{# SPDX-FileCopyrightText: 2026 PythonWoods <dev@pythonwoods.dev> #}
{# SPDX-License-Identifier: Apache-2.0 #}
{#
  header.html — Global site header with marketing nav (Home · Docs).
  About is surfaced in the Docs sidebar, not in the top nav.
  Active link is emphasised based on the current page URL.
#}

{# Determine active section #}
{% set is_home = page.url in ["", ".", "en/", "it/"] or page.url == "./" %}
{% set is_docs = not is_home %}

{# Labels (language-aware) #}
{% if config.theme.language == "it" %}
  {% set label_home = "Home" %}
  {% set label_docs = "Docs" %}
{% else %}
  {% set label_home = "Home" %}
  {% set label_docs = "Docs" %}
{% endif %}

{# Language switcher sources: explicit extra.alternate or i18n plugin languages #}
{% set alternate = namespace(items=[]) %}
{% if config.extra.alternate %}
  {% set alternate.items = config.extra.alternate %}
{% elif "i18n" in config.plugins %}
  {% set i18n = config.plugins["i18n"] | attr("config") %}
  {% if i18n and i18n.languages %}
    {% for language in i18n.languages %}
      {% if language.build | d(true) %}
        {% if language.default | d(false) %}
          {% set link = language.link | d("/") %}
        {% else %}
          {% set link = language.link | d("/" ~ language.locale ~ "/") %}
        {% endif %}
        {% set alternate.items = alternate.items + [{"name": language.name | d(language.locale), "link": link, "lang": language.locale}] %}
      {% endif %}
    {% endfor %}
  {% endif %}
{% endif %}

<header class="md-header md-header--shadow" data-md-component="header">
  <nav class="md-header__inner md-grid" aria-label="{{ lang.t('header') }}">

    {# Logo #}
    <a href="{{ config.extra.homepage | d(nav.homepage.url, true) | url }}"
       title="{{ config.site_name | e }}"
       class="md-header__button md-logo"
       aria-label="{{ config.site_name }}"
       data-md-component="logo">
      {% include "partials/logo.html" %}
    </a>

    {# Mobile drawer toggle #}
    <label class="md-header__button md-icon" for="__drawer" aria-label="{{ lang.t('nav') }}">
      {% set icon = config.theme.icon.menu or "material/menu" %}
      {% include ".icons/" ~ icon ~ ".svg" %}
    </label>

    {# Site title (mobile) #}
    <div class="md-header__title" data-md-component="header-title">
      <div class="md-header__ellipsis">
        <div class="md-header__topic">
          <span class="md-ellipsis">{{ config.site_name }}</span>
        </div>
        <div class="md-header__topic" data-md-component="header-topic">
          <span class="md-ellipsis">
            {% if page.meta and page.meta.title %}
              {{ page.meta.title }}
            {% else %}
              {{ page.title }}
            {% endif %}
          </span>
        </div>
      </div>
    </div>

    {# Nav — Home · Docs #}
    <nav class="zz-home-nav" aria-label="Site sections">
      <a href="{{ '' | url }}"
         class="zz-home-nav__link{% if is_home %} zz-home-nav__link--active{% endif %}">
        {{ label_home }}
      </a>
      <a href="{{ 'guide/' | url }}"
         class="zz-home-nav__link{% if is_docs %} zz-home-nav__link--active{% endif %}">
        {{ label_docs }}
      </a>
    </nav>

    {# Dark/light toggle #}
    {% if config.theme.palette %}
      {% if not config.theme.palette is mapping %}
        {% include "partials/palette.html" %}
      {% endif %}
    {% endif %}
    {% if not config.theme.palette is mapping %}
      {% include "partials/javascripts/palette.html" %}
    {% endif %}

    {# Language switcher #}
    {% if alternate.items | length > 1 %}
      <div class="md-header__option">
        <div class="md-select">
          {% set icon = config.theme.icon.alternate or "material/translate" %}
          <button class="md-header__button md-icon" aria-label="{{ lang.t('select.language') }}">
            {% include ".icons/" ~ icon ~ ".svg" %}
          </button>
          <div class="md-select__inner">
            <ul class="md-select__list">
              {% for alt in alternate.items %}
                <li class="md-select__item">
                  <a href="{{ alt.link | url }}" hreflang="{{ alt.lang }}" class="md-select__link">
                    {{ alt.name }}
                  </a>
                </li>
              {% endfor %}
            </ul>
          </div>
        </div>
      </div>
    {% endif %}

    {# Search #}
    {% if "search" in config.plugins %}
      {% set search = config.plugins["search"] | attr("config") %}
      {% if search.enabled %}
        <label class="md-header__button md-icon" for="__search" aria-label="{{ lang.t('search') }}">
          {% set icon = config.theme.icon.search or "material/magnify" %}
          {% include ".icons/" ~ icon ~ ".svg" %}
        </label>
        {% include "partials/search.html" %}
      {% endif %}
    {% endif %}

    {# GitHub repo #}
    <div class="md-header__source">
      {% if config.repo_url %}
        {% include "partials/source.html" %}
      {% endif %}
    </div>

  </nav>
</header>