Inceptum/src/main/java/io/gitlab/jfronny/inceptum/cli/LaunchCommand.java

package io.gitlab.jfronny.inceptum.cli;

import io.gitlab.jfronny.inceptum.Inceptum;
import io.gitlab.jfronny.inceptum.model.inceptum.InstanceMeta;
import io.gitlab.jfronny.inceptum.util.ClientLauncher;
import io.gitlab.jfronny.inceptum.util.ProcessUtils;
import io.gitlab.jfronny.inceptum.util.ServerLauncher;
import io.gitlab.jfronny.inceptum.util.Utils;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.Locale;

public class LaunchCommand extends Command {
    public LaunchCommand() {
        super("Launches the game. Optionally specify \"server\" or \"client\"", "run", "launch", "start");
    }

    @Override
    public void invoke(String[] args) {
        if (args.length < 2) {
            Inceptum.LOGGER.error("You must provide an instance name or path");
            return;
        }
        String pArg = args.length == 2 ? args[1] : args[2];
        Path instanceDir = Files.exists(Path.of(pArg)) ? Path.of(pArg) : Inceptum.INSTANCE_DIR.resolve(pArg);
        if (!Files.exists(instanceDir.resolve("instance.json"))) {
            Inceptum.LOGGER.error("Not a valid instance");
            return;
        }
        if (Files.exists(instanceDir.resolve("inceptum.setup.lock"))) {
            Inceptum.LOGGER.error("This instance is still being set up");
            return;
        }
        if (Files.exists(instanceDir.resolve("inceptum.lock"))) {
            try {
                if (ProcessUtils.isProcessAlive(Files.readString(instanceDir.resolve("inceptum.lock")))) {
                    Inceptum.LOGGER.error("This instance is already being ran");
                    return;
                }
            } catch (IOException e) {
                Inceptum.showError("Could not read inceptum lock", e);
                return;
            }
        }
        InstanceMeta instance;
        try {
            instance = Utils.loadObject(instanceDir.resolve("instance.json"), InstanceMeta.class);
        } catch (IOException e) {
            Inceptum.showError("Not a valid instance", e);
            return;
        }
        if (args.length > 3) {
            instance.gameArgsCustom = instance.gameArgsCustom == null ? new ArrayList<>() : new ArrayList<>(instance.gameArgsCustom);
            for (int i = 3, argsLength = args.length; i < argsLength; i++) {
                instance.gameArgsCustom.add(args[i]);
            }
        }
        if (args.length >= 3 && "server".equals(args[1].toLowerCase(Locale.ROOT)))
            ServerLauncher.launch(instanceDir, instance);
        else ClientLauncher.launch(instanceDir, instance);
    }
}