package middleware

import (
	"net/http"
	"strings"
	
	"github.com/gin-gonic/gin"
	
	"newaterobot-process/service"
)

// JWTAuthMiddleware JWT认证中间件
func JWTAuthMiddleware() gin.HandlerFunc {
	return func(c *gin.Context) {
		// 获取token
		authHeader := c.GetHeader("Authorization")
		if authHeader == "" {
			c.JSON(http.StatusUnauthorized, gin.H{
				"code": 401,
				"message": "请求未携带token，无权限访问",
			})
			c.Abort()
			return
		}

		// 按空格分割
		parts := strings.SplitN(authHeader, " ", 2)
		if !(len(parts) == 2 && parts[0] == "Bearer") {
			c.JSON(http.StatusUnauthorized, gin.H{
				"code": 401,
				"message": "请求头中auth格式有误",
			})
			c.Abort()
			return
		}

		// 解析token
		claims, err := service.GetJWTService().ParseToken(parts[1])
		if err != nil {
			c.JSON(http.StatusUnauthorized, gin.H{
				"code": 401,
				"message": "token无效或已过期",
			})
			c.Abort()
			return
		}

		// 将用户信息保存到上下文
		c.Set("user_id", claims.UserID)
		c.Set("username", claims.Username)
		c.Next()
	}
}