"""FastAPI 入口。

通过 `uvicorn app.main:app --reload` 启动。
"""
from __future__ import annotations

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

from pathlib import Path

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

from app.api.v1.ad import router as ad_router
from app.api.v1.auth import router as auth_router
from app.api.v1.compare import router as compare_router
from app.api.v1.coupon import router as coupon_router
from app.api.v1.feedback import router as feedback_router
from app.api.v1.meituan import router as meituan_router
from app.api.v1.savings import router as savings_router
from app.api.v1.signin import router as signin_router
from app.api.v1.tasks import router as tasks_router
from app.api.v1.user import router as user_router
from app.api.v1.wallet import router as wallet_router
from app.core.config import settings
from app.core.logging import setup_logging

setup_logging(debug=settings.APP_DEBUG)
logger = logging.getLogger("shagua.main")


@asynccontextmanager
async def lifespan(_: FastAPI) -> AsyncIterator[None]:
    # 提示而非强制建表:生产用 alembic upgrade head,本地 dev 也建议先跑一次 migration。
    # 这里只 log,不自动 create_all,避免生产环境意外建出过时 schema。
    logger.info(
        "started env=%s debug=%s db=%s",
        settings.APP_ENV,
        settings.APP_DEBUG,
        settings.DATABASE_URL.split("://", 1)[0],
    )
    yield
    logger.info("shutting down")


app = FastAPI(
    title=settings.APP_NAME,
    version="0.1.0",
    docs_url="/docs" if not settings.is_prod else None,
    redoc_url="/redoc" if not settings.is_prod else None,
    lifespan=lifespan,
)

if settings.cors_origins_list:
    app.add_middleware(
        CORSMiddleware,
        allow_origins=settings.cors_origins_list,
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )


@app.get("/health", tags=["meta"])
def health() -> dict[str, str]:
    return {"status": "ok"}


app.include_router(auth_router)
app.include_router(user_router)
app.include_router(feedback_router)
app.include_router(coupon_router)
app.include_router(compare_router)
app.include_router(meituan_router)
app.include_router(wallet_router)
app.include_router(signin_router)
app.include_router(tasks_router)
app.include_router(savings_router)
app.include_router(ad_router)

# 用户上传文件(头像)静态服务。生产可改由 nginx 直接 serve MEDIA_ROOT。
_media_root = Path(settings.MEDIA_ROOT)
_media_root.mkdir(parents=True, exist_ok=True)
app.mount(
    settings.MEDIA_URL_PREFIX,
    StaticFiles(directory=str(_media_root)),
    name="media",
)