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

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

<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>

<!-- Import Filters Section -->
<div class="settings-container" style="margin-top: 1rem;">
  <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. Higher values allow more variations through.</p>
      </div>

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

    <div id="importStats" class="import-stats" style="margin-top: 1rem;">
      <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>

<!-- Filtered Deletion Section -->
<div class="settings-container" style="margin-top: 1rem;">
  <div class="settings-section">
    <h2>Delete Images by Tag</h2>
    <p class="settings-description">Permanently delete all images associated with a specific tag (e.g., remove an artist's entire collection).</p>

    <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" style="margin-top: 1rem;">
  <div class="settings-info">
    <p>Use these tools to manually trigger an import or reset the image database. Resetting the database does not delete the actual image files.</p>
  </div>
</div>

<style>
  .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);
  }
</style>

<script>
document.addEventListener('DOMContentLoaded', () => {
  // 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;
  });

  // 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');

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

    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');

    const r = await fetch('/api/delete-by-tag', { method: 'POST', body: fd });
    const data = await r.json();
    if (data.ok) {
      alert(`Successfully deleted ${data.deleted_count} images.${data.tag_deleted ? ' Tag was also deleted.' : ''}`);
      loadTagsForDeletion();
      document.getElementById('deletePreview').style.display = 'none';
      document.getElementById('confirmationGroup').style.display = 'none';
      document.getElementById('deleteConfirmInput').value = '';
      document.getElementById('deleteByTagBtn').disabled = true;
      selectedTagName = '';
    } else {
      alert('Failed to delete images: ' + (data.error || 'Unknown error'));
    }
  });

  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);
      });
    }
  }
});
</script>
{% endblock %}