"""A 股分析推荐 Agent - FastAPI 入口"""

import logging
import traceback
from contextlib import asynccontextmanager
from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse
from fastapi.middleware.cors import CORSMiddleware

from app.config import settings
from app.db.error_logger import log_error
from app.db.database import init_db
from app.engine.scheduler import start_scheduler, stop_scheduler
from app.api import market, sectors, recommendations, stocks, watchlists, websocket, chat, auth, debug

logging.basicConfig(
    level=logging.DEBUG if settings.debug else logging.INFO,
    format="%(asctime)s [%(levelname)s] %(name)s: %(message)s",
    datefmt="%Y-%m-%d %H:%M:%S",
)
logger = logging.getLogger(__name__)


async def ensure_admin_exists():
    """如果没有管理员用户，自动创建默认管理员"""
    from sqlalchemy import select, insert
    from app.db.database import get_db
    from app.db.tables import users_table
    from app.core.auth import hash_password

    async with get_db() as db:
        result = await db.execute(
            select(users_table).where(users_table.c.role == "admin")
        )
        if result.first() is None:
            await db.execute(
                insert(users_table).values(
                    username=settings.admin_username,
                    password_hash=hash_password(settings.admin_password),
                    role="admin",
                    is_active=True,
                )
            )
            await db.commit()
            logger.info(f"默认管理员用户 '{settings.admin_username}' 已创建")


@asynccontextmanager
async def lifespan(app: FastAPI):
    # 启动
    logger.info("A 股分析推荐 Agent 启动中...")
    try:
        await init_db()
        logger.info("数据库初始化完成")
        await ensure_admin_exists()
        start_scheduler()
        logger.info("调度器已启动")
        yield
    except Exception as e:
        logger.exception("应用生命周期异常")
        await log_error(
            "lifespan",
            f"应用生命周期异常: {e}",
            detail=traceback.format_exc(),
            level="critical",
        )
        raise
    finally:
        stop_scheduler()
        logger.info("服务已关闭")


app = FastAPI(
    title="A 股分析推荐 Agent",
    description="基于资金驱动的四层漏斗模型，盘中实时分析推荐 A 股",
    version="1.0.0",
    lifespan=lifespan,
)

# CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=[settings.frontend_url, "http://localhost:3002"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# 路由
app.include_router(market.router)
app.include_router(sectors.router)
app.include_router(recommendations.router)
app.include_router(stocks.router)
app.include_router(watchlists.router)
app.include_router(chat.router)
app.include_router(auth.router)
app.include_router(debug.router)

# WebSocket
app.websocket("/ws")(websocket.ws_endpoint)


@app.exception_handler(Exception)
async def unhandled_exception_handler(request: Request, exc: Exception):
    logger.exception("未处理的接口异常: %s %s", request.method, request.url.path)
    query = str(request.url.query or "")
    await log_error(
        "asgi",
        f"未处理的接口异常: {exc}",
        detail=traceback.format_exc(),
        level="error",
        context={
            "method": request.method,
            "path": request.url.path,
            "query": query,
        },
    )
    return JSONResponse(
        status_code=500,
        content={"detail": "服务器内部错误"},
    )


@app.get("/api/health")
async def health():
    return {
        "status": "ok",
        "service": "astock-agent",
        "llm_enabled": bool(settings.deepseek_api_key),
    }