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

/// <summary>
/// 状态模式的状态管理员基类，每一组状态的管理员都必须继承这个类
/// </summary>
public class StateMachineBase : MonoBehaviour
{
    protected StateBase currentState;
    protected bool isBegin = false;
    /// <summary>
    /// 改变状态的时候调用
    /// </summary>
    /// <param name="newState"></param>
    public void ChangeState(StateBase newState)
    {
        isBegin = false;
        if (currentState != null)
        {
            currentState.End();
        }
        currentState = newState;
    }

    /// <summary>
    /// 状态的每一帧调用，需要手动安排到主程序的Update中，切记！
    /// </summary>
    public void StateUpdate()
    {
        if (currentState != null)
        {
            if (!isBegin)
            {
                currentState.Enter();
                isBegin = true;
            }
            currentState.StateUpdate();
        }
    }
}