import asyncio
import os
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import FileResponse, JSONResponse
from contextlib import asynccontextmanager
from dotenv import load_dotenv

from database import init_db
from routes import stock, collections, shares, themes, core_stocks, fuyao, market_dashboard
from services.daily_collector import collector_loop, cache_cleanup_loop

load_dotenv()


@asynccontextmanager
async def lifespan(app: FastAPI):
    init_db()
    collector_task = asyncio.create_task(collector_loop())
    cache_cleanup_task = asyncio.create_task(cache_cleanup_loop())
    try:
        yield
    finally:
        for t in (collector_task, cache_cleanup_task):
            t.cancel()
        for t in (collector_task, cache_cleanup_task):
            try:
                await t
            except asyncio.CancelledError:
                pass


app = FastAPI(title="AUV API", version="1.0.0", lifespan=lifespan)

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

app.include_router(stock.router, prefix="/api/stock")
app.include_router(collections.router, prefix="/api/collections")
app.include_router(shares.router, prefix="/api/share")
app.include_router(themes.router, prefix="/api/themes")
app.include_router(core_stocks.router, prefix="/api/core-stocks")
app.include_router(fuyao.router, prefix="/api/v2")
app.include_router(market_dashboard.router, prefix="/api")

# 生产模式：后端同时托管前端静态文件
# catch-all 路由在 API 路由之后注册，所以 API 优先级更高
dist_path = os.path.join(os.path.dirname(__file__), "dist")

# HTML 不缓存：保证 index.html 永远最新（引用的资源文件名带 hash，可长缓存）
_NO_CACHE_HTML = {"Cache-Control": "no-cache, no-store, must-revalidate"}

if os.path.isdir(dist_path):
    @app.get("/{full_path:path}")
    async def serve_spa(full_path: str):
        file_path = os.path.join(dist_path, full_path) if full_path else os.path.join(dist_path, "index.html")
        if os.path.isfile(file_path):
            # 静态资源（带 hash 的文件名）可缓存；HTML 不缓存
            if file_path.endswith(".html"):
                return FileResponse(file_path, headers=_NO_CACHE_HTML)
            return FileResponse(file_path)
        # SPA fallback: 非文件路径统一返回 index.html
        index_path = os.path.join(dist_path, "index.html")
        if os.path.isfile(index_path):
            return FileResponse(index_path, media_type="text/html", headers=_NO_CACHE_HTML)
        return JSONResponse({"detail": "Not Found"}, status_code=404)