<?php

namespace App\Http\Controllers\Shop;

use App\Http\Controllers\Controller;
use App\Models\Product;

class FavoriteController extends Controller
{
    public function index()
    {
        $favoriteIds = $this->favoriteIds();
        $position = array_flip($favoriteIds);

        $products = Product::query()
            ->whereIn('id', $favoriteIds)
            ->where('is_active', true)
            ->with('category')
            ->get()
            ->sortBy(fn (Product $product) => $position[$product->id] ?? PHP_INT_MAX)
            ->values();

        return view('shop.favorites', [
            'products' => $products,
        ]);
    }

    public function toggle(Product $product)
    {
        $favorites = $this->favoriteIds();
        $exists = in_array($product->id, $favorites, true);

        if ($exists) {
            $favorites = array_values(array_filter($favorites, fn (int $id) => $id !== $product->id));
            session()->put('favorites', $favorites);

            return back()->with('status', "Товар \"{$product->name}\" удален из избранного.");
        }

        $favorites[] = $product->id;
        session()->put('favorites', array_values(array_unique($favorites)));

        return back()->with('status', "Товар \"{$product->name}\" добавлен в избранное.");
    }

    private function favoriteIds(): array
    {
        return array_values(array_map('intval', (array) session()->get('favorites', [])));
    }
}