package net.minecraft.world.level.levelgen;

import net.minecraft.util.RandomSource;

public interface BitRandomSource extends RandomSource {
	float FLOAT_MULTIPLIER = 5.9604645E-8F;
	double DOUBLE_MULTIPLIER = 1.110223E-16F;

	int next(final int bits);

	@Override
	default int nextInt() {
		return this.next(32);
	}

	@Override
	default int nextInt(final int bound) {
		if (bound <= 0) {
			throw new IllegalArgumentException("Bound must be positive");
		} else if ((bound & bound - 1) == 0) {
			return (int)((long)bound * this.next(31) >> 31);
		} else {
			int sample;
			int modulo;
			do {
				sample = this.next(31);
				modulo = sample % bound;
			} while (sample - modulo + (bound - 1) < 0);

			return modulo;
		}
	}

	@Override
	default long nextLong() {
		int upper = this.next(32);
		int lower = this.next(32);
		long shifted = (long)upper << 32;
		return shifted + lower;
	}

	@Override
	default boolean nextBoolean() {
		return this.next(1) != 0;
	}

	@Override
	default float nextFloat() {
		return this.next(24) * 5.9604645E-8F;
	}

	@Override
	default double nextDouble() {
		int upper = this.next(26);
		int lower = this.next(27);
		long combined = ((long)upper << 27) + lower;
		return combined * 1.110223E-16F;
	}
}