{# FE2-2: /corpus — a read lens over the processed-papers corpus (state DB). #}
{% extends "base.html" %}
{% block title %}Corpus — lit-monitor{% endblock %}
{% block content %}
<section class="dashboard">
  <div class="page-header">
    <h1>Corpus</h1>
    <p class="field-note">
      Every paper and review processed into the state DB. This is a read lens
      over what brain-build has indexed &mdash; not your full Zotero library.
    </p>
  </div>

  {# Filter form: hx-get refreshes only the #corpus-table region. New filters
     reset to offset 0 (the hidden offset starts at 0; pagination links carry
     the current filters forward). #}
  <form class="corpus-filters button-row"
        hx-get="/corpus"
        hx-target="#corpus-table"
        hx-swap="innerHTML"
        hx-trigger="submit, change from:select">
    <input type="search" name="search" value="{{ search }}"
           placeholder="Search title or DOI…" aria-label="Search title or DOI" />

    <select name="source_type" aria-label="Source type">
      <option value="">All sources</option>
      <option value="paper"{% if source_type == "paper" %} selected{% endif %}>paper</option>
      <option value="review"{% if source_type == "review" %} selected{% endif %}>review</option>
    </select>

    <select name="status_gap" aria-label="Status gap">
      {% for opt in status_gap_options %}
      <option value="{{ opt }}"{% if status_gap == opt %} selected{% endif %}>
        {{ opt if opt else "(any)" }}
      </option>
      {% endfor %}
    </select>

    {# PF-3: theme/cluster filter. On a fresh install there are no clusters yet,
       so render a "no themes" note instead of an empty/broken <select>. The
       select sits inside this same hx-get form, so changing it filters. #}
    {% if themes %}
    <select name="theme" aria-label="Theme">
      <option value="">(any theme)</option>
      {% for t in themes %}
      <option value="{{ t.display_name }}"{% if theme == t.display_name %} selected{% endif %}>{{ t.display_name }}</option>
      {% endfor %}
    </select>
    {% else %}
    <input type="hidden" name="theme" value="{{ theme }}" />
    <span class="field-note">No themes yet &mdash; run a brain-build to cluster papers.</span>
    {% endif %}
    <input type="hidden" name="sort" value="{{ sort }}" />
    <input type="hidden" name="order" value="{{ order }}" />
    <input type="hidden" name="limit" value="{{ limit }}" />
    <input type="hidden" name="offset" value="0" />

    <button type="submit" class="btn btn-secondary btn-sm">Apply</button>
  </form>

  <div id="corpus-table">
    {% include "corpus/_table.html" %}
  </div>
</section>
{% endblock %}