"""rssKeeper - FastAPI 入口"""
import os
from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.staticfiles import StaticFiles
from fastapi.responses import FileResponse
from starlette.middleware.cors import CORSMiddleware
from database import init_db, SessionLocal
from scheduler import init_feed_jobs, stop_scheduler
from routers import feeds, articles, dashboard, external_api
import config


@asynccontextmanager
async def lifespan(app: FastAPI):
    """应用生命周期管理"""
    # 启动时：初始化数据库 + 注册定时任务
    init_db()
    db = SessionLocal()
    try:
        init_feed_jobs(db)
    finally:
        db.close()

    yield

    # 关闭时：停止调度器
    stop_scheduler()


app = FastAPI(
    title="rssKeeper",
    description="RSS 抓取、管理与检索系统",
    version="1.0.0",
    lifespan=lifespan,
)

# CORS — 仅允许同源和开发环境
app.add_middleware(
    CORSMiddleware,
    allow_origins=[
        "http://localhost:7329",
        "http://localhost:7330",
        "http://127.0.0.1:7329",
    ],
    allow_credentials=False,
    allow_methods=["GET", "POST", "PUT", "DELETE"],
    allow_headers=["Content-Type", "Authorization", "X-API-Key"],
)

# API 路由
app.include_router(feeds.router, prefix=config.API_PREFIX)
app.include_router(articles.router, prefix=config.API_PREFIX)
app.include_router(dashboard.router, prefix=config.API_PREFIX)
app.include_router(external_api.router, prefix=config.EXTERNAL_API_PREFIX)


@app.get("/api/health")
def health_check():
    """健康检查"""
    return {"status": "ok", "service": "rssKeeper"}


# 静态文件服务（前端构建产物）
static_dir = os.path.join(config.BASE_DIR, "static")
if os.path.exists(static_dir):
    app.mount("/static", StaticFiles(directory=static_dir), name="static")

    # API 路径白名单 — 这些路径不应被 SPA 兜底
    _API_PATHS = {
        "api", "docs", "openapi.json", "redoc",
    }

    @app.get("/{full_path:path}")
    async def serve_spa(full_path: str):
        """Vue SPA 路由回退"""
        # API/文档路由不走 SPA 兜底
        first_seg = full_path.split("/")[0] if full_path else ""
        if first_seg in _API_PATHS:
            return {"detail": "Not found"}

        index_path = os.path.join(static_dir, "index.html")
        if os.path.exists(index_path):
            return FileResponse(index_path)
        return {"detail": "Frontend not built"}