using System.Reflection;
using TMPro;
using UnityEngine;
using UnityEngine.UI;

namespace Cielonos.Settings.UI
{
    /// <summary>
    /// 带 [Range] 特性的 int 字段的设置条目 — 使用 Slider + 数值文本。
    /// </summary>
    public class SettingsEntrySlider : SettingsEntryBase
    {
        [SerializeField] private Slider slider;
        [SerializeField] private TMP_Text valueText;

        protected override void SetupUI()
        {
            if (slider == null) return;

            var rangeAttr = fieldInfo.GetCustomAttribute<RangeAttribute>();
            if (rangeAttr != null)
            {
                slider.minValue = rangeAttr.min;
                slider.maxValue = rangeAttr.max;
            }

            slider.wholeNumbers = true;
            slider.onValueChanged.AddListener(OnSliderChanged);
        }

        public override void RefreshValue()
        {
            if (slider == null) return;

            int currentValue = (int)GetFieldValue();
            slider.SetValueWithoutNotify(currentValue);
            UpdateValueText(currentValue);
        }

        private void OnSliderChanged(float value)
        {
            int intValue = Mathf.RoundToInt(value);
            SetFieldValue(intValue);
            UpdateValueText(intValue);
        }

        private void UpdateValueText(int value)
        {
            if (valueText != null)
                valueText.text = value.ToString();
        }

        private void OnDestroy()
        {
            if (slider != null)
                slider.onValueChanged.RemoveListener(OnSliderChanged);
        }
    }
}