"""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 PersistentErrorLogHandler, 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, catalysts

def configure_logging() -> None:
    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",
    )

    # 保留应用日志的调试能力，但压制基础设施层的噪音。
    noisy_loggers = {
        "aiosqlite": logging.WARNING,
        "sqlalchemy": logging.WARNING,
        "sqlalchemy.engine": logging.WARNING,
        "sqlalchemy.pool": logging.WARNING,
        "httpx": logging.INFO,
        "httpcore": logging.WARNING,
        "uvicorn.access": logging.INFO,
    }
    for name, level in noisy_loggers.items():
        logging.getLogger(name).setLevel(level)

    app_logger = logging.getLogger("app")
    if not any(isinstance(handler, PersistentErrorLogHandler) for handler in app_logger.handlers):
        app_logger.addHandler(PersistentErrorLogHandler(level=logging.ERROR))


configure_logging()
logger = logging.getLogger(__name__)


async def ensure_admin_exists():
    """确保配置中的管理员账号存在并可用。"""
    from sqlalchemy import select, insert, update
    from app.db.database import get_db
    from app.db.tables import users_table, invite_codes_table
    from app.core.auth import hash_password

    async with get_db() as db:
        configured_admin = await db.execute(
            select(users_table).where(users_table.c.email == settings.admin_email)
        )
        admin_row = configured_admin.mappings().first()

        if admin_row is None:
            await db.execute(
                insert(users_table).values(
                    username=settings.admin_username,
                    email=settings.admin_email,
                    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_email}' 已创建")
        elif admin_row["role"] != "admin" or not admin_row["is_active"]:
            await db.execute(
                update(users_table)
                .where(users_table.c.id == admin_row["id"])
                .values(
                    role="admin",
                    is_active=True,
                )
            )
            await db.commit()
            logger.info("默认管理员用户 '%s' 已修正为可用管理员", settings.admin_email)

        invite = await db.execute(
            select(invite_codes_table).where(invite_codes_table.c.code == "ASTOCK-ACCESS")
        )
        if invite.first() is None:
            await db.execute(
                insert(invite_codes_table).values(
                    code="ASTOCK-ACCESS",
                    description="默认注册邀请码",
                    is_active=True,
                    max_uses=999999,
                    used_count=0,
                )
            )
            await db.commit()


@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()
        from app.llm.strategy_config import ensure_default_configs
        await ensure_default_configs()
        logger.info("策略配置中心初始化完成")
        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", extra={"skip_error_persist": True})
        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)
app.include_router(catalysts.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, extra={"skip_error_persist": True})
    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),
    }