package com.mojang.math;

import com.google.common.collect.Maps;
import com.mojang.datafixers.util.Pair;
import it.unimi.dsi.fastutil.booleans.BooleanArrayList;
import it.unimi.dsi.fastutil.booleans.BooleanList;
import java.util.Arrays;
import java.util.Map;
import java.util.stream.Collectors;
import net.minecraft.Util;
import net.minecraft.core.Direction;
import net.minecraft.core.FrontAndTop;
import net.minecraft.util.StringRepresentable;
import org.jetbrains.annotations.Nullable;
import org.joml.Matrix3f;

public enum OctahedralGroup implements StringRepresentable {
	IDENTITY("identity", SymmetricGroup3.P123, false, false, false),
	ROT_180_FACE_XY("rot_180_face_xy", SymmetricGroup3.P123, true, true, false),
	ROT_180_FACE_XZ("rot_180_face_xz", SymmetricGroup3.P123, true, false, true),
	ROT_180_FACE_YZ("rot_180_face_yz", SymmetricGroup3.P123, false, true, true),
	ROT_120_NNN("rot_120_nnn", SymmetricGroup3.P231, false, false, false),
	ROT_120_NNP("rot_120_nnp", SymmetricGroup3.P312, true, false, true),
	ROT_120_NPN("rot_120_npn", SymmetricGroup3.P312, false, true, true),
	ROT_120_NPP("rot_120_npp", SymmetricGroup3.P231, true, false, true),
	ROT_120_PNN("rot_120_pnn", SymmetricGroup3.P312, true, true, false),
	ROT_120_PNP("rot_120_pnp", SymmetricGroup3.P231, true, true, false),
	ROT_120_PPN("rot_120_ppn", SymmetricGroup3.P231, false, true, true),
	ROT_120_PPP("rot_120_ppp", SymmetricGroup3.P312, false, false, false),
	ROT_180_EDGE_XY_NEG("rot_180_edge_xy_neg", SymmetricGroup3.P213, true, true, true),
	ROT_180_EDGE_XY_POS("rot_180_edge_xy_pos", SymmetricGroup3.P213, false, false, true),
	ROT_180_EDGE_XZ_NEG("rot_180_edge_xz_neg", SymmetricGroup3.P321, true, true, true),
	ROT_180_EDGE_XZ_POS("rot_180_edge_xz_pos", SymmetricGroup3.P321, false, true, false),
	ROT_180_EDGE_YZ_NEG("rot_180_edge_yz_neg", SymmetricGroup3.P132, true, true, true),
	ROT_180_EDGE_YZ_POS("rot_180_edge_yz_pos", SymmetricGroup3.P132, true, false, false),
	ROT_90_X_NEG("rot_90_x_neg", SymmetricGroup3.P132, false, false, true),
	ROT_90_X_POS("rot_90_x_pos", SymmetricGroup3.P132, false, true, false),
	ROT_90_Y_NEG("rot_90_y_neg", SymmetricGroup3.P321, true, false, false),
	ROT_90_Y_POS("rot_90_y_pos", SymmetricGroup3.P321, false, false, true),
	ROT_90_Z_NEG("rot_90_z_neg", SymmetricGroup3.P213, false, true, false),
	ROT_90_Z_POS("rot_90_z_pos", SymmetricGroup3.P213, true, false, false),
	INVERSION("inversion", SymmetricGroup3.P123, true, true, true),
	INVERT_X("invert_x", SymmetricGroup3.P123, true, false, false),
	INVERT_Y("invert_y", SymmetricGroup3.P123, false, true, false),
	INVERT_Z("invert_z", SymmetricGroup3.P123, false, false, true),
	ROT_60_REF_NNN("rot_60_ref_nnn", SymmetricGroup3.P312, true, true, true),
	ROT_60_REF_NNP("rot_60_ref_nnp", SymmetricGroup3.P231, true, false, false),
	ROT_60_REF_NPN("rot_60_ref_npn", SymmetricGroup3.P231, false, false, true),
	ROT_60_REF_NPP("rot_60_ref_npp", SymmetricGroup3.P312, false, false, true),
	ROT_60_REF_PNN("rot_60_ref_pnn", SymmetricGroup3.P231, false, true, false),
	ROT_60_REF_PNP("rot_60_ref_pnp", SymmetricGroup3.P312, true, false, false),
	ROT_60_REF_PPN("rot_60_ref_ppn", SymmetricGroup3.P312, false, true, false),
	ROT_60_REF_PPP("rot_60_ref_ppp", SymmetricGroup3.P231, true, true, true),
	SWAP_XY("swap_xy", SymmetricGroup3.P213, false, false, false),
	SWAP_YZ("swap_yz", SymmetricGroup3.P132, false, false, false),
	SWAP_XZ("swap_xz", SymmetricGroup3.P321, false, false, false),
	SWAP_NEG_XY("swap_neg_xy", SymmetricGroup3.P213, true, true, false),
	SWAP_NEG_YZ("swap_neg_yz", SymmetricGroup3.P132, false, true, true),
	SWAP_NEG_XZ("swap_neg_xz", SymmetricGroup3.P321, true, false, true),
	ROT_90_REF_X_NEG("rot_90_ref_x_neg", SymmetricGroup3.P132, true, false, true),
	ROT_90_REF_X_POS("rot_90_ref_x_pos", SymmetricGroup3.P132, true, true, false),
	ROT_90_REF_Y_NEG("rot_90_ref_y_neg", SymmetricGroup3.P321, true, true, false),
	ROT_90_REF_Y_POS("rot_90_ref_y_pos", SymmetricGroup3.P321, false, true, true),
	ROT_90_REF_Z_NEG("rot_90_ref_z_neg", SymmetricGroup3.P213, false, true, true),
	ROT_90_REF_Z_POS("rot_90_ref_z_pos", SymmetricGroup3.P213, true, false, true);

	private final Matrix3f transformation;
	private final String name;
	@Nullable
	private Map<Direction, Direction> rotatedDirections;
	private final boolean invertX;
	private final boolean invertY;
	private final boolean invertZ;
	private final SymmetricGroup3 permutation;
	private static final OctahedralGroup[][] cayleyTable = Util.make(
		new OctahedralGroup[values().length][values().length],
		octahedralGroups -> {
			Map<Pair<SymmetricGroup3, BooleanList>, OctahedralGroup> map = (Map<Pair<SymmetricGroup3, BooleanList>, OctahedralGroup>)Arrays.stream(values())
				.collect(
					Collectors.toMap(octahedralGroupx -> Pair.of(octahedralGroupx.permutation, octahedralGroupx.packInversions()), octahedralGroupx -> octahedralGroupx)
				);

			for (OctahedralGroup octahedralGroup : values()) {
				for (OctahedralGroup octahedralGroup2 : values()) {
					BooleanList booleanList = octahedralGroup.packInversions();
					BooleanList booleanList2 = octahedralGroup2.packInversions();
					SymmetricGroup3 symmetricGroup3 = octahedralGroup2.permutation.compose(octahedralGroup.permutation);
					BooleanArrayList booleanArrayList = new BooleanArrayList(3);

					for (int i = 0; i < 3; i++) {
						booleanArrayList.add(booleanList.getBoolean(i) ^ booleanList2.getBoolean(octahedralGroup.permutation.permutation(i)));
					}

					octahedralGroups[octahedralGroup.ordinal()][octahedralGroup2.ordinal()] = (OctahedralGroup)map.get(Pair.of(symmetricGroup3, booleanArrayList));
				}
			}
		}
	);
	private static final OctahedralGroup[] inverseTable = (OctahedralGroup[])Arrays.stream(values())
		.map(
			octahedralGroup -> (OctahedralGroup)Arrays.stream(values())
				.filter(octahedralGroup2 -> octahedralGroup.compose(octahedralGroup2) == IDENTITY)
				.findAny()
				.get()
		)
		.toArray(OctahedralGroup[]::new);

	private OctahedralGroup(final String name, final SymmetricGroup3 permutation, final boolean invertX, final boolean invertY, final boolean invertZ) {
		this.name = name;
		this.invertX = invertX;
		this.invertY = invertY;
		this.invertZ = invertZ;
		this.permutation = permutation;
		this.transformation = new Matrix3f().scaling(invertX ? -1.0F : 1.0F, invertY ? -1.0F : 1.0F, invertZ ? -1.0F : 1.0F);
		this.transformation.mul(permutation.transformation());
	}

	private BooleanList packInversions() {
		return new BooleanArrayList(new boolean[]{this.invertX, this.invertY, this.invertZ});
	}

	public OctahedralGroup compose(OctahedralGroup other) {
		return cayleyTable[this.ordinal()][other.ordinal()];
	}

	public OctahedralGroup inverse() {
		return inverseTable[this.ordinal()];
	}

	public Matrix3f transformation() {
		return new Matrix3f(this.transformation);
	}

	public String toString() {
		return this.name;
	}

	@Override
	public String getSerializedName() {
		return this.name;
	}

	public Direction rotate(Direction direction) {
		if (this.rotatedDirections == null) {
			this.rotatedDirections = Maps.newEnumMap(Direction.class);
			Direction.Axis[] axiss = Direction.Axis.values();

			for (Direction direction2 : Direction.values()) {
				Direction.Axis axis = direction2.getAxis();
				Direction.AxisDirection axisDirection = direction2.getAxisDirection();
				Direction.Axis axis2 = axiss[this.permutation.permutation(axis.ordinal())];
				Direction.AxisDirection axisDirection2 = this.inverts(axis2) ? axisDirection.opposite() : axisDirection;
				Direction direction3 = Direction.fromAxisAndDirection(axis2, axisDirection2);
				this.rotatedDirections.put(direction2, direction3);
			}
		}

		return (Direction)this.rotatedDirections.get(direction);
	}

	public boolean inverts(Direction.Axis axis) {
		switch (axis) {
			case X:
				return this.invertX;
			case Y:
				return this.invertY;
			case Z:
			default:
				return this.invertZ;
		}
	}

	public FrontAndTop rotate(FrontAndTop frontAndTop) {
		return FrontAndTop.fromFrontAndTop(this.rotate(frontAndTop.front()), this.rotate(frontAndTop.top()));
	}
}