ZhenShiXunYouJi2/Assets/Scripts/FiniteStateMachine.cs

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

public class FiniteStateMachine : MonoBehaviour
{
	//[DebuggerBrowsable(DebuggerBrowsableState.Never)]
	public event FiniteStateMachine.StatesInitializedEventHandler StatesInitializedEvent;

	private void FireStatesInitializedEvent()
	{
		if (this.StatesInitializedEvent != null)
		{
			this.StatesInitializedEvent();
		}
	}

	//[DebuggerBrowsable(DebuggerBrowsableState.Never)]
	public event FiniteStateMachine.StateSwitched StateSwitchedEvent;

	private void FireStateSwitchedEvent(State oldState, State newState)
	{
		if (this.StateSwitchedEvent != null)
		{
			this.StateSwitchedEvent(oldState, newState);
		}
	}

	private void Start()
	{
		this.InitStatesDict();
		this.SwitchState(this._startState);
		this.AreStatesInitialized = true;
		this.FireStatesInitializedEvent();
	}

	public State CurrentState { get; private set; }

	public bool AreStatesInitialized { get; private set; }

	public State GetState(Type stateType)
	{
		if (!this._statesDict.ContainsKey(stateType.Name))
		{
			UnityEngine.Debug.LogError(string.Format("Requested state {0} does not exist.", stateType.Name));
			return null;
		}
		return this._statesDict[stateType.Name];
	}

	public T GetState<T>() where T : State
	{
		State state = this.GetState(typeof(T));
		return state as T;
	}

	public void SwitchState(string newStateName)
	{
		if (string.IsNullOrEmpty(newStateName))
		{
			UnityEngine.Debug.LogError("FiniteStateMachine.SwitchState() new state name not valid");
			return;
		}
		if (!this._statesDict.ContainsKey(newStateName))
		{
			UnityEngine.Debug.LogError(string.Format("Requested state {0} does not exist.", newStateName));
			return;
		}
		if (this.CurrentState != null && newStateName == this.CurrentState.GetType().Name)
		{
			UnityEngine.Debug.Log(string.Format("FSM is already in state {0} and cannot switch.", newStateName));
			return;
		}
		State currentState = this.CurrentState;
		State state = this._statesDict[newStateName];
		if (this.CurrentState)
		{
			this.CurrentState.Leave(state);
			this.CurrentState.enabled = false;
		}
		GameEvents.Invoke<UnemiShouldCloseEvent>(new UnemiShouldCloseEvent(this));
		this.CurrentState = state;
		this.CurrentState.enabled = true;
		this.CurrentState.Enter(currentState);
		if (this.CurrentState is PopupBaseState)
		{
			this.CurrentState.transform.parent.SetAsLastSibling();
		}
		this.FireStateSwitchedEvent(currentState, state);
	}

	public T SwitchState<T>() where T : State
	{
		this.SwitchState(typeof(T).Name);
		return this.CurrentState as T;
	}

	public void SwitchState(State s)
	{
		if (s == null)
		{
			UnityEngine.Debug.LogError("Cannot switch to a null state.");
		}
		else
		{
			this.SwitchState(s.GetType().Name);
		}
	}

	private void InitStatesDict()
	{
		this._statesDict.Clear();
		int i = 0;
		int num = this._states.Length;
		while (i < num)
		{
			State state = this._states[i];
			string name = state.GetType().Name;
			if (!this._statesDict.ContainsKey(name))
			{
				this._statesDict.Add(name, state);
				state.fsm = this;
				state.enabled = false;
				state.Init();
			}
			i++;
		}
	}

	[SerializeField]
	private State[] _states;

	[SerializeField]
	private State _startState;

	private readonly Dictionary<string, State> _statesDict = new Dictionary<string, State>();

	public delegate void StatesInitializedEventHandler();

	public delegate void StateSwitched(State oldState, State newState);
}