package com.earth2me.essentials;

import com.earth2me.essentials.craftbukkit.BanLookup;
import com.earth2me.essentials.craftbukkit.FakeWorld;
import com.earth2me.essentials.settings.Spawns;
import com.earth2me.essentials.storage.YamlStorageWriter;
import com.earth2me.essentials.utils.StringUtil;
import com.google.common.base.Charsets;
import com.google.common.collect.Maps;
import net.ess3.api.IEssentials;
import org.bukkit.BanList;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.configuration.ConfigurationSection;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.security.DigestInputStream;
import java.security.MessageDigest;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static com.earth2me.essentials.I18n.tl;

public class EssentialsUpgrade {
    private final static Logger LOGGER = Logger.getLogger("Essentials");
    private static final FileFilter YML_FILTER = pathname -> pathname.isFile() && pathname.getName().endsWith(".yml");
    private static final String PATTERN_CONFIG_UUID_REGEX = "(?mi)^uuid:\\s*([0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12})\\s*$";
    private static final Pattern PATTERN_CONFIG_UUID = Pattern.compile(PATTERN_CONFIG_UUID_REGEX);
    private static final String PATTERN_CONFIG_NAME_REGEX = "(?mi)^lastAccountName:\\s*[\"\']?(\\w+)[\"\']?\\s*$";
    private static final Pattern PATTERN_CONFIG_NAME = Pattern.compile(PATTERN_CONFIG_NAME_REGEX);
    private final transient IEssentials ess;
    private final transient EssentialsConf doneFile;

    EssentialsUpgrade(final IEssentials essentials) {
        ess = essentials;
        if (!ess.getDataFolder().exists()) {
            ess.getDataFolder().mkdirs();
        }
        doneFile = new EssentialsConf(new File(ess.getDataFolder(), "upgrades-done.yml"));
        doneFile.load();
    }

    public static void uuidFileConvert(final IEssentials ess, final Boolean ignoreUFCache) {
        ess.getLogger().info("Starting Essentials UUID userdata conversion");

        final File userdir = new File(ess.getDataFolder(), "userdata");
        if (!userdir.exists()) {
            return;
        }

        int countFiles = 0;
        int countFails = 0;
        int countEssCache = 0;
        int countBukkit = 0;

        ess.getLogger().info("Found " + userdir.list().length + " files to convert...");

        for (final String string : userdir.list()) {
            if (!string.endsWith(".yml") || string.length() < 5) {
                continue;
            }

            final int showProgress = countFiles % 250;

            if (showProgress == 0) {
                ess.getUserMap().getUUIDMap().forceWriteUUIDMap();
                ess.getLogger().info("Converted " + countFiles + "/" + userdir.list().length);
            }

            countFiles++;

            final String name = string.substring(0, string.length() - 4);
            final EssentialsUserConf config;
            UUID uuid = null;
            try {
                uuid = UUID.fromString(name);
            } catch (final IllegalArgumentException ex) {
                final File file = new File(userdir, string);
                final EssentialsConf conf = new EssentialsConf(file);
                conf.load();
                conf.setProperty("lastAccountName", name);
                conf.save();

                final String uuidConf = ignoreUFCache ? "force-uuid" : "uuid";

                final String uuidString = conf.getString(uuidConf, null);

                for (int i = 0; i < 4; i++) {
                    try {
                        uuid = UUID.fromString(uuidString);
                        countEssCache++;
                        break;
                    } catch (final Exception ex2) {
                        if (conf.getBoolean("npc", false)) {
                            uuid = UUID.nameUUIDFromBytes(("NPC:" + name).getBytes(Charsets.UTF_8));
                            break;
                        }

                        final org.bukkit.OfflinePlayer player = ess.getServer().getOfflinePlayer(name);
                        uuid = player.getUniqueId();
                    }

                    if (uuid != null) {
                        countBukkit++;
                        break;
                    }
                }

                if (uuid != null) {
                    conf.forceSave();
                    config = new EssentialsUserConf(name, uuid, new File(userdir, uuid + ".yml"));
                    config.convertLegacyFile();
                    ess.getUserMap().trackUUID(uuid, name, false);
                    continue;
                }
                countFails++;
            }
        }
        ess.getUserMap().getUUIDMap().forceWriteUUIDMap();

        ess.getLogger().info("Converted " + countFiles + "/" + countFiles + ".  Conversion complete.");
        ess.getLogger().info("Converted via cache: " + countEssCache + " :: Converted via lookup: " + countBukkit + " :: Failed to convert: " + countFails);
        ess.getLogger().info("To rerun the conversion type /essentials uuidconvert");
    }

    public void convertIgnoreList() {
        final Pattern pattern = Pattern.compile("^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$");
        if (doneFile.getBoolean("updateUsersIgnoreListUUID", false)) {
            return;
        }

        LOGGER.info("Attempting to migrate ignore list to UUIDs");

        final File userdataFolder = new File(ess.getDataFolder(), "userdata");
        if (!userdataFolder.exists() || !userdataFolder.isDirectory()) {
            return;
        }
        final File[] userFiles = userdataFolder.listFiles();

        for (final File file : userFiles) {
            if (!file.isFile() || !file.getName().endsWith(".yml")) {
                continue;
            }
            final EssentialsConf config = new EssentialsConf(file);
            try {
                config.load();
                if (config.hasProperty("ignore")) {
                    final List<String> migratedIgnores = new ArrayList<>();
                    for (final String name : Collections.synchronizedList(config.getStringList("ignore"))) {
                        if (name == null) {
                            continue;
                        }
                        if (pattern.matcher(name.trim()).matches()) {
                            LOGGER.info("Detected already migrated ignore list!");
                            return;
                        }
                        final User user = ess.getOfflineUser(name);
                        if (user != null && user.getBase() != null) {
                            migratedIgnores.add(user.getBase().getUniqueId().toString());
                        }
                    }
                    config.removeProperty("ignore");
                    config.setProperty("ignore", migratedIgnores);
                    config.forceSave();
                }
            } catch (final RuntimeException ex) {
                LOGGER.log(Level.INFO, "File: " + file.toString());
                throw ex;
            }
        }
        doneFile.setProperty("updateUsersIgnoreListUUID", true);
        doneFile.save();
        LOGGER.info("Done converting ignore list.");
    }

    public void convertKits() {
        final Kits kits = ess.getKits();
        final EssentialsConf config = kits.getConfig();
        if (doneFile.getBoolean("kitsyml", false)) {
            return;
        }

        LOGGER.info("Attempting to convert old kits in config.yml to new kits.yml");

        final ConfigurationSection section = ess.getSettings().getKitSection();
        if (section == null) {
            LOGGER.info("No kits found to migrate.");
            return;
        }

        final Map<String, Object> legacyKits = ess.getSettings().getKitSection().getValues(true);

        for (final Map.Entry<String, Object> entry : legacyKits.entrySet()) {
            LOGGER.info("Converting " + entry.getKey());
            config.set("kits." + entry.getKey(), entry.getValue());
        }

        config.save();
        doneFile.setProperty("kitsyml", true);
        doneFile.save();
        LOGGER.info("Done converting kits.");
    }

    private void moveMotdRulesToFile(final String name) {
        if (doneFile.getBoolean("move" + name + "ToFile", false)) {
            return;
        }
        try {
            final File file = new File(ess.getDataFolder(), name + ".txt");
            if (file.exists()) {
                return;
            }
            final File configFile = new File(ess.getDataFolder(), "config.yml");
            if (!configFile.exists()) {
                return;
            }
            final EssentialsConf conf = new EssentialsConf(configFile);
            conf.load();
            final List<String> lines = conf.getStringList(name);
            if (lines != null && !lines.isEmpty()) {
                if (!file.createNewFile()) {
                    throw new IOException("Failed to create file " + file);
                }
                final PrintWriter writer = new PrintWriter(file);

                for (final String line : lines) {
                    writer.println(line);
                }
                writer.close();
            }
            doneFile.setProperty("move" + name + "ToFile", true);
            doneFile.save();
        } catch (final IOException e) {
            LOGGER.log(Level.SEVERE, tl("upgradingFilesError"), e);
        }
    }

    private void removeLinesFromConfig(final File file, final String regex, final String info) throws Exception {
        boolean needUpdate = false;
        final BufferedReader bReader = new BufferedReader(new FileReader(file));
        final File tempFile = File.createTempFile("essentialsupgrade", ".tmp.yml", ess.getDataFolder());
        final BufferedWriter bWriter = new BufferedWriter(new FileWriter(tempFile));
        do {
            final String line = bReader.readLine();
            if (line == null) {
                break;
            }
            if (line.matches(regex)) {
                if (!needUpdate && info != null) {
                    bWriter.write(info, 0, info.length());
                    bWriter.newLine();
                }
                needUpdate = true;
            } else {
                if (line.endsWith("\r\n")) {
                    bWriter.write(line, 0, line.length() - 2);
                } else if (line.endsWith("\r") || line.endsWith("\n")) {
                    bWriter.write(line, 0, line.length() - 1);
                } else {
                    bWriter.write(line, 0, line.length());
                }
                bWriter.newLine();
            }
        } while (true);
        bReader.close();
        bWriter.close();
        if (needUpdate) {
            if (!file.renameTo(new File(file.getParentFile(), file.getName().concat("." + System.currentTimeMillis() + ".upgradebackup")))) {
                throw new Exception(tl("configFileMoveError"));
            }
            if (!tempFile.renameTo(file)) {
                throw new Exception(tl("configFileRenameError"));
            }
        } else {
            tempFile.delete();
        }
    }

    private void updateUsersPowerToolsFormat() {
        if (doneFile.getBoolean("updateUsersPowerToolsFormat", false)) {
            return;
        }
        final File userdataFolder = new File(ess.getDataFolder(), "userdata");
        if (!userdataFolder.exists() || !userdataFolder.isDirectory()) {
            return;
        }
        final File[] userFiles = userdataFolder.listFiles();

        for (final File file : userFiles) {
            if (!file.isFile() || !file.getName().endsWith(".yml")) {
                continue;
            }
            final EssentialsConf config = new EssentialsConf(file);
            try {
                config.load();
                if (config.hasProperty("powertools")) {
                    final Map<String, Object> powertools = config.getConfigurationSection("powertools").getValues(false);
                    if (powertools == null) {
                        continue;
                    }
                    for (final Map.Entry<String, Object> entry : powertools.entrySet()) {
                        if (entry.getValue() instanceof String) {
                            final List<String> temp = new ArrayList<>();
                            temp.add((String) entry.getValue());
                            powertools.put(entry.getKey(), temp);
                        }
                    }
                    config.forceSave();
                }
            } catch (final RuntimeException ex) {
                LOGGER.log(Level.INFO, "File: " + file.toString());
                throw ex;
            }
        }
        doneFile.setProperty("updateUsersPowerToolsFormat", true);
        doneFile.save();
    }

    private void updateUsersHomesFormat() {
        if (doneFile.getBoolean("updateUsersHomesFormat", false)) {
            return;
        }
        final File userdataFolder = new File(ess.getDataFolder(), "userdata");
        if (!userdataFolder.exists() || !userdataFolder.isDirectory()) {
            return;
        }
        final File[] userFiles = userdataFolder.listFiles();

        for (final File file : userFiles) {
            if (!file.isFile() || !file.getName().endsWith(".yml")) {
                continue;
            }
            final EssentialsConf config = new EssentialsConf(file);
            try {

                config.load();
                if (config.hasProperty("home") && config.hasProperty("home.default")) {
                    final String defworld = (String) config.getProperty("home.default");
                    final Location defloc = getFakeLocation(config, "home.worlds." + defworld);
                    if (defloc != null) {
                        config.setProperty("homes.home", defloc);
                    }

                    final Set<String> worlds = config.getConfigurationSection("home.worlds").getKeys(false);
                    Location loc;
                    String worldName;

                    if (worlds == null) {
                        continue;
                    }
                    for (final String world : worlds) {
                        if (defworld.equalsIgnoreCase(world)) {
                            continue;
                        }
                        loc = getFakeLocation(config, "home.worlds." + world);
                        if (loc == null) {
                            continue;
                        }
                        worldName = loc.getWorld().getName().toLowerCase(Locale.ENGLISH);
                        if (worldName != null && !worldName.isEmpty()) {
                            config.setProperty("homes." + worldName, loc);
                        }
                    }
                    config.removeProperty("home");
                    config.forceSave();
                }

            } catch (final RuntimeException ex) {
                LOGGER.log(Level.INFO, "File: " + file.toString());
                throw ex;
            }
        }
        doneFile.setProperty("updateUsersHomesFormat", true);
        doneFile.save();
    }

    private void sanitizeAllUserFilenames() {
        if (doneFile.getBoolean("sanitizeAllUserFilenames", false)) {
            return;
        }
        final File usersFolder = new File(ess.getDataFolder(), "userdata");
        if (!usersFolder.exists()) {
            return;
        }
        final File[] listOfFiles = usersFolder.listFiles();
        for (final File listOfFile : listOfFiles) {
            final String filename = listOfFile.getName();
            if (!listOfFile.isFile() || !filename.endsWith(".yml")) {
                continue;
            }
            final String sanitizedFilename = StringUtil.sanitizeFileName(filename.substring(0, filename.length() - 4)) + ".yml";
            if (sanitizedFilename.equals(filename)) {
                continue;
            }
            final File tmpFile = new File(listOfFile.getParentFile(), sanitizedFilename + ".tmp");
            final File newFile = new File(listOfFile.getParentFile(), sanitizedFilename);
            if (!listOfFile.renameTo(tmpFile)) {
                LOGGER.log(Level.WARNING, tl("userdataMoveError", filename, sanitizedFilename));
                continue;
            }
            if (newFile.exists()) {
                LOGGER.log(Level.WARNING, tl("duplicatedUserdata", filename, sanitizedFilename));
                continue;
            }
            if (!tmpFile.renameTo(newFile)) {
                LOGGER.log(Level.WARNING, tl("userdataMoveBackError", sanitizedFilename, sanitizedFilename));
            }
        }
        doneFile.setProperty("sanitizeAllUserFilenames", true);
        doneFile.save();
    }

    private World getFakeWorld(final String name) {
        final File bukkitDirectory = ess.getDataFolder().getParentFile().getParentFile();
        final File worldDirectory = new File(bukkitDirectory, name);
        if (worldDirectory.exists() && worldDirectory.isDirectory()) {
            return new FakeWorld(worldDirectory.getName(), World.Environment.NORMAL);
        }
        return null;
    }

    public Location getFakeLocation(final EssentialsConf config, final String path) {
        final String worldName = config.getString((path != null ? path + "." : "") + "world");
        if (worldName == null || worldName.isEmpty()) {
            return null;
        }
        final World world = getFakeWorld(worldName);
        if (world == null) {
            return null;
        }
        return new Location(world, config.getDouble((path != null ? path + "." : "") + "x", 0), config.getDouble((path != null ? path + "." : "") + "y", 0), config.getDouble((path != null ? path + "." : "") + "z", 0), (float) config.getDouble((path != null ? path + "." : "") + "yaw", 0), (float) config.getDouble((path != null ? path + "." : "") + "pitch", 0));
    }

    private void deleteOldItemsCsv() {
        if (doneFile.getBoolean("deleteOldItemsCsv", false)) {
            return;
        }
        final File file = new File(ess.getDataFolder(), "items.csv");
        if (file.exists()) {
            try {
                final Set<BigInteger> oldconfigs = new HashSet<>();
                oldconfigs.add(new BigInteger("66ec40b09ac167079f558d1099e39f10", 16)); // sep 1
                oldconfigs.add(new BigInteger("34284de1ead43b0bee2aae85e75c041d", 16)); // crlf
                oldconfigs.add(new BigInteger("c33bc9b8ee003861611bbc2f48eb6f4f", 16)); // jul 24
                oldconfigs.add(new BigInteger("6ff17925430735129fc2a02f830c1daa", 16)); // crlf

                final MessageDigest digest = ManagedFile.getDigest();
                final BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
                final byte[] buffer = new byte[1024];
                try (final DigestInputStream dis = new DigestInputStream(bis, digest)) {
                    while (dis.read(buffer) != -1) {
                    }
                }

                final BigInteger hash = new BigInteger(1, digest.digest());
                if (oldconfigs.contains(hash) && !file.delete()) {
                    throw new IOException("Could not delete file " + file.toString());
                }
                doneFile.setProperty("deleteOldItemsCsv", true);
                doneFile.save();
            } catch (final IOException ex) {
                Bukkit.getLogger().log(Level.SEVERE, ex.getMessage(), ex);
            }
        }
    }

    private void updateSpawnsToNewSpawnsConfig() {
        if (doneFile.getBoolean("updateSpawnsToNewSpawnsConfig", false)) {
            return;
        }
        final File configFile = new File(ess.getDataFolder(), "spawn.yml");
        if (configFile.exists()) {

            final EssentialsConf config = new EssentialsConf(configFile);
            try {
                config.load();
                if (!config.hasProperty("spawns")) {
                    final Spawns spawns = new Spawns();
                    final Set<String> keys = config.getKeys(false);
                    for (final String group : keys) {
                        final Location loc = getFakeLocation(config, group);
                        spawns.getSpawns().put(group.toLowerCase(Locale.ENGLISH), loc);
                    }
                    if (!configFile.renameTo(new File(ess.getDataFolder(), "spawn.yml.old"))) {
                        throw new Exception(tl("fileRenameError", "spawn.yml"));
                    }
                    try (final PrintWriter writer = new PrintWriter(configFile)) {
                        new YamlStorageWriter(writer).save(spawns);
                    }
                }
            } catch (final Exception ex) {
                Bukkit.getLogger().log(Level.SEVERE, ex.getMessage(), ex);
            }
        }
        doneFile.setProperty("updateSpawnsToNewSpawnsConfig", true);
        doneFile.save();
    }

    private void updateJailsToNewJailsConfig() {
        if (doneFile.getBoolean("updateJailsToNewJailsConfig", false)) {
            return;
        }
        final File configFile = new File(ess.getDataFolder(), "jail.yml");
        if (configFile.exists()) {

            final EssentialsConf config = new EssentialsConf(configFile);
            try {
                config.load();
                if (!config.hasProperty("jails")) {
                    final com.earth2me.essentials.settings.Jails jails = new com.earth2me.essentials.settings.Jails();
                    final Set<String> keys = config.getKeys(false);
                    for (final String jailName : keys) {
                        final Location loc = getFakeLocation(config, jailName);
                        jails.getJails().put(jailName.toLowerCase(Locale.ENGLISH), loc);
                    }
                    if (!configFile.renameTo(new File(ess.getDataFolder(), "jail.yml.old"))) {
                        throw new Exception(tl("fileRenameError", "jail.yml"));
                    }
                    try (final PrintWriter writer = new PrintWriter(configFile)) {
                        new YamlStorageWriter(writer).save(jails);
                    }
                }
            } catch (final Exception ex) {
                Bukkit.getLogger().log(Level.SEVERE, ex.getMessage(), ex);
            }
        }
        doneFile.setProperty("updateJailsToNewJailsConfig", true);
        doneFile.save();
    }

    private void warnMetrics() {
        if (doneFile.getBoolean("warnMetrics", false)) {
            return;
        }
        doneFile.setProperty("warnMetrics", true);
        doneFile.save();
    }

    private void uuidFileChange() {
        if (doneFile.getBoolean("uuidFileChange", false)) {
            return;
        }

        final Boolean ignoreUFCache = doneFile.getBoolean("ignore-userfiles-cache", false);

        final File userdir = new File(ess.getDataFolder(), "userdata");
        if (!userdir.exists()) {
            return;
        }

        int countFiles = 0;
        int countReqFiles = 0;
        for (final String string : userdir.list()) {
            if (!string.endsWith(".yml") || string.length() < 5) {
                continue;
            }

            countFiles++;

            final String name = string.substring(0, string.length() - 4);
            UUID uuid = null;

            try {
                uuid = UUID.fromString(name);
            } catch (final IllegalArgumentException ex) {
                countReqFiles++;
            }

            if (countFiles > 100) {
                break;
            }
        }

        if (countReqFiles < 1) {
            return;
        }

        ess.getLogger().info("#### Starting Essentials UUID userdata conversion in a few seconds. ####");
        ess.getLogger().info("We recommend you take a backup of your server before upgrading from the old username system.");

        try {
            Thread.sleep(15000);
        } catch (final InterruptedException ex) {
            // NOOP
        }

        uuidFileConvert(ess, ignoreUFCache);

        doneFile.setProperty("uuidFileChange", true);
        doneFile.save();
    }

    public void banFormatChange() {
        if (doneFile.getBoolean("banFormatChange", false)) {
            return;
        }

        ess.getLogger().info("Starting Essentials ban format conversion");

        final File userdir = new File(ess.getDataFolder(), "userdata");
        if (!userdir.exists()) {
            return;
        }

        int countFiles = 0;

        ess.getLogger().info("Found " + userdir.list().length + " files to convert...");

        for (final String string : userdir.list()) {
            if (!string.endsWith(".yml") || string.length() < 5) {
                continue;
            }

            final int showProgress = countFiles % 250;

            if (showProgress == 0) {
                ess.getLogger().info("Converted " + countFiles + "/" + userdir.list().length);
            }

            countFiles++;
            final File pFile = new File(userdir, string);
            final EssentialsConf conf = new EssentialsConf(pFile);
            conf.load();

            String banReason;
            long banTimeout;

            try {
                banReason = conf.getConfigurationSection("ban").getString("reason");
            } catch (final NullPointerException n) {
                banReason = null;
            }

            final String playerName = conf.getString("lastAccountName");
            if (playerName != null && playerName.length() > 1 && banReason != null && banReason.length() > 1) {
                try {
                    if (conf.getConfigurationSection("ban").contains("timeout")) {
                        banTimeout = Long.parseLong(conf.getConfigurationSection("ban").getString("timeout"));
                    } else {
                        banTimeout = 0L;
                    }
                } catch (final NumberFormatException n) {
                    banTimeout = 0L;
                }

                if (BanLookup.isBanned(ess, playerName)) {
                    updateBan(playerName, banReason, banTimeout);
                }
            }
            conf.removeProperty("ban");
            conf.save();
        }

        doneFile.setProperty("banFormatChange", true);
        doneFile.save();
        ess.getLogger().info("Ban format update complete.");
    }

    private void updateBan(final String playerName, final String banReason, final Long banTimeout) {
        if (banTimeout == 0) {
            Bukkit.getBanList(BanList.Type.NAME).addBan(playerName, banReason, null, Console.NAME);
        } else {
            Bukkit.getBanList(BanList.Type.NAME).addBan(playerName, banReason, new Date(banTimeout), Console.NAME);
        }
    }

    private void repairUserMap() {
        if (doneFile.getBoolean("userMapRepaired", false)) {
            return;
        }
        ess.getLogger().info("Starting usermap repair");

        final File userdataFolder = new File(ess.getDataFolder(), "userdata");
        if (!userdataFolder.isDirectory()) {
            ess.getLogger().warning("Missing userdata folder, aborting");
            return;
        }
        final File[] files = userdataFolder.listFiles(YML_FILTER);

        final DecimalFormat format = new DecimalFormat("#0.00");
        final Map<String, UUID> names = Maps.newHashMap();

        for (int index = 0; index < files.length; index++) {
            final File file = files[index];
            try {
                UUID uuid = null;
                final String filename = file.getName();
                final String configData = new String(java.nio.file.Files.readAllBytes(file.toPath()), Charsets.UTF_8);

                if (filename.length() > 36) {
                    try {
                        // ".yml" ending has 4 chars...
                        uuid = UUID.fromString(filename.substring(0, filename.length() - 4));
                    } catch (final IllegalArgumentException ignored) {
                    }
                }

                final Matcher uuidMatcher = PATTERN_CONFIG_UUID.matcher(configData);
                if (uuidMatcher.find()) {
                    try {
                        uuid = UUID.fromString(uuidMatcher.group(1));
                    } catch (final IllegalArgumentException ignored) {
                    }
                }

                if (uuid == null) {
                    // Don't import
                    continue;
                }

                final Matcher nameMatcher = PATTERN_CONFIG_NAME.matcher(configData);
                if (nameMatcher.find()) {
                    final String username = nameMatcher.group(1);
                    if (username != null && username.length() > 0) {
                        names.put(StringUtil.safeString(username), uuid);
                    }
                }

                if (index % 1000 == 0) {
                    ess.getLogger().info("Reading: " + format.format((100d * (double) index) / files.length)
                        + "%");
                }
            } catch (final IOException e) {
                ess.getLogger().log(Level.SEVERE, "Error while reading file: ", e);
                return;
            }
        }

        ess.getUserMap().getNames().putAll(names);
        ess.getUserMap().reloadConfig();

        doneFile.setProperty("userMapRepaired", true);
        doneFile.save();
        ess.getLogger().info("Completed usermap repair.");
    }

    public void beforeSettings() {
        if (!ess.getDataFolder().exists()) {
            ess.getDataFolder().mkdirs();
        }
        moveMotdRulesToFile("motd");
        moveMotdRulesToFile("rules");
    }

    public void afterSettings() {
        sanitizeAllUserFilenames();
        updateUsersPowerToolsFormat();
        updateUsersHomesFormat();
        deleteOldItemsCsv();
        updateSpawnsToNewSpawnsConfig();
        updateJailsToNewJailsConfig();
        uuidFileChange();
        banFormatChange();
        warnMetrics();
        repairUserMap();
        convertIgnoreList();
    }
}