{% extends "base.html" %}
{% block title %}Comments & Annotations - {{ file.original_filename or 'Document' }} - DocuElevate{% endblock %}

{% block head_extra %}
  <script src="/static/js/common.js"></script>
  <style>
    .annotations-container { max-width: 1200px; margin: 0 auto; }

    /* ── PDF viewer ── */
    .pdf-viewer-card {
      background: white; border-radius: 0.5rem;
      box-shadow: 0 1px 3px rgba(0,0,0,.08);
      margin-bottom: 1.25rem; overflow: hidden;
    }
    .dark .pdf-viewer-card { background: #1f2937; box-shadow: 0 1px 3px rgba(0,0,0,.3); }
    .pdf-viewer-card-header {
      display: flex; align-items: center; gap: 0.5rem;
      padding: 1rem 1.5rem; border-bottom: 1px solid #e5e7eb;
      font-weight: 700; font-size: 0.95rem; color: #374151;
    }
    .dark .pdf-viewer-card-header { border-bottom-color: #374151; color: #d1d5db; }
    #embedpdf-viewer { width: 100%; height: 600px; }

    /* ── header ── */
    .annotations-header {
      display: flex; align-items: flex-start; justify-content: space-between;
      gap: 1rem; margin-bottom: 1.5rem; flex-wrap: wrap;
    }
    .annotations-title { font-size: 1.5rem; font-weight: 700; color: #1f2937; line-height: 1.25; }
    .annotations-subtitle { font-size: 0.85rem; color: #6b7280; margin-top: 0.25rem; }
    .dark .annotations-title { color: #f3f4f6; }
    .dark .annotations-subtitle { color: #9ca3af; }

    /* ── error ── */
    .error-box { background: #fee2e2; border: 1px solid #f87171; color: #b91c1c; padding: 1rem; border-radius: 0.375rem; margin-bottom: 1rem; }

    /* ── card ── */
    .collab-card {
      background: white; border-radius: 0.5rem;
      box-shadow: 0 1px 3px rgba(0,0,0,.08);
      padding: 1.5rem; margin-bottom: 1.25rem;
    }
    .dark .collab-card { background: #1f2937; box-shadow: 0 1px 3px rgba(0,0,0,.3); }

    /* ── Comments panel ───────────────────────────────────────────────────── */
    .comments-panel, .annotations-panel {
      margin-top: 0;
    }
    .panel-header {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      margin-bottom: 1rem;
    }
    .panel-header h3 {
      margin-bottom: 0;
    }
    .comments-empty, .annotations-empty {
      text-align: center;
      padding: 2rem;
      color: #718096;
    }
    .comments-loading, .annotations-loading {
      text-align: center;
      padding: 1.5rem;
      color: #718096;
    }
    .comments-error {
      text-align: center;
      padding: 1rem;
      color: #991B1B;
    }

    /* Individual comment */
    .comment-item {
      background-color: #f7fafc;
      border-radius: 0.5rem;
      padding: 1rem;
      margin-bottom: 0.75rem;
      border-left: 3px solid #4299e1;
    }
    .dark .comment-item {
      background-color: #2d3748;
      border-left-color: #63b3ed;
    }
    .comment-item.comment-reply {
      margin-left: 1.5rem;
      border-left-color: #a0aec0;
      background-color: #edf2f7;
    }
    .dark .comment-item.comment-reply {
      background-color: #1a202c;
      border-left-color: #4a5568;
    }
    .comment-item.comment-resolved {
      opacity: 0.75;
      border-left-color: #48bb78;
    }
    .comment-header {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      margin-bottom: 0.5rem;
      flex-wrap: wrap;
    }
    .comment-author {
      font-weight: 600;
      color: #2d3748;
      font-size: 0.875rem;
    }
    .dark .comment-author {
      color: #e2e8f0;
    }
    .comment-time {
      font-size: 0.75rem;
      color: #718096;
    }
    .comment-resolved-badge {
      font-size: 0.75rem;
      color: #065F46;
      background-color: #D1FAE5;
      padding: 0.125rem 0.5rem;
      border-radius: 9999px;
      font-weight: 600;
    }
    .dark .comment-resolved-badge {
      background-color: #065F46;
      color: #D1FAE5;
    }
    .comment-body {
      color: #4a5568;
      font-size: 0.9375rem;
      line-height: 1.5;
      margin-bottom: 0.5rem;
      word-break: break-word;
    }
    .dark .comment-body {
      color: #cbd5e0;
    }
    .comment-mention {
      color: #3182ce;
      font-weight: 600;
    }
    .dark .comment-mention {
      color: #63b3ed;
    }
    .comment-actions {
      display: flex;
      gap: 0.5rem;
      flex-wrap: wrap;
    }
    .comment-action-btn {
      background: none;
      border: 1px solid #e2e8f0;
      color: #718096;
      font-size: 0.75rem;
      padding: 0.25rem 0.5rem;
      border-radius: 0.25rem;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 0.25rem;
      min-height: 28px;
    }
    .comment-action-btn:hover {
      background-color: #edf2f7;
      color: #2d3748;
    }
    .dark .comment-action-btn {
      border-color: #4a5568;
      color: #a0aec0;
    }
    .dark .comment-action-btn:hover {
      background-color: #4a5568;
      color: #e2e8f0;
    }
    .comment-action-btn--danger:hover {
      background-color: #FEE2E2;
      color: #991B1B;
      border-color: #f56565;
    }
    .dark .comment-action-btn--danger:hover {
      background-color: #742a2a;
      color: #feb2b2;
      border-color: #f56565;
    }
    .comment-replies {
      margin-top: 0.75rem;
    }

    /* Comment form */
    .comment-form-wrapper {
      margin-top: 1rem;
    }
    .comment-textarea {
      width: 100%;
      border: 1px solid #e2e8f0;
      border-radius: 0.375rem;
      padding: 0.75rem;
      font-size: 0.875rem;
      resize: vertical;
      min-height: 60px;
      font-family: inherit;
    }
    .dark .comment-textarea {
      background-color: #2d3748;
      border-color: #4a5568;
      color: #e2e8f0;
    }
    .comment-textarea:focus {
      outline: none;
      border-color: #4299e1;
      box-shadow: 0 0 0 2px rgba(66, 153, 225, 0.3);
    }
    .comment-submit-btn {
      background-color: #4299e1;
      color: white;
      border: none;
      padding: 0.5rem 1rem;
      border-radius: 0.375rem;
      font-size: 0.875rem;
      cursor: pointer;
      font-weight: 600;
      margin-top: 0.5rem;
      min-height: 36px;
    }
    .comment-submit-btn:hover {
      background-color: #3182ce;
    }
    .comment-cancel-btn {
      background-color: #e2e8f0;
      color: #4a5568;
      border: none;
      padding: 0.5rem 1rem;
      border-radius: 0.375rem;
      font-size: 0.875rem;
      cursor: pointer;
      margin-top: 0.5rem;
      margin-left: 0.5rem;
      min-height: 36px;
    }
    .dark .comment-cancel-btn {
      background-color: #4a5568;
      color: #e2e8f0;
    }
    .comment-edit-btns, .annotation-edit-btns {
      display: flex;
      gap: 0.5rem;
      margin-top: 0.5rem;
    }
    .comment-reply-form {
      margin-top: 0.75rem;
      padding-top: 0.75rem;
      border-top: 1px solid #e2e8f0;
    }
    .dark .comment-reply-form {
      border-top-color: #4a5568;
    }

    /* @mention dropdown */
    .mention-dropdown-wrapper {
      position: relative;
    }
    #mention-dropdown {
      position: absolute;
      bottom: 100%;
      left: 0;
      width: 280px;
      max-height: 200px;
      overflow-y: auto;
      background-color: white;
      border: 1px solid #e2e8f0;
      border-radius: 0.375rem;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
      z-index: 50;
      margin-bottom: 0.25rem;
    }
    .dark #mention-dropdown {
      background-color: #2d3748;
      border-color: #4a5568;
    }
    .mention-item {
      display: flex;
      flex-direction: column;
      width: 100%;
      text-align: left;
      padding: 0.5rem 0.75rem;
      border: none;
      background: none;
      cursor: pointer;
      font-size: 0.875rem;
      min-height: 44px;
      justify-content: center;
    }
    .mention-item:hover, .mention-item:focus {
      background-color: #edf2f7;
      outline: none;
    }
    .dark .mention-item:hover, .dark .mention-item:focus {
      background-color: #4a5568;
    }
    .mention-user-id {
      font-weight: 600;
      color: #2d3748;
    }
    .dark .mention-user-id {
      color: #e2e8f0;
    }
    .mention-display-name {
      font-size: 0.75rem;
      color: #718096;
    }

    /* ── Annotations panel ────────────────────────────────────────────────── */
    .annotation-item {
      background-color: #f7fafc;
      border-radius: 0.5rem;
      padding: 1rem;
      margin-bottom: 0.75rem;
      border-left: 3px solid #ecc94b;
    }
    .dark .annotation-item {
      background-color: #2d3748;
      border-left-color: #d69e2e;
    }
    .annotation-header {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      margin-bottom: 0.5rem;
      flex-wrap: wrap;
    }
    .annotation-type {
      font-size: 0.75rem;
      font-weight: 600;
      padding: 0.125rem 0.5rem;
      border-radius: 9999px;
      text-transform: capitalize;
    }
    .annotation-type--note {
      background-color: #DBEAFE;
      color: #1E3A8A;
    }
    .annotation-type--highlight {
      background-color: #FEF3C7;
      color: #92400E;
    }
    .annotation-type--underline {
      background-color: #D1FAE5;
      color: #065F46;
    }
    .annotation-type--strikethrough {
      background-color: #FEE2E2;
      color: #991B1B;
    }
    .dark .annotation-type--note {
      background-color: #1E3A8A;
      color: #DBEAFE;
    }
    .dark .annotation-type--highlight {
      background-color: #92400E;
      color: #FEF3C7;
    }
    .dark .annotation-type--underline {
      background-color: #065F46;
      color: #D1FAE5;
    }
    .dark .annotation-type--strikethrough {
      background-color: #991B1B;
      color: #FEE2E2;
    }
    .annotation-color-dot {
      display: inline-block;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      border: 1px solid rgba(0, 0, 0, 0.2);
    }
    .annotation-page {
      font-size: 0.75rem;
      color: #718096;
    }
    .annotation-content {
      color: #4a5568;
      font-size: 0.9375rem;
      line-height: 1.5;
      margin-bottom: 0.5rem;
      word-break: break-word;
    }
    .dark .annotation-content {
      color: #cbd5e0;
    }
    .annotation-meta {
      display: flex;
      gap: 0.75rem;
      font-size: 0.75rem;
      color: #718096;
      margin-bottom: 0.5rem;
    }
    .annotation-author {
      font-weight: 600;
    }
    .annotation-actions {
      display: flex;
      gap: 0.5rem;
    }
    .annotation-action-btn {
      background: none;
      border: 1px solid #e2e8f0;
      color: #718096;
      font-size: 0.75rem;
      padding: 0.25rem 0.5rem;
      border-radius: 0.25rem;
      cursor: pointer;
      min-height: 28px;
    }
    .annotation-action-btn:hover {
      background-color: #edf2f7;
      color: #2d3748;
    }
    .dark .annotation-action-btn {
      border-color: #4a5568;
      color: #a0aec0;
    }
    .dark .annotation-action-btn:hover {
      background-color: #4a5568;
      color: #e2e8f0;
    }
    .annotation-action-btn--danger:hover {
      background-color: #FEE2E2;
      color: #991B1B;
      border-color: #f56565;
    }
    .dark .annotation-action-btn--danger:hover {
      background-color: #742a2a;
      color: #feb2b2;
    }
    .annotation-textarea {
      width: 100%;
      border: 1px solid #e2e8f0;
      border-radius: 0.375rem;
      padding: 0.75rem;
      font-size: 0.875rem;
      resize: vertical;
      min-height: 60px;
      font-family: inherit;
    }
    .dark .annotation-textarea {
      background-color: #2d3748;
      border-color: #4a5568;
      color: #e2e8f0;
    }
    .annotation-textarea:focus {
      outline: none;
      border-color: #ecc94b;
      box-shadow: 0 0 0 2px rgba(236, 201, 75, 0.3);
    }
    .annotation-select {
      border: 1px solid #e2e8f0;
      border-radius: 0.375rem;
      padding: 0.5rem;
      font-size: 0.875rem;
      margin-top: 0.5rem;
      width: 100%;
    }
    .dark .annotation-select {
      background-color: #2d3748;
      border-color: #4a5568;
      color: #e2e8f0;
    }
    .annotation-submit-btn {
      background-color: #ecc94b;
      color: #744210;
      border: none;
      padding: 0.5rem 1rem;
      border-radius: 0.375rem;
      font-size: 0.875rem;
      cursor: pointer;
      font-weight: 600;
      margin-top: 0.5rem;
      min-height: 36px;
    }
    .annotation-submit-btn:hover {
      background-color: #d69e2e;
    }
    .annotation-cancel-btn {
      background-color: #e2e8f0;
      color: #4a5568;
      border: none;
      padding: 0.5rem 1rem;
      border-radius: 0.375rem;
      font-size: 0.875rem;
      cursor: pointer;
      margin-top: 0.5rem;
      margin-left: 0.5rem;
      min-height: 36px;
    }
    .dark .annotation-cancel-btn {
      background-color: #4a5568;
      color: #e2e8f0;
    }

    /* Annotation form layout */
    .annotation-form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0.75rem;
      margin-top: 0.75rem;
    }
    .annotation-form-grid .form-group {
      display: flex;
      flex-direction: column;
    }
    .annotation-form-grid label {
      font-size: 0.75rem;
      font-weight: 600;
      color: #4a5568;
      margin-bottom: 0.25rem;
    }
    .dark .annotation-form-grid label {
      color: #a0aec0;
    }
    .annotation-form-grid input,
    .annotation-form-grid select {
      border: 1px solid #e2e8f0;
      border-radius: 0.375rem;
      padding: 0.5rem;
      font-size: 0.875rem;
    }
    .dark .annotation-form-grid input,
    .dark .annotation-form-grid select {
      background-color: #2d3748;
      border-color: #4a5568;
      color: #e2e8f0;
    }

    /* ── Collaboration panels grid ────────────────────────────────────────── */
    .collab-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
    }
    @media (max-width: 768px) {
      .collab-grid {
        grid-template-columns: 1fr;
      }
    }
  </style>
{% endblock %}

{% block content %}
<div class="annotations-container">

  {% if error %}
  <div class="error-box"><strong>Error:</strong> {{ error }}</div>
  {% elif file %}

  <!-- ── Back + header ── -->
  <div style="display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem;flex-wrap:wrap;">
    <a href="/files/{{ file.id }}" style="display:inline-flex;align-items:center;gap:0.4rem;color:#3b82f6;font-weight:600;text-decoration:none;" aria-label="Back to File Summary">
      <i class="fas fa-arrow-left" aria-hidden="true"></i> Back to File Summary
    </a>
  </div>

  <div class="annotations-header">
    <div>
      <div class="annotations-title">
        <i class="fas fa-comments" aria-hidden="true" style="color:#10b981;margin-right:0.4rem;"></i>
        Comments &amp; Annotations
      </div>
      <div class="annotations-subtitle">{{ file.original_filename }}</div>
    </div>
  </div>

  <!-- ── PDF Viewer (EmbedPDF) ───────────────────────────────────────────── -->
  {% if is_pdf and (processed_file_exists or original_file_exists) %}
  <div class="pdf-viewer-card">
    <div class="pdf-viewer-card-header">
      <i class="fas fa-file-pdf" aria-hidden="true" style="color:#ef4444;"></i>
      Document Viewer
    </div>
    <div id="embedpdf-viewer" aria-label="PDF document viewer"></div>
  </div>
  {% endif %}

  <!-- ── Comments & Annotations ──────────────────────────────────────────── -->
  <div class="collab-card">
    <div class="collab-grid">
      <!-- Comments Panel -->
      <section class="comments-panel" aria-label="{{ _('comments.heading') }}">
        <div class="panel-header">
          <h3><i class="fas fa-comments" aria-hidden="true"></i> {{ _("comments.heading") }}</h3>
        </div>
        <div id="comments-list" aria-live="polite"></div>

        <!-- New comment form -->
        <div class="comment-form-wrapper">
          <form id="comment-form" aria-label="{{ _('comments.add_comment') }}">
            <div class="mention-dropdown-wrapper">
              <div id="mention-dropdown" class="hidden" role="listbox" aria-label="{{ _('comments.mention_users') }}"></div>
              <textarea
                id="comment-input"
                class="comment-textarea"
                placeholder="{{ _('comments.body_placeholder') }}"
                rows="3"
                aria-label="{{ _('comments.body_placeholder') }}"
                maxlength="10000"
              ></textarea>
            </div>
            <button type="submit" class="comment-submit-btn">
              <i class="fas fa-paper-plane" aria-hidden="true"></i> {{ _("comments.add_comment") }}
            </button>
          </form>
        </div>
      </section>

      <!-- Annotations Panel -->
      <section class="annotations-panel" aria-label="{{ _('annotations.heading') }}">
        <div class="panel-header">
          <h3><i class="fas fa-sticky-note" aria-hidden="true"></i> {{ _("annotations.heading") }}</h3>
        </div>
        <div id="annotations-list" aria-live="polite"></div>

        <!-- New annotation form -->
        <div class="comment-form-wrapper">
          <form id="annotation-form" aria-label="{{ _('annotations.add') }}">
            <textarea
              id="annotation-content-input"
              class="annotation-textarea"
              placeholder="{{ _('annotations.content_placeholder') }}"
              rows="2"
              aria-label="{{ _('annotations.content_placeholder') }}"
              maxlength="5000"
            ></textarea>
            <div class="annotation-form-grid">
              <div class="form-group">
                <label for="annotation-page-input">{{ _("annotations.page") }}</label>
                <input type="number" id="annotation-page-input" min="1" value="1" aria-label="{{ _('annotations.page') }}">
              </div>
              <div class="form-group">
                <label for="annotation-type-input">{{ _("annotations.type") }}</label>
                <select id="annotation-type-input" aria-label="Annotation type">
                  <option value="note">{{ _("annotations.type_note") }}</option>
                  <option value="highlight">{{ _("annotations.type_highlight") }}</option>
                  <option value="underline">{{ _("annotations.type_underline") }}</option>
                  <option value="strikethrough">{{ _("annotations.type_strikethrough") }}</option>
                </select>
              </div>
              <div class="form-group">
                <label for="annotation-color-input">{{ _("annotations.color") }}</label>
                <input type="color" id="annotation-color-input" value="#ffff00" aria-label="{{ _('annotations.color') }}">
              </div>
            </div>
            <button type="submit" class="annotation-submit-btn">
              <i class="fas fa-plus" aria-hidden="true"></i> {{ _("annotations.add") }}
            </button>
          </form>
        </div>
      </section>
    </div>
  </div>

  {% else %}
  <!-- file is None without error -->
  <div class="error-box">Document not found.</div>
  {% endif %}

</div>

<!-- Comments & Annotations JS -->
<script src="{{ url_for('static', path='js/comments.js') }}" defer></script>
<script src="{{ url_for('static', path='js/annotations.js') }}" defer></script>
<script>
  document.addEventListener('DOMContentLoaded', function () {
    {% if file %}
    var fileId = {{ file.id | tojson }};
    // Detect current user from whoami endpoint
    fetch('/api/auth/whoami')
      .then(function (r) { return r.json(); })
      .then(function (data) {
        var userId = (data && (data.email || data.preferred_username)) || '';
        var commentsI18n = {
          empty: {{ _("comments.empty") | tojson }},
          add_comment: {{ _("comments.add_comment") | tojson }},
          add_reply: {{ _("comments.add_reply") | tojson }},
          edit: {{ _("comments.edit") | tojson }},
          save: {{ _("comments.save") | tojson }},
          resolve: {{ _("comments.resolve") | tojson }},
          resolved: {{ _("comments.resolved") | tojson }},
          unresolve: {{ _("comments.unresolve") | tojson }},
          delete_confirm: {{ _("comments.delete_confirm") | tojson }},
          reply_placeholder: {{ _("comments.reply_placeholder") | tojson }},
          body_placeholder: {{ _("comments.body_placeholder") | tojson }},
          mention_users: {{ _("comments.mention_users") | tojson }},
          cancel: {{ _("common.cancel") | tojson }}
        };
        var annotationsI18n = {
          empty: {{ _("annotations.empty") | tojson }},
          add: {{ _("annotations.add") | tojson }},
          save: {{ _("annotations.save") | tojson }},
          delete_confirm: {{ _("annotations.delete_confirm") | tojson }},
          page: {{ _("annotations.page") | tojson }},
          color: {{ _("annotations.color") | tojson }},
          type_note: {{ _("annotations.type_note") | tojson }},
          type_highlight: {{ _("annotations.type_highlight") | tojson }},
          type_underline: {{ _("annotations.type_underline") | tojson }},
          type_strikethrough: {{ _("annotations.type_strikethrough") | tojson }},
          cancel: {{ _("common.cancel") | tojson }}
        };
        if (typeof initComments === 'function') {
          initComments(fileId, userId, commentsI18n);
        }
        if (typeof initAnnotations === 'function') {
          initAnnotations(fileId, userId, annotationsI18n);
        }
      })
      .catch(function () {
        // Auth disabled — initialise with empty user
        if (typeof initComments === 'function') initComments(fileId, '', {});
        if (typeof initAnnotations === 'function') initAnnotations(fileId, '', {});
      });
    {% endif %}
  });
</script>
<!-- ── EmbedPDF Viewer init ── -->
{% if file and is_pdf and (processed_file_exists or original_file_exists) %}
<script async type="module">
  import EmbedPDF from 'https://cdn.jsdelivr.net/npm/@embedpdf/snippet@2/dist/embedpdf.js';

  const viewerEl = document.getElementById('embedpdf-viewer');
  if (viewerEl) {
    {% if processed_file_exists %}
    const pdfUrl = '/api/files/{{ file.id }}/preview?version=processed';
    {% else %}
    const pdfUrl = '/api/files/{{ file.id }}/preview?version=original';
    {% endif %}

    EmbedPDF.init({
      type: 'container',
      target: viewerEl,
      src: pdfUrl,
    });
  }
</script>
{% endif %}
{% endblock %}