"""FastAPI 应用工厂。"""
from __future__ import annotations

import logging
from collections.abc import AsyncIterator
from contextlib import asynccontextmanager

from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware

from src.core.config import settings


@asynccontextmanager
async def lifespan(app: FastAPI) -> AsyncIterator[None]:
    from src.db.base import init_db
    from src.core.http_client import close_client
    await init_db()  # 验证连接,不建表
    yield
    await close_client()


def create_app() -> FastAPI:
    app = FastAPI(
        title="Profeto API",
        description="足球数据 + LLM 预测服务",
        version="0.1.0",
        lifespan=lifespan,
    )

    origins = [o.strip() for o in settings.CORS_ORIGINS.split(",") if o.strip()]
    methods = [m.strip() for m in settings.CORS_METHODS.split(",") if m.strip()]
    headers = [h.strip() for h in settings.CORS_HEADERS.split(",") if h.strip()]
    app.add_middleware(
        CORSMiddleware,
        allow_origins=origins,
        allow_credentials=True,
        allow_methods=methods,
        allow_headers=headers,
    )

    from src.api.routes.matches import router as matches_router
    from src.api.routes.predict import router as predict_router
    from src.api.routes.ingest import router as ingest_router
    from src.api.routes.eval import router as eval_router
    from src.api.routes.backtest import router as backtest_router

    app.include_router(matches_router)
    app.include_router(predict_router)
    app.include_router(ingest_router)
    app.include_router(eval_router)
    app.include_router(backtest_router)

    @app.get("/health")
    async def health():
        return {"status": "healthy", "service": "profeto"}


    @app.get("/health/ready")
    async def health_ready():
        """就绪检查: 验证数据库连接。"""
        from src.db.base import engine
        try:
            async with engine.begin() as conn:
                await conn.run_sync(lambda conn: None)
            return {"status": "ready"}
        except Exception:
            return {"status": "not_ready"}

    return app


app = create_app()