// FigureDisplayer.java
// A solution to CS 10, assignment 4, part 3, Fall 2008
// cmc, updated 11/1/08

import java.util.ArrayList;
import java.util.Random;
import java.util.Collections;

/**
   Displays a user-specified number of printed rectangles and/or
   triangles, randomly selected with randomly-generated features
   to System.out.
   The user can specify this number by the first command line
   argument - the default number is 5 if there is no argument.
   The user can also specify a random integer seed as the second
   command line argument.
*/
public class FigureDisplayer {

    private static final int DEFAULT_NUMBER = 5,
        MIN_CODE = 33, MAX_CODE = 126, // range of printable ascii codes
        MAX_OFFSET = 50, MAX_WIDTH = 20, MAX_HEIGHT = 10;

    public static void main(String args[]) {

        // set number of figures by command line argument if there is one
        int n = DEFAULT_NUMBER;
        if (args.length > 0) // might throw a NumberFormatException here
            n = Integer.parseInt(args[0]);

        // create random generator, using seed by second argument if it exists
        Random generator;
        if (args.length < 2)
            generator = new Random();
        else {
            long seed = Long.parseLong(args[1]);
                // above line also might throw NumberFormatException
            generator = new Random(seed);
        }
        
        // create list of n figure printer objects with random properties
        ArrayList<FigurePrinter> list = new ArrayList<FigurePrinter>();
        for (int i=0; i<n; i++) {
            boolean rectangle = generator.nextBoolean();
            char c = (char)(MIN_CODE + generator.nextInt(MAX_CODE - MIN_CODE + 1));
            int off = generator.nextInt(MAX_OFFSET + 1);
            int width = generator.nextInt(MAX_WIDTH + 1);
            if (rectangle) {
                int height = generator.nextInt(MAX_HEIGHT + 1);
                list.add( new RectanglePrinter(c, off, width, height) );
            }
            else
                list.add( new TrianglePrinter(c, off, width) );
        }

        // sort the list by offset amount
        Collections.sort(list);

        // print the figures with one blank line separating each pair
        for (FigurePrinter f : list)
            f.printAt(1);
    }
}