package handler

import (
	"lyra/internal/api"
	"lyra/internal/httpx"
	"lyra/internal/model"
	"net/http"

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

type TestHandler struct {
	categoryModel model.CategoryModel
}

func NewTestHandler(categoryModel model.CategoryModel) *TestHandler {
	return &TestHandler{categoryModel: categoryModel}
}

func (h *TestHandler) Hello() gin.HandlerFunc {
	return func(c *gin.Context) {
		categories, err := h.categoryModel.FindAll(c.Request.Context())
		if err != nil {
			httpx.Fail(c, http.StatusInternalServerError, api.CodeInternalError, "获取分类列表失败")
			return
		}
		httpx.OK(c, toCategoryResponses(categories))
	}
}

// toCategoryResponses 显式把内部模型转换为响应 DTO；make 保证空结果输出 data:[] 而非 null。
func toCategoryResponses(categories []*model.Category) []api.CategoryResponse {
	responses := make([]api.CategoryResponse, 0, len(categories))
	for _, category := range categories {
		responses = append(responses, api.CategoryResponse{
			ID:    category.ID,
			Slug:  category.Slug,
			Title: category.Title,
			Sort:  category.Sort,
		})
	}
	return responses
}