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

namespace Stary.Evo.FiniteStateMachine
{
    public interface IState
    {
        public FSMController Machine { get; set; }
        public void OnEnter();
        public void OnExit();
        public void Update();
        public void FixedUpdate();
        public void OnInit();
        public void OnDestory();

    }

    public abstract class AbstractState : IState
    {
        public FSMController Machine { get; set; }
        public abstract void OnEnter();
        public abstract void OnExit();
        public abstract void Update();
        public abstract void FixedUpdate();
        public abstract void OnInit();
        public abstract void OnDestory();
    }

    /// <summary>
    /// 状态中具体行为：
    /// （OnInitAction：初始化）
    /// （OnEnterAction：进入）
    /// （UpdateAction：循环）
    /// （FixedUpdateAction：后循环）
    /// （OnExitAction：离开）
    /// （OnDestoryAction：销毁）
    /// </summary>
    public struct StateDateAction
    {
        public System.Action OnEnterAction;
        public System.Action OnExitAction;
        public System.Action UpdateAction;
        public System.Action FixedUpdateAction;
        public System.Action OnInitAction;
        public System.Action OnDestoryAction;
    }

    /// <summary>
    /// 单个状态
    /// </summary>
    public class SingleState : AbstractState
    {
        public StateDateAction stateDate;
        public bool IsRunning;

        public override void FixedUpdate()
        {
            stateDate.FixedUpdateAction?.Invoke();
        }

        public override void OnDestory()
        {
            stateDate.OnDestoryAction?.Invoke();
        }

        public override void OnEnter()
        {
            stateDate.OnEnterAction?.Invoke();
        }

        public override void OnExit()
        {
            stateDate.OnExitAction?.Invoke();
        }

        public override void OnInit()
        {
            stateDate.OnInitAction?.Invoke();
        }

        public override void Update()
        {
            stateDate.UpdateAction?.Invoke();
        }
    }
}