#if HAVE_SLATE

using System;

using UnityEngine;

using Slate;
using Slate.ActionClips;

namespace Framework.Actors {

  /// <summary>Switches an actor presenter to a different state</summary>
  [Category("Actors")]
  [Description("Change the animation state of an actor presenter")]
  public class SetPresenterStateAction : ActorActionClip {

    /// <summary>State to which the actor presenter will be switched</summary>
    public int State;

    /// <summary>Summary of what this action does</summary>
    public override string info {
      get { return "Set State " + this.State.ToString(); }
    }

    /// <summary>Called before the event is played back for the first time</summary>
    protected override void OnEnter() {
      this.actorPresenter = actor.GetComponent<ActorPresenter>();
      if(this.actorPresenter == null) {
        Debug.LogWarning(
          "SetPresenterStateAction used on '" + actor.name + "' could not " +
          "find an ActorPresenter component to set the state on"
        );
        return;
      }

      this.previousState = this.actorPresenter.State;
      this.actorPresenter.State = this.State;
    }

    /// <summary>Called when the action's effects should be reversed</summary>
    /// <remarks>
    ///   Called either after the event has been scrubbed/played in reverse
    ///   or when the stop button is hit after the event was played.
    /// </remarks>
    protected override void OnReverse() {
      if(this.actorPresenter != null) {
        this.actorPresenter.State = this.previousState;
      }
    }

    /// <summary>Actor presenter on which the state was set</summary>
    private ActorPresenter actorPresenter;
    /// <summary>Previous state the actor presenter had been holding</summary>
    private int previousState;

  }

} // namespace Framework.Cinematics

#endif // HAVE_SLATE