/**
 * FeatureLens — Visual Feedback & AI Task Staging Overlay
 * Zero-dependency Web Component with Shadow DOM Isolation & Mobile Touch Ergonomics
 */
class FeatureLensElement extends HTMLElement {
  constructor() {
    super();
    this.attachShadow({ mode: 'open' });
    this.isOpen = false;
    this.isInspectMode = false;
    this.notes = [];
    this.currentTarget = null;
    this.hoverOverlay = null;
    this.raycaster = null;
    this.mouse = null;
  }

  connectedCallback() {
    this.render();
    this.initInspector();
    this.loadNotes();
    this.setupGlobalEvents();
  }

  setupGlobalEvents() {
    window.addEventListener('featurelens:toggle', () => this.toggleDrawer());
  }

  async loadNotes() {
    try {
      const res = await fetch('/api/notes');
      if (res.ok) {
        this.notes = await res.json();
        this.updateBadge();
        this.renderNotesList();
      }
    } catch (err) {
      console.warn('[FeatureLens] Backend unreachable, using memory cache:', err);
    }
  }

  updateBadge() {
    const badge = this.shadowRoot.querySelector('#fl-badge');
    if (badge) {
      const openCount = this.notes.filter(n => n.status === 'open').length;
      badge.textContent = openCount;
      badge.style.display = openCount > 0 ? 'inline-block' : 'none';
    }
  }

  toggleDrawer(forceState) {
    this.isOpen = typeof forceState === 'boolean' ? forceState : !this.isOpen;
    const drawer = this.shadowRoot.querySelector('#fl-drawer');
    const activator = this.shadowRoot.querySelector('#fl-activator');
    if (drawer) {
      if (this.isOpen) {
        drawer.classList.add('open');
        activator.classList.add('active');
        this.loadNotes();
      } else {
        drawer.classList.remove('open');
        activator.classList.remove('active');
        this.stopInspectMode();
      }
    }
  }

  // -------------------------------------------------------------
  // Visual Inspector (2D DOM & 3D Three.js Touch/Pointer Engine)
  // -------------------------------------------------------------
  initInspector() {
    this.hoverOverlay = document.createElement('div');
    this.hoverOverlay.id = 'fl-hover-highlight';
    this.hoverOverlay.style.cssText = `
      position: absolute;
      pointer-events: none;
      border: 2px solid #06b6d4;
      background: rgba(6, 182, 212, 0.15);
      z-index: 999998;
      display: none;
      transition: all 0.05s ease-out;
      border-radius: 4px;
      box-shadow: 0 0 12px rgba(6, 182, 212, 0.5);
    `;
    document.body.appendChild(this.hoverOverlay);

    if (window.THREE) {
      this.raycaster = new THREE.Raycaster();
      this.mouse = new THREE.Vector2();
    }
  }

  startInspectMode() {
    this.isInspectMode = true;
    this.toggleDrawer(false);
    
    const banner = document.createElement('div');
    banner.id = 'fl-inspect-banner';
    banner.style.cssText = `
      position: fixed;
      top: 1rem;
      left: 50%;
      transform: translateX(-50%);
      background: #0f172a;
      border: 1px solid #06b6d4;
      color: #38bdf8;
      padding: 0.5rem 1rem;
      border-radius: 9999px;
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.775rem;
      font-weight: 700;
      box-shadow: 0 10px 25px rgba(0,0,0,0.8);
      z-index: 999999;
      display: flex;
      align-items: center;
      gap: 0.5rem;
      cursor: pointer;
      max-width: 90vw;
      box-sizing: border-box;
      text-align: center;
      justify-content: center;
    `;
    banner.innerHTML = `<span>🎯 Tap any 2D UI element or 3D CAD part</span> <span style="color:#ef4444; margin-left:0.5rem;">[Cancel]</span>`;
    banner.onclick = () => this.stopInspectMode();
    document.body.appendChild(banner);

    this._onPointerMove = this.handlePointerMove.bind(this);
    this._onPointerClick = this.handlePointerClick.bind(this);
    this._onKeyDown = (e) => { if (e.key === 'Escape') this.stopInspectMode(); };

    window.addEventListener('mousemove', this._onPointerMove, true);
    window.addEventListener('touchmove', this._onPointerMove, { passive: false, capture: true });
    window.addEventListener('click', this._onPointerClick, true);
    window.addEventListener('touchend', this._onPointerClick, { passive: false, capture: true });
    window.addEventListener('keydown', this._onKeyDown, true);
  }

  stopInspectMode() {
    this.isInspectMode = false;
    if (this.hoverOverlay) this.hoverOverlay.style.display = 'none';
    const banner = document.getElementById('fl-inspect-banner');
    if (banner) banner.remove();

    window.removeEventListener('mousemove', this._onPointerMove, true);
    window.removeEventListener('touchmove', this._onPointerMove, { passive: false, capture: true });
    window.removeEventListener('click', this._onPointerClick, true);
    window.removeEventListener('touchend', this._onPointerClick, { passive: false, capture: true });
    window.removeEventListener('keydown', this._onKeyDown, true);
  }

  getPointerCoords(e) {
    if (e.touches && e.touches.length > 0) {
      return { clientX: e.touches[0].clientX, clientY: e.touches[0].clientY, target: document.elementFromPoint(e.touches[0].clientX, e.touches[0].clientY) };
    }
    if (e.changedTouches && e.changedTouches.length > 0) {
      return { clientX: e.changedTouches[0].clientX, clientY: e.changedTouches[0].clientY, target: document.elementFromPoint(e.changedTouches[0].clientX, e.changedTouches[0].clientY) };
    }
    return { clientX: e.clientX, clientY: e.clientY, target: e.target };
  }

  handlePointerMove(e) {
    if (!this.isInspectMode) return;
    const { clientX, clientY, target } = this.getPointerCoords(e);
    if (!target) return;

    // Check if hovering 3D canvas
    if (window.scene && window.camera && target.tagName === 'CANVAS' && this.raycaster) {
      const rect = target.getBoundingClientRect();
      this.mouse.x = ((clientX - rect.left) / rect.width) * 2 - 1;
      this.mouse.y = -((clientY - rect.top) / rect.height) * 2 + 1;
      this.raycaster.setFromCamera(this.mouse, window.camera);

      const intersects = this.raycaster.intersectObjects(window.scene.children, true);
      if (intersects.length > 0) {
        this.hoverOverlay.style.display = 'none';
        return;
      }
    }

    // 2D Element highlight
    if (target && target !== this.hoverOverlay && !target.closest('feature-lens')) {
      const rect = target.getBoundingClientRect();
      this.hoverOverlay.style.display = 'block';
      this.hoverOverlay.style.top = `${rect.top + window.scrollY}px`;
      this.hoverOverlay.style.left = `${rect.left + window.scrollX}px`;
      this.hoverOverlay.style.width = `${rect.width}px`;
      this.hoverOverlay.style.height = `${rect.height}px`;
    }
  }

  handlePointerClick(e) {
    if (!this.isInspectMode) return;
    if (e.cancelable) e.preventDefault();
    e.stopPropagation();

    const { clientX, clientY, target } = this.getPointerCoords(e);
    if (!target) return;

    let targetType = 'dom_element';
    let targetSelector = '';
    let partId = null;
    let coords3d = null;

    // 3D Intersect check
    if (window.scene && window.camera && target.tagName === 'CANVAS' && this.raycaster) {
      const rect = target.getBoundingClientRect();
      this.mouse.x = ((clientX - rect.left) / rect.width) * 2 - 1;
      this.mouse.y = -((clientY - rect.top) / rect.height) * 2 + 1;
      this.raycaster.setFromCamera(this.mouse, window.camera);

      const intersects = this.raycaster.intersectObjects(window.scene.children, true);
      if (intersects.length > 0) {
        const hit = intersects[0];
        targetType = '3d_mesh';
        partId = hit.object.userData?.partId || hit.object.name || 'chassis-part';
        coords3d = {
          x: parseFloat(hit.point.x.toFixed(2)),
          y: parseFloat(hit.point.y.toFixed(2)),
          z: parseFloat(hit.point.z.toFixed(2))
        };
      }
    }

    if (targetType === 'dom_element') {
      targetSelector = this.computeSelectorPath(target);
    }

    this.currentTarget = {
      type: targetType,
      selector: targetSelector,
      partId: partId,
      coords3d: coords3d,
      route: window.location.pathname + window.location.hash
    };

    this.stopInspectMode();
    this.toggleDrawer(true);
    this.openCreateForm();
  }

  computeSelectorPath(el) {
    if (!el || el === document.body || el === document.documentElement) return 'body';
    if (el.id) return `#${el.id}`;
    if (el.className && typeof el.className === 'string') {
      const classes = el.className.trim().split(/\s+/).slice(0, 2).join('.');
      if (classes) return `${el.tagName.toLowerCase()}.${classes}`;
    }
    return `${el.tagName.toLowerCase()}`;
  }

  // -------------------------------------------------------------
  // AI Prompt Formatter
  // -------------------------------------------------------------
  generateAiPrompt(note) {
    const suggestedFiles = note.suggested_files && note.suggested_files.length > 0
      ? note.suggested_files.join(', ')
      : 'viewer/index.html, src/routes/notes.ts';

    let targetDesc = `DOM Element: \`${note.target_selector || 'Global View'}\``;
    if (note.target_type === '3d_mesh') {
      targetDesc = `3D Mesh Part: \`${note.part_id}\` (Coords: X:${note.coordinates_3d?.x || 0}, Y:${note.coordinates_3d?.y || 0}, Z:${note.coordinates_3d?.z || 0})`;
    }

    return `<USER_REQUEST>
Feature Target: [${note.title}]
Category: ${note.category?.toUpperCase()} | Priority: ${note.priority?.toUpperCase()} | Status: ${note.status?.toUpperCase()}
Target Element: ${targetDesc}
Route: ${note.route || window.location.pathname}

Task / Improvement Specification:
${note.description}

Technical Context & Candidate Source Files:
- Location / Route: ${note.route}
- Target Type: ${note.target_type}
- Suggested Relevant Files: ${suggestedFiles}
- Environment: 6U Tri-Mode Storage Array (Deno/Hono/Postgres + Three.js WebGL)
</USER_REQUEST>`;
  }

  async copyAiPrompt(noteId) {
    const note = this.notes.find(n => n.id === noteId);
    if (!note) return;
    const promptText = this.generateAiPrompt(note);
    try {
      await navigator.clipboard.writeText(promptText);
      alert('✅ AI Task Prompt copied to clipboard! Paste it directly into your AI assistant.');
    } catch (err) {
      console.warn('Clipboard write failed, showing text box:', err);
      prompt('Copy your AI task prompt:', promptText);
    }
  }

  // -------------------------------------------------------------
  // Note CRUD Actions
  // -------------------------------------------------------------
  openCreateForm() {
    const formContainer = this.shadowRoot.querySelector('#fl-form-container');
    const listContainer = this.shadowRoot.querySelector('#fl-list-container');
    if (formContainer && listContainer) {
      formContainer.style.display = 'block';
      listContainer.style.display = 'none';

      const targetLabel = this.shadowRoot.querySelector('#fl-target-label');
      if (targetLabel) {
        if (this.currentTarget?.type === '3d_mesh') {
          targetLabel.innerHTML = `🎯 3D Mesh: <strong>${this.currentTarget.partId}</strong> (X:${this.currentTarget.coords3d.x}, Y:${this.currentTarget.coords3d.y}, Z:${this.currentTarget.coords3d.z})`;
        } else if (this.currentTarget?.selector) {
          targetLabel.innerHTML = `🎯 2D Element: <code>${this.currentTarget.selector}</code>`;
        } else {
          targetLabel.innerHTML = `🌐 Global App Scope`;
        }
      }
    }
  }

  closeCreateForm() {
    const formContainer = this.shadowRoot.querySelector('#fl-form-container');
    const listContainer = this.shadowRoot.querySelector('#fl-list-container');
    if (formContainer && listContainer) {
      formContainer.style.display = 'none';
      listContainer.style.display = 'block';
      this.currentTarget = null;
    }
  }

  async saveNote() {
    const titleInput = this.shadowRoot.querySelector('#fl-title-input');
    const descInput = this.shadowRoot.querySelector('#fl-desc-input');
    const catSelect = this.shadowRoot.querySelector('#fl-cat-select');
    const prioSelect = this.shadowRoot.querySelector('#fl-prio-select');

    if (!titleInput || !titleInput.value.trim()) {
      alert('Please enter a note title.');
      return;
    }

    let suggestedFiles = ['viewer/index.html'];
    if (this.currentTarget?.type === '3d_mesh') {
      suggestedFiles.push('viewer/index.html#threejs-cad', 'mechanical/');
    } else if (this.currentTarget?.selector?.includes('bom')) {
      suggestedFiles.push('src/routes/bom.ts', 'src/db/bom.ts', 'viewer/bom.js');
    } else if (this.currentTarget?.selector?.includes('traveler')) {
      suggestedFiles.push('src/routes/traveler.ts', 'src/db/traveler.ts', 'viewer/traveler.js');
    } else if (this.currentTarget?.selector?.includes('hil') || this.currentTarget?.selector?.includes('diagnostics')) {
      suggestedFiles.push('src/routes/hil.ts', 'src/db/hil.ts', 'viewer/hil.js');
    }

    const payload = {
      title: titleInput.value.trim(),
      description: descInput ? descInput.value.trim() : '',
      category: catSelect ? catSelect.value : 'feature',
      priority: prioSelect ? prioSelect.value : 'medium',
      status: 'open',
      route: window.location.pathname + window.location.hash,
      target_type: this.currentTarget?.type || 'global',
      target_selector: this.currentTarget?.selector || null,
      part_id: this.currentTarget?.partId || null,
      coordinates_3d: this.currentTarget?.coords3d || null,
      context_snapshot: {
        viewport: `${window.innerWidth}x${window.innerHeight}`,
        userAgent: navigator.userAgent,
        timestamp: new Date().toISOString()
      },
      suggested_files: suggestedFiles
    };

    try {
      const res = await fetch('/api/notes', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(payload)
      });
      if (res.ok) {
        titleInput.value = '';
        if (descInput) descInput.value = '';
        this.closeCreateForm();
        await this.loadNotes();
      }
    } catch (err) {
      console.error('Error saving note:', err);
    }
  }

  async updateStatus(id, newStatus) {
    try {
      await fetch(`/api/notes/${id}/status`, {
        method: 'PUT',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ status: newStatus })
      });
      await this.loadNotes();
    } catch (err) {
      console.error('Error updating status:', err);
    }
  }

  async deleteNote(id) {
    if (!confirm('Delete this feature note?')) return;
    try {
      await fetch(`/api/notes/${id}`, { method: 'DELETE' });
      await this.loadNotes();
    } catch (err) {
      console.error('Error deleting note:', err);
    }
  }

  // -------------------------------------------------------------
  // Render Shadow DOM Template
  // -------------------------------------------------------------
  render() {
    this.shadowRoot.innerHTML = `
      <style>
        :host {
          --fl-bg: #0b0f17;
          --fl-card-bg: #0f172a;
          --fl-border: #1e293b;
          --fl-accent: #06b6d4;
          --fl-accent-hover: #0891b2;
          --fl-emerald: #10b981;
          --fl-amber: #f59e0b;
          --fl-rose: #ef4444;
          --fl-text: #f8fafc;
          --fl-text-muted: #94a3b8;
          font-family: 'Inter', system-ui, -apple-system, sans-serif;
          z-index: 999990;
          position: relative;
        }

        .fl-sheet-handle {
          display: none;
          width: 36px;
          height: 4px;
          background: #475569;
          border-radius: 9999px;
          margin: 0 auto 0.5rem auto;
        }

        #fl-activator {
          position: fixed;
          bottom: max(1.25rem, env(safe-area-inset-bottom));
          right: 1.25rem;
          background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
          border: 1px solid var(--fl-accent);
          color: var(--fl-text);
          padding: 0.6rem 1rem;
          border-radius: 9999px;
          cursor: pointer;
          display: flex;
          align-items: center;
          gap: 0.5rem;
          font-size: 0.8rem;
          font-weight: 700;
          box-shadow: 0 10px 25px -5px rgba(6, 182, 212, 0.4);
          transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
          z-index: 999991;
          user-select: none;
          min-height: 44px;
          touch-action: manipulation;
        }
        #fl-activator:hover {
          transform: translateY(-2px);
          box-shadow: 0 15px 30px -5px rgba(6, 182, 212, 0.6);
          border-color: #38bdf8;
        }
        #fl-activator.active {
          background: var(--fl-accent);
          color: #0f172a;
        }

        .fl-badge {
          background: var(--fl-rose);
          color: white;
          border-radius: 9999px;
          padding: 0.15rem 0.45rem;
          font-size: 0.7rem;
          font-weight: 800;
        }

        #fl-drawer {
          position: fixed;
          top: 0;
          right: -440px;
          width: 420px;
          height: 100vh;
          background: rgba(11, 15, 23, 0.98);
          backdrop-filter: blur(20px);
          border-left: 1px solid var(--fl-border);
          box-shadow: -15px 0 35px rgba(0, 0, 0, 0.85);
          transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1), bottom 0.3s cubic-bezier(0.4, 0, 0.2, 1);
          z-index: 999992;
          display: flex;
          flex-direction: column;
          box-sizing: border-box;
        }
        #fl-drawer.open {
          right: 0;
        }

        .fl-header {
          padding: 1rem;
          border-bottom: 1px solid var(--fl-border);
          display: flex;
          justify-content: space-between;
          align-items: center;
          background: var(--fl-bg);
        }
        .fl-title {
          font-size: 0.95rem;
          font-weight: 800;
          color: var(--fl-accent);
          display: flex;
          align-items: center;
          gap: 0.4rem;
        }
        .fl-close-btn {
          background: transparent;
          border: none;
          color: var(--fl-text-muted);
          font-size: 1.4rem;
          cursor: pointer;
          padding: 0.25rem 0.6rem;
          border-radius: 6px;
          min-width: 44px;
          min-height: 44px;
          display: flex;
          align-items: center;
          justify-content: center;
        }
        .fl-close-btn:hover {
          color: var(--fl-text);
          background: var(--fl-card-bg);
        }

        .fl-body {
          flex: 1;
          overflow-y: auto;
          padding: 1rem;
          display: flex;
          flex-direction: column;
          gap: 0.75rem;
          -webkit-overflow-scrolling: touch;
        }

        .fl-actions {
          display: flex;
          gap: 0.5rem;
          margin-bottom: 0.5rem;
        }
        .fl-btn {
          background: var(--fl-card-bg);
          border: 1px solid var(--fl-border);
          color: var(--fl-text);
          padding: 0.55rem 0.75rem;
          border-radius: 6px;
          font-size: 0.775rem;
          font-weight: 600;
          cursor: pointer;
          display: flex;
          align-items: center;
          justify-content: center;
          gap: 0.35rem;
          flex: 1;
          min-height: 44px;
          transition: all 0.15s ease;
          touch-action: manipulation;
        }
        .fl-btn:hover {
          border-color: var(--fl-accent);
          background: #1e293b;
        }
        .fl-btn-primary {
          background: var(--fl-accent);
          color: #0f172a;
          border: none;
          font-weight: 700;
        }
        .fl-btn-primary:hover {
          background: #38bdf8;
        }

        .fl-card {
          background: var(--fl-card-bg);
          border: 1px solid var(--fl-border);
          border-radius: 8px;
          padding: 0.85rem;
          display: flex;
          flex-direction: column;
          gap: 0.45rem;
          font-size: 0.775rem;
          position: relative;
        }

        .fl-tag {
          padding: 0.15rem 0.45rem;
          border-radius: 4px;
          font-size: 0.65rem;
          font-weight: 700;
          text-transform: uppercase;
        }
        .fl-tag-feature { background: rgba(6, 182, 212, 0.15); color: #38bdf8; }
        .fl-tag-bug { background: rgba(239, 68, 68, 0.15); color: #f87171; }
        .fl-tag-ui_ux { background: rgba(16, 185, 129, 0.15); color: #34d399; }
        .fl-tag-architecture { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }

        .fl-input, .fl-textarea, .fl-select {
          width: 100%;
          background: #090d16;
          border: 1px solid var(--fl-border);
          color: var(--fl-text);
          padding: 0.6rem;
          border-radius: 6px;
          font-size: 0.8rem;
          box-sizing: border-box;
          font-family: inherit;
          min-height: 44px;
        }
        .fl-input:focus, .fl-textarea:focus, .fl-select:focus {
          outline: none;
          border-color: var(--fl-accent);
        }
        .fl-textarea {
          resize: vertical;
          min-height: 90px;
        }

        /* Mobile Responsive Bottom Sheet Transformation */
        @media (max-width: 640px) {
          #fl-activator {
            bottom: max(1rem, env(safe-area-inset-bottom));
            right: 1rem;
            padding: 0.5rem 0.85rem;
            font-size: 0.75rem;
          }

          .fl-sheet-handle {
            display: block;
          }

          #fl-drawer {
            top: auto;
            bottom: -100%;
            right: 0;
            left: 0;
            width: 100%;
            height: 82vh;
            border-left: none;
            border-top: 1px solid var(--fl-border);
            border-radius: 20px 20px 0 0;
            padding-bottom: max(1rem, env(safe-area-inset-bottom));
          }
          #fl-drawer.open {
            bottom: 0;
            right: 0;
          }

          .fl-header {
            flex-direction: column;
            align-items: stretch;
            gap: 0.25rem;
            padding: 0.6rem 1rem 0.5rem 1rem;
          }
          .fl-close-btn {
            position: absolute;
            top: 0.6rem;
            right: 1rem;
          }
        }
      </style>

      <!-- Floating Trigger Button -->
      <div id="fl-activator" onclick="this.getRootNode().host.toggleDrawer()">
        <span>🔍 FeatureLens</span>
        <span id="fl-badge" class="fl-badge" style="display:none;">0</span>
      </div>

      <!-- Slide-Out Drawer / Bottom Sheet Panel -->
      <div id="fl-drawer">
        <div class="fl-header">
          <div class="fl-sheet-handle"></div>
          <div class="fl-title">
            <span>FeatureLens Studio</span>
            <span style="font-size:0.65rem; color:var(--fl-text-muted); font-weight:400;">(OSHW-AI)</span>
          </div>
          <button class="fl-close-btn" onclick="this.getRootNode().host.toggleDrawer(false)">&times;</button>
        </div>

        <div class="fl-body">
          <div class="fl-actions">
            <button class="fl-btn fl-btn-primary" onclick="this.getRootNode().host.startInspectMode()">
              🎯 Inspect & Pin
            </button>
            <button class="fl-btn" onclick="this.getRootNode().host.openCreateForm()">
              ➕ New Note
            </button>
          </div>

          <!-- Create Note Form -->
          <div id="fl-form-container" style="display:none;">
            <div class="fl-card" style="border-color:var(--fl-accent);">
              <div style="font-weight:700; color:var(--fl-accent);">Create AI Staging Note</div>
              <div id="fl-target-label" style="font-size:0.7rem; color:var(--fl-text-muted);">🌐 Global Target</div>
              
              <input type="text" id="fl-title-input" class="fl-input" placeholder="Title (e.g. Wire WebSocket telemetry)" />
              
              <div style="display:grid; grid-template-columns: 1fr 1fr; gap:0.4rem;">
                <select id="fl-cat-select" class="fl-select">
                  <option value="feature">Feature Request</option>
                  <option value="bug">Bug Report</option>
                  <option value="ui_ux">UI/UX Polish</option>
                  <option value="architecture">Architecture Spike</option>
                </select>
                <select id="fl-prio-select" class="fl-select">
                  <option value="medium">Priority: Medium</option>
                  <option value="high">Priority: High</option>
                  <option value="critical">Priority: Critical</option>
                  <option value="low">Priority: Low</option>
                </select>
              </div>

              <textarea id="fl-desc-input" class="fl-textarea" placeholder="Describe the idea or technical requirement for the AI agent..."></textarea>
              
              <div style="display:flex; gap:0.4rem; margin-top:0.3rem;">
                <button class="fl-btn fl-btn-primary" onclick="this.getRootNode().host.saveNote()">Save to Postgres</button>
                <button class="fl-btn" onclick="this.getRootNode().host.closeCreateForm()">Cancel</button>
              </div>
            </div>
          </div>

          <!-- Notes List Container -->
          <div id="fl-list-container" style="display:flex; flex-direction:column; gap:0.5rem;">
            <div style="color:var(--fl-text-muted); font-size:0.75rem; text-align:center;">Loading notes...</div>
          </div>
        </div>
      </div>
    `;
  }

  renderNotesList() {
    const container = this.shadowRoot.querySelector('#fl-list-container');
    if (!container) return;
    container.innerHTML = '';

    if (this.notes.length === 0) {
      container.innerHTML = `<div style="color:var(--fl-text-muted); font-size:0.75rem; text-align:center; padding:1rem;">No active feature notes. Click <strong>Inspect & Pin</strong> to create one!</div>`;
      return;
    }

    this.notes.forEach(note => {
      const card = document.createElement('div');
      card.className = 'fl-card';

      let targetInfo = note.target_selector ? `<code>${note.target_selector}</code>` : 'Global Scope';
      if (note.target_type === '3d_mesh') {
        targetInfo = `3D Part: <strong>${note.part_id}</strong>`;
      }

      card.innerHTML = `
        <div style="display:flex; justify-content:space-between; align-items:flex-start;">
          <span class="fl-tag fl-tag-${note.category}">${note.category}</span>
          <span style="font-size:0.65rem; color:${note.status === 'completed' ? 'var(--fl-emerald)' : 'var(--fl-text-muted)'}; font-weight:700; text-transform:uppercase;">${note.status}</span>
        </div>
        <div style="font-weight:700; color:var(--fl-text); font-size:0.85rem;">${note.title}</div>
        <div style="color:var(--fl-text-muted); font-size:0.7rem;">${targetInfo}</div>
        <div style="color:#cbd5e1; font-size:0.75rem; margin-top:0.2rem; line-height:1.35;">${note.description || 'No description provided.'}</div>
        
        <div style="display:flex; gap:0.4rem; margin-top:0.4rem; padding-top:0.4rem; border-top:1px solid var(--fl-border);">
          <button class="fl-btn fl-btn-primary" style="font-size:0.7rem; padding:0.35rem 0.5rem;" onclick="this.getRootNode().host.copyAiPrompt('${note.id}')">
            📋 Copy AI Prompt
          </button>
          <button class="fl-btn" style="font-size:0.7rem; padding:0.35rem 0.4rem;" onclick="this.getRootNode().host.updateStatus('${note.id}', '${note.status === 'completed' ? 'open' : 'completed'}')">
            ${note.status === 'completed' ? 'Reopen' : 'Complete'}
          </button>
          <button class="fl-btn" style="font-size:0.7rem; padding:0.35rem 0.4rem; color:var(--fl-rose); flex:0 0 44px;" onclick="this.getRootNode().host.deleteNote('${note.id}')">
            🗑️
          </button>
        </div>
      `;
      container.appendChild(card);
    });
  }
}

if (!customElements.get('feature-lens')) {
  customElements.define('feature-lens', FeatureLensElement);
}