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//      Magicbane Emulator Project © 2013 - 2022
//                www.magicbane.com


package engine.devcmd.cmds;

import engine.devcmd.AbstractDevCmd;
import engine.gameManager.GracefulShutdown;
import engine.objects.AbstractGameObject;
import engine.objects.PlayerCharacter;

/**
 * Devcmd: graceful shutdown.
 *
 * Announces a countdown to every player, writes all online characters to the
 * database (skills/powers, stat modifiers, experience) and then stops the
 * login and world servers. Unlike './reboot' - which simply runs mbrestart.sh
 * and therefore kills the JVMs with SIGKILL - nothing still parked in a
 * deferred database job is lost.
 *
 * Usage: ./shutdown [seconds]  (default 60, maximum 3600)
 */
public class ShutdownCmd extends AbstractDevCmd {

    private static final int DEFAULT_DELAY_SECONDS = 60;
    private static final int MAX_DELAY_SECONDS = 3600;

    public ShutdownCmd() {
        super("shutdown");
    }

    @Override
    protected void _doCmd(PlayerCharacter pcSender, String[] args, AbstractGameObject target) {

        int delay = DEFAULT_DELAY_SECONDS;

        if (args.length > 0 && args[0].isEmpty() == false) {
            try {
                delay = Integer.parseInt(args[0].trim());
            } catch (NumberFormatException e) {
                this.sendUsage(pcSender);
                return;
            }
        }

        if (delay < 0)
            delay = 0;

        if (delay > MAX_DELAY_SECONDS)
            delay = MAX_DELAY_SECONDS;

        throwbackInfo(pcSender, "Graceful shutdown started: player data will be saved in " + delay + " second(s).");

        final int delaySeconds = delay;

        // The countdown sleeps, so run it off the message handling thread.

        Thread shutdownThread = new Thread(new Runnable() {

            @Override
            public void run() {
                GracefulShutdown.gracefulStop(delaySeconds);
            }
        }, "gracefulShutdown");

        shutdownThread.setDaemon(false);
        shutdownThread.start();
    }

    @Override
    protected String _getHelpString() {
        return "Gracefully shuts the server down: warns the players, saves every online character, then stops the servers";
    }

    @Override
    protected String _getUsageString() {
        return "' /shutdown [seconds]'";
    }
}