using UnityEngine;

namespace AlicizaX.AnimationFlow.Runtime {
    [Category("Animation")]
    public class CanvasGroupAlphaTo : ActionNode {
        public float duration = 1f;
        public EaseType easyType;
        public CanvasGroup target;
        public bool setFrom;
        public float from;
        public float to;

        protected float orgValue;
        protected float enterValue;

        public override void OnInit()
        {
            orgValue = target.alpha;
        }

        public override void OnReset()
        {
            target.alpha = orgValue;
        }
        
        public override void OnEnter() {
            if (setFrom) {
                target.alpha = from;
            }
            enterValue = target.alpha;
        }

        public override void OnUpdate(float dt) {
            target.alpha = Easing.Ease(easyType, enterValue, to, elapsedTime / duration);
        }

        public override bool Valid() {
            return target != null && duration > 0;
        }

        public override float Duration() {
            return duration;
        }

        public override bool HasSubTitle() {
            return true;
        }

        public override string SubTitle() {
            return target != null ? target.name : null;
        }
    }
}