package net.minecraft;

import java.util.Collection;
import java.util.Iterator;
import java.util.Objects;
import java.util.function.Function;
import java.util.function.Supplier;
import org.jspecify.annotations.Nullable;

public class Optionull {
	@Deprecated
	public static <T> T orElse(@Nullable final T t, final T defaultValue) {
		return (T)Objects.requireNonNullElse(t, defaultValue);
	}

	@Nullable
	public static <T, R> R map(@Nullable final T t, final Function<T, R> map) {
		return (R)(t == null ? null : map.apply(t));
	}

	public static <T, R> R mapOrDefault(@Nullable final T t, final Function<T, R> map, final R defaultValue) {
		return (R)(t == null ? defaultValue : map.apply(t));
	}

	public static <T, R> R mapOrElse(@Nullable final T t, final Function<T, R> map, final Supplier<R> elseSupplier) {
		return (R)(t == null ? elseSupplier.get() : map.apply(t));
	}

	@Nullable
	public static <T> T first(final Collection<T> collection) {
		Iterator<T> iterator = collection.iterator();
		return (T)(iterator.hasNext() ? iterator.next() : null);
	}

	public static <T> T firstOrDefault(final Collection<T> collection, final T defaultValue) {
		Iterator<T> iterator = collection.iterator();
		return (T)(iterator.hasNext() ? iterator.next() : defaultValue);
	}

	public static <T> T firstOrElse(final Collection<T> collection, final Supplier<T> elseSupplier) {
		Iterator<T> iterator = collection.iterator();
		return (T)(iterator.hasNext() ? iterator.next() : elseSupplier.get());
	}

	public static <T> boolean isNullOrEmpty(@Nullable final T[] t) {
		return t == null || t.length == 0;
	}

	public static boolean isNullOrEmpty(@Nullable final boolean[] t) {
		return t == null || t.length == 0;
	}

	public static boolean isNullOrEmpty(@Nullable final byte[] t) {
		return t == null || t.length == 0;
	}

	public static boolean isNullOrEmpty(@Nullable final char[] t) {
		return t == null || t.length == 0;
	}

	public static boolean isNullOrEmpty(@Nullable final short[] t) {
		return t == null || t.length == 0;
	}

	public static boolean isNullOrEmpty(@Nullable final int[] t) {
		return t == null || t.length == 0;
	}

	public static boolean isNullOrEmpty(@Nullable final long[] t) {
		return t == null || t.length == 0;
	}

	public static boolean isNullOrEmpty(@Nullable final float[] t) {
		return t == null || t.length == 0;
	}

	public static boolean isNullOrEmpty(@Nullable final double[] t) {
		return t == null || t.length == 0;
	}
}