// Debug/UI/WBP_DebugHUD.ts

import type { AC_Movement } from '#root/Movement/Components/AC_Movement.js';
import { SystemLibrary } from '#root/UE/SystemLibrary.ts';
import type { Text } from '#root/UE/Text.ts';
import { TextBlock } from '#root/UE/TextBlock.ts';
import { UserWidget } from '#root/UE/UserWidget.ts';

/**
 * Debug HUD Widget for displaying system information
 * Provides real-time debug information display with multiple pages
 * Part of the deterministic movement system debug infrastructure
 */
export class WBP_DebugHUD extends UserWidget {
  // ════════════════════════════════════════════════════════════════════════════════════════
  //                                    GRAPHS
  // ════════════════════════════════════════════════════════════════════════════════════════

  // ────────────────────────────────────────────────────────────────────────────────────────
  // EventGraph
  // ────────────────────────────────────────────────────────────────────────────────────────

  /**
   * Widget construction event - initializes all text displays
   * Called automatically when widget is created
   */
  EventConstruct(): void {
    this.UpdateHeaderDisplay();
    this.UpdateContentDisplay();
    this.UpdateNavigationDisplay();
  }

  // ════════════════════════════════════════════════════════════════════════════════════════
  //                                    FUNCTIONS
  // ════════════════════════════════════════════════════════════════════════════════════════

  /**
   * Update header text box with current header text
   * @category Display Updates
   */
  private UpdateHeaderDisplay(): void {
    if (SystemLibrary.IsValid(this.HeaderTextBox)) {
      this.HeaderTextBox.SetText(this.HeaderText);
    }
  }

  /**
   * Update content text box with current content text
   * @category Display Updates
   */
  private UpdateContentDisplay(): void {
    if (SystemLibrary.IsValid(this.ContentTextBox)) {
      this.ContentTextBox.SetText(this.ContentText);
    }
  }

  /**
   * Update navigation text box with current navigation text
   * @category Display Updates
   */
  private UpdateNavigationDisplay(): void {
    if (SystemLibrary.IsValid(this.NavigationTextBox)) {
      this.NavigationTextBox.SetText(this.NavigationText);
    }
  }

  /**
   * Set new header text and update display
   * @param NewHeaderText - New title text for current debug page
   * @example
   * // Set movement page header
   * SetHeaderText("Movement Constants")
   * @category Public Interface
   */
  public SetHeaderText(NewHeaderText: Text): void {
    this.HeaderText = NewHeaderText;
    this.UpdateHeaderDisplay();
  }

  /**
   * Set new content text and update display
   * @param NewContentText - New debug content (supports multi-line text)
   * @example
   * // Set movement constants content
   * SetContentText("Max Speed: 600\nAcceleration: 2000\nFriction: 8.0")
   * @category Public Interface
   */
  public SetContentText(NewContentText: Text): void {
    this.ContentText = NewContentText;
    this.UpdateContentDisplay();
  }

  /**
   * Set new navigation text and update display
   * @param NewNavigationText - Navigation instructions and page info
   * @example
   * // Set navigation with page counter
   * SetNavigationText("Page 1/3 | PageUp/PageDown - Navigate")
   * @category Public Interface
   */
  public SetNavigationText(NewNavigationText: Text): void {
    this.NavigationText = NewNavigationText;
    this.UpdateNavigationDisplay();
  }

  // ════════════════════════════════════════════════════════════════════════════════════════
  //                                    VARIABLES
  // ════════════════════════════════════════════════════════════════════════════════════════

  /**
   * Reference to movement component for accessing debug data
   * Set by AC_DebugHUD during initialization
   * @category Components
   */
  public MovementComponent: AC_Movement | null = null;

  /**
   * Current page title text
   * Updated by AC_DebugHUD when switching pages
   * @category PageData
   */
  private HeaderText: Text = 'Debug HUD';

  /**
   * Current page content text
   * Contains the main debug information for current page
   * @category PageData
   */
  private ContentText: Text = 'Text';

  /**
   * Navigation instructions text
   * Shows current page index and navigation controls
   * @category PageData
   */
  private NavigationText: Text = 'Navigation';

  /**
   * Text box widget for displaying page header/title
   * Positioned at top of debug HUD
   * @category UI Components
   */
  private HeaderTextBox = new TextBlock();

  /**
   * Text box widget for displaying main debug content
   * Contains multi-line debug information for current page
   * @category UI Components
   */
  private ContentTextBox = new TextBlock();

  /**
   * Text box widget for displaying navigation help
   * Shows page counter and keyboard shortcuts
   * @category UI Components
   */
  private NavigationTextBox = new TextBlock();
}