using DG.Tweening;
using UnityEngine;

namespace DDD
{
    public class FadeUi : MonoBehaviour, IEventHandler<FadeInEvent>, IEventHandler<FadeOutEvent>
    {
        private CanvasGroup _canvasGroup;

        private void Awake()
        {
            _canvasGroup = GetComponent<CanvasGroup>();
            
            _canvasGroup.alpha = 0f;
            _canvasGroup.gameObject.SetActive(false);
            
            EventBus.Register<FadeInEvent>(this);
            EventBus.Register<FadeOutEvent>(this);
        }

        private void OnDestroy()
        {
            EventBus.Unregister<FadeInEvent>(this);
            EventBus.Unregister<FadeOutEvent>(this);
        }

        public async void Invoke(FadeInEvent evt)
        {
            await _canvasGroup.DOFade(0f, evt.Duration)
                .SetUpdate(true)
                .AsyncWaitForCompletion();

            _canvasGroup.blocksRaycasts = false;
            _canvasGroup.gameObject.SetActive(false);
            
            evt.CompletionSource.SetResult(true);
        }

        public async void Invoke(FadeOutEvent evt)
        {
            _canvasGroup.gameObject.SetActive(true);
            _canvasGroup.blocksRaycasts = true;

            await _canvasGroup.DOFade(1f, evt.Duration)
                .SetUpdate(true)
                .AsyncWaitForCompletion();
            
            evt.CompletionSource.SetResult(true);
        }
    }
}