@extends('layouts.shop')

@php
    $productGallery = $product->gallery_urls;
    $productImage = $productGallery[0] ?? ($product->image_url ?: config('seo.default_image'));
    $productImageUrl = str_starts_with($productImage, 'http://') || str_starts_with($productImage, 'https://')
        ? $productImage
        : url($productImage);
    $productSchemaImages = array_map(
        fn (string $image) => str_starts_with($image, 'http://') || str_starts_with($image, 'https://')
            ? $image
            : url($image),
        $productGallery !== [] ? array_values($productGallery) : [$productImageUrl]
    );

    $manufacturer = trim((string) ($product->specs['manufacturer'] ?? ''));
    $conditionRaw = mb_strtolower(trim((string) ($product->specs['condition'] ?? '')));
    $itemCondition = str_contains($conditionRaw, 'б/у') || str_contains($conditionRaw, 'used')
        ? 'https://schema.org/UsedCondition'
        : 'https://schema.org/NewCondition';

    $productSchema = [
        '@context' => 'https://schema.org',
        '@type' => 'Product',
        'name' => $product->name,
        'description' => $product->short_description ?: ($product->description ?: "Купить {$product->name} по выгодной цене."),
        'sku' => $product->sku ?: null,
        'category' => $product->category?->name,
        'image' => $productSchemaImages,
        'url' => route('products.show', $product),
        'offers' => [
            '@type' => 'Offer',
            'priceCurrency' => config('shop.currency_code', 'RUB'),
            'price' => (string) $product->price,
            'availability' => $product->stock > 0 ? 'https://schema.org/InStock' : 'https://schema.org/OutOfStock',
            'itemCondition' => $itemCondition,
            'url' => route('products.show', $product),
        ],
    ];

    if ($manufacturer !== '') {
        $productSchema['brand'] = [
            '@type' => 'Brand',
            'name' => $manufacturer,
        ];
    }
@endphp

@section('meta_title', $product->name)
@section('meta_description', \Illuminate\Support\Str::limit(strip_tags($product->short_description ?: ($product->description ?: "Купить {$product->name} по выгодной цене.")), 160))
@section('meta_keywords', $product->name . ', ' . ($product->category?->name ?? 'товар') . ', купить')
@section('meta_canonical', route('products.show', $product))
@section('meta_image', $productImageUrl)
@section('meta_image_alt', $product->name)
@section('meta_og_type', 'product')

@push('structured_data')
    <script type="application/ld+json">
        @json($productSchema, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES)
    </script>
@endpush

@section('content')
    @php
        $favoriteIds = array_map('intval', (array) session('favorites', []));
        $compareIds = array_map('intval', (array) session('compare', []));
        $isFavorite = in_array($product->id, $favoriteIds, true);
        $isCompared = in_array($product->id, $compareIds, true);
        $cartItems = (array) session('cart', []);
        $isInCart = isset($cartItems[$product->id]);
    @endphp

    @include('partials.breadcrumbs', [
        'items' => [
            ['label' => 'Главная', 'url' => route('home')],
            ['label' => 'Каталог', 'url' => route('catalog.index')],
            ['label' => $product->category?->name ?? 'Категория', 'url' => $product->category ? route('catalog.category', $product->category) : null],
            ['label' => $product->name, 'url' => null],
        ],
    ])

    <section class="pc-section pc-product-page">
        <div class="pc-product-hero">
            <div class="pc-product-gallery" data-product-gallery>
                @if ($productGallery !== [])
                    <img
                        class="pc-product-image-lg"
                        src="{{ $productGallery[0] }}"
                        alt="{{ $product->name }}"
                        loading="eager"
                        decoding="async"
                        data-product-gallery-main
                    >
                @else
                    <div class="pc-product-image-lg" role="img" aria-label="{{ $product->name }}"></div>
                @endif

                @if (count($productGallery) > 1)
                    <div class="pc-product-thumbs" aria-label="Дополнительные изображения товара">
                        @foreach ($productGallery as $imageUrl)
                            <button
                                class="pc-product-thumb {{ $loop->first ? 'is-active' : '' }}"
                                type="button"
                                data-product-gallery-thumb
                                data-image-src="{{ $imageUrl }}"
                                data-image-alt="{{ $product->name }} - фото {{ $loop->iteration }}"
                                aria-label="Показать фото {{ $loop->iteration }}"
                                aria-pressed="{{ $loop->first ? 'true' : 'false' }}"
                            >
                                <img
                                    src="{{ $imageUrl }}"
                                    alt="{{ $product->name }} - миниатюра {{ $loop->iteration }}"
                                    loading="lazy"
                                    decoding="async"
                                >
                            </button>
                        @endforeach
                    </div>
                @endif
            </div>
            <div class="pc-product-info">
                <h1>{{ $product->name }}</h1>
                <p class="pc-muted">{{ $product->short_description }}</p>
                <div class="pc-product-badges">
                    @if ($product->sku)
                        <span class="pc-sku">Артикул: {{ $product->sku }}</span>
                    @endif
                </div>
                <div class="pc-product-price">
                    <strong>{{ number_format($product->price, 0, '.', ' ') }} {{ config('shop.currency_symbol', '₽') }}</strong>
                    @if (!empty($product->old_price))
                        <span class="pc-product-old">{{ number_format($product->old_price, 0, '.', ' ') }} {{ config('shop.currency_symbol', '₽') }}</span>
                    @endif
                </div>
                <div class="pc-product-actions">
                    @if ($product->stock > 0)
                        <form method="post" action="{{ route('cart.add', $product) }}" data-preserve-scroll="true">
                            @csrf
                            <button class="pc-btn primary {{ $isInCart ? 'is-active' : '' }}" type="submit">
                                {{ $isInCart ? 'В корзине' : 'В корзину' }}
                            </button>
                        </form>
                    @else
                        <button class="pc-btn primary" type="button" disabled>Нет в наличии</button>
                    @endif
                    <form method="post" action="{{ route('favorites.toggle', $product) }}" data-preserve-scroll="true">
                        @csrf
                        <button class="pc-btn ghost {{ $isFavorite ? 'is-active' : '' }}" type="submit">
                            {{ $isFavorite ? 'Убрать из избранного' : 'В избранное' }}
                        </button>
                    </form>
                    <form method="post" action="{{ route('compare.toggle', $product) }}" data-preserve-scroll="true">
                        @csrf
                        <button class="pc-btn ghost {{ $isCompared ? 'is-active' : '' }}" type="submit">
                            {{ $isCompared ? 'Убрать из сравнения' : 'В сравнение' }}
                        </button>
                    </form>
                </div>
            </div>
        </div>

        <div class="pc-tabs">
            <input type="radio" name="product-tabs" id="tab-specs" checked>
            <input type="radio" name="product-tabs" id="tab-desc">
            <input type="radio" name="product-tabs" id="tab-shipping">
            <input type="radio" name="product-tabs" id="tab-payment">

            <div class="pc-tab-labels">
                <label for="tab-specs">Характеристики</label>
                <label for="tab-desc">Описание</label>
                <label for="tab-shipping">Доставка</label>
                <label for="tab-payment">Оплата</label>
            </div>

            <div class="pc-tab-content">
                <section class="pc-tab-panel pc-tab-specs">
                    <div class="pc-specs-grid">
                        @forelse (($product->specs ?? []) as $key => $value)
                            <div class="pc-spec-row">
                                <span>{{ $specLabels[$key] ?? str_replace('_', ' ', $key) }}</span>
                                <strong>{{ $value }}</strong>
                            </div>
                        @empty
                            <p class="pc-muted">Характеристики еще не добавлены.</p>
                        @endforelse
                    </div>
                </section>
                <section class="pc-tab-panel pc-tab-desc">
                    <p class="pc-muted">{{ $product->description ?? 'Описание товара будет добавлено позже.' }}</p>
                </section>
                <section class="pc-tab-panel pc-tab-shipping">
                    <ul class="pc-list">
                        <li>Доставка курьером по городу</li>
                        <li>Самовывоз из пункта выдачи</li>
                        <li>Отправка по стране 1-3 дня</li>
                    </ul>
                </section>
                <section class="pc-tab-panel pc-tab-payment">
                    <ul class="pc-list">
                        <li>Оплата картой онлайн</li>
                        <li>Банковский перевод</li>
                        <li>Рассрочка на крупные заказы</li>
                    </ul>
                </section>
            </div>
        </div>
    </section>

    @if ($related->isNotEmpty())
        <section class="pc-section">
            <div class="pc-section-title">
                <h2>Что еще посмотреть в этой категории</h2>
            </div>
            <div class="pc-products-grid">
                @foreach ($related as $item)
                    @include('partials.product-card', ['product' => $item])
                @endforeach
            </div>
        </section>
    @endif
@endsection