package net.minecraft.util;

import com.mojang.logging.LogUtils;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.Executor;
import java.util.function.Consumer;
import org.slf4j.Logger;

@FunctionalInterface
public interface TaskChainer {
	Logger LOGGER = LogUtils.getLogger();

	static TaskChainer immediate(final Executor executor) {
		return new TaskChainer() {
			@Override
			public <T> void append(final CompletableFuture<T> preparation, final Consumer<T> chainedTask) {
				preparation.thenAcceptAsync(chainedTask, executor).exceptionally(e -> {
					LOGGER.error("Task failed", e);
					return null;
				});
			}
		};
	}

	default void append(final Runnable task) {
		this.append(CompletableFuture.completedFuture(null), ignored -> task.run());
	}

	<T> void append(CompletableFuture<T> preparation, Consumer<T> chainedTask);
}