{% extends "layouts/reader.njk" %}

{% block reader %}
  <div class="timeline-view">
    <header class="timeline-view__header">
      <h1>{{ __("microsub.views.timeline") }}</h1>
      <div class="timeline-view__actions">
        {% if channels.length > 0 %}
        <details class="timeline-view__filter">
          <summary class="button button--secondary button--small">
            Filter channels
          </summary>
          <form action="{{ baseUrl }}/timeline" method="GET" class="timeline-view__filter-form">
            {% for ch in channels %}
            {% if ch.uid !== "notifications" %}
            <label class="timeline-view__filter-label">
              <input type="checkbox" name="exclude" value="{{ ch._id }}"
                {% if excludeIds and ch._id.toString() in excludeIds %}checked{% endif %}>
              <span class="timeline-view__filter-color" style="background: {{ ch.color }}"></span>
              {{ ch.name }}
            </label>
            {% endif %}
            {% endfor %}
            <button type="submit" class="button button--primary button--small">Apply</button>
          </form>
        </details>
        {% endif %}
      </div>
    </header>

    {% if items.length > 0 %}
    <div class="timeline" id="timeline">
      {% for item in items %}
      <div class="timeline-view__item" style="border-left: 4px solid {{ item._channelColor or '#ccc' }}">
        {% include "partials/item-card.njk" %}
        {% if item._channelName %}
        <span class="timeline-view__channel-label" style="color: {{ item._channelColor or '#888' }}">
          {{ item._channelName }}
        </span>
        {% endif %}
      </div>
      {% endfor %}
    </div>

    {% if paging %}
    <nav class="timeline__paging" aria-label="Pagination">
      {% if paging.before %}
      <a href="?before={{ paging.before }}" class="button button--secondary">
        {{ __("microsub.reader.newer") }}
      </a>
      {% else %}
      <span></span>
      {% endif %}
      {% if paging.after %}
      <a href="?after={{ paging.after }}" class="button button--secondary">
        {{ __("microsub.reader.older") }}
      </a>
      {% endif %}
    </nav>
    {% endif %}

    {% else %}
    <div class="reader__empty">
      <p>{{ __("microsub.reader.empty") }}</p>
    </div>
    {% endif %}
  </div>

  <script type="module">
    const timeline = document.getElementById('timeline');
    if (timeline) {
      const items = Array.from(timeline.querySelectorAll('.item-card'));
      let currentIndex = -1;

      function focusItem(index) {
        if (items[currentIndex]) items[currentIndex].classList.remove('item-card--focused');
        currentIndex = Math.max(0, Math.min(index, items.length - 1));
        if (items[currentIndex]) {
          items[currentIndex].classList.add('item-card--focused');
          items[currentIndex].scrollIntoView({ behavior: 'smooth', block: 'center' });
        }
      }

      document.addEventListener('keydown', (e) => {
        if (e.target.tagName === 'INPUT' || e.target.tagName === 'TEXTAREA') return;
        switch(e.key) {
          case 'j': e.preventDefault(); focusItem(currentIndex + 1); break;
          case 'k': e.preventDefault(); focusItem(currentIndex - 1); break;
          case 'o': case 'Enter':
            e.preventDefault();
            if (items[currentIndex]) {
              const link = items[currentIndex].querySelector('.item-card__link');
              if (link) link.click();
            }
            break;
        }
      });
    }
  </script>
{% endblock %}