package middleware

import (
	"time"

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

// CorsMiddleware 处理跨域请求
// 允许 Vue 等前端分离架构在开发和生产环境下访问后端 API
func CorsMiddleware() gin.HandlerFunc {
	return cors.New(cors.Config{
		AllowOriginFunc:  func(origin string) bool { return true }, // 允许所有来源
		AllowMethods:     []string{"GET", "POST", "PUT", "PATCH", "DELETE", "HEAD", "OPTIONS"},
		AllowHeaders:     []string{"Origin", "Content-Length", "Content-Type", "Authorization", "X-CSRF-Token", "Accept"},
		ExposeHeaders:    []string{"Content-Length"},
		AllowCredentials: true,
		MaxAge:           12 * time.Hour,
	})
}