package middleware

import (
	"hr_receiver/util"
	"net/http"
	"strings"

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

func JWTAuth() gin.HandlerFunc {
	return func(c *gin.Context) {
		authHeader := c.GetHeader("Authorization")
		if authHeader == "" {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header required"})
			c.Abort()
			return
		}

		// Bearer Token格式
		parts := strings.SplitN(authHeader, " ", 2)
		if !(len(parts) == 2 && parts[0] == "Bearer") {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Authorization header format must be Bearer {token}"})
			c.Abort()
			return
		}

		// 解析Token
		claims, err := util.ParseToken(parts[1])
		if err != nil {
			c.JSON(http.StatusUnauthorized, gin.H{"error": "Invalid or expired token"})
			c.Abort()
			return
		}

		// 将用户信息存入上下文
		c.Set("userID", claims.UserID)
		c.Set("username", claims.Username)

		c.Next()
	}
}