import java.io.*;
import java.util.HashMap;
import java.util.Set;

public class MapsCollection {
    private final HashMap<String, MapWithSetTracktorGeneric<IDrawningObject, AbstractMap>> _mapsStorage;

    private final int _pictureWidth;
    private final int _pictureHeight;

    private final char separatorDict = '|';
    private final char separatorData = ';';

    public Set<String> getKeys() {
        return _mapsStorage.keySet();
    }

    public MapsCollection(int pictureWidth, int pictureHeight) {
        _mapsStorage = new HashMap<>();
        _pictureWidth = pictureWidth;
        _pictureHeight = pictureHeight;
    }

    public void addMap(String name, AbstractMap map) {
        if (!_mapsStorage.containsKey(name)) {
            _mapsStorage.put(name, new MapWithSetTracktorGeneric<>(_pictureWidth, _pictureHeight, map));
        }
    }

    public void deleteMap(String name) {
        _mapsStorage.remove(name);
    }

    public MapWithSetTracktorGeneric<IDrawningObject, AbstractMap> getMap(String name) {
        return _mapsStorage.getOrDefault(name, null);
    }

    @SuppressWarnings("ResultOfMethodCallIgnored")
    public boolean saveData(String filename) throws IOException {
        File file = new File(filename);

        if (file.exists()) {
            file.delete();
        }

        file.createNewFile();

        try (PrintWriter writer = new PrintWriter(file)) {
            writer.println("MapsCollection");

            for (var storage : _mapsStorage.entrySet()) {
                writer.println(String.format("%s%c%s", storage.getKey(), separatorDict, storage.getValue().getData(separatorDict, separatorData)));
            }
        }

        return true;
    }

    public boolean loadData(String filename) throws IOException {
        File file = new File(filename);

        if (!file.exists()) {
            return false;
        }

        try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
            String currentLine = reader.readLine();

            if (currentLine == null || !currentLine.contains("MapsCollection")) {
                return false;
            }

            _mapsStorage.clear();
            while ((currentLine = reader.readLine()) != null) {
                var elements = currentLine.split(String.format("\\%c", separatorDict));

                AbstractMap map = switch (elements[1]) {
                    case "SimpleMap" -> new SimpleMap();
                    case "DumpMap" -> new DumpMap();
                    default -> null;
                };

                _mapsStorage.put(elements[0], new MapWithSetTracktorGeneric<>(_pictureWidth, _pictureHeight, map));
                _mapsStorage.get(elements[0]).loadData(elements[2].split(separatorData + "\n?"));
            }
        }

        return true;
    }

    @SuppressWarnings("ResultOfMethodCallIgnored")
    public boolean saveMap(String mapName, String filename) throws IOException {
        File file = new File(filename);

        if (file.exists()) {
            file.delete();
        }

        file.createNewFile();

        MapWithSetTracktorGeneric<IDrawningObject, AbstractMap> map = _mapsStorage.getOrDefault(mapName, null);

        if (map == null) {
            return false;
        }

        try (PrintWriter writer = new PrintWriter(file)) {
            writer.println("Map");
            writer.println(mapName);
            writer.println(map.getMap().getClass().getSimpleName());

            for (var tracktor : map._setTracktor.getTracktors()) {
                writer.println(tracktor.getInfo());
            }
        }

        return true;
    }

    public boolean loadMap(String filename) throws IOException {
        File file = new File(filename);

        if (!file.exists()) {
            return false;
        }

        try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
            String currentLine = reader.readLine();

            if (currentLine == null || !currentLine.contains("Map")) {
                return false;
            }

            String mapName = reader.readLine();

            MapWithSetTracktorGeneric<IDrawningObject, AbstractMap> map;
            if (_mapsStorage.containsKey(mapName)) {
                map = _mapsStorage.get(mapName);
                if (!map.getMap().getClass().getSimpleName().equals(reader.readLine())) {
                    return false;
                }
                map._setTracktor.clear();
            } else {
                map = switch (reader.readLine()) {
                    case "SimpleMap" -> new MapWithSetTracktorGeneric<>(_pictureWidth, _pictureHeight, new SimpleMap());
                    case "DumpMap" -> new MapWithSetTracktorGeneric<>(_pictureWidth, _pictureHeight, new DumpMap());
                    default -> null;
                };
            }

            while ((currentLine = reader.readLine()) != null) {
                map._setTracktor.insert(DrawningObjectExcavator.create(currentLine));
            }

            _mapsStorage.put(mapName, map);
        }

        return true;
    }
}