package http

import (
	"context"
	"net/http"

	"hyapp/services/gateway-service/internal/appconfig"
)

// appConfigReader 是 gateway 对后台 App 配置的只读依赖。
type appConfigReader interface {
	ListH5Links(ctx context.Context) ([]appconfig.H5Link, error)
}

// listH5Links 返回后台 APP配置/H5配置 中维护的 H5 入口地址。
func (h *Handler) listH5Links(writer http.ResponseWriter, request *http.Request) {
	if h.appConfigReader == nil {
		// H5 地址来自后台配置表；未注入 reader 时不能返回空假数据。
		writeError(writer, request, http.StatusBadGateway, codeUpstreamError, "upstream service error")
		return
	}

	items, err := h.appConfigReader.ListH5Links(request.Context())
	if err != nil {
		// 配置读取失败属于服务端依赖异常，客户端只需要根据 request_id 排查。
		writeError(writer, request, http.StatusBadGateway, codeUpstreamError, "upstream service error")
		return
	}

	writeOK(writer, request, map[string]any{"items": items, "total": len(items)})
}