using UnityEngine;
using System.Collections;

public enum IgnitionState{
	Lock,
	Acc,
	On,
	Start
}

public interface IIgnitionStateController{
	void SetButtonState (IgnitionSystem sys, int button, bool press);
	void Update (IgnitionSystem sys);
}

public delegate void IgnitionStateCallback(IgnitionSystem caller, IgnitionState oldState, IgnitionState newState);

public class IgnitionSystem : MonoBehaviour {
	private int _ignitionState = 0;
	public bool buttonMode = false;
	private bool _hold = false;
	private IgnitionState _state;
	public event IgnitionStateCallback StateChanged;
	private IgnitionButtonController _buttonController = new IgnitionButtonController();
	private IgnitionSwitchController _switchController = new IgnitionSwitchController();
	private Car _car;
	public Starter starter;
	private PowerBus powerBus;

	public PowerBus PowerBus {
		get {
			return powerBus;
		}
		set {
			powerBus = value;
			starter.SetPowerBus(powerBus);
		}
	}

	 

	public Car Car{
		get{ return _car;}
	}

	public void Attach(Car car){
		_car = car;
	}

	public void Detach(){
		_car = null;
	}

	public void SetButtonState(int button, bool press){
		if (buttonMode) {
			if (_buttonController != null) {
					_buttonController.SetButtonState (this, button, press);
			} else {
					Debug.LogWarning ("Ignition system: button is not installed! Can't press!");
			}
		} else {
			if (_switchController != null) {
				_switchController.SetButtonState (this, button, press);
			} else {
				Debug.LogWarning ("Ignition system: ignition switch is not installed! Can't press!");
			}
		}
	}

	public IgnitionState State{
		get{
			return _state;
		}
		set{
			if (_state == value) {
				return;
			}
			var oldState = _state;
			_state = value;

			Debug.LogFormat("IgnitionStystem: state changed from {0} to {1}", oldState, _state);
			
			if (StateChanged != null) {
				StateChanged(this, oldState, _state);
			}

			starter.On = _state == IgnitionState.Start;
		}

	}
	

	// Use this for initialization
	void Start () {

	}
	
	// Update is called once per frame
	void Update () {
		if (buttonMode) {
			_buttonController.Update (this);
		} else {
			_switchController.Update (this);
		}

	}
}