package handlers

import (
	"html/template"
	"log"
	"net/http"

	"shop/internal/models"
	"shop/internal/repository"
)

type HomeHandler struct {
	products  *repository.ProductRepository
	templates *template.Template
}

func NewHomeHandler(products *repository.ProductRepository, templates *template.Template) *HomeHandler {
	return &HomeHandler{products: products, templates: templates}
}

type homePageData struct {
	Title      string
	Products   []models.Product
	Categories []string
	TotalItems int
}

func (h *HomeHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
	if r.URL.Path != "/" {
		http.NotFound(w, r)
		return
	}

	ctx := r.Context()
	featured, err := h.products.Featured(ctx, 8)
	if err != nil {
		log.Printf("featured products: %v", err)
		http.Error(w, "Ошибка загрузки каталога", http.StatusInternalServerError)
		return
	}

	categories, err := h.products.Categories(ctx)
	if err != nil {
		log.Printf("categories: %v", err)
		categories = nil
	}

	total, err := h.products.Count(ctx)
	if err != nil {
		log.Printf("count: %v", err)
		total = 0
	}

	data := homePageData{
		Title:      "Главная",
		Products:   featured,
		Categories: categories,
		TotalItems: total,
	}

	w.Header().Set("Content-Type", "text/html; charset=utf-8")
	if err := h.templates.ExecuteTemplate(w, "home.html", data); err != nil {
		log.Printf("render home: %v", err)
	}
}

func Health(w http.ResponseWriter, r *http.Request) {
	w.Header().Set("Content-Type", "application/json")
	w.Write([]byte(`{"status":"ok"}`))
}