using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;

namespace TheraBytes.BetterUi
{
#if UNITY_2018_3_OR_NEWER
    [ExecuteAlways]
#else
    [ExecuteInEditMode]
#endif
    public abstract class ResolutionSizer<T> : UIBehaviour, ILayoutController, ILayoutSelfController, IResolutionDependency
    {
        protected abstract ScreenDependentSize<T> sizer { get; }
        
        public virtual void SetLayoutHorizontal()
        {
            UpdateSize();
        }

        public virtual void SetLayoutVertical()
        {
            UpdateSize();
        }

        protected override void OnEnable()
        {
            base.OnEnable();
            UpdateSize();
        }

#if UNITY_EDITOR
        protected override void OnValidate()
        {
            this.SetDirty();
        }
#endif

        protected void SetDirty()
        {
            if (!(this.isActiveAndEnabled))
            {
                return;
            }

            this.UpdateSize();
        }

        protected override void OnRectTransformDimensionsChange()
        {
            base.OnRectTransformDimensionsChange();
            UpdateSize();
        }
        
        void UpdateSize()
        {
            if(!(isActiveAndEnabled))
            {
                return;
            }

            T newSize = sizer.CalculateSize(this);
            this.ApplySize(newSize);
        }

        protected abstract void ApplySize(T newSize);

        public void OnResolutionChanged()
        {
            UpdateSize();
        }
    }

}