using Cysharp.Threading.Tasks;

using PMaker.Extension;

using System.Linq;
using System.Threading;

using UnityEngine;

namespace PMaker.Await.UI
{
    public class UISequence : AwaitBehaviour
    {
        public AsyncReactiveProperty<int> current = new AsyncReactiveProperty<int>(0);
        [SerializeField]
        private AwaitBehaviour[] _behaviours;

        private void Reset()
        {
            this._behaviours = this
                .transform
                .Children()
                .Select(_ => {
                    if (_.TryGetComponent<AwaitBehaviour>(out var behaviour) == true)
                    {
                        return behaviour;
                    }
                    else
                    {
                        return null;
                    }
                })
                .Where(x => x != null)
                .ToArray();
        }

        public override async UniTask WaitAsync(CancellationToken cancellationToken = default)
        {
            this.gameObject.SetActive(true);
            foreach (var behaviour in _behaviours)
            {
                await behaviour.WaitAsync(cancellationToken);
                current.Value++;
            }
            this.gameObject.SetActive(false);
        }
    }
}