/*
Summary Info:  Design a storage tank and fill it up
Programmer:  Kathy Piggford
Date Due:    4/18/2014
Date Completed: 4//14
*/


public class StorageTank {  //declare private variables

  private double length;
  private double width;
  private double height;
  private double capacity;
  private double currentGallons;
  private boolean isAdd;
  private boolean isRemove;


  public StorageTank() {  //create default constructor
    length = 0.0;
    width = 0.0;
    height = 0.0;
    capacity = 0.0;
  }

  //create new length, width, and height for default constructor
  public double getLength() {
    return length;
  }
 
  public void setLength(double newLength) {
    length = newLength;
  } 
  public double getwidth() {
    return width;
  }
 
  public void setWidth(double newWidth) {
    width = newWidth;
  }

  public double getHeight() {
    return height;
  }
 
  public void setHeight(double newHeight) {
    height = newHeight;
  }

  //create overloaded constructor
  public StorageTank(double newLength, double newWidth, double newHeight) {
    this.length = newLength;
    this.width = newWidth;
    this.height = newHeight;
  }

  //create conversion constant
  public static final double CONVERTER = 7.48;

  //calculate the total capacity of the tank
   double getCapacity() {
    return (length * width * height) * CONVERTER;
  }

  private void setCapacity(double volume) {
    this.capacity = capacity;
    capacity = volume;

  }

  //keep track of current gallons
  private void setCurrentGallons(double volume) {
    this.currentGallons = currentGallons;
    currentGallons = volume;

  }
 
  public double getCurrentGallons() {
    return currentGallons;
}

  //boolean value to check if adding more gallons will cause overflow
  public boolean add(double gallons) {
    if (gallons < 0.0)
      isAdd = false;

    double overflow = (gallons + currentGallons) - capacity;

    if (overflow > 0.0)
      isAdd = false;
      else
      currentGallons += gallons;


     System.out.println("Current add gallons is " + currentGallons);


      return isAdd;
  }
     
   //boolean value to check if removing gallons will cause underflow
  public boolean remove(double gallons) {
    if (gallons < 0.0)
      isRemove = false;

    double underflow = gallons - currentGallons;

    if (underflow > 0.0)
      isRemove = false;
      else
      currentGallons -= gallons;

     System.out.println("Current remove gallons is " + currentGallons);

      return isRemove;
  }

  //calculate the percent full of the tank
  double getPercentFull() {
    return (currentGallons / capacity) * 100;
  }

}