import java.awt.*;
import java.io.*;
import java.util.*;

// version of the earthquake program that still uses arrays, but that doubles
// the size of the array whenever needed to hold more cities

public class Earthquake3 {
    // start with a small number of MAX_CITIES to exercise the grow code
    public static final int MAX_CITIES = 2;
    public static void main(String[] args) throws FileNotFoundException {
        Scanner input = new Scanner(new File("cities.txt"));
        DrawingPanel panel = new DrawingPanel(200, 200);
        Graphics g = panel.getGraphics();
        Point[] cities = new Point[MAX_CITIES];
        int numCities = 0;
        while(input.hasNextInt()) {
            // check whether we need more room in the 'cities' array;
            // if so make one twice as big and copy the points over
            if (numCities>=cities.length) {
                Point[] newCities = new Point[2*cities.length];
                for (int i=0; i<cities.length; i++) {
                    newCities[i] = cities[i];
                }
                cities = newCities;
                // print out some debugging information
                System.out.println("cities: " + Arrays.toString(cities));
                System.out.println("new cities: " + Arrays.toString(newCities));
            }
            cities[numCities] = new Point(input.nextInt(), input.nextInt());
            cities[numCities].draw(g);
            numCities++;
        }
        Scanner console = new Scanner(System.in);
        System.out.print("Epicenter x/y? ");  // 100 80
        int x = console.nextInt();
        int y = console.nextInt();
        
        System.out.print("Radius of effect? ");  // 75
        int radius = console.nextInt();

        Circle quake = new Circle(new Point(x, y), radius);
        quake.draw(g, false);  // don't draw center dot

        g.setColor(Color.RED);
        for (int i = 0; i < numCities; i++) {
            if (quake.contains(cities[i])) {
                panel.sleep(500);
                cities[i].draw(g);
            }
        }
    }
}