{#-
Product JSON-LD Structured Data Component

Generates schema.org Product structured data for SEO optimization.
Only renders when:
  1. page.structured_data is true
  2. page.type == 'product'

Uses page frontmatter:
  - title: Product name
  - description: Product description
  - price: Product price
  - currency: Currency code (default: USD)
  - sku: Stock keeping unit
  - in_stock: Boolean availability
  - images: List of image URLs

Example frontmatter:
  ---
  title: Product Name
  type: product
  price: 99.99
  currency: USD
  sku: "PROD-001"
  in_stock: true
  images:
    - /images/product.jpg
  structured_data: true
  ---

Usage in base.html or product layout:
  {% include "partials/product-jsonld.html" %}
-#}

{%- if (page?.structured_data ?? none) and (page?.type ?? '') == 'product' %}
<script type="application/ld+json">
{
  "@context": "https://schema.org/",
  "@type": "Product",
  "name": {{ page.title | tojson }},
  "description": {{ (page.description ?? page.summary ?? '') | tojson }},
  {%- match page.images, page.image %}
    {% case images, _ if images %}"image": {{ images | tojson }},
    {% case _, image if image %}"image": {{ [image] | tojson }},
    {% case _ %}"image": [],
  {% end %}
  {%- with page.sku as sku %}
  "sku": {{ sku | tojson }},
  {% end %}
  {%- with page.brand as brand %}
  "brand": {
    "@type": "Brand",
    "name": {{ brand | tojson }}
  },
  {% end %}
  "offers": {
    "@type": "Offer",
    {%- with page.price as price %}
    "price": {{ price | string | tojson }},
    {% end %}
    "priceCurrency": {{ (page.currency ?? "USD") | tojson }},
    "availability": "https://schema.org/{{ 'InStock' if (page.in_stock ?? true) else 'OutOfStock' }}",
    {%- with page.url as url %}
    "url": "{{ site.baseurl }}{{ url }}",
    {% end %}
    "priceValidUntil": "{{ page.price_valid_until ?? (now() | dateformat('%Y-12-31')) }}"
  }
  {%- with page.aggregate_rating as rating %}
  ,
  "aggregateRating": {
    "@type": "AggregateRating",
    "ratingValue": {{ (rating.value ?? 4.5) | string | tojson }},
    "reviewCount": {{ (rating.count ?? 1) | string | tojson }}
  }
  {% end %}
}
</script>
{% end %}