using System;
using UnityEngine.Events;
using UnityEngine.UI;

namespace AibisDream
{
    public class BaseButton : Button
    {
        public SelectionType CurSelectionState => TransStateToType(currentSelectionState);

        public UnityEvent<SelectionType, bool> onStateTransition = new();
        
        protected override void DoStateTransition(SelectionState state, bool instant)
        {
            if (!gameObject.activeInHierarchy)
                return;

            base.DoStateTransition(state, instant);
            onStateTransition?.Invoke(TransStateToType(state), instant);
        }

        protected static SelectionType TransStateToType(SelectionState state)
        {
            return Enum.Parse<SelectionType>(state.ToString());
        }
    }

    /// <summary>
    /// 因为作用域问题把枚举转出来用
    /// </summary>
    public enum SelectionType
    {
        /// <summary>
        /// The UI object can be selected.
        /// </summary>
        Normal,

        /// <summary>
        /// The UI object is highlighted.
        /// </summary>
        Highlighted,

        /// <summary>
        /// The UI object is pressed.
        /// </summary>
        Pressed,

        /// <summary>
        /// The UI object is selected
        /// </summary>
        Selected,

        /// <summary>
        /// The UI object cannot be selected.
        /// </summary>
        Disabled
    }
}