using TMPro;
using UnityEngine;
using UnityEngine.UI;

    [RequireComponent(typeof(TMP_Text))]
    public class ControlTextSize : MonoBehaviour, ILayoutElement
    {
        private TMP_Text curTxt;
        private bool cached = false;

        public float maxPreferredWidth = 0f;
        public float maxPreferredHeight = 0f;

        public float flexibleHeight
        {
            get
            {
                cacheReferences();
                return curTxt.flexibleHeight;
            }
        }

        public float flexibleWidth
        {
            get
            {
                cacheReferences();
                return curTxt.flexibleWidth;
            }
        }

        public int layoutPriority
        {
            get { return 1; }
        }

        public float minHeight
        {
            get
            {
                cacheReferences();
                return curTxt.minHeight;
            }
        }

        public float minWidth
        {
            get
            {
                cacheReferences();
                return curTxt.minWidth;
            }
        }

        public float preferredHeight
        {
            get
            {
                cacheReferences();
                if (Mathf.Approximately(maxPreferredHeight, 0f))
                {
                    return curTxt.preferredHeight;
                }
                else
                {
                    return curTxt.preferredHeight > maxPreferredHeight ? maxPreferredHeight : curTxt.preferredHeight;
                }
            }
        }

        public float preferredWidth
        {
            get
            {
                cacheReferences();
                if (Mathf.Approximately(maxPreferredWidth, 0f))
                {
                    return curTxt.preferredWidth;
                }
                else
                {
                    return curTxt.preferredWidth > maxPreferredWidth ? maxPreferredWidth : curTxt.preferredWidth;
                }
            }
        }

        public void CalculateLayoutInputHorizontal()
        {
            cacheReferences();
        }

        public void CalculateLayoutInputVertical()
        {
            cacheReferences();
        }

        private void cacheReferences()
        {
            if (!cached)
            {
                curTxt = gameObject.GetComponent<TMP_Text>();
                cached = true;
            }
        }
    }