using UnityEngine;
using UnityEngine.UI;

namespace Superlazy.UI
{
    public class SLUIScaleBind : SLUIComponent
    {
        public float bindwidth;
        public float bindHeight;
        public string bind = "";

        private LayoutElement layoutElement;
        private RectTransform rect;

        protected override void Validate()
        {
            layoutElement = GetComponent<LayoutElement>();
            rect = GetComponent<RectTransform>();
        }

        protected override void Init()
        {
        }

        protected override void Enable()
        {
            if (bind != string.Empty)
            {
                SLGame.AddNotify(bindParent.BindPath.CombinePath(bind), OnChange);
            }
            else // 값에 직접바인딩인가?
            {
                SLGame.AddNotify(bindParent.BindPath, OnChange);
            }
        }

        protected override void Disable()
        {
            if (bind != string.Empty)
            {
                SLGame.RemoveNotify(bindParent.BindPath.CombinePath(bind), OnChange);
            }
            else // 값에 직접바인딩인가?
            {
                SLGame.RemoveNotify(bindParent.BindPath, OnChange);
            }
        }

        private void OnChange()
        {
            if (bindParent.Active == false) return;

            double bindValue;
            if (bind != string.Empty)
            {
                bindValue = SLGame.SessionGet(bindParent.BindPath.CombinePath(bind));
            }
            else
            {
                bindValue = SLGame.SessionGet(bindParent.BindPath);
            }

            if (layoutElement)
            {
                if (bindwidth != 0.0f) layoutElement.preferredWidth = bindwidth * (float)bindValue;
                if (bindHeight != 0.0f) layoutElement.preferredHeight = bindHeight * (float)bindValue;
            }
            else
            {
                var size = rect.sizeDelta;
                if (bindwidth != 0.0f) size.x = bindwidth * (float)bindValue;
                if (bindHeight != 0.0f) size.y = bindHeight * (float)bindValue;

                rect.sizeDelta = size;
            }
        }
    }
}