using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Playables;
using System.Linq;

public class BindObjectOnDemand : MonoBehaviour
{
	[SerializeField] Animator character;
	[SerializeField] PlayableDirector director;

	Coroutine coroutine;

	public IEnumerator PlayAnimation ()
	{
		// キャラクターを生成して、Animatorを取得
		var instantiateCharacter = GameObject.Instantiate (character.gameObject).GetComponent<Animator> ();

		// 取ってきたAnimatorをPlayableDirectorにバインド
		Bind(instantiateCharacter);

		// 再生して、再生終了後に生成したキャラクターを殺す
		director.Play ();
		yield return new WaitUntil (() => director.playableGraph.isDone);
		coroutine = null;
		Destroy (instantiateCharacter.gameObject);
	}

	void Bind(Animator animator)
	{
		// TimelineからCharacterAnimationTrackのトラックへの参照を取得して
		// 生成したAnimator情報を流し込む
		var binding = director.playableAsset.outputs.First (c => c.streamName == "CharacterAnimationTrack");
		director.SetGenericBinding (binding.sourceObject, animator);
	}

	public void Play ()
	{
		if (coroutine == null)
			coroutine = StartCoroutine (PlayAnimation ());
	}
}