using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

public class CommandHandlerUI : MonoBehaviour
{
    [SerializeField, HideInInspector] Button _undoButton;
    [SerializeField, HideInInspector] Button _redoButton;
    [SerializeField, HideInInspector] CommandHandler _commandHandler;

    private void Awake()
    {
        if (_commandHandler == null) return;

        _commandHandler.OnUndoUnavailable += DisableUndoButton;
        _commandHandler.OnRedoUnavailable += DisableRedoButton;
        _commandHandler.OnUndoAvailable += EnableUndoButton;
        _commandHandler.OnRedoAvailable += EnableRedoButton;
    }
    void EnableUndoButton()
    {
        EnableUndoButtonUse(true);
    }
    void DisableUndoButton()
    {
        EnableUndoButtonUse(false);
    }
    void EnableUndoButtonUse(bool enable)
    { if (_undoButton != null)
        {
            _undoButton.interactable = enable;
        }
    }
    void EnableRedoButton()
    {
        EnableRedoButtonUse(true);
    }
    void DisableRedoButton()
    {
        EnableRedoButtonUse(false);
    }
    void EnableRedoButtonUse(bool enable)
    {
        if (_redoButton != null)
        {
            _redoButton.interactable = enable;
        }
    }
}