using UnityEngine;
using System.Collections;

public enum PowerBusType{
	Acc = 0,
	On = 1
}

public class CarElectricSystem : MonoBehaviour {

	public IElecticEnergySource energySource;
	public IgnitionSystem ignition;
	private PowerBus[] _powerBus;

	// Use this for initialization
	void Start () {

		//create electric power buses
		_powerBus = new PowerBus[]{new PowerBus(), new PowerBus()};
		foreach (var bus in _powerBus) {
			bus.ElectricSystem = this;
		}

		//attach to ignition system
		if (ignition != null) {
			ignition.PowerBus = _powerBus [(int)PowerBusType.On];
			ignition.StateChanged += HandleIgnitionStateChanged;
		} else {
			Debug.LogWarning("Electric system: no ignition system attached");
		}
	}

	void HandleIgnitionStateChanged (IgnitionSystem caller, IgnitionState oldState, IgnitionState newState){
		_powerBus [(int)PowerBusType.Acc].Enabled = newState != IgnitionState.Lock;
		_powerBus [(int)PowerBusType.On].Enabled = (newState != IgnitionState.Lock) && (newState != IgnitionState.Acc);
	}

	public PowerBus GetPowerBus(PowerBusType busType){
		return _powerBus[(int)busType];
	}
	
	// Update is called once per frame
	void Update () {
	
	}
}