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(
		i -> i.group(
				Codec.FLOAT.optionalFieldOf("min_chance", 0.0F).forGetter(p -> p.minChance),
				Codec.FLOAT.optionalFieldOf("max_chance", 0.0F).forGetter(p -> p.maxChance),
				Codec.INT.optionalFieldOf("min_dist", 0).forGetter(p -> p.minDist),
				Codec.INT.optionalFieldOf("max_dist", 0).forGetter(p -> p.maxDist)
			)
			.apply(i, LinearPosTest::new)
	);
	private final float minChance;
	private final float maxChance;
	private final int minDist;
	private final int maxDist;

	public LinearPosTest(final float minChance, final float maxChance, final int minDist, final 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(final BlockPos inTemplatePos, final BlockPos worldPos, final BlockPos worldReference, final RandomSource random) {
		int dist = worldPos.distManhattan(worldReference);
		float rnd = random.nextFloat();
		return rnd <= Mth.clampedLerp(Mth.inverseLerp((float)dist, (float)this.minDist, (float)this.maxDist), this.minChance, this.maxChance);
	}

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