04. Anonymous Cache

import java.util.*;

public class AnonymousCache {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String input = scanner.nextLine();

        Map<String, List<String>> sets = new LinkedHashMap<>();
        Map<String, Long> sizes = new HashMap<>();
        Map<String, List<String>> cacheSets = new LinkedHashMap<>();
        Map<String, Long> cashSizes = new HashMap<>();

        while (!input.equals("thetinggoesskrra")) {
            if (!input.contains("-")) {
                String dataSet = input;
                if (!sets.containsKey(dataSet)) {
                    if (!cacheSets.containsKey(dataSet)) {
                        sets.put(dataSet, new ArrayList<>());
                        sizes.put(dataSet, 0L);
                    } else {
                        sets.put(dataSet, cacheSets.get(dataSet));
                        sizes.put(dataSet, cashSizes.get(dataSet));
                        cacheSets.remove(dataSet);
                        cashSizes.remove(dataSet);
                    }
                }
            } else {
                String[] tokens = input.split(" -> ");
                String dataKey = tokens[0];
                String[] tokens2 = tokens[1].split(" \\| ");
                long dataSize = Long.parseLong(tokens2[0]);
                String dataSet = tokens2[1];
                if (!sets.containsKey(dataSet)) {
                    if (!cacheSets.containsKey(dataSet)) {
                        cacheSets.put(dataSet, new ArrayList<>());
                        cacheSets.get(dataSet).add(dataKey);
                        cashSizes.put(dataSet, dataSize);
                    } else {
                        cacheSets.get(dataSet).add(dataKey);
                        cacheSets.put(dataSet, cacheSets.get(dataSet));
                        cashSizes.put(dataSet, cashSizes.get(dataSet) + dataSize);
                    }
                } else {
                    sets.get(dataSet).add(dataKey);
                    sets.put(dataSet, sets.get(dataSet));
                    sizes.put(dataSet, sizes.get(dataSet) + dataSize);
                }
            }

            input = scanner.nextLine();
        }

        if (!sets.isEmpty()) {
            sizes.entrySet()
                    .stream()
                    .sorted((f, s) -> {
                        long result = s.getValue() - f.getValue();
                        return (int) result;
                    })
                    .limit(1)
                    .forEach(e -> {
                        System.out.printf("Data Set: %s, Total Size: %d%n",
                                e.getKey(), e.getValue());
                        for (String dataKey : sets.get(e.getKey())) {
                            System.out.printf("$.%s%n", dataKey);
                        }
                    });
        }

    }
}