package middlewares

import (
	"case-admin-api/consts"
	"case-admin-api/global"
	"case-admin-api/utils"
	"github.com/gin-gonic/gin"
	"net/http"
	"strconv"
	"strings"
)

// Jwt jwt认证
func Jwt() gin.HandlerFunc {
	return func(c *gin.Context) {
		authorization := c.Request.Header.Get("Authorization")
		if authorization == "" || !strings.HasPrefix(authorization, "Bearer ") {
			c.JSON(http.StatusUnauthorized, gin.H{
				"message": "请求未授权",
				"code":    consts.TokenError,
				"data":    "",
			})
			c.Abort()
			return
		}

		// 去除Bearer
		authorization = authorization[7:] // 截取字符

		// 检测是否存在黑名单
		res, _ := global.Redis.Get(c, "jwt_black_"+authorization).Result()
		if res != "" {
			c.JSON(http.StatusOK, gin.H{
				"message": "token错误/过期",
				"code":    consts.TokenError,
				"data":    "",
			})

			c.Abort()
			return
		}

		// 解析jwt
		t, err := utils.ParseJwt(authorization)
		if err != nil {
			c.JSON(http.StatusOK, gin.H{
				"message": "token错误/过期",
				"code":    consts.TokenError,
				"data":    "",
			})

			c.Abort()
			return
		}

		// 转换类型
		userId, err := strconv.ParseInt(t.UserId, 10, 64)
		if err != nil {
			c.JSON(http.StatusOK, gin.H{
				"message": "token错误",
				"code":    consts.TokenError,
				"data":    "",
			})

			c.Abort()
			return
		}

		c.Set("AdminUserId", userId) // 用户id
		c.Next()
	}
}