import {
  customElement,
  property,
  static as html,
  DeesElement,
  type TemplateResult,
  cssManager,
  css,
} from '@design.estate/dees-element';

import { type IBlock } from './wysiwyg.types.js';
import { WysiwygBlocks } from './wysiwyg.blocks.js';
import { WysiwygSelection } from './wysiwyg.selection.js';
import { BlockRegistry, type IBlockEventHandlers } from './blocks/index.js';
import './wysiwyg.blockregistration.js';

declare global {
  interface HTMLElementTagNameMap {
    'dees-wysiwyg-block': DeesWysiwygBlock;
  }
}

@customElement('dees-wysiwyg-block')
export class DeesWysiwygBlock extends DeesElement {
  async disconnectedCallback() {
    await super.disconnectedCallback();
    // Clean up selection handler
    if ((this as any)._selectionHandler) {
      document.removeEventListener('selectionchange', (this as any)._selectionHandler);
    }
  }
  @property({ type: Object })
  public block: IBlock;

  @property({ type: Boolean })
  public isSelected: boolean = false;

  @property({ type: Object })
  public handlers: IBlockEventHandlers;

  // Reference to the editable block element
  private blockElement: HTMLDivElement | null = null;
  
  // Track if we've initialized the content
  private contentInitialized: boolean = false;
  
  // Track cursor position
  private lastKnownCursorPosition: number = 0;
  private lastSelectedText: string = '';

  private static handlerStylesInjected = false;
  
  private injectHandlerStyles(): void {
    // Only inject once per component class
    if (DeesWysiwygBlock.handlerStylesInjected) return;
    DeesWysiwygBlock.handlerStylesInjected = true;
    
    // Get styles from all registered block handlers
    let styles = '';
    const blockTypes = BlockRegistry.getAllTypes();
    for (const type of blockTypes) {
      const handler = BlockRegistry.getHandler(type);
      if (handler) {
        styles += handler.getStyles();
      }
    }
    
    if (styles) {
      // Create and inject style element
      const styleElement = document.createElement('style');
      styleElement.textContent = styles;
      this.shadowRoot?.appendChild(styleElement);
    }
  }

  public static styles = [
    cssManager.defaultStyles,
    css`
      :host {
        display: block;
      }

      .block {
        padding: 4px 0;
        min-height: 1.6em;
        outline: none;
        width: 100%;
        word-wrap: break-word;
        position: relative;
        transition: all 0.15s ease;
        color: ${cssManager.bdTheme('#000000', '#e0e0e0')};
      }

      .block:empty:not(:focus)::before {
        content: attr(data-placeholder);
        color: ${cssManager.bdTheme('#999', '#666')};
        position: absolute;
        pointer-events: none;
      }

      .block.heading-1 {
        font-size: 32px;
        font-weight: 700;
        line-height: 1.2;
        margin: 24px 0 8px 0;
        color: ${cssManager.bdTheme('#000000', '#ffffff')};
      }

      .block.heading-2 {
        font-size: 24px;
        font-weight: 600;
        line-height: 1.3;
        margin: 20px 0 6px 0;
        color: ${cssManager.bdTheme('#000000', '#ffffff')};
      }

      .block.heading-3 {
        font-size: 20px;
        font-weight: 600;
        line-height: 1.4;
        margin: 16px 0 4px 0;
        color: ${cssManager.bdTheme('#000000', '#ffffff')};
      }

      .block.quote {
        border-left: 3px solid ${cssManager.bdTheme('#0066cc', '#4d94ff')};
        padding-left: 20px;
        color: ${cssManager.bdTheme('#555', '#b0b0b0')};
        font-style: italic;
        line-height: 1.6;
        margin: 16px 0;
      }

      .block.code {
        font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
        font-size: 14px;
        background: ${cssManager.bdTheme('#f8f8f8', '#0d0d0d')};
        border: 1px solid ${cssManager.bdTheme('#e0e0e0', '#2a2a2a')};
        padding: 16px 20px;
        padding-top: 32px;
        border-radius: 6px;
        white-space: pre-wrap;
        color: ${cssManager.bdTheme('#24292e', '#e1e4e8')};
        line-height: 1.5;
        overflow-x: auto;
        margin: 20px 0;
      }

      .block.list {
        padding: 0;
      }

      .block.list ul,
      .block.list ol {
        margin: 0;
        padding-left: 24px;
      }

      .block.list li {
        margin: 4px 0;
      }


      /* Formatting styles */
      .block :is(b, strong) {
        font-weight: 600;
        color: ${cssManager.bdTheme('#000000', '#ffffff')};
      }

      .block :is(i, em) {
        font-style: italic;
      }

      .block u {
        text-decoration: underline;
      }

      .block s {
        text-decoration: line-through;
      }

      .block code {
        font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
        font-size: 0.9em;
        background: ${cssManager.bdTheme('rgba(0, 0, 0, 0.06)', 'rgba(255, 255, 255, 0.1)')};
        padding: 2px 6px;
        border-radius: 3px;
        color: ${cssManager.bdTheme('#d14', '#ff6b6b')};
      }

      .block a {
        color: ${cssManager.bdTheme('#0066cc', '#4d94ff')};
        text-decoration: none;
        border-bottom: 1px solid transparent;
        transition: border-color 0.15s ease;
        cursor: pointer;
      }

      .block a:hover {
        border-bottom-color: ${cssManager.bdTheme('#0066cc', '#4d94ff')};
      }

      .code-language {
        position: absolute;
        top: 0;
        right: 0;
        background: ${cssManager.bdTheme('#e1e4e8', '#333333')};
        color: ${cssManager.bdTheme('#586069', '#8b949e')};
        padding: 4px 12px;
        font-size: 12px;
        border-radius: 0 6px 0 6px;
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        text-transform: lowercase;
        z-index: 1;
      }

      .code-block-container {
        position: relative;
        margin: 20px 0;
      }

      /* Selection styles */
      .block ::selection {
        background: ${cssManager.bdTheme('rgba(0, 102, 204, 0.3)', 'rgba(77, 148, 255, 0.3)')};
        color: inherit;
      }

      /* Paragraph specific styles */
      .block.paragraph {
        font-size: 16px;
        line-height: 1.6;
        font-weight: 400;
      }

      /* Strike through */
      .block :is(s, strike) {
        text-decoration: line-through;
        opacity: 0.7;
      }

      /* List specific margin adjustments */
      .block.list li {
        margin-bottom: 8px;
        line-height: 1.6;
      }

      .block.list li:last-child {
        margin-bottom: 0;
      }

      /* Block margin adjustments based on type */
      :host-context(.block-wrapper:first-child) .block {
        margin-top: 0 !important;
      }

      :host-context(.block-wrapper:last-child) .block {
        margin-bottom: 0;
      }

      /* Selected state */
      .block.selected {
        background: ${cssManager.bdTheme('rgba(0, 102, 204, 0.05)', 'rgba(77, 148, 255, 0.08)')};
        box-shadow: inset 0 0 0 2px ${cssManager.bdTheme('rgba(0, 102, 204, 0.2)', 'rgba(77, 148, 255, 0.2)')};
        border-radius: 4px;
        margin-left: -8px;
        margin-right: -8px;
        padding-left: 8px;
        padding-right: 8px;
      }

      /* Image block styles */
      .block.image {
        min-height: 200px;
        padding: 0;
        margin: 16px 0;
        border-radius: 8px;
        overflow: hidden;
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.15s ease;
      }

      .block.image:focus {
        outline: none;
      }

      .block.image.selected {
        box-shadow: 0 0 0 3px ${cssManager.bdTheme('rgba(0, 102, 204, 0.3)', 'rgba(77, 148, 255, 0.3)')};
      }

      .image-upload-placeholder {
        width: 100%;
        height: 200px;
        background: ${cssManager.bdTheme('#f8f8f8', '#1a1a1a')};
        border: 2px dashed ${cssManager.bdTheme('#d0d0d0', '#404040')};
        border-radius: 8px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: all 0.2s ease;
      }

      .image-upload-placeholder:hover {
        background: ${cssManager.bdTheme('#f0f0f0', '#222222')};
        border-color: ${cssManager.bdTheme('#0066cc', '#4d94ff')};
      }

      .image-upload-placeholder:active {
        transform: scale(0.98);
      }

      .image-upload-placeholder.drag-over {
        background: ${cssManager.bdTheme('#e3f2fd', '#1e3a5f')};
        border-color: ${cssManager.bdTheme('#2196F3', '#64b5f6')};
      }

      .upload-icon {
        font-size: 48px;
        margin-bottom: 12px;
        opacity: 0.7;
      }

      .upload-text {
        font-size: 16px;
        color: ${cssManager.bdTheme('#666', '#999')};
        margin-bottom: 8px;
      }

      .upload-hint {
        font-size: 13px;
        color: ${cssManager.bdTheme('#999', '#666')};
      }

      .image-container {
        width: 100%;
        position: relative;
      }

      .image-container img {
        width: 100%;
        height: auto;
        display: block;
        border-radius: 8px;
      }

      .image-loading {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        padding: 16px 24px;
        background: rgba(0, 0, 0, 0.8);
        color: white;
        border-radius: 8px;
        font-size: 14px;
      }

      input[type="file"] {
        display: none;
      }

      /* YouTube block styles */
      .block.youtube {
        padding: 0;
        margin: 16px 0;
        border-radius: 8px;
        overflow: hidden;
        position: relative;
        cursor: pointer;
        transition: all 0.15s ease;
      }

      .block.youtube:focus {
        outline: none;
      }

      .block.youtube.selected {
        box-shadow: 0 0 0 3px ${cssManager.bdTheme('rgba(0, 102, 204, 0.3)', 'rgba(77, 148, 255, 0.3)')};
      }

      .youtube-container {
        position: relative;
        padding-bottom: 56.25%; /* 16:9 aspect ratio */
        height: 0;
        overflow: hidden;
      }

      .youtube-container iframe {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        border: none;
      }

      .youtube-placeholder {
        background: ${cssManager.bdTheme('#f8f8f8', '#1a1a1a')};
        border: 2px dashed ${cssManager.bdTheme('#d0d0d0', '#404040')};
        border-radius: 8px;
        padding: 40px;
        text-align: center;
      }

      .placeholder-icon {
        font-size: 48px;
        margin-bottom: 16px;
      }

      .placeholder-text {
        font-size: 16px;
        color: ${cssManager.bdTheme('#666', '#999')};
        margin-bottom: 16px;
      }

      .youtube-url-input {
        width: 100%;
        max-width: 400px;
        padding: 12px;
        border: 1px solid ${cssManager.bdTheme('#ddd', '#444')};
        border-radius: 6px;
        font-size: 14px;
        margin-bottom: 16px;
        background: ${cssManager.bdTheme('#fff', '#222')};
        color: ${cssManager.bdTheme('#000', '#fff')};
      }

      .youtube-embed-btn {
        padding: 10px 24px;
        background: ${cssManager.bdTheme('#0066cc', '#4d94ff')};
        color: white;
        border: none;
        border-radius: 6px;
        font-size: 14px;
        font-weight: 500;
        cursor: pointer;
        transition: background 0.2s ease;
      }

      .youtube-embed-btn:hover {
        background: ${cssManager.bdTheme('#0052a3', '#3d7dd9')};
      }

      /* Markdown block styles */
      .block.markdown {
        padding: 0;
        margin: 16px 0;
        border: 1px solid ${cssManager.bdTheme('#e0e0e0', '#333')};
        border-radius: 8px;
        overflow: hidden;
        cursor: pointer;
        transition: all 0.15s ease;
      }

      .block.markdown:focus {
        outline: none;
      }

      .block.markdown.selected {
        box-shadow: 0 0 0 3px ${cssManager.bdTheme('rgba(0, 102, 204, 0.3)', 'rgba(77, 148, 255, 0.3)')};
      }

      .markdown-toolbar,
      .html-toolbar {
        background: ${cssManager.bdTheme('#f5f5f5', '#2a2a2a')};
        padding: 8px 16px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        border-bottom: 1px solid ${cssManager.bdTheme('#e0e0e0', '#333')};
      }

      .markdown-label,
      .html-label {
        font-size: 12px;
        text-transform: uppercase;
        color: ${cssManager.bdTheme('#666', '#999')};
        font-weight: 500;
      }

      .toggle-preview {
        padding: 6px 12px;
        background: ${cssManager.bdTheme('#fff', '#333')};
        border: 1px solid ${cssManager.bdTheme('#ddd', '#555')};
        border-radius: 4px;
        font-size: 12px;
        cursor: pointer;
        transition: all 0.2s ease;
      }

      .toggle-preview:hover {
        background: ${cssManager.bdTheme('#f0f0f0', '#444')};
      }

      .markdown-content,
      .html-content {
        min-height: 200px;
      }

      .markdown-editor,
      .html-editor {
        width: 100%;
        min-height: 200px;
        padding: 16px;
        border: none;
        resize: vertical;
        font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
        font-size: 14px;
        background: ${cssManager.bdTheme('#fff', '#1a1a1a')};
        color: ${cssManager.bdTheme('#000', '#fff')};
      }

      .markdown-preview,
      .html-preview {
        padding: 16px;
        min-height: 200px;
        background: ${cssManager.bdTheme('#fff', '#1a1a1a')};
      }

      .markdown-preview h1,
      .markdown-preview h2,
      .markdown-preview h3 {
        margin-top: 16px;
        margin-bottom: 8px;
      }

      .markdown-preview h1:first-child,
      .markdown-preview h2:first-child,
      .markdown-preview h3:first-child {
        margin-top: 0;
      }

      /* HTML block styles */
      .block.html {
        padding: 0;
        margin: 16px 0;
        border: 1px solid ${cssManager.bdTheme('#e0e0e0', '#333')};
        border-radius: 8px;
        overflow: hidden;
        cursor: pointer;
        transition: all 0.15s ease;
      }

      .block.html:focus {
        outline: none;
      }

      .block.html.selected {
        box-shadow: 0 0 0 3px ${cssManager.bdTheme('rgba(0, 102, 204, 0.3)', 'rgba(77, 148, 255, 0.3)')};
      }

      /* Attachment block styles */
      .block.attachment {
        padding: 0;
        margin: 16px 0;
        border: 1px solid ${cssManager.bdTheme('#e0e0e0', '#333')};
        border-radius: 8px;
        overflow: hidden;
        cursor: pointer;
        transition: all 0.15s ease;
      }

      .block.attachment:focus {
        outline: none;
      }

      .block.attachment.selected {
        box-shadow: 0 0 0 3px ${cssManager.bdTheme('rgba(0, 102, 204, 0.3)', 'rgba(77, 148, 255, 0.3)')};
      }

      .block.attachment.drag-over {
        background: ${cssManager.bdTheme('#e3f2fd', '#1e3a5f')};
      }

      .attachment-header {
        background: ${cssManager.bdTheme('#f5f5f5', '#2a2a2a')};
        padding: 16px;
        display: flex;
        align-items: center;
        gap: 12px;
        border-bottom: 1px solid ${cssManager.bdTheme('#e0e0e0', '#333')};
      }

      .attachment-icon {
        font-size: 24px;
      }

      .attachment-title {
        font-size: 16px;
        font-weight: 500;
      }

      .attachment-list {
        padding: 16px;
        min-height: 100px;
      }

      .attachment-placeholder {
        text-align: center;
        padding: 40px;
        border: 2px dashed ${cssManager.bdTheme('#d0d0d0', '#404040')};
        border-radius: 8px;
        cursor: pointer;
        transition: all 0.2s ease;
      }

      .attachment-placeholder:hover {
        background: ${cssManager.bdTheme('#f8f8f8', '#1a1a1a')};
        border-color: ${cssManager.bdTheme('#0066cc', '#4d94ff')};
      }

      .placeholder-hint {
        font-size: 13px;
        color: ${cssManager.bdTheme('#999', '#666')};
        margin-top: 8px;
      }

      .attachment-item {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px;
        background: ${cssManager.bdTheme('#f8f8f8', '#222')};
        border-radius: 6px;
        margin-bottom: 8px;
        transition: background 0.2s ease;
      }

      .attachment-item:hover {
        background: ${cssManager.bdTheme('#f0f0f0', '#2a2a2a')};
      }

      .file-icon {
        font-size: 24px;
        flex-shrink: 0;
      }

      .file-info {
        flex: 1;
        min-width: 0;
      }

      .file-name {
        font-weight: 500;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .file-size {
        font-size: 12px;
        color: ${cssManager.bdTheme('#666', '#999')};
      }

      .remove-file {
        width: 24px;
        height: 24px;
        border: none;
        background: transparent;
        color: ${cssManager.bdTheme('#999', '#666')};
        font-size: 20px;
        line-height: 1;
        cursor: pointer;
        opacity: 0;
        transition: all 0.2s ease;
      }

      .attachment-item:hover .remove-file {
        opacity: 1;
      }

      .remove-file:hover {
        color: ${cssManager.bdTheme('#d32f2f', '#f44336')};
      }

      .add-more-files {
        width: 100%;
        padding: 10px;
        background: transparent;
        border: 1px dashed ${cssManager.bdTheme('#ddd', '#444')};
        border-radius: 6px;
        color: ${cssManager.bdTheme('#666', '#999')};
        font-size: 14px;
        cursor: pointer;
        transition: all 0.2s ease;
      }

      .add-more-files:hover {
        background: ${cssManager.bdTheme('#f8f8f8', '#1a1a1a')};
        border-color: ${cssManager.bdTheme('#0066cc', '#4d94ff')};
        color: ${cssManager.bdTheme('#0066cc', '#4d94ff')};
      }
    `,
  ];

  protected shouldUpdate(changedProperties: Map<string, any>): boolean {
    // If selection state changed, update the selected class without re-rendering
    if (changedProperties.has('isSelected') && this.block) {
      // Find the block element based on block type
      let element: HTMLElement | null = null;
      
      // Build the specific selector based on block type
      const blockType = this.block.type;
      const selector = `.block.${blockType}`;
      
      element = this.shadowRoot?.querySelector(selector) as HTMLElement;
      
      if (element) {
        if (this.isSelected) {
          element.classList.add('selected');
        } else {
          element.classList.remove('selected');
        }
      }
      return false; // Don't re-render, just update the class
    }
    
    // Never update if only the block content changed
    if (changedProperties.has('block') && this.block) {
      const oldBlock = changedProperties.get('block');
      if (oldBlock && oldBlock.id && oldBlock.type && oldBlock.id === this.block.id && oldBlock.type === this.block.type) {
        // Only content or metadata changed, don't re-render
        return false;
      }
    }
    
    // Only update if the block type or id changes
    return !this.blockElement || this.block?.type !== this.blockElement.dataset.blockType;
  }
  
  public firstUpdated(): void {
    // Mark that content has been initialized
    this.contentInitialized = true;
    
    // Inject handler styles if not already done
    this.injectHandlerStyles();
    
    // First, populate the container with the rendered content
    const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLDivElement;
    if (container && this.block) {
      container.innerHTML = this.renderBlockContent();
    }
    
    // Check if we have a registered handler for this block type
    if (this.block) {
      const handler = BlockRegistry.getHandler(this.block.type);
      if (handler) {
        const blockElement = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLElement;
        if (blockElement) {
          handler.setup(blockElement, this.block, this.handlers);
        }
        return; // Block handler takes care of all setup
      }
    }
    
    // Handle special block types
    if (this.block.type === 'image') {
      this.setupImageBlock();
      return; // Image blocks don't need the standard editable setup
    } else if (this.block.type === 'youtube') {
      this.setupYouTubeBlock();
      return;
    } else if (this.block.type === 'markdown') {
      this.setupMarkdownBlock();
      return;
    } else if (this.block.type === 'html') {
      this.setupHtmlBlock();
      return;
    } else if (this.block.type === 'attachment') {
      this.setupAttachmentBlock();
      return;
    }
    
    // Now find the actual editable block element
    const editableBlock = this.block.type === 'code' 
      ? this.shadowRoot?.querySelector('.block.code') as HTMLDivElement
      : this.shadowRoot?.querySelector('.block') as HTMLDivElement;
    
    // Ensure the block element maintains its content
    if (editableBlock) {
      editableBlock.setAttribute('data-block-id', this.block.id);
      editableBlock.setAttribute('data-block-type', this.block.type);
      
      // Set up all event handlers manually to avoid Lit re-renders
      editableBlock.addEventListener('input', (e) => {
        this.handlers?.onInput?.(e as InputEvent);
        
        // Track cursor position after input
        const pos = this.getCursorPosition(editableBlock);
        if (pos !== null) {
          this.lastKnownCursorPosition = pos;
        }
      });
      
      editableBlock.addEventListener('keydown', (e) => {
        // Track cursor position before keydown
        const pos = this.getCursorPosition(editableBlock);
        if (pos !== null) {
          this.lastKnownCursorPosition = pos;
        }
        
        this.handlers?.onKeyDown?.(e);
      });
      
      
      editableBlock.addEventListener('focus', () => {
        this.handlers?.onFocus?.();
      });
      
      editableBlock.addEventListener('blur', () => {
        this.handlers?.onBlur?.();
      });
      
      editableBlock.addEventListener('compositionstart', () => {
        this.handlers?.onCompositionStart?.();
      });
      
      editableBlock.addEventListener('compositionend', () => {
        this.handlers?.onCompositionEnd?.();
      });
      
      editableBlock.addEventListener('mouseup', (e) => {
        const pos = this.getCursorPosition(editableBlock);
        if (pos !== null) {
          this.lastKnownCursorPosition = pos;
        }
        
        // Selection will be handled by selectionchange event
        this.handlers?.onMouseUp?.(e);
      });
      
      editableBlock.addEventListener('click', (e: MouseEvent) => {
        // Small delay to let browser set cursor position
        setTimeout(() => {
          const pos = this.getCursorPosition(editableBlock);
          if (pos !== null) {
            this.lastKnownCursorPosition = pos;
          }
        }, 0);
      });
      
      // Add selection change handler
      const checkSelection = () => {
        const selection = window.getSelection();
        if (!selection || selection.rangeCount === 0) return;
        
        const selectedText = selection.toString();
        if (selectedText.length === 0) {
          // Clear selection if no text
          if (this.lastSelectedText) {
            this.lastSelectedText = '';
            this.dispatchEvent(new CustomEvent('block-text-selected', {
              detail: {
                text: '',
                blockId: this.block.id,
                hasSelection: false
              },
              bubbles: true,
              composed: true
            }));
          }
          return;
        }
        
        // Get fresh reference to the editable block
        const currentEditableBlock = this.block?.type === 'code' 
          ? this.shadowRoot?.querySelector('.block.code') as HTMLDivElement
          : this.shadowRoot?.querySelector('.block') as HTMLDivElement;
          
        if (!currentEditableBlock) return;
        
        // Get parent wysiwyg component's shadow root
        const parentComponent = this.closest('dees-input-wysiwyg');
        const parentShadowRoot = parentComponent?.shadowRoot;
        
        // Use getComposedRanges with shadow roots as per MDN docs
        const shadowRoots: ShadowRoot[] = [];
        if (parentShadowRoot) shadowRoots.push(parentShadowRoot);
        if (this.shadowRoot) shadowRoots.push(this.shadowRoot);
        
        // Get selection info using our Shadow DOM-aware utility
        const selectionInfo = WysiwygSelection.getSelectionInfo(...shadowRoots);
        if (!selectionInfo) return;
        
        // Check if selection is within this block
        const startInBlock = WysiwygSelection.containsAcrossShadowDOM(currentEditableBlock, selectionInfo.startContainer);
        const endInBlock = WysiwygSelection.containsAcrossShadowDOM(currentEditableBlock, selectionInfo.endContainer);
        
        if (startInBlock || endInBlock) {
          if (selectedText !== this.lastSelectedText) {
            this.lastSelectedText = selectedText;
            
            // Create range and get rect
            const range = WysiwygSelection.createRangeFromInfo(selectionInfo);
            const rect = range.getBoundingClientRect();
            
            // Dispatch event
            this.dispatchEvent(new CustomEvent('block-text-selected', {
              detail: {
                text: selectedText.trim(),
                blockId: this.block.id,
                range: range,
                rect: rect,
                hasSelection: true
              },
              bubbles: true,
              composed: true
            }));
          }
        } else if (this.lastSelectedText) {
          // Clear selection if no longer in this block
          this.lastSelectedText = '';
          this.dispatchEvent(new CustomEvent('block-text-selected', {
            detail: {
              text: '',
              blockId: this.block.id,
              hasSelection: false
            },
            bubbles: true,
            composed: true
          }));
        }
      };
      
      // Listen for selection changes
      document.addEventListener('selectionchange', checkSelection);
      
      // Store the handler for cleanup
      (this as any)._selectionHandler = checkSelection;
      
      // Add keyup handler for cursor position tracking
      editableBlock.addEventListener('keyup', (e) => {
        // Track cursor position
        const pos = this.getCursorPosition(editableBlock);
        if (pos !== null) {
          this.lastKnownCursorPosition = pos;
        }
      });
      
      // Set initial content if needed
      if (this.block.content) {
        if (this.block.type === 'code') {
          editableBlock.textContent = this.block.content;
        } else if (this.block.type === 'list') {
          editableBlock.innerHTML = WysiwygBlocks.renderListContent(this.block.content, this.block.metadata);
        } else {
          editableBlock.innerHTML = this.block.content;
        }
      }
    }
    
    // Store reference to the block element for quick access
    this.blockElement = editableBlock;
  }

  render(): TemplateResult {
    if (!this.block) return html``;

    // Since we need dynamic content, we'll render an empty container
    // and set the innerHTML in firstUpdated
    return html`<div class="wysiwyg-block-container"></div>`;
  }
  
  private renderBlockContent(): string {
    if (!this.block) return '';

    // Check if we have a registered handler for this block type
    const handler = BlockRegistry.getHandler(this.block.type);
    if (handler) {
      return handler.render(this.block, this.isSelected);
    }

    if (this.block.type === 'code') {
      const language = this.block.metadata?.language || 'plain text';
      const selectedClass = this.isSelected ? ' selected' : '';
      return `
        <div class="code-block-container">
          <div class="code-language">${language}</div>
          <div
            class="block code${selectedClass}"
            contenteditable="true"
            data-block-type="${this.block.type}"
          ></div>
        </div>
      `;
    }

    if (this.block.type === 'image') {
      const selectedClass = this.isSelected ? ' selected' : '';
      const imageUrl = this.block.metadata?.url || '';
      const isLoading = this.block.metadata?.loading || false;
      
      return `
        <div class="block image${selectedClass}" data-block-id="${this.block.id}" data-block-type="${this.block.type}" tabindex="0">
          ${isLoading ? `
            <div class="image-loading">Uploading image...</div>
          ` : ''}
          ${imageUrl ? `
            <div class="image-container">
              <img src="${imageUrl}" alt="${this.block.content || 'Uploaded image'}" />
            </div>
          ` : `
            <div class="image-upload-placeholder">
              <div class="upload-icon">🖼️</div>
              <div class="upload-text">Click to upload an image</div>
              <div class="upload-hint">or drag and drop</div>
            </div>
            <input type="file" accept="image/*" style="display: none;" />
          `}
        </div>
      `;
    }

    if (this.block.type === 'youtube') {
      const selectedClass = this.isSelected ? ' selected' : '';
      const videoId = this.block.metadata?.videoId || '';
      const url = this.block.metadata?.url || '';
      
      return `
        <div class="block youtube${selectedClass}" data-block-id="${this.block.id}" data-block-type="${this.block.type}" tabindex="0">
          ${videoId ? `
            <div class="youtube-container">
              <iframe 
                src="https://www.youtube.com/embed/${videoId}"
                frameborder="0"
                allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
                allowfullscreen
              ></iframe>
            </div>
          ` : `
            <div class="youtube-placeholder">
              <div class="placeholder-icon">▶️</div>
              <div class="placeholder-text">Enter YouTube URL</div>
              <input type="url" class="youtube-url-input" placeholder="https://youtube.com/watch?v=..." value="${url || ''}" />
              <button class="youtube-embed-btn">Embed Video</button>
            </div>
          `}
        </div>
      `;
    }

    if (this.block.type === 'markdown') {
      const selectedClass = this.isSelected ? ' selected' : '';
      const showPreview = this.block.metadata?.showPreview !== false;
      
      return `
        <div class="block markdown${selectedClass}" data-block-id="${this.block.id}" data-block-type="${this.block.type}" tabindex="0">
          <div class="markdown-toolbar">
            <button class="toggle-preview" data-active="${showPreview}">
              ${showPreview ? 'Edit' : 'Preview'}
            </button>
            <span class="markdown-label">Markdown</span>
          </div>
          <div class="markdown-content">
            ${showPreview ? `
              <div class="markdown-preview"></div>
            ` : `
              <textarea class="markdown-editor" placeholder="Write markdown here...">${this.block.content || ''}</textarea>
            `}
          </div>
        </div>
      `;
    }

    if (this.block.type === 'html') {
      const selectedClass = this.isSelected ? ' selected' : '';
      const showPreview = this.block.metadata?.showPreview !== false;
      
      return `
        <div class="block html${selectedClass}" data-block-id="${this.block.id}" data-block-type="${this.block.type}" tabindex="0">
          <div class="html-toolbar">
            <button class="toggle-preview" data-active="${showPreview}">
              ${showPreview ? 'Edit' : 'Preview'}
            </button>
            <span class="html-label">HTML</span>
          </div>
          <div class="html-content">
            ${showPreview ? `
              <div class="html-preview"></div>
            ` : `
              <textarea class="html-editor" placeholder="Write HTML here...">${this.block.content || ''}</textarea>
            `}
          </div>
        </div>
      `;
    }

    if (this.block.type === 'attachment') {
      const selectedClass = this.isSelected ? ' selected' : '';
      const files = this.block.metadata?.files || [];
      
      return `
        <div class="block attachment${selectedClass}" data-block-id="${this.block.id}" data-block-type="${this.block.type}" tabindex="0">
          <div class="attachment-header">
            <div class="attachment-icon">📎</div>
            <div class="attachment-title">File Attachments</div>
          </div>
          <div class="attachment-list">
            ${files.length > 0 ? files.map((file: any) => `
              <div class="attachment-item">
                <div class="file-icon">${this.getFileIcon(file.type)}</div>
                <div class="file-info">
                  <div class="file-name">${file.name}</div>
                  <div class="file-size">${this.formatFileSize(file.size)}</div>
                </div>
                <button class="remove-file" data-file-id="${file.id}">×</button>
              </div>
            `).join('') : `
              <div class="attachment-placeholder">
                <div class="placeholder-text">Click to add files</div>
                <div class="placeholder-hint">or drag and drop</div>
              </div>
            `}
          </div>
          <input type="file" multiple style="display: none;" />
          ${files.length > 0 ? '<button class="add-more-files">Add More Files</button>' : ''}
        </div>
      `;
    }

    const placeholder = this.getPlaceholder();
    const selectedClass = this.isSelected ? ' selected' : '';
    return `
      <div
        class="block ${this.block.type}${selectedClass}"
        contenteditable="true"
        data-placeholder="${placeholder}"
      ></div>
    `;
  }

  private getPlaceholder(): string {
    switch (this.block.type) {
      case 'paragraph':
        return "Type '/' for commands...";
      case 'heading-1':
        return 'Heading 1';
      case 'heading-2':
        return 'Heading 2';
      case 'heading-3':
        return 'Heading 3';
      case 'quote':
        return 'Quote';
      case 'image':
        return 'Click to upload an image';
      default:
        return '';
    }
  }


  public focus(): void {
    // Check if we have a registered handler for this block type
    const handler = BlockRegistry.getHandler(this.block.type);
    if (handler && handler.focus) {
      const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLElement;
      const context = { shadowRoot: this.shadowRoot!, component: this };
      return handler.focus(container, context);
    }
    
    // Handle non-editable blocks
    const nonEditableTypes = ['image', 'divider', 'youtube', 'markdown', 'html', 'attachment'];
    if (this.block && nonEditableTypes.includes(this.block.type)) {
      const blockElement = this.shadowRoot?.querySelector(`.block.${this.block.type}`) as HTMLDivElement;
      if (blockElement) {
        blockElement.focus();
      }
      return;
    }
    
    // Get the actual editable element (might be nested for code blocks)
    const editableElement = this.block?.type === 'code' 
      ? this.shadowRoot?.querySelector('.block.code') as HTMLDivElement
      : this.shadowRoot?.querySelector('.block') as HTMLDivElement;
      
    if (!editableElement) return;
    
    // Ensure the element is focusable
    if (!editableElement.hasAttribute('contenteditable')) {
      editableElement.setAttribute('contenteditable', 'true');
    }
    
    editableElement.focus();
    
    // If focus failed, try again after a microtask
    if (document.activeElement !== editableElement && this.shadowRoot?.activeElement !== editableElement) {
      Promise.resolve().then(() => {
        editableElement.focus();
      });
    }
  }
  
  public focusWithCursor(position: 'start' | 'end' | number = 'end'): void {
    console.log('focusWithCursor called', { 
      blockId: this.block?.id, 
      blockType: this.block?.type,
      position 
    });
    
    // Check if we have a registered handler for this block type
    const handler = BlockRegistry.getHandler(this.block.type);
    if (handler && handler.focusWithCursor) {
      const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLElement;
      const context = { shadowRoot: this.shadowRoot!, component: this };
      return handler.focusWithCursor(container, position, context);
    }
    
    // Non-editable blocks don't support cursor positioning
    const nonEditableTypes = ['image', 'divider', 'youtube', 'markdown', 'html', 'attachment'];
    if (this.block && nonEditableTypes.includes(this.block.type)) {
      this.focus();
      return;
    }
    
    // Get the actual editable element (might be nested for code blocks)
    const editableElement = this.block?.type === 'code' 
      ? this.shadowRoot?.querySelector('.block.code') as HTMLDivElement
      : this.shadowRoot?.querySelector('.block') as HTMLDivElement;
      
    if (!editableElement) return;
    
    // Ensure element is focusable first
    if (!editableElement.hasAttribute('contenteditable')) {
      editableElement.setAttribute('contenteditable', 'true');
    }
    
    // Focus the element
    editableElement.focus();
    
    // Set cursor position after focus is established
    const setCursor = () => {
      if (position === 'start') {
        this.setCursorToStart();
      } else if (position === 'end') {
        this.setCursorToEnd();
      } else if (typeof position === 'number') {
        // Use the new selection utility to set cursor position
        WysiwygSelection.setCursorPosition(editableElement, position);
      }
    };
    
    // Ensure cursor is set after focus
    if (document.activeElement === editableElement || this.shadowRoot?.activeElement === editableElement) {
      setCursor();
    } else {
      // Wait for focus to be established
      Promise.resolve().then(() => {
        if (document.activeElement === editableElement || this.shadowRoot?.activeElement === editableElement) {
          setCursor();
        }
      });
    }
  }
  
  

  /**
   * Get cursor position in the editable element
   */
  public getCursorPosition(element: HTMLElement): number | null {
    // Check if we have a registered handler for this block type
    const handler = BlockRegistry.getHandler(this.block.type);
    if (handler && handler.getCursorPosition) {
      const context = { shadowRoot: this.shadowRoot!, component: this };
      return handler.getCursorPosition(element, context);
    }
    
    // Get parent wysiwyg component's shadow root
    const parentComponent = this.closest('dees-input-wysiwyg');
    const parentShadowRoot = parentComponent?.shadowRoot;
    
    // Get selection info with both shadow roots for proper traversal
    const shadowRoots: ShadowRoot[] = [];
    if (parentShadowRoot) shadowRoots.push(parentShadowRoot);
    if (this.shadowRoot) shadowRoots.push(this.shadowRoot);
    
    const selectionInfo = WysiwygSelection.getSelectionInfo(...shadowRoots);
    console.log('getCursorPosition: Selection info from shadow DOMs:', {
      selectionInfo,
      shadowRootsCount: shadowRoots.length
    });
    
    if (!selectionInfo) {
      console.log('getCursorPosition: No selection found');
      return null;
    }
    
    console.log('getCursorPosition: Range info:', {
      startContainer: selectionInfo.startContainer,
      startOffset: selectionInfo.startOffset,
      collapsed: selectionInfo.collapsed,
      startContainerText: selectionInfo.startContainer.textContent
    });
    
    if (!element.contains(selectionInfo.startContainer)) {
      console.log('getCursorPosition: Range not in element');
      return null;
    }
    
    // Create a range from start of element to cursor position
    const preCaretRange = document.createRange();
    preCaretRange.selectNodeContents(element);
    preCaretRange.setEnd(selectionInfo.startContainer, selectionInfo.startOffset);
    
    // Get the text content length up to cursor
    const position = preCaretRange.toString().length;
    console.log('getCursorPosition: Calculated position:', {
      position,
      preCaretText: preCaretRange.toString(),
      elementText: element.textContent,
      elementTextLength: element.textContent?.length
    });
    
    return position;
  }

  public getContent(): string {
    // Check if we have a registered handler for this block type
    const handler = BlockRegistry.getHandler(this.block.type);
    if (handler && handler.getContent) {
      const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLElement;
      const context = { shadowRoot: this.shadowRoot!, component: this };
      return handler.getContent(container, context);
    }
    
    // Handle image blocks specially
    if (this.block?.type === 'image') {
      return this.block.content || ''; // Image blocks store alt text in content
    }
    
    // Get the actual editable element (might be nested for code blocks)
    const editableElement = this.block?.type === 'code' 
      ? this.shadowRoot?.querySelector('.block.code') as HTMLDivElement
      : this.shadowRoot?.querySelector('.block') as HTMLDivElement;
      
    if (!editableElement) return '';
    
    if (this.block.type === 'list') {
      const listItems = editableElement.querySelectorAll('li');
      return Array.from(listItems).map(li => li.innerHTML || '').join('\n');
    } else if (this.block.type === 'code') {
      return editableElement.textContent || '';
    } else {
      // For regular blocks, get the innerHTML which includes formatting tags
      const content = editableElement.innerHTML || '';
      console.log('Getting content from block:', content);
      return content;
    }
  }

  public setContent(content: string): void {
    // Check if we have a registered handler for this block type
    const handler = BlockRegistry.getHandler(this.block.type);
    if (handler && handler.setContent) {
      const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLElement;
      const context = { shadowRoot: this.shadowRoot!, component: this };
      return handler.setContent(container, content, context);
    }
    
    // Get the actual editable element (might be nested for code blocks)
    const editableElement = this.block?.type === 'code' 
      ? this.shadowRoot?.querySelector('.block.code') as HTMLDivElement
      : this.shadowRoot?.querySelector('.block') as HTMLDivElement;
      
    if (!editableElement) return;
    
    // Store if we have focus
    const hadFocus = document.activeElement === editableElement || this.shadowRoot?.activeElement === editableElement;
    
    if (this.block.type === 'list') {
      editableElement.innerHTML = WysiwygBlocks.renderListContent(content, this.block.metadata);
    } else if (this.block.type === 'code') {
      editableElement.textContent = content;
    } else {
      editableElement.innerHTML = content;
    }
    
    // Restore focus if we had it
    if (hadFocus) {
      editableElement.focus();
    }
  }

  public setCursorToStart(): void {
    // Check if we have a registered handler for this block type
    const handler = BlockRegistry.getHandler(this.block.type);
    if (handler && handler.setCursorToStart) {
      const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLElement;
      const context = { shadowRoot: this.shadowRoot!, component: this };
      return handler.setCursorToStart(container, context);
    }
    
    // Always find the element fresh, don't rely on cached blockElement
    const editableElement = this.block?.type === 'code' 
      ? this.shadowRoot?.querySelector('.block.code') as HTMLDivElement
      : this.shadowRoot?.querySelector('.block') as HTMLDivElement;
    if (editableElement) {
      WysiwygBlocks.setCursorToStart(editableElement);
    }
  }

  public setCursorToEnd(): void {
    // Check if we have a registered handler for this block type
    const handler = BlockRegistry.getHandler(this.block.type);
    if (handler && handler.setCursorToEnd) {
      const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLElement;
      const context = { shadowRoot: this.shadowRoot!, component: this };
      return handler.setCursorToEnd(container, context);
    }
    
    // Always find the element fresh, don't rely on cached blockElement
    const editableElement = this.block?.type === 'code' 
      ? this.shadowRoot?.querySelector('.block.code') as HTMLDivElement
      : this.shadowRoot?.querySelector('.block') as HTMLDivElement;
    if (editableElement) {
      WysiwygBlocks.setCursorToEnd(editableElement);
    }
  }

  public focusListItem(): void {
    if (this.block.type === 'list') {
      const editableElement = this.shadowRoot?.querySelector('.block') as HTMLDivElement;
      if (editableElement) {
        WysiwygBlocks.focusListItem(editableElement);
      }
    }
  }
  

  /**
   * Setup YouTube block functionality
   */
  private setupYouTubeBlock(): void {
    const youtubeBlock = this.shadowRoot?.querySelector('.block.youtube') as HTMLDivElement;
    if (!youtubeBlock) return;
    
    // Handle click to select
    youtubeBlock.addEventListener('click', (e) => {
      const target = e.target as HTMLElement;
      if (!target.classList.contains('youtube-url-input') && !target.classList.contains('youtube-embed-btn')) {
        e.stopPropagation();
        youtubeBlock.focus();
        this.handlers?.onFocus?.();
      }
    });
    
    // Handle URL input and embed button
    const urlInput = youtubeBlock.querySelector('.youtube-url-input') as HTMLInputElement;
    const embedBtn = youtubeBlock.querySelector('.youtube-embed-btn') as HTMLButtonElement;
    
    if (urlInput && embedBtn) {
      const embedVideo = () => {
        const url = urlInput.value.trim();
        if (url) {
          // Extract video ID from YouTube URL
          const videoId = this.extractYouTubeVideoId(url);
          if (videoId) {
            this.block.metadata = { ...this.block.metadata, videoId, url };
            this.block.content = url; // Store URL as content
            
            // Re-render the block
            const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLDivElement;
            if (container) {
              container.innerHTML = this.renderBlockContent();
              this.setupYouTubeBlock(); // Re-setup event handlers
            }
            
            // Notify parent of change
            this.handlers?.onInput?.(new InputEvent('input'));
          } else {
            alert('Invalid YouTube URL');
          }
        }
      };
      
      embedBtn.addEventListener('click', embedVideo);
      urlInput.addEventListener('keydown', (e) => {
        if (e.key === 'Enter') {
          e.preventDefault();
          embedVideo();
        }
      });
    }
    
    // Handle focus/blur
    youtubeBlock.addEventListener('focus', () => this.handlers?.onFocus?.());
    youtubeBlock.addEventListener('blur', () => this.handlers?.onBlur?.());
    
    // Handle keyboard events
    youtubeBlock.addEventListener('keydown', (e) => {
      if (e.key === 'Backspace' || e.key === 'Delete') {
        e.preventDefault();
        this.handlers?.onKeyDown?.(e);
      } else {
        this.handlers?.onKeyDown?.(e);
      }
    });
  }

  /**
   * Setup Markdown block functionality
   */
  private setupMarkdownBlock(): void {
    const markdownBlock = this.shadowRoot?.querySelector('.block.markdown') as HTMLDivElement;
    if (!markdownBlock) return;
    
    // Handle click to select
    markdownBlock.addEventListener('click', (e) => {
      const target = e.target as HTMLElement;
      if (!target.classList.contains('markdown-editor') && !target.classList.contains('toggle-preview')) {
        e.stopPropagation();
        markdownBlock.focus();
        this.handlers?.onFocus?.();
      }
    });
    
    // Handle preview toggle
    const toggleBtn = markdownBlock.querySelector('.toggle-preview') as HTMLButtonElement;
    if (toggleBtn) {
      toggleBtn.addEventListener('click', () => {
        const showPreview = toggleBtn.dataset.active !== 'true';
        this.block.metadata = { ...this.block.metadata, showPreview };
        
        // Re-render
        const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLDivElement;
        if (container) {
          container.innerHTML = this.renderBlockContent();
          this.setupMarkdownBlock();
          
          // If switching to preview, render markdown
          if (showPreview) {
            this.renderMarkdownPreview();
          }
        }
      });
    }
    
    // Handle editor input
    const editor = markdownBlock.querySelector('.markdown-editor') as HTMLTextAreaElement;
    if (editor) {
      editor.addEventListener('input', () => {
        this.block.content = editor.value;
        this.handlers?.onInput?.(new InputEvent('input'));
      });
      
      // Auto-resize textarea
      const autoResize = () => {
        editor.style.height = 'auto';
        editor.style.height = editor.scrollHeight + 'px';
      };
      editor.addEventListener('input', autoResize);
      autoResize();
    }
    
    // Render preview if needed
    if (this.block.metadata?.showPreview) {
      this.renderMarkdownPreview();
    }
    
    // Handle focus/blur
    markdownBlock.addEventListener('focus', () => this.handlers?.onFocus?.());
    markdownBlock.addEventListener('blur', () => this.handlers?.onBlur?.());
    
    // Handle keyboard events
    markdownBlock.addEventListener('keydown', (e) => {
      if (e.key === 'Backspace' || e.key === 'Delete') {
        e.preventDefault();
        this.handlers?.onKeyDown?.(e);
      } else {
        this.handlers?.onKeyDown?.(e);
      }
    });
  }

  /**
   * Setup HTML block functionality
   */
  private setupHtmlBlock(): void {
    const htmlBlock = this.shadowRoot?.querySelector('.block.html') as HTMLDivElement;
    if (!htmlBlock) return;
    
    // Handle click to select
    htmlBlock.addEventListener('click', (e) => {
      const target = e.target as HTMLElement;
      if (!target.classList.contains('html-editor') && !target.classList.contains('toggle-preview')) {
        e.stopPropagation();
        htmlBlock.focus();
        this.handlers?.onFocus?.();
      }
    });
    
    // Handle preview toggle
    const toggleBtn = htmlBlock.querySelector('.toggle-preview') as HTMLButtonElement;
    if (toggleBtn) {
      toggleBtn.addEventListener('click', () => {
        const showPreview = toggleBtn.dataset.active !== 'true';
        this.block.metadata = { ...this.block.metadata, showPreview };
        
        // Re-render
        const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLDivElement;
        if (container) {
          container.innerHTML = this.renderBlockContent();
          this.setupHtmlBlock();
          
          // If switching to preview, render HTML
          if (showPreview) {
            this.renderHtmlPreview();
          }
        }
      });
    }
    
    // Handle editor input
    const editor = htmlBlock.querySelector('.html-editor') as HTMLTextAreaElement;
    if (editor) {
      editor.addEventListener('input', () => {
        this.block.content = editor.value;
        this.handlers?.onInput?.(new InputEvent('input'));
      });
      
      // Auto-resize textarea
      const autoResize = () => {
        editor.style.height = 'auto';
        editor.style.height = editor.scrollHeight + 'px';
      };
      editor.addEventListener('input', autoResize);
      autoResize();
    }
    
    // Render preview if needed
    if (this.block.metadata?.showPreview) {
      this.renderHtmlPreview();
    }
    
    // Handle focus/blur
    htmlBlock.addEventListener('focus', () => this.handlers?.onFocus?.());
    htmlBlock.addEventListener('blur', () => this.handlers?.onBlur?.());
    
    // Handle keyboard events
    htmlBlock.addEventListener('keydown', (e) => {
      if (e.key === 'Backspace' || e.key === 'Delete') {
        e.preventDefault();
        this.handlers?.onKeyDown?.(e);
      } else {
        this.handlers?.onKeyDown?.(e);
      }
    });
  }

  /**
   * Setup Attachment block functionality
   */
  private setupAttachmentBlock(): void {
    const attachmentBlock = this.shadowRoot?.querySelector('.block.attachment') as HTMLDivElement;
    if (!attachmentBlock) return;
    
    // Handle click to select
    attachmentBlock.addEventListener('click', (e) => {
      const target = e.target as HTMLElement;
      if (!target.classList.contains('remove-file')) {
        e.stopPropagation();
        attachmentBlock.focus();
        this.handlers?.onFocus?.();
      }
    });
    
    // Handle file input
    const fileInput = attachmentBlock.querySelector('input[type="file"]') as HTMLInputElement;
    const placeholder = attachmentBlock.querySelector('.attachment-placeholder');
    const addMoreBtn = attachmentBlock.querySelector('.add-more-files') as HTMLButtonElement;
    
    const triggerFileInput = () => {
      if (fileInput) fileInput.click();
    };
    
    if (placeholder) {
      placeholder.addEventListener('click', triggerFileInput);
    }
    
    if (addMoreBtn) {
      addMoreBtn.addEventListener('click', triggerFileInput);
    }
    
    if (fileInput) {
      fileInput.addEventListener('change', async (e) => {
        const files = Array.from((e.target as HTMLInputElement).files || []);
        if (files.length > 0) {
          await this.handleFileAttachments(files);
        }
      });
    }
    
    // Handle file removal
    attachmentBlock.addEventListener('click', (e) => {
      const target = e.target as HTMLElement;
      if (target.classList.contains('remove-file')) {
        const fileId = target.dataset.fileId;
        if (fileId) {
          const files = this.block.metadata?.files || [];
          this.block.metadata = {
            ...this.block.metadata,
            files: files.filter((f: any) => f.id !== fileId)
          };
          
          // Re-render
          const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLDivElement;
          if (container) {
            container.innerHTML = this.renderBlockContent();
            this.setupAttachmentBlock();
          }
          
          this.handlers?.onInput?.(new InputEvent('input'));
        }
      }
    });
    
    // Handle drag and drop
    attachmentBlock.addEventListener('dragover', (e) => {
      e.preventDefault();
      e.stopPropagation();
      attachmentBlock.classList.add('drag-over');
    });
    
    attachmentBlock.addEventListener('dragleave', (e) => {
      e.preventDefault();
      e.stopPropagation();
      attachmentBlock.classList.remove('drag-over');
    });
    
    attachmentBlock.addEventListener('drop', async (e) => {
      e.preventDefault();
      e.stopPropagation();
      attachmentBlock.classList.remove('drag-over');
      
      const files = Array.from(e.dataTransfer?.files || []);
      if (files.length > 0) {
        await this.handleFileAttachments(files);
      }
    });
    
    // Handle focus/blur
    attachmentBlock.addEventListener('focus', () => this.handlers?.onFocus?.());
    attachmentBlock.addEventListener('blur', () => this.handlers?.onBlur?.());
    
    // Handle keyboard events
    attachmentBlock.addEventListener('keydown', (e) => {
      if (e.key === 'Backspace' || e.key === 'Delete') {
        e.preventDefault();
        this.handlers?.onKeyDown?.(e);
      } else {
        this.handlers?.onKeyDown?.(e);
      }
    });
  }

  /**
   * Extract YouTube video ID from URL
   */
  private extractYouTubeVideoId(url: string): string | null {
    const regex = /(?:youtube\.com\/(?:[^\/]+\/.+\/|(?:v|e(?:mbed)?)\/|.*[?&]v=)|youtu\.be\/)([^"&?\/ ]{11})/;
    const match = url.match(regex);
    return match ? match[1] : null;
  }

  /**
   * Render Markdown preview
   */
  private async renderMarkdownPreview(): Promise<void> {
    const preview = this.shadowRoot?.querySelector('.markdown-preview') as HTMLDivElement;
    if (!preview || !this.block.content) return;
    
    // Simple markdown to HTML conversion (you might want to use a proper markdown parser)
    let html = this.block.content
      .replace(/^### (.*$)/gim, '<h3>$1</h3>')
      .replace(/^## (.*$)/gim, '<h2>$1</h2>')
      .replace(/^# (.*$)/gim, '<h1>$1</h1>')
      .replace(/\*\*(.*)\*\*/g, '<strong>$1</strong>')
      .replace(/\*(.*)\*/g, '<em>$1</em>')
      .replace(/\[([^\]]*)\]\(([^\)]*)\)/g, '<a href="$2">$1</a>')
      .replace(/\n/g, '<br>');
    
    preview.innerHTML = html;
  }

  /**
   * Render HTML preview
   */
  private renderHtmlPreview(): void {
    const preview = this.shadowRoot?.querySelector('.html-preview') as HTMLDivElement;
    if (!preview || !this.block.content) return;
    
    // Render HTML in a sandboxed way
    preview.innerHTML = this.block.content;
  }

  /**
   * Handle file attachments
   */
  private async handleFileAttachments(files: File[]): Promise<void> {
    const existingFiles = this.block.metadata?.files || [];
    const newFiles: any[] = [];
    
    for (const file of files) {
      // Convert to base64 for storage (in production, upload to server)
      const reader = new FileReader();
      const base64 = await new Promise<string>((resolve) => {
        reader.onload = (e) => resolve(e.target?.result as string);
        reader.readAsDataURL(file);
      });
      
      newFiles.push({
        id: `file-${Date.now()}-${Math.random().toString(36).substring(2, 9)}`,
        name: file.name,
        size: file.size,
        type: file.type,
        data: base64
      });
    }
    
    this.block.metadata = {
      ...this.block.metadata,
      files: [...existingFiles, ...newFiles]
    };
    
    // Re-render
    const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLDivElement;
    if (container) {
      container.innerHTML = this.renderBlockContent();
      this.setupAttachmentBlock();
    }
    
    this.handlers?.onInput?.(new InputEvent('input'));
  }
  
  /**
   * Get file icon based on mime type
   */
  private getFileIcon(mimeType: string): string {
    if (mimeType.startsWith('image/')) return '🖼️';
    if (mimeType.startsWith('video/')) return '🎥';
    if (mimeType.startsWith('audio/')) return '🎵';
    if (mimeType.includes('pdf')) return '📄';
    if (mimeType.includes('zip') || mimeType.includes('compressed')) return '🗄️';
    if (mimeType.includes('sheet') || mimeType.includes('excel')) return '📊';
    if (mimeType.includes('document') || mimeType.includes('word')) return '📝';
    if (mimeType.includes('presentation') || mimeType.includes('powerpoint')) return '📋';
    if (mimeType.includes('text')) return '📃';
    return '📁';
  }

  /**
   * Format file size to human readable
   */
  private formatFileSize(bytes: number): string {
    if (bytes === 0) return '0 Bytes';
    const k = 1024;
    const sizes = ['Bytes', 'KB', 'MB', 'GB'];
    const i = Math.floor(Math.log(bytes) / Math.log(k));
    return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
  }

  /**
   * Setup image block functionality
   */
  private setupImageBlock(): void {
    const imageBlock = this.shadowRoot?.querySelector('.block.image') as HTMLDivElement;
    if (!imageBlock) return;
    
    // Note: tabindex is already set in the HTML
    
    // Handle click to select the block
    imageBlock.addEventListener('click', (e) => {
      // Don't stop propagation for file input clicks
      if ((e.target as HTMLElement).tagName !== 'INPUT') {
        e.stopPropagation();
        // Focus will trigger the selection
        imageBlock.focus();
        // Ensure focus handler is called immediately
        this.handlers?.onFocus?.();
      }
    });
    
    // Handle click on upload placeholder
    const uploadPlaceholder = imageBlock.querySelector('.image-upload-placeholder');
    const fileInput = imageBlock.querySelector('input[type="file"]') as HTMLInputElement;
    
    if (uploadPlaceholder && fileInput) {
      uploadPlaceholder.addEventListener('click', () => {
        fileInput.click();
      });
      
      fileInput.addEventListener('change', (e) => {
        const file = (e.target as HTMLInputElement).files?.[0];
        if (file) {
          this.handleImageUpload(file);
        }
      });
      
      // Handle drag and drop
      imageBlock.addEventListener('dragover', (e) => {
        e.preventDefault();
        e.stopPropagation();
        uploadPlaceholder.classList.add('drag-over');
      });
      
      imageBlock.addEventListener('dragleave', (e) => {
        e.preventDefault();
        e.stopPropagation();
        uploadPlaceholder.classList.remove('drag-over');
      });
      
      imageBlock.addEventListener('drop', (e) => {
        e.preventDefault();
        e.stopPropagation();
        uploadPlaceholder.classList.remove('drag-over');
        
        const files = e.dataTransfer?.files;
        if (files && files.length > 0) {
          const file = files[0];
          if (file.type.startsWith('image/')) {
            this.handleImageUpload(file);
          }
        }
      });
    }
    
    // Handle focus/blur for the image block
    imageBlock.addEventListener('focus', () => {
      this.handlers?.onFocus?.();
    });
    
    imageBlock.addEventListener('blur', () => {
      this.handlers?.onBlur?.();
    });
    
    // Handle keyboard events
    imageBlock.addEventListener('keydown', (e) => {
      if (e.key === 'Backspace' || e.key === 'Delete') {
        e.preventDefault();
        // Let the keyboard handler in the parent component handle the deletion
        this.handlers?.onKeyDown?.(e);
      } else {
        // Handle navigation keys
        this.handlers?.onKeyDown?.(e);
      }
    });
  }
  
  /**
   * Handle image file upload
   */
  private async handleImageUpload(file: File): Promise<void> {
    // Check file size (max 10MB)
    if (file.size > 10 * 1024 * 1024) {
      alert('Image size must be less than 10MB');
      return;
    }
    
    // Update block to show loading state
    this.block.metadata = { ...this.block.metadata, loading: true };
    const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLDivElement;
    if (container) {
      container.innerHTML = this.renderBlockContent();
      this.setupImageBlock(); // Re-setup event handlers
    }
    
    try {
      // Convert to base64 for now (in production, you'd upload to a server)
      const reader = new FileReader();
      reader.onload = (e) => {
        const base64 = e.target?.result as string;
        
        // Update block with image URL
        this.block.metadata = {
          ...this.block.metadata,
          url: base64,
          loading: false,
          fileName: file.name,
          fileSize: file.size,
          mimeType: file.type
        };
        
        // Set alt text as content
        this.block.content = file.name.replace(/\.[^/.]+$/, ''); // Remove extension
        
        // Re-render
        if (container) {
          container.innerHTML = this.renderBlockContent();
        }
        
        // Notify parent component of the change
        this.handlers?.onInput?.(new InputEvent('input'));
      };
      
      reader.onerror = () => {
        alert('Failed to read image file');
        this.block.metadata = { ...this.block.metadata, loading: false };
        if (container) {
          container.innerHTML = this.renderBlockContent();
          this.setupImageBlock();
        }
      };
      
      reader.readAsDataURL(file);
    } catch (error) {
      console.error('Error uploading image:', error);
      alert('Failed to upload image');
      this.block.metadata = { ...this.block.metadata, loading: false };
      if (container) {
        container.innerHTML = this.renderBlockContent();
        this.setupImageBlock();
      }
    }
  }
  
  /**
   * Gets content split at cursor position
   */
  public getSplitContent(): { before: string; after: string } | null {
    console.log('getSplitContent: Starting...');
    
    // Check if we have a registered handler for this block type
    const handler = BlockRegistry.getHandler(this.block.type);
    console.log('getSplitContent: Checking for handler', { 
      blockType: this.block.type, 
      hasHandler: !!handler,
      hasSplitMethod: !!(handler && handler.getSplitContent)
    });
    
    if (handler && handler.getSplitContent) {
      const container = this.shadowRoot?.querySelector('.wysiwyg-block-container') as HTMLElement;
      console.log('getSplitContent: Found container', { 
        container: !!container,
        containerHTML: container?.innerHTML?.substring(0, 100)
      });
      const context = {
        shadowRoot: this.shadowRoot!,
        component: this
      };
      return handler.getSplitContent(container, context);
    }
    
    // Image blocks can't be split
    if (this.block?.type === 'image') {
      return null;
    }
    
    // Get the actual editable element first
    const editableElement = this.block?.type === 'code' 
      ? this.shadowRoot?.querySelector('.block.code') as HTMLDivElement
      : this.shadowRoot?.querySelector('.block') as HTMLDivElement;
      
    if (!editableElement) {
      console.log('getSplitContent: No editable element found');
      return null;
    }
    
    console.log('getSplitContent: Element info:', {
      blockType: this.block.type,
      innerHTML: editableElement.innerHTML,
      textContent: editableElement.textContent,
      textLength: editableElement.textContent?.length
    });
    
    // Get parent wysiwyg component's shadow root
    const parentComponent = this.closest('dees-input-wysiwyg');
    const parentShadowRoot = parentComponent?.shadowRoot;
    
    // Get selection info with both shadow roots for proper traversal
    const shadowRoots: ShadowRoot[] = [];
    if (parentShadowRoot) shadowRoots.push(parentShadowRoot);
    if (this.shadowRoot) shadowRoots.push(this.shadowRoot);
    
    const selectionInfo = WysiwygSelection.getSelectionInfo(...shadowRoots);
    console.log('getSplitContent: Selection info from shadow DOMs:', {
      selectionInfo,
      shadowRootsCount: shadowRoots.length
    });
    
    if (!selectionInfo) {
      console.log('getSplitContent: No selection, using last known position:', this.lastKnownCursorPosition);
      // Try using last known cursor position
      if (this.lastKnownCursorPosition !== null) {
        const fullText = editableElement.textContent || '';
        const pos = Math.min(this.lastKnownCursorPosition, fullText.length);
        console.log('getSplitContent: Splitting with last known position:', {
          pos,
          fullTextLength: fullText.length,
          before: fullText.substring(0, pos),
          after: fullText.substring(pos)
        });
        return {
          before: fullText.substring(0, pos),
          after: fullText.substring(pos)
        };
      }
      return null;
    }
    
    console.log('getSplitContent: Selection range:', {
      startContainer: selectionInfo.startContainer,
      startOffset: selectionInfo.startOffset,
      startContainerInElement: editableElement.contains(selectionInfo.startContainer)
    });
    
    // Make sure the selection is within this block
    if (!WysiwygSelection.containsAcrossShadowDOM(editableElement, selectionInfo.startContainer)) {
      console.log('getSplitContent: Selection not in this block, using last known position:', this.lastKnownCursorPosition);
      // Try using last known cursor position
      if (this.lastKnownCursorPosition !== null) {
        const fullText = editableElement.textContent || '';
        const pos = Math.min(this.lastKnownCursorPosition, fullText.length);
        return {
          before: fullText.substring(0, pos),
          after: fullText.substring(pos)
        };
      }
      return null;
    }
    
    // For code blocks, use simple text splitting
    if (this.block.type === 'code') {
      const cursorPos = this.getCursorPosition(editableElement) || 0;
      const fullText = editableElement.textContent || '';
      
      console.log('getSplitContent: Code block split:', {
        cursorPos,
        fullTextLength: fullText.length,
        before: fullText.substring(0, cursorPos),
        after: fullText.substring(cursorPos)
      });
      
      return {
        before: fullText.substring(0, cursorPos),
        after: fullText.substring(cursorPos)
      };
    }
    
    // For HTML content, get cursor position first
    const cursorPos = this.getCursorPosition(editableElement);
    console.log('getSplitContent: Cursor position for HTML split:', cursorPos);
    
    if (cursorPos === null || cursorPos === 0) {
      // If cursor is at start or can't determine position, move all content
      console.log('getSplitContent: Cursor at start or null, moving all content');
      return {
        before: '',
        after: editableElement.innerHTML
      };
    }
    
    // For HTML content, split using ranges to preserve formatting
    const beforeRange = document.createRange();
    const afterRange = document.createRange();
    
    // Before range: from start of element to cursor
    beforeRange.setStart(editableElement, 0);
    beforeRange.setEnd(selectionInfo.startContainer, selectionInfo.startOffset);
    
    // After range: from cursor to end of element
    afterRange.setStart(selectionInfo.startContainer, selectionInfo.startOffset);
    afterRange.setEnd(editableElement, editableElement.childNodes.length);
    
    // Extract HTML content
    const beforeFragment = beforeRange.cloneContents();
    const afterFragment = afterRange.cloneContents();
    
    // Convert to HTML strings
    const tempDiv = document.createElement('div');
    tempDiv.appendChild(beforeFragment);
    const beforeHtml = tempDiv.innerHTML;
    
    tempDiv.innerHTML = '';
    tempDiv.appendChild(afterFragment);
    const afterHtml = tempDiv.innerHTML;
    
    console.log('getSplitContent: Final split result:', {
      cursorPos,
      beforeHtml,
      beforeLength: beforeHtml.length,
      beforeHtmlPreview: beforeHtml.substring(0, 100) + (beforeHtml.length > 100 ? '...' : ''),
      afterHtml,
      afterLength: afterHtml.length,
      afterHtmlPreview: afterHtml.substring(0, 100) + (afterHtml.length > 100 ? '...' : '')
    });
    
    return { 
      before: beforeHtml, 
      after: afterHtml 
    };
  }
  
}