{% extends "layout.html" %}
{% block title %}Settings{% endblock %}

{% block content %}
<h1 style="text-align:center; margin-top: 1rem;">Settings</h1>

<div class="settings-grid">
  <!-- Column 1: Info & Admin Actions -->
  <div class="settings-column">
    <div class="settings-container">
      <div class="settings-info">
        <h2>About These Tools</h2>
        <p>Use these tools to manage your image library. You can trigger imports, configure filters, and clean up unwanted images.</p>
        <p style="margin-top: 0.75rem;"><strong>Note:</strong> Resetting the database does not delete the actual image files from disk.</p>
      </div>
    </div>

    <div class="settings-container">
      <div class="settings-section">
        <h2>Admin Actions</h2>
        <div class="settings-actions">
          <form action="{{ url_for('main.trigger_image_import') }}" method="get">
            <button type="submit" class="btn primary-btn">Trigger Image Import</button>
          </form>

          <form action="{{ url_for('main.trigger_thumbnail_generation') }}" method="post" onsubmit="return confirm('Are you sure you want to regenerate all thumbnails?');">
            <button type="submit" class="btn warning-btn">Regenerate Thumbnails</button>
          </form>

          <form action="{{ url_for('main.reset_db') }}" method="post" onsubmit="return confirm('Are you sure you want to delete all image records? This action cannot be undone.');">
            <button type="submit" class="btn danger-btn">Reset Image Database</button>
          </form>
        </div>
      </div>
    </div>
  </div>

  <!-- Column 2: Import Filters -->
  <div class="settings-column">
    <div class="settings-container">
      <div class="settings-section">
        <h2>Import Filters</h2>
        <p class="settings-description">Configure filters to skip certain images during import.</p>

        <form id="importSettingsForm" class="form-card">
          <div class="form-group">
            <label class="form-label">Minimum Width (px)</label>
            <input type="number" id="minWidth" name="min_width" class="form-input" min="0" value="0" placeholder="0 = no minimum">
          </div>

          <div class="form-group">
            <label class="form-label">Minimum Height (px)</label>
            <input type="number" id="minHeight" name="min_height" class="form-input" min="0" value="0" placeholder="0 = no minimum">
          </div>

          <div class="form-group">
            <label class="form-label checkbox-label">
              <input type="checkbox" id="skipTransparent" name="skip_transparent">
              Skip mostly transparent images
            </label>
            <p class="form-help">Useful for filtering out UI elements, overlays, and buttons.</p>
          </div>

          <div class="form-group" id="transparencyThresholdGroup" style="display: none;">
            <label class="form-label">Transparency Threshold (%)</label>
            <input type="number" id="transparencyThreshold" name="transparency_threshold" class="form-input" min="50" max="100" value="90">
            <p class="form-help">Images with more than this % of transparent pixels will be skipped.</p>
          </div>

          <div class="form-group">
            <label class="form-label">Duplicate Detection Sensitivity</label>
            <select id="phashThreshold" name="phash_threshold" class="form-input">
              <option value="0">Disabled (import all images)</option>
              <option value="1">Strict (only exact visual matches)</option>
              <option value="2">Normal (slight variations filtered)</option>
              <option value="5">Loose (more variations allowed)</option>
              <option value="10">Very Loose (only obvious duplicates filtered)</option>
            </select>
            <p class="form-help">Controls how similar images must be to be considered duplicates.</p>
          </div>

          <button type="submit" class="btn primary-btn" style="width: 100%;">Save Filter Settings</button>
        </form>

        <div id="importStats" class="import-stats">
          <h3>Last Import Statistics</h3>
          <div class="stats-grid">
            <div class="stat-item">
              <span class="stat-value" id="statProcessed">-</span>
              <span class="stat-label">Processed</span>
            </div>
            <div class="stat-item">
              <span class="stat-value" id="statImported">-</span>
              <span class="stat-label">Imported</span>
            </div>
            <div class="stat-item">
              <span class="stat-value" id="statDimension">-</span>
              <span class="stat-label">Filtered (size)</span>
            </div>
            <div class="stat-item">
              <span class="stat-value" id="statTransparency">-</span>
              <span class="stat-label">Filtered (transparent)</span>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>

  <!-- Column 3: Deletion Tools -->
  <div class="settings-column">
    <div class="settings-container">
      <div class="settings-section">
        <h2>Delete Images by Tag</h2>
        <p class="settings-description">Permanently delete all images associated with a specific tag.</p>

        <div id="deleteByTagFeedback"></div>

        <form id="deleteByTagForm" class="form-card">
          <div class="form-group">
            <label class="form-label">Select Tag to Delete</label>
            <select id="deleteTagSelect" name="tag_id" class="form-input" required>
              <option value="">-- Select a tag --</option>
            </select>
          </div>

          <div id="deletePreview" class="delete-preview" style="display: none;">
            <p>This will permanently delete <strong id="deleteCount">0</strong> images and their files.</p>
          </div>

          <div class="form-group" id="confirmationGroup" style="display: none;">
            <label class="form-label">Type the tag name to confirm: <code id="confirmTagName"></code></label>
            <input type="text" id="deleteConfirmInput" class="form-input" placeholder="Type tag name here..." autocomplete="off">
            <p class="form-help">This action cannot be undone.</p>
          </div>

          <div class="form-group">
            <label class="form-label checkbox-label">
              <input type="checkbox" id="deleteTagAlso" name="delete_tag">
              Also delete the tag itself
            </label>
          </div>

          <button type="submit" class="btn danger-btn" style="width: 100%;" disabled id="deleteByTagBtn">Delete Images</button>
        </form>
      </div>
    </div>

    <div class="settings-container">
      <div class="settings-section">
        <h2>Clean Up Existing Images</h2>
        <p class="settings-description">Scan and remove images that don't meet filter criteria.</p>

        <div class="form-card">
          <div class="form-group">
            <label class="form-label">Filter Type</label>
            <select id="cleanupFilterType" class="form-input">
              <option value="transparency">Transparency (mostly transparent)</option>
              <option value="dimensions">Dimensions (below minimum size)</option>
            </select>
          </div>

          <div id="transparencyOptions">
            <div class="form-group">
              <label class="form-label">Transparency Threshold (%)</label>
              <input type="number" id="cleanupTransparencyThreshold" class="form-input" min="50" max="100" value="90">
              <p class="form-help">Images with more than this % transparent pixels will be flagged.</p>
            </div>
          </div>

          <div id="dimensionOptions" style="display: none;">
            <div class="form-group">
              <label class="form-label">Minimum Width (px)</label>
              <input type="number" id="cleanupMinWidth" class="form-input" min="0" value="0">
            </div>
            <div class="form-group">
              <label class="form-label">Minimum Height (px)</label>
              <input type="number" id="cleanupMinHeight" class="form-input" min="0" value="0">
            </div>
          </div>

          <button type="button" id="scanFilterBtn" class="btn primary-btn" style="width: 100%;">Scan for Matching Images</button>
        </div>

        <div id="cleanupResults" style="display: none; margin-top: 1rem;">
          <div class="import-stats">
            <h3>Scan Results</h3>
            <p><strong id="cleanupCount">0</strong> images match the filter criteria.</p>
          </div>

          <div id="cleanupPreview" class="cleanup-preview"></div>

          <div id="cleanupActions" style="display: none; margin-top: 1rem;">
            <div class="form-group">
              <label class="form-label checkbox-label">
                <input type="checkbox" id="cleanupSelectAll">
                Select all for deletion
              </label>
            </div>
            <p class="form-help" style="margin-bottom: 0.75rem;">Selected: <strong id="cleanupSelectedCount">0</strong> images</p>
            <button type="button" id="deleteSelectedBtn" class="btn danger-btn" style="width: 100%;" disabled>Delete Selected Images</button>
          </div>
        </div>
      </div>
    </div>
  </div>
</div><!-- end settings-grid -->

<!-- Duplicate Detection (Full Width) -->
<div class="settings-container" style="max-width: 1200px; margin: 2rem auto;">
  <div class="settings-section">
    <h2>Duplicate Detection</h2>
    <p class="settings-description">Scan for visually similar images using perceptual hash comparison. The first image in each group has the highest resolution and will be kept.</p>

    <div class="form-card" style="margin-bottom: 1rem;">
      <div class="form-group">
        <label class="form-label">Hamming Distance Threshold</label>
        <select id="dupThreshold" class="form-input">
          <option value="5">Strict (5) - Nearly identical</option>
          <option value="10" selected>Normal (10) - Minor variations</option>
          <option value="15">Loose (15) - Similar images</option>
          <option value="20">Very Loose (20) - Broadly similar</option>
        </select>
        <p class="form-help">Lower values find only very similar images. Higher values find more potential duplicates but may include false positives.</p>
      </div>

      <button type="button" id="scanDuplicatesBtn" class="btn primary-btn" style="width: 100%;">Scan for Duplicates</button>
    </div>

    <div id="dupResults" style="display: none;">
      <div class="import-stats" style="margin-bottom: 1rem;">
        <h3>Scan Results</h3>
        <p>Found <strong id="dupGroupCount">0</strong> group(s) of potential duplicates.</p>
      </div>

      <div id="dupGroups"></div>

      <div id="dupActions" style="margin-top: 1rem; display: none;">
        <p class="form-help" style="margin-bottom: 0.75rem;">
          Selected for deletion: <strong id="dupSelectedCount">0</strong> image(s)
          <span style="color: var(--text-muted);">(The highest resolution image in each group is protected)</span>
        </p>
        <button type="button" id="deleteDuplicatesBtn" class="btn danger-btn" disabled>Delete Selected Duplicates</button>
      </div>
    </div>
  </div>
</div>

<!-- Import Queue Status (Full Width) -->
<div class="settings-container" style="max-width: 1200px; margin: 2rem auto;">
  <div class="settings-section">
    <h2>Import Queue Status</h2>
    <p class="settings-description">Monitor and control the Celery-based import queue system.</p>

    <div id="queueStatusSection">
      <div class="stats-grid" style="grid-template-columns: repeat(6, 1fr);">
        <div class="stat-item">
          <span class="stat-value" id="queuePending">-</span>
          <span class="stat-label">Pending</span>
        </div>
        <div class="stat-item">
          <span class="stat-value" id="queueQueued">-</span>
          <span class="stat-label">Queued</span>
        </div>
        <div class="stat-item">
          <span class="stat-value" id="queueProcessing">-</span>
          <span class="stat-label">Processing</span>
        </div>
        <div class="stat-item">
          <span class="stat-value" id="queueComplete">-</span>
          <span class="stat-label">Complete</span>
        </div>
        <div class="stat-item">
          <span class="stat-value" id="queueSkipped">-</span>
          <span class="stat-label">Skipped</span>
        </div>
        <div class="stat-item">
          <span class="stat-value" id="queueFailed">-</span>
          <span class="stat-label">Failed</span>
        </div>
      </div>

      <div id="activeBatchInfo" class="import-stats" style="margin-top: 1rem; display: none;">
        <h3>Active Batch</h3>
        <p>Processing <strong id="batchDir">-</strong></p>
        <div class="batch-progress">
          <div class="progress-bar">
            <div class="progress-fill" id="batchProgressFill" style="width: 0%"></div>
          </div>
          <span id="batchProgressText">0 / 0</span>
        </div>
      </div>

      <div class="queue-actions" style="margin-top: 1rem; display: flex; gap: 0.75rem; flex-wrap: wrap;">
        <button id="triggerImportBtn" class="btn primary-btn">Trigger Import Scan</button>
        <button id="retryFailedBtn" class="btn warning-btn">Retry Failed Tasks</button>
        <button id="clearCompletedBtn" class="btn secondary-btn">Clear Completed</button>
        <button id="regenMissingThumbsBtn" class="btn secondary-btn">Regenerate Missing Thumbnails</button>
      </div>

      <div id="celeryWorkerInfo" style="margin-top: 1rem;">
        <p style="color: var(--text-muted); font-size: 0.85rem;">
          Workers: <strong id="workerCount">-</strong> |
          Active Tasks: <strong id="activeTasks">-</strong>
        </p>
      </div>
    </div>

    <!-- Recent Tasks Table -->
    <div id="recentTasksSection" style="margin-top: 1.5rem;">
      <h3>Recent Tasks</h3>
      <div class="tasks-table-wrapper" style="max-height: 300px; overflow-y: auto;">
        <table class="tasks-table">
          <thead>
            <tr>
              <th>File</th>
              <th>Type</th>
              <th>Status</th>
              <th>Error</th>
              <th>Time</th>
            </tr>
          </thead>
          <tbody id="recentTasksBody">
            <tr><td colspan="5" style="text-align: center; color: var(--text-muted);">Loading...</td></tr>
          </tbody>
        </table>
      </div>
    </div>
  </div>
</div>

<style>
  .tasks-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
  }
  .tasks-table th,
  .tasks-table td {
    padding: 0.5rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
  .tasks-table th {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-dim);
    font-weight: 500;
    position: sticky;
    top: 0;
  }
  .tasks-table td {
    color: var(--text);
  }
  .tasks-table .status-pending { color: #9ca3af; }
  .tasks-table .status-queued { color: #60a5fa; }
  .tasks-table .status-processing { color: #fbbf24; }
  .tasks-table .status-complete { color: #34d399; }
  .tasks-table .status-skipped { color: #a78bfa; }
  .tasks-table .status-failed { color: #f87171; }
  .batch-progress {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 0.5rem;
  }
  .progress-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
  }
  .progress-fill {
    height: 100%;
    background: var(--btn-primary);
    transition: width 0.3s ease;
  }
  .queue-actions .btn {
    min-width: auto;
    white-space: nowrap;
  }
  .settings-description {
    color: var(--text-muted);
    margin-bottom: 1rem;
    font-size: 0.9rem;
  }
  .form-help {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 0.25rem;
  }
  .checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
  }
  .checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--btn-primary);
  }
  .import-stats {
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    padding: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.08);
  }
  .import-stats h3 {
    margin: 0 0 0.75rem 0;
    font-size: 0.95rem;
    color: var(--text-dim);
  }
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }
  .stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 6px;
  }
  .stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
  }
  .stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
  }
  .delete-preview {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 6px;
    padding: 0.75rem;
    margin-bottom: 1rem;
    color: var(--flash-danger);
  }
  .cleanup-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 0.5rem;
    max-height: 400px;
    overflow-y: auto;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.08);
  }
  .cleanup-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 6px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.2s ease;
  }
  .cleanup-item.selected {
    border-color: var(--btn-danger);
  }
  .cleanup-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .cleanup-item .info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.75);
    padding: 0.25rem;
    font-size: 0.65rem;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .cleanup-item .check-overlay {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    border: 2px solid #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 12px;
  }
  .cleanup-item.selected .check-overlay {
    background: var(--btn-danger);
  }
  /* Feedback message styles */
  .feedback-message {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    animation: fadeInSlide 0.3s ease-out;
  }
  .feedback-message.success {
    background: rgba(34, 197, 94, 0.15);
    border: 1px solid rgba(34, 197, 94, 0.4);
    color: #22c55e;
  }
  .feedback-message.error {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #ef4444;
  }
  .feedback-message strong {
    color: inherit;
  }
  @keyframes fadeInSlide {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  /* Duplicate detection styles */
  .dup-group {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
  }
  .dup-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
  .dup-group-header h4 {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-dim);
  }
  .dup-group-images {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
  }
  .dup-image {
    position: relative;
    width: 150px;
    border-radius: 6px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color 0.2s ease;
  }
  .dup-image.selected {
    border-color: var(--btn-danger);
  }
  .dup-image.protected {
    border-color: var(--btn-primary);
    cursor: default;
  }
  .dup-image img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    display: block;
  }
  .dup-image-info {
    background: rgba(0, 0, 0, 0.75);
    padding: 0.35rem 0.5rem;
    font-size: 0.7rem;
    color: #fff;
  }
  .dup-image-info .resolution {
    font-weight: 600;
  }
  .dup-image-info .size {
    color: rgba(255, 255, 255, 0.7);
  }
  .dup-badge {
    position: absolute;
    top: 4px;
    left: 4px;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 600;
  }
  .dup-badge.keep {
    background: var(--btn-primary);
    color: #fff;
  }
  .dup-badge.delete {
    background: var(--btn-danger);
    color: #fff;
  }
</style>

<script>
document.addEventListener('DOMContentLoaded', () => {
  // ========================================
  // Celery Queue Status
  // ========================================
  async function loadQueueStatus() {
    try {
      const r = await fetch('/api/import/status');
      const data = await r.json();

      if (data.ok) {
        // Update status counts
        document.getElementById('queuePending').textContent = data.status_counts.pending || 0;
        document.getElementById('queueQueued').textContent = data.status_counts.queued || 0;
        document.getElementById('queueProcessing').textContent = data.status_counts.processing || 0;
        document.getElementById('queueComplete').textContent = data.status_counts.complete || 0;
        document.getElementById('queueSkipped').textContent = data.status_counts.skipped || 0;
        document.getElementById('queueFailed').textContent = data.status_counts.failed || 0;

        // Update active batch info
        const batchEl = document.getElementById('activeBatchInfo');
        if (data.active_batch) {
          batchEl.style.display = 'block';
          document.getElementById('batchDir').textContent = data.active_batch.source_directory;
          const processed = data.active_batch.processed_files || 0;
          const total = data.active_batch.total_files || 1;
          const pct = Math.round((processed / total) * 100);
          document.getElementById('batchProgressFill').style.width = pct + '%';
          document.getElementById('batchProgressText').textContent = `${processed} / ${total}`;
        } else {
          batchEl.style.display = 'none';
        }

        // Update recent tasks table
        const tbody = document.getElementById('recentTasksBody');
        if (data.recent_tasks && data.recent_tasks.length > 0) {
          tbody.innerHTML = data.recent_tasks.map(t => `
            <tr>
              <td title="${t.source_path || ''}">${t.source_path || '-'}</td>
              <td>${t.task_type || '-'}</td>
              <td class="status-${t.status}">${t.status || '-'}</td>
              <td title="${t.error_message || ''}">${t.error_message ? t.error_message.substring(0, 30) + '...' : '-'}</td>
              <td>${t.created_at ? new Date(t.created_at).toLocaleString() : '-'}</td>
            </tr>
          `).join('');
        } else {
          tbody.innerHTML = '<tr><td colspan="5" style="text-align: center; color: var(--text-muted);">No recent tasks</td></tr>';
        }
      }
    } catch (e) {
      console.error('Failed to load queue status:', e);
    }
  }

  async function loadCeleryStatus() {
    try {
      const r = await fetch('/api/celery/status');
      const data = await r.json();

      if (data.ok) {
        document.getElementById('workerCount').textContent = data.worker_count || 0;
        document.getElementById('activeTasks').textContent = data.active_tasks || 0;
      } else {
        document.getElementById('workerCount').textContent = '?';
        document.getElementById('activeTasks').textContent = '?';
      }
    } catch (e) {
      document.getElementById('workerCount').textContent = 'offline';
      document.getElementById('activeTasks').textContent = '-';
    }
  }

  // Load queue status on page load and refresh periodically
  loadQueueStatus();
  loadCeleryStatus();
  setInterval(loadQueueStatus, 5000);  // Refresh every 5 seconds
  setInterval(loadCeleryStatus, 10000);  // Refresh every 10 seconds

  // Trigger Import Scan
  document.getElementById('triggerImportBtn').addEventListener('click', async () => {
    const btn = document.getElementById('triggerImportBtn');
    btn.disabled = true;
    btn.textContent = 'Starting...';

    try {
      const r = await fetch('/api/import/trigger', { method: 'POST' });
      const data = await r.json();

      if (data.ok) {
        alert('Import scan started! Task ID: ' + data.task_id);
        loadQueueStatus();
      } else {
        alert('Failed to start import: ' + (data.error || 'Unknown error'));
      }
    } catch (e) {
      alert('Failed to start import: ' + e.message);
    } finally {
      btn.disabled = false;
      btn.textContent = 'Trigger Import Scan';
    }
  });

  // Retry Failed Tasks
  document.getElementById('retryFailedBtn').addEventListener('click', async () => {
    const btn = document.getElementById('retryFailedBtn');
    btn.disabled = true;
    btn.textContent = 'Retrying...';

    try {
      const r = await fetch('/api/import/retry-failed', { method: 'POST' });
      const data = await r.json();

      if (data.ok) {
        alert(`Retried ${data.retried} failed task(s).`);
        loadQueueStatus();
      } else {
        alert('Failed to retry: ' + (data.error || 'Unknown error'));
      }
    } catch (e) {
      alert('Failed to retry: ' + e.message);
    } finally {
      btn.disabled = false;
      btn.textContent = 'Retry Failed Tasks';
    }
  });

  // Clear Completed Tasks
  document.getElementById('clearCompletedBtn').addEventListener('click', async () => {
    const btn = document.getElementById('clearCompletedBtn');
    btn.disabled = true;
    btn.textContent = 'Clearing...';

    try {
      const r = await fetch('/api/import/clear-completed', { method: 'POST' });
      const data = await r.json();

      if (data.ok) {
        alert(`Cleared ${data.deleted} completed/skipped task(s).`);
        loadQueueStatus();
      } else {
        alert('Failed to clear: ' + (data.error || 'Unknown error'));
      }
    } catch (e) {
      alert('Failed to clear: ' + e.message);
    } finally {
      btn.disabled = false;
      btn.textContent = 'Clear Completed';
    }
  });

  // Regenerate Missing Thumbnails
  document.getElementById('regenMissingThumbsBtn').addEventListener('click', async () => {
    const btn = document.getElementById('regenMissingThumbsBtn');
    btn.disabled = true;
    btn.textContent = 'Starting...';

    try {
      const r = await fetch('/api/thumbnails/regenerate-missing', { method: 'POST' });
      const data = await r.json();

      if (data.ok) {
        alert('Missing thumbnail generation started! Task ID: ' + data.task_id);
      } else {
        alert('Failed to start: ' + (data.error || 'Unknown error'));
      }
    } catch (e) {
      alert('Failed to start: ' + e.message);
    } finally {
      btn.disabled = false;
      btn.textContent = 'Regenerate Missing Thumbnails';
    }
  });

  // Load import settings
  fetch('/api/import-settings')
    .then(r => r.json())
    .then(data => {
      if (data.ok) {
        document.getElementById('minWidth').value = data.settings.min_width || 0;
        document.getElementById('minHeight').value = data.settings.min_height || 0;
        document.getElementById('skipTransparent').checked = data.settings.skip_transparent || false;
        document.getElementById('transparencyThreshold').value = (data.settings.transparency_threshold || 0.9) * 100;
        document.getElementById('phashThreshold').value = data.settings.phash_threshold ?? 2;
        toggleTransparencyThreshold();
      }
    });

  // Load import stats
  fetch('/api/import-stats')
    .then(r => r.json())
    .then(data => {
      if (data.ok) {
        document.getElementById('statProcessed').textContent = data.stats.total_processed || 0;
        document.getElementById('statImported').textContent = data.stats.total_imported || 0;
        document.getElementById('statDimension').textContent = data.stats.filtered_by_dimension || 0;
        document.getElementById('statTransparency').textContent = data.stats.filtered_by_transparency || 0;
      }
    });

  // Load tags for deletion dropdown
  loadTagsForDeletion();

  // Toggle transparency threshold visibility
  document.getElementById('skipTransparent').addEventListener('change', toggleTransparencyThreshold);

  function toggleTransparencyThreshold() {
    const show = document.getElementById('skipTransparent').checked;
    document.getElementById('transparencyThresholdGroup').style.display = show ? 'block' : 'none';
  }

  // Save import settings
  document.getElementById('importSettingsForm').addEventListener('submit', async (e) => {
    e.preventDefault();
    const fd = new FormData();
    fd.append('min_width', document.getElementById('minWidth').value);
    fd.append('min_height', document.getElementById('minHeight').value);
    fd.append('skip_transparent', document.getElementById('skipTransparent').checked ? 'true' : 'false');
    fd.append('transparency_threshold', document.getElementById('transparencyThreshold').value / 100);
    fd.append('phash_threshold', document.getElementById('phashThreshold').value);

    const r = await fetch('/api/import-settings', { method: 'POST', body: fd });
    const data = await r.json();
    if (data.ok) {
      alert('Settings saved successfully!');
    } else {
      alert('Failed to save settings: ' + (data.error || 'Unknown error'));
    }
  });

  // Tag selection for deletion
  let selectedTagName = '';
  document.getElementById('deleteTagSelect').addEventListener('change', async (e) => {
    const tagId = e.target.value;
    const previewEl = document.getElementById('deletePreview');
    const countEl = document.getElementById('deleteCount');
    const confirmGroup = document.getElementById('confirmationGroup');
    const confirmInput = document.getElementById('deleteConfirmInput');
    const confirmTagName = document.getElementById('confirmTagName');
    const btn = document.getElementById('deleteByTagBtn');

    // Reset state
    confirmInput.value = '';
    btn.disabled = true;
    selectedTagName = '';

    if (!tagId) {
      previewEl.style.display = 'none';
      confirmGroup.style.display = 'none';
      return;
    }

    const r = await fetch(`/api/tag/${tagId}/image-count`);
    const data = await r.json();
    if (data.ok) {
      countEl.textContent = data.count;
      selectedTagName = data.tag_name;
      confirmTagName.textContent = selectedTagName;
      previewEl.style.display = 'block';
      confirmGroup.style.display = data.count > 0 ? 'block' : 'none';
    }
  });

  // Enable delete button only when confirmation matches
  document.getElementById('deleteConfirmInput').addEventListener('input', (e) => {
    const btn = document.getElementById('deleteByTagBtn');
    const typed = e.target.value.trim();
    btn.disabled = typed !== selectedTagName;
  });

  // Helper to show feedback message
  function showDeleteByTagFeedback(message, isSuccess) {
    const feedbackEl = document.getElementById('deleteByTagFeedback');
    feedbackEl.innerHTML = `<div class="feedback-message ${isSuccess ? 'success' : 'error'}">${message}</div>`;
    // Scroll feedback into view
    feedbackEl.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
  }

  function clearDeleteByTagFeedback() {
    document.getElementById('deleteByTagFeedback').innerHTML = '';
  }

  // Delete by tag form
  document.getElementById('deleteByTagForm').addEventListener('submit', async (e) => {
    e.preventDefault();
    const tagId = document.getElementById('deleteTagSelect').value;
    const deleteTag = document.getElementById('deleteTagAlso').checked;
    const count = document.getElementById('deleteCount').textContent;
    const confirmInput = document.getElementById('deleteConfirmInput');
    const btn = document.getElementById('deleteByTagBtn');
    const previewEl = document.getElementById('deletePreview');

    // Clear any previous feedback
    clearDeleteByTagFeedback();

    // Double-check confirmation matches (defense in depth)
    if (confirmInput.value.trim() !== selectedTagName) {
      showDeleteByTagFeedback('Tag name confirmation does not match.', false);
      return;
    }

    // Show loading state
    const originalBtnText = btn.textContent;
    btn.disabled = true;
    btn.textContent = 'Deleting...';

    const fd = new FormData();
    fd.append('tag_id', tagId);
    fd.append('tag_name', selectedTagName);  // Server validates this matches the ID
    fd.append('delete_tag', deleteTag ? 'true' : 'false');

    try {
      const r = await fetch('/api/delete-by-tag', { method: 'POST', body: fd });
      const data = await r.json();

      if (data.ok) {
        // Show success message in the dedicated feedback area
        let successMsg = `Successfully deleted <strong>${data.deleted_count}</strong> image(s).`;
        if (data.tag_deleted) successMsg += ' Tag was also deleted.';
        if (data.errors && data.errors.length > 0) {
          successMsg += `<br><small>Some errors occurred: ${data.errors.join(', ')}</small>`;
        }
        showDeleteByTagFeedback(successMsg, true);

        // Reload tag list
        await loadTagsForDeletion();

        // Reset form immediately since feedback is now in a separate area
        document.getElementById('deleteTagSelect').value = '';
        previewEl.style.display = 'none';
        document.getElementById('confirmationGroup').style.display = 'none';
        confirmInput.value = '';
        document.getElementById('deleteTagAlso').checked = false;
        selectedTagName = '';
        btn.textContent = originalBtnText;
      } else {
        // Show error in feedback area
        showDeleteByTagFeedback(`Failed to delete images: <strong>${data.error || 'Unknown error'}</strong>`, false);
        btn.disabled = false;
        btn.textContent = originalBtnText;
      }
    } catch (err) {
      // Network or parsing error
      showDeleteByTagFeedback(`Request failed: <strong>${err.message}</strong>`, false);
      btn.disabled = false;
      btn.textContent = originalBtnText;
    }
  });

  async function loadTagsForDeletion() {
    const select = document.getElementById('deleteTagSelect');
    select.innerHTML = '<option value="">-- Select a tag --</option>';

    // Get all tags (with IDs) from the API
    const r = await fetch('/api/tags/search?limit=500');
    const data = await r.json();
    if (data.tags) {
      // Group by kind
      const grouped = {};
      data.tags.forEach(t => {
        const kind = t.kind || 'user';
        if (!grouped[kind]) grouped[kind] = [];
        grouped[kind].push(t);
      });

      // Add to select with optgroups
      Object.keys(grouped).sort().forEach(kind => {
        const optgroup = document.createElement('optgroup');
        optgroup.label = kind.charAt(0).toUpperCase() + kind.slice(1) + ' Tags';
        grouped[kind].sort((a, b) => a.name.localeCompare(b.name)).forEach(tag => {
          const opt = document.createElement('option');
          opt.value = tag.id;  // Use tag ID as value
          opt.textContent = tag.name;
          optgroup.appendChild(opt);
        });
        select.appendChild(optgroup);
      });
    }
  }

  // ========================================
  // Image Cleanup / Filter Tool
  // ========================================
  let cleanupImages = [];
  let selectedForDeletion = new Set();

  // Toggle filter options visibility
  document.getElementById('cleanupFilterType').addEventListener('change', () => {
    const type = document.getElementById('cleanupFilterType').value;
    document.getElementById('transparencyOptions').style.display = type === 'transparency' ? 'block' : 'none';
    document.getElementById('dimensionOptions').style.display = type === 'dimensions' ? 'block' : 'none';
    // Reset results when changing filter type
    document.getElementById('cleanupResults').style.display = 'none';
    cleanupImages = [];
    selectedForDeletion.clear();
  });

  // Scan for filterable images
  document.getElementById('scanFilterBtn').addEventListener('click', async () => {
    const btn = document.getElementById('scanFilterBtn');
    const filterType = document.getElementById('cleanupFilterType').value;
    btn.disabled = true;
    btn.textContent = 'Scanning...';

    let url = `/api/filter-scan?filter_type=${filterType}&limit=100`;

    if (filterType === 'transparency') {
      const threshold = document.getElementById('cleanupTransparencyThreshold').value / 100;
      url += `&threshold=${threshold}`;
    } else {
      const minWidth = document.getElementById('cleanupMinWidth').value || 0;
      const minHeight = document.getElementById('cleanupMinHeight').value || 0;
      url += `&min_width=${minWidth}&min_height=${minHeight}`;
    }

    try {
      const r = await fetch(url);
      const data = await r.json();

      if (data.ok) {
        cleanupImages = data.images;
        selectedForDeletion.clear();
        renderCleanupResults();
      } else {
        alert('Scan failed: ' + (data.error || 'Unknown error'));
      }
    } catch (e) {
      alert('Scan failed: ' + e.message);
    } finally {
      btn.disabled = false;
      btn.textContent = 'Scan for Matching Images';
    }
  });

  function renderCleanupResults() {
    const resultsEl = document.getElementById('cleanupResults');
    const countEl = document.getElementById('cleanupCount');
    const previewEl = document.getElementById('cleanupPreview');
    const actionsEl = document.getElementById('cleanupActions');
    const filterType = document.getElementById('cleanupFilterType').value;

    countEl.textContent = cleanupImages.length;
    resultsEl.style.display = 'block';

    if (cleanupImages.length === 0) {
      previewEl.innerHTML = '<p style="text-align: center; color: var(--text-muted); padding: 1rem;">No images match the filter criteria.</p>';
      actionsEl.style.display = 'none';
      return;
    }

    actionsEl.style.display = 'block';

    previewEl.innerHTML = cleanupImages.map(img => {
      const info = filterType === 'dimensions'
        ? `${img.width}x${img.height}`
        : img.filename.substring(0, 15);
      return `
        <div class="cleanup-item" data-id="${img.id}">
          <img src="${img.thumb_url}" alt="${img.filename}" loading="lazy">
          <div class="info">${info}</div>
          <div class="check-overlay"></div>
        </div>
      `;
    }).join('');

    // Add click handlers for selection
    previewEl.querySelectorAll('.cleanup-item').forEach(item => {
      item.addEventListener('click', () => {
        const id = parseInt(item.dataset.id);
        if (selectedForDeletion.has(id)) {
          selectedForDeletion.delete(id);
          item.classList.remove('selected');
        } else {
          selectedForDeletion.add(id);
          item.classList.add('selected');
        }
        updateSelectedCount();
      });
    });

    updateSelectedCount();
  }

  function updateSelectedCount() {
    const countEl = document.getElementById('cleanupSelectedCount');
    const btn = document.getElementById('deleteSelectedBtn');
    const selectAllEl = document.getElementById('cleanupSelectAll');

    countEl.textContent = selectedForDeletion.size;
    btn.disabled = selectedForDeletion.size === 0;

    // Update select all checkbox state
    selectAllEl.checked = selectedForDeletion.size === cleanupImages.length && cleanupImages.length > 0;
    selectAllEl.indeterminate = selectedForDeletion.size > 0 && selectedForDeletion.size < cleanupImages.length;
  }

  // Select all toggle
  document.getElementById('cleanupSelectAll').addEventListener('change', (e) => {
    const checked = e.target.checked;
    const previewEl = document.getElementById('cleanupPreview');

    cleanupImages.forEach(img => {
      if (checked) {
        selectedForDeletion.add(img.id);
      } else {
        selectedForDeletion.delete(img.id);
      }
    });

    previewEl.querySelectorAll('.cleanup-item').forEach(item => {
      item.classList.toggle('selected', checked);
    });

    updateSelectedCount();
  });

  // Delete selected images
  document.getElementById('deleteSelectedBtn').addEventListener('click', async () => {
    if (selectedForDeletion.size === 0) return;

    const confirmMsg = `Are you sure you want to permanently delete ${selectedForDeletion.size} image(s)? This cannot be undone.`;
    if (!confirm(confirmMsg)) return;

    const btn = document.getElementById('deleteSelectedBtn');
    btn.disabled = true;
    btn.textContent = 'Deleting...';

    const fd = new FormData();
    fd.append('image_ids', Array.from(selectedForDeletion).join(','));
    fd.append('confirm', 'true');

    try {
      const r = await fetch('/api/filter-delete', { method: 'POST', body: fd });
      const data = await r.json();

      if (data.ok) {
        alert(`Successfully deleted ${data.deleted_count} image(s).`);
        // Remove deleted images from the list
        cleanupImages = cleanupImages.filter(img => !selectedForDeletion.has(img.id));
        selectedForDeletion.clear();
        renderCleanupResults();
      } else {
        alert('Delete failed: ' + (data.error || 'Unknown error'));
      }
    } catch (e) {
      alert('Delete failed: ' + e.message);
    } finally {
      btn.disabled = false;
      btn.textContent = 'Delete Selected Images';
    }
  });

  // ========================================
  // Duplicate Detection
  // ========================================
  let duplicateGroups = [];
  let selectedDuplicates = new Set();

  function formatFileSize(bytes) {
    if (bytes < 1024) return bytes + ' B';
    if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB';
    return (bytes / (1024 * 1024)).toFixed(1) + ' MB';
  }

  document.getElementById('scanDuplicatesBtn').addEventListener('click', async () => {
    const btn = document.getElementById('scanDuplicatesBtn');
    const threshold = document.getElementById('dupThreshold').value;

    btn.disabled = true;
    btn.textContent = 'Scanning...';

    const fd = new FormData();
    fd.append('threshold', threshold);
    fd.append('limit', '50');

    try {
      const r = await fetch('/api/duplicates/scan', { method: 'POST', body: fd });
      const data = await r.json();

      if (data.ok) {
        duplicateGroups = data.groups;
        selectedDuplicates.clear();
        renderDuplicateResults();
      } else {
        alert('Scan failed: ' + (data.error || 'Unknown error'));
      }
    } catch (e) {
      alert('Scan failed: ' + e.message);
    } finally {
      btn.disabled = false;
      btn.textContent = 'Scan for Duplicates';
    }
  });

  function renderDuplicateResults() {
    const resultsEl = document.getElementById('dupResults');
    const countEl = document.getElementById('dupGroupCount');
    const groupsEl = document.getElementById('dupGroups');
    const actionsEl = document.getElementById('dupActions');

    countEl.textContent = duplicateGroups.length;
    resultsEl.style.display = 'block';

    if (duplicateGroups.length === 0) {
      groupsEl.innerHTML = '<p style="text-align: center; color: var(--text-muted); padding: 1rem;">No duplicate images found.</p>';
      actionsEl.style.display = 'none';
      return;
    }

    actionsEl.style.display = 'block';

    // Auto-select all non-first images for deletion
    duplicateGroups.forEach((group, groupIdx) => {
      group.forEach((img, imgIdx) => {
        if (imgIdx > 0) {
          selectedDuplicates.add(img.id);
        }
      });
    });

    groupsEl.innerHTML = duplicateGroups.map((group, groupIdx) => `
      <div class="dup-group" data-group="${groupIdx}">
        <div class="dup-group-header">
          <h4>Group ${groupIdx + 1} (${group.length} images)</h4>
          <button type="button" class="btn secondary-btn btn-sm" onclick="toggleGroupSelection(${groupIdx})">Toggle Selection</button>
        </div>
        <div class="dup-group-images">
          ${group.map((img, imgIdx) => `
            <div class="dup-image ${imgIdx === 0 ? 'protected' : 'selected'}"
                 data-id="${img.id}"
                 data-group="${groupIdx}"
                 data-protected="${imgIdx === 0}">
              <img src="${img.thumb_url}" alt="${img.filename}" loading="lazy">
              <span class="dup-badge ${imgIdx === 0 ? 'keep' : 'delete'}">${imgIdx === 0 ? 'KEEP' : 'DELETE'}</span>
              <div class="dup-image-info">
                <div class="resolution">${img.width}x${img.height}</div>
                <div class="size">${formatFileSize(img.file_size)}</div>
              </div>
            </div>
          `).join('')}
        </div>
      </div>
    `).join('');

    // Add click handlers
    groupsEl.querySelectorAll('.dup-image:not(.protected)').forEach(item => {
      item.addEventListener('click', () => {
        const id = parseInt(item.dataset.id);
        const badge = item.querySelector('.dup-badge');

        if (selectedDuplicates.has(id)) {
          selectedDuplicates.delete(id);
          item.classList.remove('selected');
          badge.textContent = 'KEEP';
          badge.classList.remove('delete');
          badge.classList.add('keep');
        } else {
          selectedDuplicates.add(id);
          item.classList.add('selected');
          badge.textContent = 'DELETE';
          badge.classList.remove('keep');
          badge.classList.add('delete');
        }
        updateDupSelectedCount();
      });
    });

    updateDupSelectedCount();
  }

  window.toggleGroupSelection = function(groupIdx) {
    const group = duplicateGroups[groupIdx];
    const groupEl = document.querySelector(`.dup-group[data-group="${groupIdx}"]`);

    // Check if any non-protected images are selected
    const nonProtected = group.slice(1);
    const allSelected = nonProtected.every(img => selectedDuplicates.has(img.id));

    nonProtected.forEach(img => {
      const itemEl = groupEl.querySelector(`.dup-image[data-id="${img.id}"]`);
      const badge = itemEl.querySelector('.dup-badge');

      if (allSelected) {
        selectedDuplicates.delete(img.id);
        itemEl.classList.remove('selected');
        badge.textContent = 'KEEP';
        badge.classList.remove('delete');
        badge.classList.add('keep');
      } else {
        selectedDuplicates.add(img.id);
        itemEl.classList.add('selected');
        badge.textContent = 'DELETE';
        badge.classList.remove('keep');
        badge.classList.add('delete');
      }
    });

    updateDupSelectedCount();
  };

  function updateDupSelectedCount() {
    const countEl = document.getElementById('dupSelectedCount');
    const btn = document.getElementById('deleteDuplicatesBtn');

    countEl.textContent = selectedDuplicates.size;
    btn.disabled = selectedDuplicates.size === 0;
  }

  document.getElementById('deleteDuplicatesBtn').addEventListener('click', async () => {
    if (selectedDuplicates.size === 0) return;

    const confirmMsg = `Are you sure you want to permanently delete ${selectedDuplicates.size} duplicate image(s)? This cannot be undone.`;
    if (!confirm(confirmMsg)) return;

    const btn = document.getElementById('deleteDuplicatesBtn');
    btn.disabled = true;
    btn.textContent = 'Deleting...';

    try {
      const r = await fetch('/api/duplicates/delete', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ image_ids: Array.from(selectedDuplicates) })
      });
      const data = await r.json();

      if (data.ok) {
        alert(`Successfully deleted ${data.deleted_count} duplicate image(s).`);

        // Remove deleted images from groups
        duplicateGroups = duplicateGroups.map(group =>
          group.filter(img => !selectedDuplicates.has(img.id))
        ).filter(group => group.length > 1);  // Remove groups with only 1 image left

        selectedDuplicates.clear();
        renderDuplicateResults();
      } else {
        alert('Delete failed: ' + (data.error || 'Unknown error'));
      }
    } catch (e) {
      alert('Delete failed: ' + e.message);
    } finally {
      btn.disabled = false;
      btn.textContent = 'Delete Selected Duplicates';
    }
  });
});
</script>
{% endblock %}