package net.minecraft.world.level.levelgen.structure.templatesystem;

import com.mojang.serialization.Codec;
import com.mojang.serialization.MapCodec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import net.minecraft.core.BlockPos;
import net.minecraft.util.Mth;
import net.minecraft.util.RandomSource;

public class LinearPosTest extends PosRuleTest {
	public static final MapCodec<LinearPosTest> CODEC = RecordCodecBuilder.mapCodec(
		instance -> instance.group(
				Codec.FLOAT.fieldOf("min_chance").orElse(0.0F).forGetter(linearPosTest -> linearPosTest.minChance),
				Codec.FLOAT.fieldOf("max_chance").orElse(0.0F).forGetter(linearPosTest -> linearPosTest.maxChance),
				Codec.INT.fieldOf("min_dist").orElse(0).forGetter(linearPosTest -> linearPosTest.minDist),
				Codec.INT.fieldOf("max_dist").orElse(0).forGetter(linearPosTest -> linearPosTest.maxDist)
			)
			.apply(instance, LinearPosTest::new)
	);
	private final float minChance;
	private final float maxChance;
	private final int minDist;
	private final int maxDist;

	public LinearPosTest(float minChance, float maxChance, int minDist, int maxDist) {
		if (minDist >= maxDist) {
			throw new IllegalArgumentException("Invalid range: [" + minDist + "," + maxDist + "]");
		} else {
			this.minChance = minChance;
			this.maxChance = maxChance;
			this.minDist = minDist;
			this.maxDist = maxDist;
		}
	}

	@Override
	public boolean test(BlockPos localPos, BlockPos relativePos, BlockPos structurePos, RandomSource random) {
		int i = relativePos.distManhattan(structurePos);
		float f = random.nextFloat();
		return f <= Mth.clampedLerp(this.minChance, this.maxChance, Mth.inverseLerp((float)i, (float)this.minDist, (float)this.maxDist));
	}

	@Override
	protected PosRuleTestType<?> getType() {
		return PosRuleTestType.LINEAR_POS_TEST;
	}
}