"""
认证中间件
"""
import logging
from typing import Optional

from fastapi import Request, HTTPException, status
from fastapi.responses import JSONResponse
from starlette.middleware.base import BaseHTTPMiddleware

from app.config import settings
from app.services.auth_service import decode_token

logger = logging.getLogger(__name__)


class AuthMiddleware(BaseHTTPMiddleware):
    """JWT 认证中间件"""
    
    async def dispatch(self, request: Request, call_next):
        # 跳过认证的路径
        skip_paths = [
            "/",
            "/health",
            "/docs",
            "/redoc",
            "/openapi.json",
            f"{settings.API_PREFIX}/auth/login",
        ]
        
        # 检查是否需要跳过认证
        if any(request.url.path.startswith(path) for path in skip_paths):
            return await call_next(request)
        
        # 获取 Authorization header
        auth_header: Optional[str] = request.headers.get("Authorization")
        
        if not auth_header:
            # 对于需要认证的 API，如果没有 token，继续处理但标记为未认证
            # 具体的权限检查在各个路由中进行
            return await call_next(request)
        
        # 验证 token
        try:
            if auth_header.startswith("Bearer "):
                token = auth_header[7:]
                payload = decode_token(token)
                
                if payload:
                    # 将用户信息添加到 request state
                    request.state.user_id = payload.get("user_id")
                    request.state.username = payload.get("sub")
                    request.state.token_payload = payload
        except Exception as e:
            logger.warning(f"Token validation failed: {e}")
        
        return await call_next(request)