// Debug/Tests/FT_DebugNavigation.ts

import { AC_DebugHUD } from '#root/Debug/Components/AC_DebugHUD.ts';
import { AC_InputDevice } from '#root/Input/Components/AC_InputDevice.ts';
import { AC_Movement } from '#root/Movement/Components/AC_Movement.ts';
import { AC_ToastSystem } from '#root/Toasts/Components/AC_ToastSystem.ts';
import { EFunctionalTestResult } from '#root/UE/EFunctionalTestResult.ts';
import { FunctionalTest } from '#root/UE/FunctionalTest.ts';
import type { Integer } from '#root/UE/Integer.ts';

/**
 * Functional Test: Debug HUD Navigation System
 * Tests page navigation state management during NextPage/PreviousPage operations
 */
export class FT_DebugNavigation extends FunctionalTest {
  // ════════════════════════════════════════════════════════════════════════════════════════
  //                                    GRAPHS
  // ════════════════════════════════════════════════════════════════════════════════════════

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

  /**
   * Test entry point - validates navigation state during page operations
   * Uses nested validation to ensure CurrentPageIndex stays valid
   */
  EventStartTest(): void {
    this.DebugHUDComponent.InitializeDebugHUD(
      this.MovementComponent,
      this.ToastSystemComponent,
      this.InputDeviceComponent
    );

    this.IfValid('Debug HUD: Navigation invalid initial state', () => {
      this.IfValid(
        'Debug HUD: NextPage failed — Invalid state before NextPage',
        () => {
          this.DebugHUDComponent.NextPage();

          this.IfValid(
            'Debug HUD: NextPage failed — State became invalid after NextPage',
            () => {
              this.DebugHUDComponent.PreviousPage();

              this.IfValid(
                'Debug HUD: PrevPage failed — State became invalid after PreviousPage',
                () => {
                  this.FinishTest(EFunctionalTestResult.Succeeded);
                }
              );
            }
          );
        }
      );
    });
  }

  // ════════════════════════════════════════════════════════════════════════════════════════
  //                                    MACROS
  // ════════════════════════════════════════════════════════════════════════════════════════

  /**
   * Validates current page index and executes callback if state is valid
   * @param Message - Error message if validation fails
   * @param Out - Callback to execute if state is valid
   */
  private IfValid(Message: string, Out: () => void): void {
    const IsPageIndexOutOfBounds = (
      visiblePagesLength: Integer,
      currentPage: Integer
    ): boolean => visiblePagesLength > 0 && currentPage >= visiblePagesLength;

    const IsPageIndexNonNegative = (currentPage: Integer): boolean =>
      currentPage >= 0;

    if (
      !IsPageIndexOutOfBounds(
        this.DebugHUDComponent.GetVisiblePages().length,
        this.DebugHUDComponent.DebugSettings.CurrentPageIndex
      ) &&
      IsPageIndexNonNegative(
        this.DebugHUDComponent.DebugSettings.CurrentPageIndex
      )
    ) {
      Out();
    } else {
      this.FinishTest(EFunctionalTestResult.Failed, Message);
    }
  }

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

  /**
   * Movement system component - required for debug HUD initialization
   * @category Components
   */
  MovementComponent = new AC_Movement();

  /**
   * Debug HUD system - primary component under test
   * Tests page navigation state management
   * @category Components
   */
  DebugHUDComponent = new AC_DebugHUD();

  /**
   * Toast notification system - required for debug HUD initialization
   * @category Components
   */
  ToastSystemComponent = new AC_ToastSystem();

  /**
   * Input device detection system - used for input device debug page testing
   * @category Components
   */
  InputDeviceComponent = new AC_InputDevice();
}