public class Action {
  	public static final long DELAI_DEFAULT = 1000;
  	
  	private boolean endAction = true;
  	

  	private int deltaL = 0;
  	private int deltaR = 0;

  	
  	private long delaiL = DELAI_DEFAULT; // in us
  	private long delaiR = DELAI_DEFAULT; // in us
  	
  	public Action() {}

  	public Action(int deltaL, int deltaR) {

  		this.deltaL = deltaL;
  		this.deltaR = deltaR;
  		this.endAction = false;
  	}

  	public Action(int deltaL, int deltaR, long delaiL, long delaiR) {

  		this.deltaL = deltaL;
  		this.deltaR = deltaR;
  		this.delaiL = delaiL;
  		this.delaiR = delaiR;
  		this.endAction = false;
  	}
  

  	public void addDeltaL(int amount){this.deltaL += amount; endAction = false;}
  	public void addDeltaR(int amount){this.deltaR += amount; endAction = false;}
  	public void setDeltaL(int amount){this.deltaL = amount; endAction = false;}
  	public void setDeltaR(int amount){this.deltaR = amount; endAction = false;}
  	public int getDeltaL(){return this.deltaL;}
  	public int getDeltaR(){return this.deltaR;}

  	
  	public void setDelaiL(long delai){this.delaiL = delai; endAction = false;}
  	public void setDelaiR(long delai){this.delaiR = delai; endAction = false;}
  	public long getDelaiL(){return this.delaiL;}
  	public long getDelaiR(){return this.delaiR;}
  	
  	public boolean isEmpty() {return endAction;}
  	
  	public void calculateDelais(long microseconds) {
  		// left
  		double ticksL = (double) microseconds / (double) deltaL;
  		delaiL = (long) (ticksL / 2d); // 1 step = 1 "on state" + 1 "off state"
  		
  		// right
  		double ticksR = (double) microseconds / (double) deltaR;
  		delaiR = (long) (ticksR / 2d);
  		
  		// tests
  		if(delaiL < 50 || delaiR < 50)
  			System.out.println("Warning : delais are very small ! (< 50 us)");
  	}
  	
  	@Override
  	public String toString() {
  		if(endAction)
  			return "End sequence";
  		if(deltaL == 0 && deltaR == 0)
  			return "Pause for " + String.valueOf((double) delaiL / 1000d) + " miliseconds";
  		if(deltaL == 0) {
  			if(deltaR > 0)
  				return "Turning right forward for " + String.valueOf(deltaR) + " steps during " + String.valueOf((double) (deltaR * delaiR) / 1000d) + " miliseconds";
  			else
  				return "Turning right backward for " + String.valueOf(-deltaR) + " steps during " + String.valueOf((double) (-deltaR * delaiR) / 1000d) + " miliseconds";
  		} if(deltaR == 0) {
  			if(deltaL > 0)
  				return "Turning left forward for " + String.valueOf(deltaL) + " steps during " + String.valueOf((double) (deltaL * delaiL) / 1000d) + " miliseconds";
  			else
  				return "Turning left backward for " + String.valueOf(-deltaL) + " steps during " + String.valueOf((double) (-deltaL * delaiL) / 1000d) + " miliseconds";
  		} if(deltaR == deltaL) {
  			if(deltaL > 0)
  				return "Going forward for " + String.valueOf(deltaL) + " steps during " + String.valueOf((double) (deltaL * delaiL) / 1000d) + " miliseconds";
  			else

  				return "Going backward for " + String.valueOf(-deltaL) + " steps during " + String.valueOf((double) (-deltaL * delaiL) / 1000d) + " miliseconds";

  		} if(deltaR == -deltaL) {
  			if(deltaL > 0)
  				return "Turning on the spot clockwise for " + String.valueOf(deltaL) + " steps during "
  					+ String.valueOf((double) (deltaL * delaiL) / 1000d) + " miliseconds";
  			else
  				return "Turning on the spot anti-clockwise for " + String.valueOf(deltaR) + " steps during "
  					+ String.valueOf((double) (deltaR * delaiR) / 1000d) + " miliseconds";
  		}
  		return "Custom curve dL:" + String.valueOf(deltaL) + "steps tL:" + String.valueOf((double) (deltaL * delaiL) / 1000d) + "ms | dR"
  			+ String.valueOf(deltaR) + "steps tR:" + String.valueOf((double) (deltaR * delaiR) / 1000d) + "ms";
  	}
  }