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

import { WysiwygFormatting } from './wysiwyg.formatting.js';

declare global {
  interface HTMLElementTagNameMap {
    'dees-formatting-menu': DeesFormattingMenu;
  }
}

@customElement('dees-formatting-menu')
export class DeesFormattingMenu extends DeesElement {
  private static instance: DeesFormattingMenu;
  
  public static getInstance(): DeesFormattingMenu {
    if (!DeesFormattingMenu.instance) {
      DeesFormattingMenu.instance = new DeesFormattingMenu();
      document.body.appendChild(DeesFormattingMenu.instance);
    }
    return DeesFormattingMenu.instance;
  }

  @state()
  public visible: boolean = false;

  @state()
  private position: { x: number; y: number } = { x: 0, y: 0 };

  private callback: ((command: string) => void | Promise<void>) | null = null;

  public static styles = [
    cssManager.defaultStyles,
    css`
      :host {
        position: fixed;
        z-index: 10000;
        pointer-events: none;
      }

      .formatting-menu {
        position: absolute;
        background: ${cssManager.bdTheme('#ffffff', '#262626')};
        border: 1px solid ${cssManager.bdTheme('#e0e0e0', '#404040')};
        border-radius: 6px;
        box-shadow: 0 2px 16px rgba(0, 0, 0, 0.15);
        padding: 4px;
        display: flex;
        gap: 2px;
        pointer-events: auto;
        user-select: none;
        animation: fadeInScale 0.15s ease-out;
      }

      @keyframes fadeInScale {
        from {
          opacity: 0;
          transform: scale(0.95) translateY(5px);
        }
        to {
          opacity: 1;
          transform: scale(1) translateY(0);
        }
      }

      .format-button {
        width: 32px;
        height: 32px;
        border: none;
        background: transparent;
        cursor: pointer;
        border-radius: 4px;
        transition: all 0.15s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        color: ${cssManager.bdTheme('#000000', '#e0e0e0')};
        font-weight: 600;
        font-size: 14px;
        position: relative;
      }

      .format-button:hover {
        background: ${cssManager.bdTheme('#f0f0f0', '#333333')};
        color: ${cssManager.bdTheme('#0066cc', '#4d94ff')};
      }

      .format-button:active {
        transform: scale(0.95);
      }

      .format-button.bold {
        font-weight: 700;
      }

      .format-button.italic {
        font-style: italic;
      }

      .format-button.underline {
        text-decoration: underline;
      }

      .format-button .code-icon {
        font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
        font-size: 12px;
      }
    `,
  ];

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

    return html`
      <div 
        class="formatting-menu" 
        style="left: ${this.position.x}px; top: ${this.position.y}px;"
        tabindex="-1"
        @mousedown="${(e: MouseEvent) => {
          // Prevent focus loss
          e.preventDefault();
          e.stopPropagation();
        }}"
        @click="${(e: MouseEvent) => {
          e.preventDefault();
          e.stopPropagation();
        }}"
        @focus="${(e: FocusEvent) => {
          // Prevent menu from taking focus
          e.preventDefault();
          e.stopPropagation();
        }}"
      >
        ${WysiwygFormatting.formatButtons.map(button => html`
          <button 
            class="format-button ${button.command}"
            @click="${() => this.applyFormat(button.command)}"
            title="${button.label}${button.shortcut ? ` (${button.shortcut})` : ''}"
          >
            <span class="${button.command === 'code' ? 'code-icon' : ''}">${button.icon}</span>
          </button>
        `)}
      </div>
    `;
  }

  private applyFormat(command: string): void {
    if (this.callback) {
      this.callback(command);
    }
    // Don't hide menu after applying format (except for link)
    if (command === 'link') {
      this.hide();
    }
  }

  public show(position: { x: number; y: number }, callback: (command: string) => void | Promise<void>): void {
    console.log('FormattingMenu.show called:', { position, visible: this.visible });
    this.position = position;
    this.callback = callback;
    this.visible = true;
    console.log('FormattingMenu.show - visible set to:', this.visible);
  }

  public hide(): void {
    this.visible = false;
    this.callback = null;
  }

  public updatePosition(position: { x: number; y: number }): void {
    this.position = position;
  }
}