// Camera/Tests/FT_CameraRotation.ts

import { AC_Camera } from '#root/Camera/Components/AC_Camera.ts';
import { AC_DebugHUD } from '#root/Debug/Components/AC_DebugHUD.ts';
import { AC_InputDevice } from '#root/Input/Components/AC_InputDevice.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 { MathLibrary } from '#root/UE/MathLibrary.ts';
import { Vector } from '#root/UE/Vector.ts';

/**
 * Functional Test: Camera Rotation Calculations
 * Tests pitch/yaw calculations and rotation accumulation
 * Validates Mario Odyssey-style camera behavior
 */
export class FT_CameraRotation extends FunctionalTest {
  // ════════════════════════════════════════════════════════════════════════════════════════
  //                                    GRAPHS
  // ════════════════════════════════════════════════════════════════════════════════════════

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

  /**
   * Test execution - validates rotation calculations
   * Tests positive/negative input, accumulation, and axis behavior
   */
  EventStartTest(): void {
    // Initialize system
    this.ToastSystemComponent.InitializeToastSystem();
    this.InputDeviceComponent.InitializeDeviceDetection(
      this.ToastSystemComponent,
      this.DebugHUDComponent
    );
    this.CameraComponent.InitializeCameraSystem(
      this.InputDeviceComponent,
      this.DebugHUDComponent
    );

    // Test positive X input (should increase Yaw)
    this.CameraComponent.ProcessLookInput(new Vector(1.0, 0.0, 0.0), 0.016);
    this.CameraComponent.UpdateCameraRotation(0.016);

    const { Pitch: rotation1Pitch, Yaw: rotation1Yaw } =
      this.CameraComponent.GetCameraRotation();

    if (rotation1Yaw > 0) {
      // Test positive Y input (should decrease Pitch due to inversion)
      this.CameraComponent.ProcessLookInput(new Vector(0.0, 1.0, 0.0), 0.016);
      this.CameraComponent.UpdateCameraRotation(0.016);

      const { Pitch: rotation2Pitch, Yaw: rotation2Yaw } =
        this.CameraComponent.GetCameraRotation();

      if (rotation2Pitch < rotation1Pitch) {
        // Test accumulation - second positive X should increase Yaw further
        this.CameraComponent.ProcessLookInput(new Vector(1.0, 0.0, 0.0), 0.016);
        this.CameraComponent.UpdateCameraRotation(0.016);

        const { Pitch: rotation3Pitch, Yaw: rotation3Yaw } =
          this.CameraComponent.GetCameraRotation();

        if (rotation3Yaw > rotation2Yaw) {
          // Test zero input maintains rotation
          this.CameraComponent.ProcessLookInput(
            new Vector(0.0, 0.0, 0.0),
            0.016
          );
          this.CameraComponent.UpdateCameraRotation(0.016);

          const { Pitch: rotation4Pitch, Yaw: rotation4Yaw } =
            this.CameraComponent.GetCameraRotation();

          if (
            MathLibrary.abs(rotation4Yaw - rotation3Yaw) <= 0.01 &&
            MathLibrary.abs(rotation4Pitch - rotation3Pitch) <= 0.01
          ) {
            this.FinishTest(EFunctionalTestResult.Succeeded);
          } else {
            this.FinishTest(
              EFunctionalTestResult.Failed,
              'Zero input should maintain current rotation'
            );
          }
        } else {
          this.FinishTest(
            EFunctionalTestResult.Failed,
            'Multiple inputs should accumulate rotation'
          );
        }
      } else {
        this.FinishTest(
          EFunctionalTestResult.Failed,
          'Positive Y input should decrease Pitch (inverted)'
        );
      }
    } else {
      this.FinishTest(
        EFunctionalTestResult.Failed,
        'Positive X input should increase Yaw'
      );
    }
  }

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

  /**
   * Camera system component - component under test
   * @category Components
   */
  private CameraComponent = new AC_Camera();

  /**
   * Input device detection system - required for camera initialization
   * @category Components
   */
  private InputDeviceComponent = new AC_InputDevice();

  /**
   * Toast notification system - required for input device initialization
   * @category Components
   */
  private ToastSystemComponent = new AC_ToastSystem();

  /**
   * Debug HUD system - displays test status and parameters
   * @category Components
   */
  private DebugHUDComponent = new AC_DebugHUD();
}