{# 
    Reusable meta tags include for SEO and social media.
    
    Parameters:
    - item: The content object (post or page)
    - content_type: "article" or "website"
    - include_keywords: Boolean to include keywords meta tag (default: false)
    - include_article_tags: Boolean to include article-specific OG tags (default: false)
#}

{# Set default values for optional parameters #}
{% set include_keywords = include_keywords | default(false) %}
{% set include_article_tags = include_article_tags | default(false) %}

{# Standard SEO meta tags #}
{% set item_author = item.metadata.get('author') if item.metadata else none %}
{% set effective_author = item_author if item_author else default_author %}
{% set item_author_url = item.metadata.get('author_url') if item.metadata else none %}
{% set effective_author_url = item_author_url if item_author_url else default_author_url %}
{% if effective_author %}
<meta name="author" content="{{ effective_author }}">
{% endif %}
{% set description = item.description if item.description else site_description %}
{% if description %}
<meta name="description" content="{{ description }}">
{% endif %}
{% if include_keywords and item.tags %}
<meta name="keywords" content="{{ item.tags|join(', ') }}">
{% elif include_keywords and site_keywords %}
<meta name="keywords" content="{{ site_keywords|join(', ') }}">
{% endif %}

{# Determine the primary image for social media and JSON-LD #}
{% set raw_cover = item.metadata.get('cover') if item.metadata else none %}
{% set social_image_url = none %}
{% if raw_cover %}
    {% if raw_cover.startswith(('http://', 'https://')) %}
        {% set social_image_url = raw_cover %}
    {% elif raw_cover.startswith('/') %}
        {% set social_image_url = site_url ~ raw_cover %}
    {% else %}
        {% set social_image_url = site_url ~ '/' ~ raw_cover %}
    {% endif %}
{% elif has_platform_icons %}
    {% set social_image_url = site_url ~ '/icons/android-chrome-512x512.png' %}
{% elif site_logo %}
    {% if site_logo.startswith(('http://', 'https://')) %}
        {% set social_image_url = site_logo %}
    {% elif site_logo.startswith('/') %}
        {% set social_image_url = site_url ~ site_logo %}
    {% else %}
        {% set social_image_url = site_url ~ '/' ~ site_logo %}
    {% endif %}
{% endif %}

{# Open Graph meta tags #}
<meta property="og:title" content="{{ item.title }}">
<meta property="og:type" content="{{ content_type }}">
<meta property="og:url" content="{{ site_url }}{{ item.url }}">
{% if description %}
<meta property="og:description" content="{{ description }}">
{% endif %}
<meta property="og:site_name" content="{{ site_title }}">
{% if social_image_url %}
<meta property="og:image" content="{{ social_image_url }}">
{% endif %}

{# Article-specific Open Graph tags #}
{% if include_article_tags %}
{% if item.date %}
<meta property="article:published_time" content="{{ item.date.isoformat() }}">
{% endif %}
{% if item.modified_date %}
<meta property="article:modified_time" content="{{ item.modified_date.isoformat() }}">
{% elif item.date %}
<meta property="article:modified_time" content="{{ item.date.isoformat() }}">
{% endif %}
{% if item.metadata and item.metadata.get('author') %}
<meta property="article:author" content="{{ item.metadata.get('author') }}">
{% endif %}
{% if item.category %}
<meta property="article:section" content="{{ item.category }}">
{% endif %}
{% if item.tags %}
{% for tag in item.tags %}
<meta property="article:tag" content="{{ tag }}">
{% endfor %}
{% endif %}
{% endif %}

{# Twitter Card meta tags #}
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:title" content="{{ item.title }}">
{% if description %}
<meta name="twitter:description" content="{{ description }}">
{% endif %}
{% if social_image_url %}
<meta name="twitter:image" content="{{ social_image_url }}">
{% endif %}
{% if item.metadata and item.metadata.get('twitter_creator') %}
<meta name="twitter:creator" content="{{ item.metadata.get('twitter_creator') }}">
{% endif %}
{% if item.metadata and item.metadata.get('twitter_site') %}
<meta name="twitter:site" content="{{ item.metadata.get('twitter_site') }}">
{% endif %}

{# JSON-LD Structured Data #}
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "{{ 'BlogPosting' if content_type == 'article' else 'WebPage' }}",
  "headline": {{ item.title | tojson }},
  "url": "{{ site_url }}{{ item.url }}",
  {% if description %}
  "description": {{ description | tojson }},
  {% endif %}
  {% if social_image_url %}
  "image": [
    "{{ social_image_url }}"
  ],
  {% endif %}
  {% if item.date %}
  "datePublished": "{{ item.date.isoformat() }}",
  {% endif %}
  {% if item.modified_date %}
  "dateModified": "{{ item.modified_date.isoformat() }}",
  {% elif item.date %}
  "dateModified": "{{ item.date.isoformat() }}",
  {% endif %}
  {% if effective_author %}
  "author": {
    "@type": "Person",
    "name": {{ effective_author | tojson }}{% if effective_author_url %},
    "url": {{ effective_author_url | tojson }}{% endif %}
  },
  {% endif %}
  "publisher": {
    "@type": "Organization",
    "name": {{ (site_title | default('Blog')) | tojson }}
    {% if site_logo %},
    "logo": {
      "@type": "ImageObject",
      "url": "{% if site_logo.startswith('http') %}{{ site_logo }}{% else %}{{ site_url }}{{ site_logo if site_logo.startswith('/') else '/' ~ site_logo }}{% endif %}"
    }
    {% elif has_platform_icons and not raw_cover %},
    "logo": {
      "@type": "ImageObject",
      "url": "{{ site_url }}/icons/android-chrome-512x512.png"
    }
    {% endif %}
  },
  "mainEntityOfPage": {
    "@type": "WebPage",
    "@id": "{{ site_url }}{{ item.url }}"
  }{% if item.tags %},
  "keywords": {{ item.tags | join(', ') | tojson }}
  {% endif %}
}
</script>

{# BreadcrumbList JSON-LD #}
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "BreadcrumbList",
  "itemListElement": [{
    "@type": "ListItem",
    "position": 1,
    "name": "Home",
    "item": "{{ site_url }}/"
  }
  {% if content_type == 'article' and item.category %},
  {
    "@type": "ListItem",
    "position": 2,
    "name": {{ item.category | tojson }},
    "item": "{{ site_url }}/{{ category_dir }}/{{ item.safe_category }}/"
  },
  {
    "@type": "ListItem",
    "position": 3,
    "name": {{ item.title | tojson }},
    "item": "{{ site_url }}{{ item.url }}"
  }
  {% else %},
  {
    "@type": "ListItem",
    "position": 2,
    "name": {{ item.title | tojson }},
    "item": "{{ site_url }}{{ item.url }}"
  }
  {% endif %}
  ]
}
</script>