{# ABOUTME: Book-detail Collections section — membership, add-to-static, quick-create. #}
{# ABOUTME: Outer-swapped by book_add_to_collection; rule collections are excluded. #}
{% set seed_query = ('series:"%s"' % book.metadata.series) if book.metadata.series
   else ('author:"%s"' % (book.metadata.authors[0] if book.metadata.authors else '')) %}
{% set seed_name = book.metadata.series if book.metadata.series
   else (book.metadata.authors[0] if book.metadata.authors else '') %}
<section id="book-collections" class="section book-collections"
         aria-labelledby="book-collections-heading" aria-live="polite">
    <h2 id="book-collections-heading">Collections</h2>

    {% if collections %}
    <ul class="collection-memberships">
        {% for collection in collections %}
        <li>
            <a href="{{ url_for('web.collection_detail', collection_id=collection.id) }}">
                {{ collection.name }}
            </a>
            <form method="POST"
                  action="{{ url_for('web.collection_remove_book', collection_id=collection.id, book_id=book.id) }}"
                  hx-post="{{ url_for('web.collection_remove_book', collection_id=collection.id, book_id=book.id) }}"
                  hx-target="#book-collections"
                  hx-swap="outerHTML"
                  class="inline-form">
                <button type="submit" class="btn-small">Remove</button>
            </form>
        </li>
        {% endfor %}
    </ul>
    {% else %}
    <p class="empty">Not in any collection yet.</p>
    {% endif %}

    {% if static_collections %}
    <form method="POST"
          action="{{ url_for('web.book_add_to_collection', book_id=book.id) }}"
          hx-post="{{ url_for('web.book_add_to_collection', book_id=book.id) }}"
          hx-target="#book-collections"
          hx-swap="outerHTML"
          class="add-to-collection">
        <label for="add-collection-select">Add to collection</label>
        <select id="add-collection-select" name="collection_id">
            {% for collection in static_collections %}
            <option value="{{ collection.id }}">{{ collection.name }}</option>
            {% endfor %}
        </select>
        <button type="submit" class="btn-small">Add</button>
    </form>
    {% endif %}

    <p class="quick-create">
        <a href="{{ url_for('web.collection_new_form') }}?query={{ seed_query | urlencode }}{% if seed_name %}&amp;name={{ seed_name | urlencode }}{% endif %}">
            New collection from this book&hellip;
        </a>
    </p>
</section>