to avoid circular deps)
from app.routers import text, image, video, qa, finetune  # noqa: E402

app.include_router(text.router, prefix="/api/v1")
app.include_router(image.router, prefix="/api/v1")
app.include_router(video.router, prefix="/api/v1")
app.include_router(qa.router, prefix="/api/v1")
app.include_router(finetune.router, prefix="/api/v1")