Advent of Code Day14 Version 2

Day14v2.java

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Day14v2 {

	private static final String FILENAME = "D:\\Dokumente\\Java Workspace\\AdventOfCodeDay14\\InputDay14.txt";

	private static final Pattern PATTERN = Pattern
			.compile("(.+) can fly (\\d+) km/s for (\\d+) seconds, but then must rest for (\\d+) seconds.");
	private static final int TARGET_TIME = 2503; // 2503 Seconds

	enum State {
		FLY, REST
	};

	List<Reindeer> racers = new ArrayList<>();

	class Reindeer {
		String name;
		int speed;
		int flyTime;
		int restTime;
		int distance;
		int points;
		State state;
		int currentFlyTime;
		int currentRestTime;

		public Reindeer(String name, int speed, int flyTime, int restTime) {
			this.name = name;
			this.speed = speed;
			this.flyTime = flyTime;
			this.restTime = restTime;
			distance = 0;
			points = 0;
			currentFlyTime = 0;
			currentRestTime = 0;
			fly(); // Every Reindeer starts flying
		}

		void fly() { // start flying
			state = State.FLY;
			currentFlyTime = 0;
		}

		void rest() { // start resting
			state = State.REST;
			currentRestTime = 0;
		}

		void tick() { // process one tick race time
			if (state == State.FLY) { // Reindeer is flying
				distance += speed;
				if (currentFlyTime == flyTime - 1) {
					rest();
				}
				currentFlyTime++;
			} else { // Reindeer is resting
				if (currentRestTime == restTime - 1) {
					fly();
				}
				currentRestTime++;
			}
		}

	}

	public Day14v2() {
		// initialize data
		List<String> data = FileIO.getFileAsList(FILENAME);

		for (String s : data) {
			Matcher m = PATTERN.matcher(s);
			if (m.matches()) {
				Reindeer r = new Reindeer(m.group(1), Integer.parseInt(m
						.group(2)), Integer.parseInt(m.group(3)),
						Integer.parseInt(m.group(4)));
				add(r);
			}
		}
	}

	void race() { // run the race

		for (int second = 0; second < TARGET_TIME; second++) {
			tick();
		}

	}

	void tick() { // one race round
		racers.forEach(Reindeer::tick);
		checkCurrentLead();
	}

	void checkCurrentLead() { // find the current leader of the race
		int max = winner();
		racers.stream().filter(r -> r.distance == max).forEach(r -> r.points++);
	}

	int winner() { // get the max distance at the current state of the race
		return racers.stream().mapToInt(r -> r.distance).max().getAsInt();
	}

	void add(Reindeer r) {
		racers.add(r); // add the racers
	}

	int pointsWinner() { // get the max points at the current state of the race
		return racers.stream().mapToInt(p -> p.points).max().getAsInt();
	}

	public static void main(String[] args) {

		Day14v2 day14 = new Day14v2();

		day14.race(); // run the Reindeer race

		System.out.println("Part 1: Max Distance = " + day14.winner());

		System.out.println("Part 2: Max Points = " + day14.pointsWinner());

	}

}