// CSE 142 Lecture 18
// PrintStreams, Objects
// This program is a client of the Point object that we wrote
// in class. It reads cities from a file, and draws them on
// a DrawingPanel. It then asks the user for the epicenter and
// radius of an earthquake and turns cities in the affected area red.

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

public class PointMain {
	public static void main(String[] args) throws FileNotFoundException {
		// Get the city coordinates from the input file and
		// store them in an array of Point objects
		Scanner input = new Scanner(new File("cities.txt"));
		Point[] cities = new Point[input.nextInt()];
		for (int i = 0; i < cities.length; i++) {
			cities[i] = new Point(input.nextInt(), input.nextInt());
		}

		// Draw each city in the array on the panel
		DrawingPanel panel = new DrawingPanel(200, 200);
		Graphics g = panel.getGraphics();
		for (int i = 0; i < cities.length; i++) {
			cities[i].draw(g);
			System.out.println(cities[i]);
		}
		
		// Get the epicenter and radius from the user
		Scanner console = new Scanner(System.in);
		System.out.print("Epicenter x? ");
		int epiX = console.nextInt();
		System.out.print("Epicenter y? ");
		int epiY = console.nextInt();
		System.out.print("Affected radius? ");
		int radius = console.nextInt();
		
		// Draw a circle around affected cities, and turn those cities red
		Point epicenter = new Point(epiX, epiY);
		g.drawOval(epicenter.getX() - radius, epicenter.getY() - radius, radius * 2, radius * 2);
		g.setColor(Color.RED);
		for (int i = 0; i < cities.length; i++) {
			if (cities[i].distance(epicenter) < radius) {
				cities[i].draw(g);
				System.out.println(cities[i]);
			}
		}
	}
}