package handler

import (
	"net/http"

	"github.com/gin-gonic/gin"

	"github.com/yuxingu/digital-psychology/apps/api/internal/explore"
	"github.com/yuxingu/digital-psychology/apps/api/internal/service/scale"
	"github.com/yuxingu/digital-psychology/apps/api/pkg/response"
)

// ExploreHandler serves the explore catalog.
type ExploreHandler struct {
	Scales *scale.Service
}

// Register mounts explore routes.
func (h *ExploreHandler) Register(rg *gin.RouterGroup) {
	rg.GET("/explore/catalog", h.Catalog)
	rg.GET("/explore/catalog/:key", h.Category)
}

// Catalog handles GET /explore/catalog.
func (h *ExploreHandler) Catalog(c *gin.Context) {
	cats := explore.Catalog()
	if h.Scales != nil {
		if items, err := h.Scales.List(c.Request.Context()); err == nil {
			cats = explore.WithPublishedScales(cats, items)
		}
	}
	response.OK(c, gin.H{"categories": cats})
}

// Category handles GET /explore/catalog/:key.
func (h *ExploreHandler) Category(c *gin.Context) {
	cat := explore.CategoryByKey(c.Param("key"))
	if cat == nil {
		response.Fail(c, http.StatusNotFound, 40402, "category not found")
		return
	}
	if cat.Key == "tests" && h.Scales != nil {
		if items, err := h.Scales.List(c.Request.Context()); err == nil {
			enriched := explore.WithPublishedScales([]explore.Category{*cat}, items)
			if len(enriched) > 0 {
				response.OK(c, enriched[0])
				return
			}
		}
	}
	response.OK(c, cat)
}