package com.mojang.math;

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;
import org.joml.Matrix3fc;

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 static final Direction.Axis[] AXES = Direction.Axis.values();
	private final Matrix3fc 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[][] CAYLEY_TABLE = 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[] INVERSE_TABLE = (OctahedralGroup[])Arrays.stream(values())
		.map(
			octahedralGroup -> (OctahedralGroup)Arrays.stream(values())
				.filter(octahedralGroup2 -> octahedralGroup.compose(octahedralGroup2) == IDENTITY)
				.findAny()
				.get()
		)
		.toArray(OctahedralGroup[]::new);
	private static final OctahedralGroup[][] XY_TABLE = Util.make(new OctahedralGroup[Quadrant.values().length][Quadrant.values().length], octahedralGroups -> {
		for (Quadrant quadrant : Quadrant.values()) {
			for (Quadrant quadrant2 : Quadrant.values()) {
				OctahedralGroup octahedralGroup = IDENTITY;

				for (int i = 0; i < quadrant2.shift; i++) {
					octahedralGroup = octahedralGroup.compose(ROT_90_Y_NEG);
				}

				for (int i = 0; i < quadrant.shift; i++) {
					octahedralGroup = octahedralGroup.compose(ROT_90_X_NEG);
				}

				octahedralGroups[quadrant.ordinal()][quadrant2.ordinal()] = octahedralGroup;
			}
		}
	});

	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;
		Matrix3f matrix3f = new Matrix3f().scaling(invertX ? -1.0F : 1.0F, invertY ? -1.0F : 1.0F, invertZ ? -1.0F : 1.0F);
		matrix3f.mul(permutation.transformation());
		this.transformation = matrix3f;
	}

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

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

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

	public Matrix3fc transformation() {
		return 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 = Util.makeEnumMap(Direction.class, directionx -> {
				Direction.Axis axis = directionx.getAxis();
				Direction.AxisDirection axisDirection = directionx.getAxisDirection();
				Direction.Axis axis2 = this.permute(axis);
				Direction.AxisDirection axisDirection2 = this.inverts(axis2) ? axisDirection.opposite() : axisDirection;
				return Direction.fromAxisAndDirection(axis2, axisDirection2);
			});
		}

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

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

	public Direction.Axis permute(Direction.Axis axis) {
		return AXES[this.permutation.permutation(axis.ordinal())];
	}

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

	public static OctahedralGroup fromXYAngles(Quadrant x, Quadrant y) {
		return XY_TABLE[x.ordinal()][y.ordinal()];
	}
}