package net.minecraft.world.level.levelgen.heightproviders;

import com.mojang.logging.LogUtils;
import com.mojang.serialization.Codec;
import com.mojang.serialization.MapCodec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import com.mojang.serialization.codecs.RecordCodecBuilder.Instance;
import net.minecraft.util.Mth;
import net.minecraft.util.RandomSource;
import net.minecraft.world.level.levelgen.VerticalAnchor;
import net.minecraft.world.level.levelgen.WorldGenerationContext;
import org.slf4j.Logger;

public class VeryBiasedToBottomHeight extends HeightProvider {
    public static final MapCodec<VeryBiasedToBottomHeight> CODEC = RecordCodecBuilder.mapCodec(
        p_162057_ -> p_162057_.group(
                VerticalAnchor.CODEC.fieldOf("min_inclusive").forGetter(p_162070_ -> p_162070_.minInclusive),
                VerticalAnchor.CODEC.fieldOf("max_inclusive").forGetter(p_162068_ -> p_162068_.maxInclusive),
                Codec.intRange(1, Integer.MAX_VALUE).optionalFieldOf("inner", 1).forGetter(p_162063_ -> p_162063_.inner)
            )
            .apply(p_162057_, VeryBiasedToBottomHeight::new)
    );
    private static final Logger LOGGER = LogUtils.getLogger();
    private final VerticalAnchor minInclusive;
    private final VerticalAnchor maxInclusive;
    private final int inner;

    private VeryBiasedToBottomHeight(VerticalAnchor p_162052_, VerticalAnchor p_162053_, int p_162054_) {
        this.minInclusive = p_162052_;
        this.maxInclusive = p_162053_;
        this.inner = p_162054_;
    }

    public static VeryBiasedToBottomHeight of(VerticalAnchor p_162059_, VerticalAnchor p_162060_, int p_162061_) {
        return new VeryBiasedToBottomHeight(p_162059_, p_162060_, p_162061_);
    }

    @Override
    public int sample(RandomSource p_226311_, WorldGenerationContext p_226312_) {
        int i = this.minInclusive.resolveY(p_226312_);
        int j = this.maxInclusive.resolveY(p_226312_);
        if (j - i - this.inner + 1 <= 0) {
            LOGGER.warn("Empty height range: {}", this);
            return i;
        } else {
            int k = Mth.nextInt(p_226311_, i + this.inner, j);
            int l = Mth.nextInt(p_226311_, i, k - 1);
            return Mth.nextInt(p_226311_, i, l - 1 + this.inner);
        }
    }

    @Override
    public HeightProviderType<?> getType() {
        return HeightProviderType.VERY_BIASED_TO_BOTTOM;
    }

    @Override
    public String toString() {
        return "biased[" + this.minInclusive + "-" + this.maxInclusive + " inner: " + this.inner + "]";
    }
}