package middleware

import (
	"net/http"
	"strings"
	"task-track-backend/pkg/auth"

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

func AuthMiddleware() gin.HandlerFunc {
	return func(c *gin.Context) {
		// 获取 Authorization header
		authHeader := c.GetHeader("Authorization")
		if authHeader == "" {
			c.JSON(http.StatusUnauthorized, gin.H{
				"code":    401,
				"message": "Authorization header is required",
			})
			c.Abort()
			return
		}

		// 验证 Bearer token 格式
		parts := strings.SplitN(authHeader, " ", 2)
		if !(len(parts) == 2 && parts[0] == "Bearer") {
			c.JSON(http.StatusUnauthorized, gin.H{
				"code":    401,
				"message": "Authorization header format must be Bearer {token}",
			})
			c.Abort()
			return
		}

		token := parts[1]

		// 验证 JWT token
		claims, err := auth.ValidateToken(token)
		if err != nil {
			c.JSON(http.StatusUnauthorized, gin.H{
				"code":    401,
				"message": "Invalid token",
			})
			c.Abort()
			return
		}

		// 将用户信息存储到上下文中
		c.Set("user_id", claims.UserID)
		c.Set("username", claims.Username)
		c.Set("organization_id", claims.OrganizationID)

		c.Next()
	}
}