package app.playmancala.game;

import app.playmancala.loop.Cancellable;
import app.playmancala.loop.Scheduler;

// The scheduled service that ends games whose running clock has reached zero, also when nobody is connected
// (docs/specs/game-clock, R2.2). A move that arrives late is refused by GameManager itself, so how often this runs
// only decides how soon the end is announced, never who wins.
public class GameClockScheduler {
    public static final long CLOCK_CHECK_INTERVAL_MS = 1_000;

    private final Runnable endGamesOutOfTime;
    private final Scheduler scheduler;
    private final long intervalMs;
    private Cancellable timer;

    public GameClockScheduler(Runnable endGamesOutOfTime, Scheduler scheduler, long intervalMs) {
        this.endGamesOutOfTime = endGamesOutOfTime;
        this.scheduler = scheduler;
        this.intervalMs = intervalMs;
    }

    public void start() {
        if (timer != null) return;
        timer = scheduler.scheduleAtFixedRate(endGamesOutOfTime, intervalMs);
    }

    public void stop() {
        if (timer != null) timer.cancel();
        timer = null;
    }
}