package los.numeros.utils;

import net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents;

/**
 * class for dealing with minecraft ticks
 *
 */
public class MinecraftTick {
  /* interface for callbacks */
  public interface Callback {
    public void run(long delay);
  }

  /**
   * run callback on delay
   *
   * @param ticks minecraft ticks to wait before calling delay
   * @param callback callback to run after ticks delay
   */
  public void delayCallback(long ticks, MinecraftTick.Callback callback) {
    Delay delay = new Delay();
    delay.tickCallback = callback;

    /* register event to run on every server tick */
    /* TEST: I'm pretty sure this creates a new event every time this method is
     * called, but I could be wrong */
    ServerTickEvents.END_SERVER_TICK.register(event -> {
      /* check if we're done */
      if (delay.tickCounter == ticks) {
        /* run callback */
        delay.tickCallback.run(ticks);
        delay.tickCallbackRan = true;
        
        /* reset for next run */
        delay.tickCounter = 0L;
        return;
      }

      /* increment counter every tick */
      if (!delay.tickCallbackRan) {
        delay.tickCounter++;
      }
    });
    return;
  }

  /**
   * convert seconds to ticks
   *
   * @param seconds seconds
   * @return ticks
   */
  static public long secondToTick(int seconds) {
    return seconds * 20;
  }

  /**
   * convert ticks to seconds
   *
   * @param ticks minecraft ticks
   * @return seconds
   */
  static public int tickToSecond(long ticks) {
    return (int)(ticks / 20);
  }
}

/**
 * small class to deal with tick delay callbacks
 *
 */
class Delay {
  public long tickCounter = 0L;
  public boolean tickCallbackRan = false;
  public MinecraftTick.Callback tickCallback;
}