/** This is a class to store information about a picture object.
   @author Joanne Selinski
*/
public class Picture {

   /** Default resolution. */
   public static final int PPI = 64;   
   /** Pixels per inch. */
   private static int resolution = PPI;   
   
   /** The width of a picture, in pixels. */
   private int width;
   /** The height of a picture, in pixels. */
   private int height;
   /** A description of the picture. */
   private String subject;

   /** Create a picture object.
      @param w the width, in pixels
      @param h the height, in pixels
      @param s the subject (description) of the picture
   */
   public Picture(int w, int h, String s) {
      this.width = w;
      this.height = h;
      this.subject = s;
   }

   /** Create a picture object.
      @param s contains the subject, width, height in this format
               Subject Matter [width,height]
   */
   public Picture(String s) {      
      int left = s.indexOf('[');
      int right = s.indexOf(']');
      int comma = s.indexOf(',');
      this.subject = s.substring(0, left).trim();
      this.width = Integer.parseInt(s.substring(left + 1, comma).trim());
      this.height = Integer.parseInt(s.substring(comma + 1, right).trim());
   }

   /** Set the pixels/inch for the class.
      @param r the new value
   */
   public static void setResolution(int r) {
      resolution = r;
   }

   /** Get the area of the picture, in pixels.
      @return the area
   */
   public int area() {
      return this.width * this.height;
   }

   /** Get the perimeter of the picture, in inches based on the current
       resolution.
      @return the perimeter
   */
   public double perimeter() {
      return 2 * (this.width + this.height) / (double) resolution;
   }

   /** Make a string containing all the picture data.
      @return the string
   */
   public String toString() {
      return this.subject + " [" + this.width + "," + this.height + "]";
   }

   /** Determine if the picture is in landscape mode.
      @return true if so, false otherwise
   */
   public boolean isLandscape() {
      return this.width >= this.height;
   }

   /** Determine if the picture is in portrait mode.
      @return true if so, false otherwise
   */
   public boolean isPortrait() {
      return this.height >= this.width;
   }

   /** Compare pictures based on their perimeters.
      @param other the picture to compare this to
      @return negative if this < other, 0 if =, positive if this > other
   */
   public int compareTo(Picture other) {
      double d = this.perimeter() - other.perimeter();
      if (d < 0) {
         return -1;
      }
      else if (d > 0) {
         return 1;
      }
      return 0;
   }


}