using UnityEngine;
using System.Collections;
using MonsterLove.StateMachine;

public class ExampleBasic : MonoBehaviour
{
	//Declare which states we'd like use
	public enum States
	{
		Init,
		Countdown,
		Play,
		Win,
		Lose
	}

	public float health = 100;
	public float damage = 20;

	private float startHealth;

	private StateMachine<States, StateDriverUnity> fsm;

	private void Awake()
	{
		startHealth = health;

		//Initialize State Machine Engine		
		fsm = new StateMachine<States, StateDriverUnity>(this);
		fsm.ChangeState(States.Init);
	}

	void Update()
	{
		fsm.Driver.Update.Invoke();
	}

	void OnGUI()
	{
		GUILayout.BeginArea(new Rect(50,50,120,40));

		fsm.Driver.OnGUI.Invoke();
		
		GUILayout.EndArea();
	}

	void Init_Enter()
	{
		Debug.Log("Waiting for start button to be pressed");
	}

	void Init_OnGUI()
	{
		if(GUILayout.Button("Start"))
		{
			fsm.ChangeState(States.Countdown);
		}
	}

	//We can return a coroutine, this is useful animations and the like
	IEnumerator Countdown_Enter()
	{
		health = startHealth;

		Debug.Log("Starting in 3...");
		yield return new WaitForSeconds(0.5f);
		Debug.Log("Starting in 2...");
		yield return new WaitForSeconds(0.5f);
		Debug.Log("Starting in 1...");
		yield return new WaitForSeconds(0.5f);

		fsm.ChangeState(States.Play);
	}

	void Countdown_OnGUI()
	{
		GUILayout.Label("Look at Console");
	}

	void Play_Enter()
	{
		Debug.Log("FIGHT!");
	}

	void Play_Update()
	{
		health -= damage * Time.deltaTime;
	
		if(health < 0)
		{
			fsm.ChangeState(States.Lose);
		}
	}

	void Play_OnGUI()
	{
		if(GUILayout.Button("Make me win!"))
		{
			fsm.ChangeState(States.Win);
		}
			
		GUILayout.Label("Health: " + Mathf.Round(health).ToString());
	}

	void Play_Exit()
	{
		Debug.Log("Game Over");
	}

	void Lose_Enter()
	{
		Debug.Log("Lost");
	}
	
	void Lose_OnGUI()
	{
		if(GUILayout.Button("Play Again"))
		{
			fsm.ChangeState(States.Countdown);
		}
	}

	void Win_Enter()
	{
		Debug.Log("Won");
	}

	void Win_OnGUI()
	{
		if(GUILayout.Button("Play Again"))
		{
			fsm.ChangeState(States.Countdown);
		}
	}
}