package cz.cuni.amis.pogamut.sposh.elements;
   
   /**
    * Class for holding information about frequency of running various parts of
    * POSH plan.
    *
    * @author HonzaH
    */
   public class Freq {
  
      /**
       * Infinite frequency. In order for an event to have this frequency, it
       * would have to occur each 1/inf ms.
       */
      public static Freq INFINITE = new Freq(0, FreqUnits.SECONDS);
  
      /**
       * Compare two frequenties.
       *
       * @param freq1
       * @param freq2
       * @return -1 if freq1 < freq2 0 if freq1 == freq2 1 if freq1 > freq2
       */
      public static int compare(long freq1, long freq2) {
          if (freq1 < freq2) {
              return -1;
          }
          if (freq1 == freq2) {
              return 0;
          }
          return 1;
      }
  
      public static int compare(Freq freq1, Freq freq2) {
          return compare(freq1.tick(), freq2.tick());
      }
  
  	/**
  	 * Units for frequency
  	 * @author HonzaH
  	 */
  	public enum FreqUnits {
  
  		HOURS("hours", 0),
  		MINUTES("minutes", 1),
  		SECONDS("seconds", 2),
  		NONE("none", 3),
  		HZ("hz", 4),
  		PM("pm", 5);
  
  		private final String name;
  		private final int id;
  
  		private FreqUnits(String name, int id) {
  			this.name = name;
  			this.id = id;
  		}
  
  		@Override
  		public String toString() {
  			return name;
  		}
  
  		public int getId() {
  			return id;
  		}
  	}
  	
  	
  	private FreqUnits units;
  	private double ammount;
  
  	Freq() {
  		this.ammount = 0;
  		this.units = FreqUnits.NONE;
  	}
  
  	Freq(double count, FreqUnits units) {
  		this.ammount = count;
                  this.units = units;
  	}
  
  	public Freq(Freq original) {
  		this.ammount = original.ammount;
  		this.units = original.units;
  	}
  
  	@Override
  	public String toString() {
  		if (!FreqUnits.NONE.equals(units)) {
  			return "(" + getUnits() + " " + getAmmount() + ")";
  		}
  		return "";
  	}
  
  	public FreqUnits getUnits() {
  		return units;
  	}
  
 	public void setUnits(FreqUnits units) {
 		this.units = units;
 	}
 
 	public double getAmmount() {
 		return ammount;
 	}
 
 	public void setAmmount(double ammount) {
 		this.ammount = ammount;
 	}
 
     /**
      * How long does one tick lasts
      * @return length of tick in ms
      */
     public long tick() {
         switch (units) {
             case HOURS:
                 return (long) (3600000L * ammount);
             case MINUTES:
                 return (long) (60000L * ammount);
             case SECONDS:
                 return (long) (1000L * ammount);
             case HZ:
                 return (long) (1000L / ammount);
             case PM:
                 return (long) (60000 / ammount);
             case NONE:
                 return (long) ammount;
             default:
                 throw new IllegalStateException("Invalid units.");
         }
     }
 }