from fastapi import FastAPI, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from contextlib import asynccontextmanager
import logging

from .core.config import settings
from .core.logging_config import setup_logging, get_logger
from .core.database import init_db
from .api.account import router as account_router
from .api.database import router as database_router
from .api.task import router as task_router
from .api.comprehensive_data import router as comprehensive_data_router
from .utils.scheduler import task_scheduler

# 初始化日志系统
setup_logging()
logger = get_logger(__name__)

@asynccontextmanager
async def lifespan(app: FastAPI):
    """应用生命周期管理"""
    # 启动时执行
    logger.info("应用启动中...")

    # 初始化数据库
    try:
        init_db()
        logger.info("数据库初始化完成")
    except Exception as e:
        logger.error(f"数据库初始化失败: {e}")

    # 启动定时任务调度器
    try:
        task_scheduler.start()
        logger.info("定时任务调度器启动完成")
    except Exception as e:
        logger.error(f"定时任务调度器启动失败: {e}")

    yield

    # 关闭时执行
    logger.info("应用关闭中...")
    try:
        task_scheduler.shutdown()
        logger.info("定时任务调度器已关闭")
    except Exception as e:
        logger.error(f"定时任务调度器关闭失败: {e}")

# 创建FastAPI应用
app = FastAPI(
    title="铁路项目管理系统",
    description="基于FastAPI、MySQL、SQLAlchemy的铁路项目管理系统",
    version="1.0.0",
    lifespan=lifespan
)

# 配置CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  # 生产环境建议配置具体域名
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

# 注册路由
app.include_router(account_router, prefix="/api")
app.include_router(database_router, prefix="/api")
app.include_router(task_router, prefix="/api")
app.include_router(comprehensive_data_router, prefix="/api")
# app.include_router(test_router, prefix="/api")

# 根路径
@app.get("/")
async def root():
    """根路径"""
    return {
        "message": "铁路项目管理系统 API",
        "version": "1.0.0",
        "docs": "/docs",
        "redoc": "/redoc"
    }

# 健康检查
@app.get("/health")
async def health_check():
    """健康检查"""
    return {
        "status": "healthy",
        "database": "connected",
        "scheduler": "running" if task_scheduler.scheduler.running else "stopped"
    }

# 全局异常处理
@app.exception_handler(Exception)
async def global_exception_handler(request, exc):
    logger.error(f"全局异常: {str(exc)}")
    return HTTPException(
        status_code=500,
        detail="服务器内部错误"
    )