import java.lang.Math.*;

public class Progressbar {
  private int max;
  private int current;
  private String name;
  private long start;
  private long lastUpdate;

  public Progressbar(int max, String name)
  {
    this.start = System.currentTimeMillis();
    this.name = name;
    this.max = max;
    System.out.println(this.name+":");
    this.printBar(false);
  }

  public void setVal(int i)
  {
    this.current = i;
    if((System.currentTimeMillis() - this.lastUpdate)>1000){
      this.lastUpdate = System.currentTimeMillis();
      this.printBar(false);
    }
  }

  public void finish()
  {
    this.current = this.max;
    this.printBar(true);
  }

  private void printBar(boolean finished)
  {
    double numbar= Math.floor(20*(double)current/(double)max);
    String strbar = "";
    int ii = 0;
    for(ii = 0; ii < numbar; ii++){
      strbar += "=";
    }
    for(ii = (int)numbar; ii < 20; ii++){
      strbar += " ";
    }
    long elapsed = (System.currentTimeMillis() - this.start);
    int seconds = (int)(elapsed / 1000)%60;
    int minutes = (int)(elapsed / 1000)/60;
    String strend = String.format("%02d",minutes)+":"+String.format("%02d",seconds);

    String strETA = "";
    if (elapsed < 2000){
      strETA = "--:--";
    }else{
      long timeETA = elapsed * (long)((double)max/(double)current);
      int ETAseconds = (int)(timeETA /1000)%60;
      int ETAminutes = (int)(timeETA /1000)/60;
      strETA = String.format("%02d",ETAminutes)+":"+String.format("%02d",ETAseconds);
    }
    if(finished){
      strend = "Finished: "+strend+"               ";
    }else{
      strend = "Elapsed: "+strend+" ETA: "+strETA+"   ";
    }
    System.out.print("|"+strbar+"| "+strend);
    if(finished){
      System.out.print("\n");
    }else{
      System.out.print("\r");
    }
  }
}