"""
AI虚拟用户新闻互动系统 - 后端主入口
"""
import asyncio
from contextlib import asynccontextmanager
from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from fastapi.responses import JSONResponse

from app.core.config import settings
from app.core.database import init_db
from app.core.logger import logger
from app.api import router
from app.services.scheduler import scheduler_service


@asynccontextmanager
async def lifespan(app: FastAPI):
    """应用生命周期管理"""
    logger.info("🚀 AI虚拟用户新闻互动系统启动中...")
    # 初始化数据库
    await init_db()
    # 启动调度器
    await scheduler_service.start()
    logger.info("✅ 系统启动完成")
    yield
    # 关闭调度器
    await scheduler_service.stop()
    logger.info("🛑 系统已关闭")


app = FastAPI(
    title="AI虚拟用户新闻互动系统",
    description="基于AI驱动的虚拟用户新闻互动自动化平台",
    version="1.0.0",
    lifespan=lifespan,
    docs_url="/api/docs",
    redoc_url="/api/redoc",
)

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

# 注册路由
app.include_router(router, prefix="/api")


@app.get("/health")
async def health_check():
    return {"status": "ok", "service": "ai-virtual-news-backend"}


@app.exception_handler(Exception)
async def global_exception_handler(request, exc):
    logger.error(f"全局异常: {exc}")
    return JSONResponse(
        status_code=500,
        content={"code": 500, "message": f"服务器内部错误: {str(exc)}"},
    )