using Cysharp.Threading.Tasks;

using Sirenix.OdinInspector;

using System.Threading;

using UnityEngine;
using UnityEngine.Playables;

namespace PMaker.Await
{
    [RequireComponent(typeof(PlayableDirector))]
    public class AwaitTimeline : AwaitBehaviour
    {
        [SerializeField]
        private PlayableDirector _director;

        private void Reset()
        {
            this._director = GetComponent<PlayableDirector>();
        }

        public void OnEnd()
        {
            this.SetTrue();
        }

        public override async UniTask WaitAsync(CancellationToken cancellationToken = default)
        {
            this.SetFalse();
            _director.time = 0;
            _director.Play();
            await this.WaitTrue(cancellationToken);
            if (cancellationToken.IsCancellationRequested)
            {
                _director.Stop();
            }
        }

        public async UniTask WaitStep(CancellationToken cancellationToken = default)
        {
            if (_director.state != PlayState.Playing && (_director.time == 0 || _director.time == _director.duration))
            {
                _director.time = 0;
                _director.Play();
            }
            else
            {
                _director.Resume();
            }
            this.SetFalse();
            await this.WaitTrue(cancellationToken);
            _director.Pause();
        }

        public async UniTask WaitStep(float time, CancellationToken cancellationToken = default)
        {
            if (_director.time == 0 || _director.state != PlayState.Paused)
            {
                _director.time = time;
                _director.Play();
            }
            else
            {
                _director.time = time;
                _director.Resume();
            }
            this.SetFalse();
            await this.WaitTrue(cancellationToken);
            _director.Pause();
        }

        [Button]
        [HideInEditorMode]
        public async UniTask WaitStepTest()
        {
            await this.WaitStep(this.GetCancellationTokenOnDestroy());
        }
    }
}