package net.minecraft.util;

import com.google.common.base.Predicate;
import com.google.common.collect.Iterators;
import com.google.common.collect.Maps;
import java.util.Iterator;
import java.util.Locale;
import java.util.Map;
import java.util.Random;
import javax.annotation.Nullable;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.MathHelper;
import net.minecraft.util.math.Vec3i;

public enum EnumFacing implements IStringSerializable
{
    DOWN(0, 1, -1, "down", EnumFacing.AxisDirection.NEGATIVE, EnumFacing.Axis.Y, new Vec3i(0, -1, 0)),
    UP(1, 0, -1, "up", EnumFacing.AxisDirection.POSITIVE, EnumFacing.Axis.Y, new Vec3i(0, 1, 0)),
    NORTH(2, 3, 2, "north", EnumFacing.AxisDirection.NEGATIVE, EnumFacing.Axis.Z, new Vec3i(0, 0, -1)),
    SOUTH(3, 2, 0, "south", EnumFacing.AxisDirection.POSITIVE, EnumFacing.Axis.Z, new Vec3i(0, 0, 1)),
    WEST(4, 5, 1, "west", EnumFacing.AxisDirection.NEGATIVE, EnumFacing.Axis.X, new Vec3i(-1, 0, 0)),
    EAST(5, 4, 3, "east", EnumFacing.AxisDirection.POSITIVE, EnumFacing.Axis.X, new Vec3i(1, 0, 0));

    /** Ordering index for D-U-N-S-W-E */
    private final int index;
    /** Index of the opposite Facing in the VALUES array */
    private final int opposite;
    /** Ordering index for the HORIZONTALS field (S-W-N-E) */
    private final int horizontalIndex;
    private final String name;
    private final EnumFacing.Axis axis;
    private final EnumFacing.AxisDirection axisDirection;
    /** Normalized Vector that points in the direction of this Facing */
    private final Vec3i directionVec;
    /** All facings in D-U-N-S-W-E order */
    public static final EnumFacing[] VALUES = new EnumFacing[6];
    /** All Facings with horizontal axis in order S-W-N-E */
    public static final EnumFacing[] HORIZONTALS = new EnumFacing[4];
    private static final Map<String, EnumFacing> NAME_LOOKUP = Maps.<String, EnumFacing>newHashMap();

    private EnumFacing(int indexIn, int oppositeIn, int horizontalIndexIn, String nameIn, EnumFacing.AxisDirection axisDirectionIn, EnumFacing.Axis axisIn, Vec3i directionVecIn)
    {
        this.index = indexIn;
        this.horizontalIndex = horizontalIndexIn;
        this.opposite = oppositeIn;
        this.name = nameIn;
        this.axis = axisIn;
        this.axisDirection = axisDirectionIn;
        this.directionVec = directionVecIn;
    }

    /**
     * Get the Index of this Facing (0-5). The order is D-U-N-S-W-E
     */
    public int getIndex()
    {
        return this.index;
    }

    /**
     * Get the index of this horizontal facing (0-3). The order is S-W-N-E
     */
    public int getHorizontalIndex()
    {
        return this.horizontalIndex;
    }

    /**
     * Get the AxisDirection of this Facing.
     */
    public EnumFacing.AxisDirection getAxisDirection()
    {
        return this.axisDirection;
    }

    /**
     * Get the opposite Facing (e.g. DOWN => UP)
     */
    public EnumFacing getOpposite()
    {
        return getFront(this.opposite);
    }

    /**
     * Rotate this Facing around the given axis clockwise. If this facing cannot be rotated around the given axis,
     * returns this facing without rotating.
     */
    public EnumFacing rotateAround(EnumFacing.Axis axis)
    {
        switch (axis)
        {
            case X:

                if (this != WEST && this != EAST)
                {
                    return this.rotateX();
                }

                return this;
            case Y:

                if (this != UP && this != DOWN)
                {
                    return this.rotateY();
                }

                return this;
            case Z:

                if (this != NORTH && this != SOUTH)
                {
                    return this.rotateZ();
                }

                return this;
            default:
                throw new IllegalStateException("Unable to get CW facing for axis " + axis);
        }
    }

    /**
     * Rotate this Facing around the Y axis clockwise (NORTH => EAST => SOUTH => WEST => NORTH)
     */
    public EnumFacing rotateY()
    {
        switch (this)
        {
            case NORTH:
                return EAST;
            case EAST:
                return SOUTH;
            case SOUTH:
                return WEST;
            case WEST:
                return NORTH;
            default:
                throw new IllegalStateException("Unable to get Y-rotated facing of " + this);
        }
    }

    /**
     * Rotate this Facing around the X axis (NORTH => DOWN => SOUTH => UP => NORTH)
     */
    private EnumFacing rotateX()
    {
        switch (this)
        {
            case NORTH:
                return DOWN;
            case EAST:
            case WEST:
            default:
                throw new IllegalStateException("Unable to get X-rotated facing of " + this);
            case SOUTH:
                return UP;
            case UP:
                return NORTH;
            case DOWN:
                return SOUTH;
        }
    }

    /**
     * Rotate this Facing around the Z axis (EAST => DOWN => WEST => UP => EAST)
     */
    private EnumFacing rotateZ()
    {
        switch (this)
        {
            case EAST:
                return DOWN;
            case SOUTH:
            default:
                throw new IllegalStateException("Unable to get Z-rotated facing of " + this);
            case WEST:
                return UP;
            case UP:
                return EAST;
            case DOWN:
                return WEST;
        }
    }

    /**
     * Rotate this Facing around the Y axis counter-clockwise (NORTH => WEST => SOUTH => EAST => NORTH)
     */
    public EnumFacing rotateYCCW()
    {
        switch (this)
        {
            case NORTH:
                return WEST;
            case EAST:
                return NORTH;
            case SOUTH:
                return EAST;
            case WEST:
                return SOUTH;
            default:
                throw new IllegalStateException("Unable to get CCW facing of " + this);
        }
    }

    /**
     * Returns a offset that addresses the block in front of this facing.
     */
    public int getFrontOffsetX()
    {
        return this.axis == EnumFacing.Axis.X ? this.axisDirection.getOffset() : 0;
    }

    public int getFrontOffsetY()
    {
        return this.axis == EnumFacing.Axis.Y ? this.axisDirection.getOffset() : 0;
    }

    /**
     * Returns a offset that addresses the block in front of this facing.
     */
    public int getFrontOffsetZ()
    {
        return this.axis == EnumFacing.Axis.Z ? this.axisDirection.getOffset() : 0;
    }

    /**
     * Same as getName, but does not override the method from Enum.
     */
    public String getName2()
    {
        return this.name;
    }

    public EnumFacing.Axis getAxis()
    {
        return this.axis;
    }

    /**
     * Get the facing specified by the given name
     */
    @Nullable
    public static EnumFacing byName(String name)
    {
        return name == null ? null : (EnumFacing)NAME_LOOKUP.get(name.toLowerCase(Locale.ROOT));
    }

    /**
     * Get a Facing by it's index (0-5). The order is D-U-N-S-W-E. Named getFront for legacy reasons.
     */
    public static EnumFacing getFront(int index)
    {
        return VALUES[MathHelper.abs(index % VALUES.length)];
    }

    /**
     * Get a Facing by it's horizontal index (0-3). The order is S-W-N-E.
     */
    public static EnumFacing getHorizontal(int horizontalIndexIn)
    {
        return HORIZONTALS[MathHelper.abs(horizontalIndexIn % HORIZONTALS.length)];
    }

    /**
     * Get the Facing corresponding to the given angle (0-360). An angle of 0 is SOUTH, an angle of 90 would be WEST.
     */
    public static EnumFacing fromAngle(double angle)
    {
        return getHorizontal(MathHelper.floor(angle / 90.0D + 0.5D) & 3);
    }

    public float getHorizontalAngle()
    {
        return (float)((this.horizontalIndex & 3) * 90);
    }

    /**
     * Choose a random Facing using the given Random
     */
    public static EnumFacing random(Random rand)
    {
        return values()[rand.nextInt(values().length)];
    }

    public static EnumFacing getFacingFromVector(float x, float y, float z)
    {
        EnumFacing enumfacing = NORTH;
        float f = Float.MIN_VALUE;

        for (EnumFacing enumfacing1 : values())
        {
            float f1 = x * (float)enumfacing1.directionVec.getX() + y * (float)enumfacing1.directionVec.getY() + z * (float)enumfacing1.directionVec.getZ();

            if (f1 > f)
            {
                f = f1;
                enumfacing = enumfacing1;
            }
        }

        return enumfacing;
    }

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

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

    public static EnumFacing getFacingFromAxis(EnumFacing.AxisDirection axisDirectionIn, EnumFacing.Axis axisIn)
    {
        for (EnumFacing enumfacing : values())
        {
            if (enumfacing.getAxisDirection() == axisDirectionIn && enumfacing.getAxis() == axisIn)
            {
                return enumfacing;
            }
        }

        throw new IllegalArgumentException("No such direction: " + axisDirectionIn + " " + axisIn);
    }

    public static EnumFacing getDirectionFromEntityLiving(BlockPos pos, EntityLivingBase placer)
    {
        if (Math.abs(placer.posX - (double)((float)pos.getX() + 0.5F)) < 2.0D && Math.abs(placer.posZ - (double)((float)pos.getZ() + 0.5F)) < 2.0D)
        {
            double d0 = placer.posY + (double)placer.getEyeHeight();

            if (d0 - (double)pos.getY() > 2.0D)
            {
                return UP;
            }

            if ((double)pos.getY() - d0 > 0.0D)
            {
                return DOWN;
            }
        }

        return placer.getHorizontalFacing().getOpposite();
    }

    /**
     * Get a normalized Vector that points in the direction of this Facing.
     */
    public Vec3i getDirectionVec()
    {
        return this.directionVec;
    }

    static
    {
        for (EnumFacing enumfacing : values())
        {
            VALUES[enumfacing.index] = enumfacing;

            if (enumfacing.getAxis().isHorizontal())
            {
                HORIZONTALS[enumfacing.horizontalIndex] = enumfacing;
            }

            NAME_LOOKUP.put(enumfacing.getName2().toLowerCase(Locale.ROOT), enumfacing);
        }
    }

    public static enum Axis implements Predicate<EnumFacing>, IStringSerializable {
        X("x", EnumFacing.Plane.HORIZONTAL),
        Y("y", EnumFacing.Plane.VERTICAL),
        Z("z", EnumFacing.Plane.HORIZONTAL);

        private static final Map<String, EnumFacing.Axis> NAME_LOOKUP = Maps.<String, EnumFacing.Axis>newHashMap();
        private final String name;
        private final EnumFacing.Plane plane;

        private Axis(String name, EnumFacing.Plane plane)
        {
            this.name = name;
            this.plane = plane;
        }

        /**
         * Get the axis specified by the given name
         */
        @Nullable
        public static EnumFacing.Axis byName(String name)
        {
            return name == null ? null : (EnumFacing.Axis)NAME_LOOKUP.get(name.toLowerCase(Locale.ROOT));
        }

        /**
         * Like getName but doesn't override the method from Enum.
         */
        public String getName2()
        {
            return this.name;
        }

        /**
         * If this Axis is on the vertical plane (Only true for Y)
         */
        public boolean isVertical()
        {
            return this.plane == EnumFacing.Plane.VERTICAL;
        }

        /**
         * If this Axis is on the horizontal plane (true for X and Z)
         */
        public boolean isHorizontal()
        {
            return this.plane == EnumFacing.Plane.HORIZONTAL;
        }

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

        public boolean apply(@Nullable EnumFacing p_apply_1_)
        {
            return p_apply_1_ != null && p_apply_1_.getAxis() == this;
        }

        /**
         * Get this Axis' Plane (VERTICAL for Y, HORIZONTAL for X and Z)
         */
        public EnumFacing.Plane getPlane()
        {
            return this.plane;
        }

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

        static
        {
            for (EnumFacing.Axis enumfacing$axis : values())
            {
                NAME_LOOKUP.put(enumfacing$axis.getName2().toLowerCase(Locale.ROOT), enumfacing$axis);
            }
        }
    }

    public static enum AxisDirection {
        POSITIVE(1, "Towards positive"),
        NEGATIVE(-1, "Towards negative");

        private final int offset;
        private final String description;

        private AxisDirection(int offset, String description)
        {
            this.offset = offset;
            this.description = description;
        }

        /**
         * Get the offset for this AxisDirection. 1 for POSITIVE, -1 for NEGATIVE
         */
        public int getOffset()
        {
            return this.offset;
        }

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

    public static enum Plane implements Predicate<EnumFacing>, Iterable<EnumFacing> {
        HORIZONTAL,
        VERTICAL;

        /**
         * All EnumFacing values for this Plane
         */
        public EnumFacing[] facings()
        {
            switch (this)
            {
                case HORIZONTAL:
                    return new EnumFacing[] {EnumFacing.NORTH, EnumFacing.EAST, EnumFacing.SOUTH, EnumFacing.WEST};
                case VERTICAL:
                    return new EnumFacing[] {EnumFacing.UP, EnumFacing.DOWN};
                default:
                    throw new Error("Someone's been tampering with the universe!");
            }
        }

        /**
         * Choose a random Facing from this Plane using the given Random
         */
        public EnumFacing random(Random rand)
        {
            EnumFacing[] aenumfacing = this.facings();
            return aenumfacing[rand.nextInt(aenumfacing.length)];
        }

        public boolean apply(@Nullable EnumFacing p_apply_1_)
        {
            return p_apply_1_ != null && p_apply_1_.getAxis().getPlane() == this;
        }

        public Iterator<EnumFacing> iterator()
        {
            return Iterators.<EnumFacing>forArray(this.facings());
        }
    }
}