using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace VMdemo.UI
{
    [RequireComponent(typeof(RectTransform))]
    public class TimelineLogItemAutoSize : MonoBehaviour
    {
        [SerializeField] private TMP_Text textComponent;
        [SerializeField] private float horizontalPadding = 20f;
        [SerializeField] private float verticalPadding = 12f;
        [SerializeField] private bool clampToParentWidth = true;
        [SerializeField] private float minWidth = 80f;
        [SerializeField] private float minHeight = 30f;

        public void RefreshLayout()
        {
            var text = textComponent != null ? textComponent : GetComponent<TMP_Text>();
            var root = (RectTransform)transform;
            if (text == null)
            {
                return;
            }

            float maxWidth = float.PositiveInfinity;
            if (clampToParentWidth && root.parent is RectTransform parentRect)
            {
                maxWidth = Mathf.Max(1f, parentRect.rect.width - horizontalPadding);
            }

            var preferred = text.GetPreferredValues(text.text, maxWidth, 0f);
            var width = Mathf.Max(minWidth, preferred.x + horizontalPadding);
            var height = Mathf.Max(minHeight, preferred.y + verticalPadding);

            if (clampToParentWidth && root.parent is RectTransform p)
            {
                width = Mathf.Min(width, Mathf.Max(minWidth, p.rect.width));
            }

            root.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, width);
            root.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, height);

            var layoutElement = GetComponent<LayoutElement>();
            if (layoutElement != null)
            {
                layoutElement.preferredWidth = width;
                layoutElement.preferredHeight = height;
            }
        }
    }
}