package net.minecraft.world;

import net.minecraft.util.TimeUtil;
import net.minecraft.world.entity.Entity;
import net.minecraft.world.entity.player.Player;

public class TickRateManager {
	public static final float MIN_TICKRATE = 1.0F;
	protected float tickrate = 20.0F;
	protected long nanosecondsPerTick = TimeUtil.NANOSECONDS_PER_SECOND / 20L;
	protected int frozenTicksToRun = 0;
	protected boolean runGameElements = true;
	protected boolean isFrozen = false;

	public void setTickRate(float tickRate) {
		this.tickrate = Math.max(tickRate, 1.0F);
		this.nanosecondsPerTick = (long)((double)TimeUtil.NANOSECONDS_PER_SECOND / this.tickrate);
	}

	public float tickrate() {
		return this.tickrate;
	}

	public float millisecondsPerTick() {
		return (float)this.nanosecondsPerTick / (float)TimeUtil.NANOSECONDS_PER_MILLISECOND;
	}

	public long nanosecondsPerTick() {
		return this.nanosecondsPerTick;
	}

	public boolean runsNormally() {
		return this.runGameElements;
	}

	public boolean isSteppingForward() {
		return this.frozenTicksToRun > 0;
	}

	public void setFrozenTicksToRun(int frozenTicksToRun) {
		this.frozenTicksToRun = frozenTicksToRun;
	}

	public int frozenTicksToRun() {
		return this.frozenTicksToRun;
	}

	public void setFrozen(boolean frozen) {
		this.isFrozen = frozen;
	}

	public boolean isFrozen() {
		return this.isFrozen;
	}

	public void tick() {
		this.runGameElements = !this.isFrozen || this.frozenTicksToRun > 0;
		if (this.frozenTicksToRun > 0) {
			this.frozenTicksToRun--;
		}
	}

	public boolean isEntityFrozen(Entity entity) {
		return !this.runsNormally() && !(entity instanceof Player) && entity.countPlayerPassengers() <= 0;
	}
}