package net.minecraft.client.renderer.chunk;

import java.util.Objects;
import net.fabricmc.api.EnvType;
import net.fabricmc.api.Environment;
import net.minecraft.core.SectionPos;
import net.minecraft.util.Mth;
import net.minecraft.world.phys.Vec3;

@Environment(EnvType.CLIENT)
public final class TranslucencyPointOfView {
	private int x;
	private int y;
	private int z;

	public static TranslucencyPointOfView of(final Vec3 cameraPos, final long sectionNode) {
		return new TranslucencyPointOfView().set(cameraPos, sectionNode);
	}

	public TranslucencyPointOfView set(final Vec3 cameraPos, final long sectionPos) {
		this.x = getCoordinate(cameraPos.x(), SectionPos.x(sectionPos));
		this.y = getCoordinate(cameraPos.y(), SectionPos.y(sectionPos));
		this.z = getCoordinate(cameraPos.z(), SectionPos.z(sectionPos));
		return this;
	}

	private static int getCoordinate(final double cameraCoordinate, final int section) {
		int relativeSection = SectionPos.blockToSectionCoord(cameraCoordinate) - section;
		return Mth.clamp(relativeSection, -1, 1);
	}

	public boolean isAxisAligned() {
		return this.x == 0 || this.y == 0 || this.z == 0;
	}

	public boolean equals(final Object other) {
		if (other == this) {
			return true;
		} else {
			return !(other instanceof TranslucencyPointOfView otherPerspective)
				? false
				: this.x == otherPerspective.x && this.y == otherPerspective.y && this.z == otherPerspective.z;
		}
	}

	public int hashCode() {
		return Objects.hash(new Object[]{this.x, this.y, this.z});
	}
}