package middleware

import (
	"kpt-tmr-group/pkg/apierr"
	"kpt-tmr-group/pkg/jwt"
	commonPb "kpt-tmr-group/proto/go/backend/common"

	"net/http"
	"strings"

	"github.com/gin-gonic/gin"
)

const (
	Authorization = "Authorization"
	ToKenPrefix   = "Bearer "
	UserName      = "userName"
	XRequestId    = "X-Request-Id"
)

func GetToken(c *gin.Context) string {
	value := c.Request.Header.Get(Authorization)
	if value != "" && strings.HasPrefix(value, ToKenPrefix) {
		return strings.TrimPrefix(value, ToKenPrefix)
	}
	return ""
}

func GetXRequestId(c *gin.Context) string {
	item := c.Request.Header.Get(XRequestId)
	return item
}

func unauthorized(c *gin.Context) {
	c.AbortWithStatusJSON(http.StatusBadRequest, apierr.WithContext(c, commonPb.Error_UNAUTHORIZED))
}

// RequireAdmin ...
func RequireAdmin() gin.HandlerFunc {
	return func(c *gin.Context) {
		token := GetToken(c)
		if token == "" {
			unauthorized(c)
			c.Abort()
		}

		claims, err := jwt.ParseToken(token)
		if err != nil || claims == nil || claims.Username == "" {
			unauthorized(c)
			c.Abort()
		}

		c.Set(UserName, claims.Username)
		c.Set(XRequestId, GetXRequestId(c))
		c.Next()
	}
}