#if ENABLE_UNITTESTS

using System;

using UnityEngine;

using NUnit.Framework;
using Framework.Support;

namespace Framework.Camera {

  /// <summary>Unit tests for the utility methods</summary>
  [TestFixture]
  internal class CameraControllerTest {

    #region class TestCameraManager

    /// <summary>Dummy implementation of the camera manager</summary>
    private class TestCameraManager : ICameraManager {

      /// <summary>Triggered when the active camera changes</summary>
      public event EventHandler<CameraEventArgs> CameraChanged {
        add { }
        remove { }
      }

      /// <summary>Camera that is currently active</summary>
      /// <remarks>
      ///   By informing the camera manager about which camera is being used, other services
      ///   such as a background music or ambient sound service can keep their audio sources
      ///   attached to the active camera.
      /// </remarks>
      public UnityEngine.Camera ActiveCamera {
        get { return this.activeCamera; }
        set {
          ++this.activeCameraAssignmentCount;
          this.activeCamera = value;
        }
      }

      /// <summary>Number of times the active camera has been assigned</summary>
      public int ActiveCameraAssignmentCount {
        get { return this.activeCameraAssignmentCount; }
      }

      /// <summary>Camera that is currently active</summary>
      private UnityEngine.Camera activeCamera;
      /// <summary>How often the active camera has been assigned</summary>
      private int activeCameraAssignmentCount;

    }

    #endregion // class TestCameraManager

    /// <summary>
    ///   Verifies that the ground height determination clamps the X coordinate to
    ///   the left side of the ground
    /// </summary>
    [Test]
    public void CameraManagerIsInformed() {
      var manager = new TestCameraManager();
      
      var gameObject = new GameObject("Dummy");
      CameraController controller = gameObject.AddComponent<CameraController>();
      gameObject.AddComponent<UnityEngine.Camera>();

      controller.CallInject(manager);
      controller.InjectOnEnable();

      Assert.That(manager.ActiveCameraAssignmentCount, Is.EqualTo(1));
    }

  }

} // namespace Framework.Camera

#endif // ENABLE_UNITTESTS