package net.minecraft.world.timeline;

import java.util.Optional;
import net.minecraft.core.Holder;
import net.minecraft.util.KeyframeTrack;
import net.minecraft.util.KeyframeTrackSampler;
import net.minecraft.world.attribute.EnvironmentAttributeLayer;
import net.minecraft.world.attribute.LerpFunction;
import net.minecraft.world.attribute.modifier.AttributeModifier;
import net.minecraft.world.clock.ClockManager;
import net.minecraft.world.clock.WorldClock;
import org.jspecify.annotations.Nullable;

public class AttributeTrackSampler<Value, Argument> implements EnvironmentAttributeLayer.TimeBased<Value> {
	private final Holder<WorldClock> clock;
	private final AttributeModifier<Value, Argument> modifier;
	private final KeyframeTrackSampler<Argument> argumentSampler;
	private final ClockManager clockManager;
	private int cachedTickId;
	@Nullable
	private Argument cachedArgument;

	public AttributeTrackSampler(
		final Holder<WorldClock> clock,
		final Optional<Integer> periodTicks,
		final AttributeModifier<Value, Argument> modifier,
		final KeyframeTrack<Argument> argumentTrack,
		final LerpFunction<Argument> argumentLerp,
		final ClockManager clockManager
	) {
		this.clock = clock;
		this.modifier = modifier;
		this.clockManager = clockManager;
		this.argumentSampler = argumentTrack.bakeSampler(periodTicks, argumentLerp);
	}

	@Override
	public Value applyTimeBased(final Value baseValue, final int cacheTickId) {
		if (this.cachedArgument == null || cacheTickId != this.cachedTickId) {
			this.cachedTickId = cacheTickId;
			this.cachedArgument = this.argumentSampler.sample(this.clockManager.getTotalTicks(this.clock));
		}

		return this.modifier.apply(baseValue, this.cachedArgument);
	}
}