/* Day.java - store climate information about a single day.
 * Attributes are the raw data:  high and low temperature, and amount of rain.
 */
public class Day
{
  private int dayNumber;
  private int high;
  private int low;
  private double rain;
  private static final double COMFORT = 65.0;

  public Day(int dayNumber, int high, int low, double rain)
  {
    this.dayNumber = dayNumber;
    this.high = high;
    this.low = low;
    this.rain = rain;
  }

  // Let's have a way of printing the values of one day.
  public String toString()
  {
    return String.format("day %d, high %d, low %d, rain = %.2f\n",
                         dayNumber, high, low, rain);
  }

  // findAverage() - the average of the high and low
  public double findAverage()
  {
    return 0.5 * (high + low);
  }

  // findHeat - We need heat if the average temperature is less than 65.
  // For each degree it's less than 65, this is an extra "degree day".
  // So the formula is:  65 - average temp.
  //   However, if the average temp is above 65, we need no heat:  return 0.
  // But we shouldn't hard code the constant 65.  We may want to change
  // the comfort threshold to some other value.  Use a named constant.
  public double findHeat()
  {
    if (findAverage() < COMFORT)
      return COMFORT - findAverage();
    else
      return 0.0;
  }

  // findAC is analogous
  public double findAC()
  {
    if (findAverage() > COMFORT)
      return findAverage() - COMFORT;
    else
      return 0.0;
  }

  // "get" functions, to return attribute values
  public int getHigh()
  {
    return high;
  }

  public int getLow()
  {
    return low;
  }

  public double getRain()
  {
    return rain;
  }
}