using System;

using UnityEngine;

namespace Framework.Dialogue2 {

  /// <summary>Manages animations on the widgets of a dialogue canvas</summary>
  public class UGuiDialogueAnimator {

    /// <summary>Initialized a new UGui dialogue widget animator</summary>
    /// <param name="dialogueWidgets">
    ///   Dialogue widget controller through which the widgets will be accessed
    /// </param>
    public UGuiDialogueAnimator(UGuiDialogueWidgets dialogueWidgets) {
      this.dialogueWidgets = dialogueWidgets;
    }

    /// <summary>Called after the widget controller has been constructed</summary>
    public virtual void Initialize() {
    }

    /// <summary>Plays the appear animation for the dialogue canvas</summary>
    /// <param name="speech">Speech the dialogue canvas should display</param>
    /// <param name="choices">Choices the should be available to the player</param>
    /// <returns>An asynchronous task that reports when the animation has completed</returns>
    public virtual Async.IAsyncTask PlayAppearAnimation(
      IDialogueText speech, ArraySegment<IDialogueText> choices
    ) {
      return null;
    }

    public virtual Async.IAsyncTask PlayHideAnimation(int selectedChoiceIndex) {
      return null;
    }

    public virtual Async.IAsyncTask PlayMoveAnimation(
      Vector3 sourcePosition, Quaternion sourceOrientation,
      Vector3 targetPosition, Quaternion targetOrientation
    ) {
      return null;
    }

    // CreateAppearAnimation
    // CreateHideAnimation
    // CreateMoveAnimation
    // HighlightChoice

    /// <summary>Controller through which widgets are accessed</summary>
    private UGuiDialogueWidgets dialogueWidgets;

  }

} // namespace Framework.Dialogue2