using Cysharp.Threading.Tasks;

using System.Collections;
using System.Collections.Generic;

using TMPro;

using UniRx;
using UniRx.Triggers;

using UnityEngine;
using UnityEngine.UI;

public class ButtonText : MonoBehaviour
{
    [SerializeField]
    private Button _btn;
    [SerializeField]
    private TextMeshProUGUI _text;

    public Color pressedColor;

    private void Reset()
    {
        this._btn = this.GetComponent<Button>();
        this._text = this.GetComponentInChildren<TextMeshProUGUI>(true);
    }

    private void Start()
    {
        var token = this.GetCancellationTokenOnDestroy();
        this._btn
            .OnPointerDownAsObservable()
            .Subscribe(async _ => {
                var old = this._text.color;
                this._text.color = pressedColor;
                await UniTask.WaitUntil(() => Input.GetMouseButtonUp(0) == true || Input.GetMouseButtonUp(1) == true, cancellationToken: token).SuppressCancellationThrow();
                this._text.color = old;
            })
            .AddTo(this);
    }
}