package quiz;

import static org.junit.Assert.assertNotNull;

import java.util.Scanner;

import org.junit.Test;

public class MovingMoney {

	private int memberSize;

	private Scanner scanner = new Scanner(System.in);

	private double spanMoneies[];

	private double average = 0.0;

	private String result = "";

	@Test
	public void createMovingMoney() {
		MovingMoney mm = new MovingMoney();
		assertNotNull(mm);
	}

	@Test
	public void startQuiz() {
		System.out.println("3¹ø ÄûÁ ½ÃÀÛÇսôÙ");
		System.out.println("Àοø¼ö¸¦  ±×¸¸ ÇÏ°í ½ÍÀ» ¶© '0'À» ÀÔ·ÂÇϼ¼¿ä");

		while (true) {
			getMemberSize();
			if (memberSize == 0) {
				print();
				break;
			}
			getSpandMoney();
			getAverageMoney();
			getMovingMoney();
		}
	}

	private void getMovingMoney() {
		double tempMovingMoney = 0.0;
		for (int i = 0; i < spanMoneies.length; i++) {
			System.out.println("value : "
					+ Math.abs(spanMoneies[i] - average));
			tempMovingMoney += make2Format(Math.abs(spanMoneies[i] - average));
			System.out.println("tempMovingMoney : " + tempMovingMoney);
		}
		result += "$" + make2Format(tempMovingMoney / 2.0) + "\n";
	}

	private double make2Format(double amount) {
		return (double) ((int) (amount * 100)) / 100;
	}

	private void getAverageMoney() {
		double sum = 0.0;
		for (int i = 0; i < spanMoneies.length; i++) {
			sum += spanMoneies[i];
		}
		double numberOfStudents = memberSize;
		average = sum / numberOfStudents;
		System.out.println(average);
		average = makeFormat(average);
		System.out.println(makeFormat(average));
	}

	private double makeFormat(double average) {
		long tempAverage = (long) (average * 10000);
		if ((tempAverage % 10) == 9) {
			tempAverage += 1;
		}
		return (double) tempAverage / 10000;
	}

	private void getSpandMoney() {
		spanMoneies = new double[memberSize];
		for (int i = 0; i < memberSize; i++) {
			spanMoneies[i] = scanner.nextDouble();
		}
	}

	private void print() {
		System.out.println(result);
	}

	private void getMemberSize() {
		memberSize = scanner.nextInt();
	}
}