Day16.java

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

public class Day16 {

	private final static String FILENAME = ".\\InputDay16.txt";
	private final static Pattern SUE_NUMBER = Pattern.compile("Sue (\\d+):");
	private final static Pattern DATA = Pattern
			.compile("(?<item>.+): (?<count>\\d+)");

	private List<Sue> sues = new ArrayList<>();
	private Sue target;

	class Sue {
		int number;
		Map<String, Integer> properties = new HashMap<>();

		public Sue(String s) {
			int pos = s.indexOf(":"); // get the position of the first ":"
			String tmp = s.substring(0, pos + 1); // capture first part
													// including the ":"
			Matcher m = SUE_NUMBER.matcher(tmp);
			if (m.matches()) {
				number = Integer.parseInt(m.group(1));
			}
			tmp = s.substring(pos + 2); // remaining String
			String[] values = tmp.split(", "); // split on ", "
			for (String p : values) {
				m = DATA.matcher(p);
				if (m.matches()) {
					String item = m.group("item");
					int count = Integer.parseInt(m.group("count"));
					properties.put(item, count);
				}
			}
		}


		public double percentMatchRange(Sue other, boolean part1) {
			double score = 0d;
			double step = (100.0 / other.properties.size()); // percental
																// increment per
																// matched
																// property
			for (Map.Entry<String, Integer> e : properties.entrySet()) {
				String s = e.getKey();
				int v = e.getValue();
				if (part1) {
					if (other.properties.get(s) == v) {
						score += step;
					}
				} else {
					if ("cats trees".contains(s)) {
						if (other.properties.get(s) < v) {
							score += step;
						}
					} else {
						if ("pomeranians goldfish".contains(s)) {
							if (other.properties.get(s) > v) {
								score += step;
							}
						} else {
							if (other.properties.get(s) == v) {
								score += step;
							}
						}
					}
				}
			}
			return score;
		}
	}

	public Day16() {
		List<String> data = FileIO.getFileAsList(FILENAME);

		for (String s : data) {
			Sue sue = new Sue(s);
			sues.add(sue);
		}

		String tmp = "Sue 0: children: 3, cats: 7, samoyeds: 2, pomeranians: 3, akitas: 0, vizslas: 0, goldfish: 5, trees: 3, cars: 2, perfumes: 1";
		target = new Sue(tmp);
	}

	public static void main(String[] args) {
		Day16 day16 = new Day16();

		day16.solvePart1();
		day16.solvePart2();
	}

	public void solvePart1() {
		int sueNumber = solve(true);
		System.out
				.println("Part 1: The Sue with the highest matching score is number: "
						+ sueNumber);
	}

	public void solvePart2() {
		int sueNumber = solve(false);
		System.out
				.println("Part 2: The Sue with the highest matching score is number: "
						+ sueNumber);
	}

	public int solve(boolean part1) {
		double maxScore = Double.MIN_VALUE;
		int sueNumber = Integer.MIN_VALUE;
		for (Sue sue : sues) {
			double match = sue.percentMatchRange(target, part1);
			if (maxScore < match) {
				maxScore = match;
				sueNumber = sue.number;
			}
		}
		return sueNumber;
		
	}
	
}