package io.gitlab.jfronny.inceptum;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import io.gitlab.jfronny.inceptum.cli.*;
import io.gitlab.jfronny.inceptum.gson.GsonIgnoreExclusionStrategy;
import io.gitlab.jfronny.inceptum.gson.MinecraftArgumentDeserializer;
import io.gitlab.jfronny.inceptum.gson.OauthTokenResponseDeserializer;
import io.gitlab.jfronny.inceptum.gson.RulesDeserializer;
import io.gitlab.jfronny.inceptum.model.inceptum.InceptumVersion;
import io.gitlab.jfronny.inceptum.model.microsoft.OauthTokenResponse;
import io.gitlab.jfronny.inceptum.model.mojang.MinecraftArgument;
import io.gitlab.jfronny.inceptum.model.mojang.Rules;
import io.gitlab.jfronny.inceptum.util.Utils;
import io.gitlab.jfronny.inceptum.windows.AlertWindow;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.lang.reflect.Modifier;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Set;

//TODO mods browser
//TODO allow instance sync through metadata
//TODO update checker
public class Inceptum {
    public static final Set<Command> COMMANDS = Set.of(new HelpCommand(), new GuiCommand(), new LaunchCommand(), new JvmStateCommand());
    public static boolean IS_GUI;

    public static final Logger LOGGER = LoggerFactory.getLogger("Inceptum");
    public static final Gson GSON = new GsonBuilder()
            .registerTypeAdapter(MinecraftArgument.class, new MinecraftArgumentDeserializer())
            .registerTypeAdapter(Rules.class, new RulesDeserializer())
            .registerTypeAdapter(OauthTokenResponse.class, new OauthTokenResponseDeserializer())
            .excludeFieldsWithModifiers(Modifier.TRANSIENT)
            .excludeFieldsWithModifiers(Modifier.PRIVATE)
            .addSerializationExclusionStrategy(new GsonIgnoreExclusionStrategy())
            .setPrettyPrinting()
            .create();
    //TODO allow moving to .config or elsewhere
    public static final Path CACHE_DIR = Path.of("run/cache");
    public static final Path INSTANCE_DIR = Path.of("run/instances");
    public static final Path ASSETS_DIR = Path.of("run/assets");
    public static final Path LIBRARIES_DIR = Path.of("run/libraries");
    public static final Path NATIVES_DIR = Path.of("run/natives");
    private static final Path CONFIG_PATH = Path.of("run/glaunch2.json");
    public static final Path ACCOUNTS_PATH = Path.of("run/accounts.json");
    public static InceptumVersion VERSION;
    public static Config CONFIG;

    public static void main(String[] args) throws IOException {
        try (InputStream is = Inceptum.class.getClassLoader().getResourceAsStream("version.json");
             InputStreamReader isr = new InputStreamReader(is)) {
            VERSION = GSON.fromJson(isr, InceptumVersion.class);
        }
        if (args.length == 0) args = new String[]{"gui"};
        Command cmd = null;
        for (Command command : COMMANDS) {
            if (command.isAlias(args[0])) {
                cmd = command;
                break;
            }
        }
        if (cmd == null) {
            System.out.println("Command not found");
            return;
        }
        if (cmd.enableLog()) {
            LOGGER.info("Launching Inceptum v" + VERSION.version);
            LOGGER.info("Setting up cache dir");
        }
        if (!Files.exists(CONFIG_PATH.getParent())) Files.createDirectories(CONFIG_PATH.getParent());
        if (!Files.exists(CONFIG_PATH)) Utils.writeObject(CONFIG_PATH, new Config());
        CONFIG = Utils.loadObject(CONFIG_PATH, Config.class);
        if (!Files.exists(CACHE_DIR)) Files.createDirectories(CACHE_DIR);
        Utils.clearDirectory(CACHE_DIR);
        if (!Files.exists(INSTANCE_DIR)) Files.createDirectories(INSTANCE_DIR);
        if (!Files.exists(ASSETS_DIR)) Files.createDirectories(ASSETS_DIR);
        if (!Files.exists(LIBRARIES_DIR)) Files.createDirectories(LIBRARIES_DIR);

        cmd.invoke(args);
    }

    public static void saveConfig() {
        try {
            Utils.writeObject(CONFIG_PATH, CONFIG);
        } catch (IOException e) {
            LOGGER.error("Could not save config", e);
        }
    }

    public static void showError(String message, String title) {
        LOGGER.error(message);
        if (IS_GUI) InceptumGui.WINDOWS.add(new AlertWindow(title, message));
    }

    public static void showError(String message, Throwable t) {
        LOGGER.error(message, t);
        if (IS_GUI) InceptumGui.WINDOWS.add(new AlertWindow(message, t.toString()));
    }

    public static void showInfo(String message, String title) {
        LOGGER.info(message);
        if (IS_GUI) InceptumGui.WINDOWS.add(new AlertWindow(title, message));
    }

    public static void showOkCancel(String message, String title, Runnable ok, Runnable cancel) {
        LOGGER.info(message);
        if (IS_GUI) InceptumGui.WINDOWS.add(new AlertWindow(title, message, ok, cancel));
        else ok.run();
    }
}