package middleware

import (
	"net/http"

	"github.com/gogf/gf/v2/errors/gerror"
	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/net/ghttp"

	"easygoadmin/internal/consts"
	"easygoadmin/utility/response"
)

// ============================== 演示模式中间件 ==============================

// Demo 演示模式拦截
//
// 当配置 app.demo 为 true 时启用，规则如下：
//   - 读操作（GET/HEAD/OPTIONS）放行，演示站可正常浏览
//   - 写操作（POST/PUT/PATCH/DELETE）一律拒绝并提示"演示环境，禁止操作!"
//   - 公开白名单路径（登录/注册/验证码/令牌兑换）放行，保证演示站可登录
func Demo(r *ghttp.Request) {
	if !g.Cfg().MustGet(r.Context(), "app.demo").Bool() {
		r.Middleware.Next()
		return
	}
	switch r.Method {
	case http.MethodGet, http.MethodHead, http.MethodOptions:
		r.Middleware.Next()
		return
	}
	if IsPublicPath(r.URL.Path) {
		r.Middleware.Next()
		return
	}
	response.Write(r, response.Fail(gerror.NewCode(consts.CodeDemoMode)))
}