// Camera/Tests/FT_CameraLimits.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 Limits and Constraints
 * Tests pitch limits (-89°/+89°) and free yaw rotation
 * Validates clamping behavior and overflow handling
 */
export class FT_CameraLimits extends FunctionalTest {
  // ════════════════════════════════════════════════════════════════════════════════════════
  //                                    GRAPHS
  // ════════════════════════════════════════════════════════════════════════════════════════

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

  /**
   * Test execution - validates pitch/yaw limits
   * Tests boundary conditions and clamping behavior
   */
  EventStartTest(): void {
    // Initialize system
    this.ToastSystemComponent.InitializeToastSystem();
    this.InputDeviceComponent.InitializeDeviceDetection(
      this.ToastSystemComponent,
      this.DebugHUDComponent
    );
    this.CameraComponent.InitializeCameraSystem(
      this.InputDeviceComponent,
      this.DebugHUDComponent
    );

    // Test 1: Test upper pitch limit clamping
    const { PitchMin: pitchMin, PitchMax: pitchMax } =
      this.CameraComponent.CameraSettings;

    for (let i = 0; i < 100; i++) {
      this.CameraComponent.ProcessLookInput(new Vector(0.0, -10.0, 0.0), 0.016);
      this.CameraComponent.UpdateCameraRotation(0.016);
    }

    const rotation1Pitch = this.CameraComponent.GetCameraRotation().Pitch;
    if (rotation1Pitch <= pitchMax + 0.1) {
      // Test 2: Test lower pitch limit clamping
      for (let i = 0; i < 200; i++) {
        this.CameraComponent.ProcessLookInput(
          new Vector(0.0, 10.0, 0.0),
          0.016
        );
        this.CameraComponent.UpdateCameraRotation(0.016);
      }

      const rotation2Pitch = this.CameraComponent.GetCameraRotation().Pitch;
      if (rotation2Pitch >= pitchMin - 0.1) {
        // Test 3: Test free yaw rotation (no limits)
        for (let i = 0; i < 100; i++) {
          this.CameraComponent.ProcessLookInput(
            new Vector(5.0, 0.0, 0.0),
            0.016
          );
          this.CameraComponent.UpdateCameraRotation(0.016);
        }

        const rotation3Yaw = this.CameraComponent.GetCameraRotation().Yaw;
        if (MathLibrary.abs(rotation3Yaw) >= 360.0) {
          // Test 4: Test yaw can go negative
          for (let i = 0; i < 200; i++) {
            this.CameraComponent.ProcessLookInput(
              new Vector(-5.0, 0.0, 0.0),
              0.016
            );
            this.CameraComponent.UpdateCameraRotation(0.016);
          }

          const rotation4Yaw = this.CameraComponent.GetCameraRotation().Yaw;
          if (rotation4Yaw <= -360.0) {
            this.FinishTest(EFunctionalTestResult.Succeeded);
          } else {
            this.FinishTest(
              EFunctionalTestResult.Failed,
              `Yaw should allow negative rotation beyond -360°, got ${rotation4Yaw}°`
            );
          }
        } else {
          this.FinishTest(
            EFunctionalTestResult.Failed,
            `Yaw should allow free rotation beyond 360°, got ${rotation3Yaw}°`
          );
        }
      } else {
        this.FinishTest(
          EFunctionalTestResult.Failed,
          `Pitch ${rotation2Pitch}° below minimum limit ${pitchMin}°`
        );
      }
    } else {
      this.FinishTest(
        EFunctionalTestResult.Failed,
        `Pitch ${rotation1Pitch}° exceeds maximum limit ${pitchMax}°`
      );
    }
  }

  // ════════════════════════════════════════════════════════════════════════════════════════
  //                                    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();
}