package middleware

import (
	"ankao/internal/database"
	"ankao/internal/models"
	"net/http"
	"strings"

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

// Auth 认证中间件
func Auth() gin.HandlerFunc {
	return func(c *gin.Context) {
		// 从请求头获取token
		authHeader := c.GetHeader("Authorization")
		if authHeader == "" {
			c.JSON(http.StatusUnauthorized, gin.H{
				"success": false,
				"message": "未登录",
			})
			c.Abort()
			return
		}

		// 解析Bearer token
		parts := strings.SplitN(authHeader, " ", 2)
		if len(parts) != 2 || parts[0] != "Bearer" {
			c.JSON(http.StatusUnauthorized, gin.H{
				"success": false,
				"message": "token格式错误",
			})
			c.Abort()
			return
		}

		token := parts[1]

		// 从数据库查找token对应的用户
		db := database.GetDB()
		var user models.User
		if err := db.Where("token = ?", token).First(&user).Error; err != nil {
			c.JSON(http.StatusUnauthorized, gin.H{
				"success": false,
				"message": "token无效或已过期",
			})
			c.Abort()
			return
		}

		// 将用户ID设置到上下文
		c.Set("user_id", user.ID)
		c.Set("username", user.Username)

		c.Next()
	}
}