using System;
using UnityEngine;

namespace AlicizaX.UI
{
    /// <summary>
    /// CanvasGroup 透明度状态控制
    /// 控制 CanvasGroup 的 Alpha 值
    /// </summary>
    [Serializable]
    [ControlerStateName("CanvasGroup/Alpha")]
    [ControlerStateAttachType(true)]
    public class CanvasGroupAlphaState : ControllerStateBase
    {
        [SerializeField] [Range(0f, 1f)] private float _alpha = 1f;
        [HideInInspector] [SerializeField] private float _defaultAlpha;

        public override void Init(UXControllerStateRecorder recorder)
        {
            if (recorder != null && recorder.TryGetComponent<CanvasGroup>(out var canvasGroup))
            {
                _defaultAlpha = canvasGroup.alpha;
            }
        }

        public override void Execute(UXControllerStateRecorder recorder, int entryIndex, int selectionIndex)
        {
            if (recorder != null && recorder.TryGetComponent<CanvasGroup>(out var canvasGroup))
            {
                canvasGroup.alpha = (entryIndex == selectionIndex) ? _alpha : _defaultAlpha;
            }
        }

        public override bool Valid(UXControllerStateRecorder recorder)
        {
            return recorder != null && recorder.GetComponent<CanvasGroup>() != null;
        }

        public override string GetDescription()
        {
            return $"匹配时: 透明度={_alpha:F2}, 默认={_defaultAlpha:F2}";
        }
    }
}