Day3

import java.awt.*;
import java.io.File;
import java.io.FileNotFoundException;
import java.net.URL;
import java.util.HashMap;
import java.util.Scanner;

public class Day3 {
    static HashMap<Point, Integer> wires = new HashMap<>();

    public static void main(String[] args) throws FileNotFoundException {
        URL url = Day3.class.getResource("input");
        File file = new File(url.getPath());
        Scanner scanner = new Scanner(file);
        String[] wire1 = scanner.nextLine().split(",");
        String[] wire2 = scanner.nextLine().split(",");

        parseWire(wire1);
        parseWire(wire2);

        int distance = Integer.MAX_VALUE;
        for (Point crossing:
             wires.keySet()) {
            if (wires.get(crossing.getLocation()) > 1) {
                int calc = Math.abs(crossing.x) + Math.abs(crossing.y);
                if (calc < distance) {
                    distance = calc;
                }
            }
        }

        System.out.println(distance);
    }

    static void parseWire(String[] strings) {
        Point current = new Point();
        for (String command:
             strings) {
            char dir = command.charAt(0);
            int len = Integer.parseInt(command.substring(1));
            for (int i = 0; i < len; i++) {
                switch (dir) {
                    case 'U': current.y++; break;
                    case 'D': current.y--; break;
                    case 'L': current.x--; break;
                    case 'R': current.x++;
                }
                mapWirePoint(current.getLocation());
            }
        }
    }

    static void mapWirePoint(Point current) {
        if (wires.containsKey(current.getLocation())) {
            int crossing = wires.get(current.getLocation());
            crossing++;
            wires.replace(current, crossing);
        } else {
            wires.put(current.getLocation(), 1);
        }
    }
}