{# --- SET VARIABLES --- #}
{% set description = (page.meta.description if page and page.meta else none) or config.site_description %}
{% set title = (page.title if page and page.title else none) or config.site_name %}
{% set raw_keywords = page.meta.keywords if page and page.meta and page.meta.keywords else config.extra.keywords %}
{% if raw_keywords is iterable and raw_keywords is not string %}
  {% set keywords = raw_keywords | join(', ') %}
{% else %}
  {% set keywords = raw_keywords %}
{% endif %}

<meta name="google-site-verification" content="{{ config.extra.google_site_verification }}" />
<meta name="description" content="{{ description }}">
{% if keywords %}
  <meta name="keywords" content="{{ keywords }}">
{% endif %}

{# Open Graph Meta Tags #}
<meta property="og:type" content="website">
<meta property="og:url" content="{{ config.site_url }}/">
<meta property="og:title" content="{{ title }}">
<meta property="og:description" content="{{ description }}">
<meta property="og:image" content="{{ config.extra.og_image }}">

{# Twitter Card Meta Tags #}
<meta property="twitter:card" content="summary_large_image">
<meta property="twitter:url" content="{{ config.site_url }}/">
<meta property="twitter:title" content="{{ title }}">
<meta property="twitter:description" content="{{ description }}">
<meta property="twitter:image" content="{{ config.extra.og_image }}">

{# Robots Meta Tag #}
<meta name="robots" content="index, follow">

{# Structured Data (JSON-LD) #}
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "SoftwareApplication",
  "name": "{{ title }}",
  "description": "{{ description }}",
  "applicationCategory": "DeveloperApplication",
  "operatingSystem": "Cross-platform",
  "author": {
    "@type": "Person",
    "name": "{{ config.site_author }}"
  },
  "programmingLanguage": "Python",
  "url": "{{ config.site_url }}",
  "codeRepository": "{{ config.repo_url }}"
}
</script>