path: root/src/main/java/gtPlusPlus/everglades/world/TeleporterDimensionMod.java

package gtPlusPlus.everglades.world;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Random;

import net.minecraft.entity.Entity;
import net.minecraft.init.Blocks;
import net.minecraft.util.ChunkCoordinates;
import net.minecraft.util.Direction;
import net.minecraft.util.LongHashMap;
import net.minecraft.util.MathHelper;
import net.minecraft.world.ChunkCoordIntPair;
import net.minecraft.world.Teleporter;
import net.minecraft.world.WorldServer;

import gtPlusPlus.everglades.dimension.DimensionEverglades;

public class TeleporterDimensionMod extends Teleporter {

    private final WorldServer worldServerInstance;
    /**
     * A private Random() function in Teleporter
     */
    private final Random random;
    /**
     * Stores successful portal placement locations for rapid lookup.
     */
    private final LongHashMap destinationCoordinateCache = new LongHashMap();
    /**
     * A list of valid keys for the destinationCoordainteCache. These are based on the X & Z of the players initial
     * location.
     */
    @SuppressWarnings("rawtypes")
    private final List destinationCoordinateKeys = new ArrayList();

    public TeleporterDimensionMod(WorldServer par1WorldServer) {
        super(par1WorldServer);
        this.worldServerInstance = par1WorldServer;
        this.random = new Random(par1WorldServer.getSeed());
    }

    /**
     * Place an entity in a nearby portal, creating one if necessary.
     */
    @Override
    public void placeInPortal(Entity par1Entity, double par2, double par4, double par6, float par8) {
        if (this.worldServerInstance.provider.dimensionId != 1) {
            if (!this.placeInExistingPortal(par1Entity, par2, par4, par6, par8)) {
                this.makePortal(par1Entity);
                this.placeInExistingPortal(par1Entity, par2, par4, par6, par8);
            }
        } else {
            int i = MathHelper.floor_double(par1Entity.posX);
            int j = MathHelper.floor_double(par1Entity.posY) - 1;
            int k = MathHelper.floor_double(par1Entity.posZ);
            byte b0 = 1;
            byte b1 = 0;

            for (int l = -2; l <= 2; ++l) {
                for (int i1 = -2; i1 <= 2; ++i1) {
                    for (int j1 = -1; j1 < 3; ++j1) {
                        int k1 = i + i1 * b0 + l * b1;
                        int l1 = j + j1;
                        int i2 = k + i1 * b1 - l * b0;
                        boolean flag = j1 < 0;
                        this.worldServerInstance
                            .setBlock(k1, l1, i2, flag ? DimensionEverglades.blockPortalFrame : Blocks.air);
                    }
                }
            }

            par1Entity.setLocationAndAngles(i, j, k, par1Entity.rotationYaw, 0.0F);
            par1Entity.motionX = par1Entity.motionY = par1Entity.motionZ = 0.0D;
        }
    }

    /**
     * Place an entity in a nearby portal which already exists.
     */
    @Override
    public boolean placeInExistingPortal(Entity par1Entity, double par2, double par4, double par6, float par8) {
        short short1 = 128;
        double d3 = -1.0D;
        int i = 0;
        int j = 0;
        int k = 0;
        int l = MathHelper.floor_double(par1Entity.posX);
        int i1 = MathHelper.floor_double(par1Entity.posZ);
        long j1 = ChunkCoordIntPair.chunkXZ2Int(l, i1);
        boolean flag = true;
        double d7;
        int l3;

        if (this.destinationCoordinateCache.containsItem(j1)) {
            Teleporter.PortalPosition portalposition = (Teleporter.PortalPosition) this.destinationCoordinateCache
                .getValueByKey(j1);
            d3 = 0.0D;
            i = portalposition.posX;
            j = portalposition.posY;
            k = portalposition.posZ;
            portalposition.lastUpdateTime = this.worldServerInstance.getTotalWorldTime();
            flag = false;
        } else {
            for (l3 = l - short1; l3 <= l + short1; ++l3) {
                double d4 = l3 + 0.5D - par1Entity.posX;

                for (int l1 = i1 - short1; l1 <= i1 + short1; ++l1) {
                    double d5 = l1 + 0.5D - par1Entity.posZ;

                    for (int i2 = this.worldServerInstance.getActualHeight() - 1; i2 >= 0; --i2) {
                        if (this.worldServerInstance.getBlock(l3, i2, l1) == DimensionEverglades.portalBlock) {
                            while (this.worldServerInstance.getBlock(l3, i2 - 1, l1)
                                == DimensionEverglades.portalBlock) {
                                --i2;
                            }

                            d7 = i2 + 0.5D - par1Entity.posY;
                            double d8 = d4 * d4 + d7 * d7 + d5 * d5;

                            if (d3 < 0.0D || d8 < d3) {
                                d3 = d8;
                                i = l3;
                                j = i2;
                                k = l1;
                            }
                        }
                    }
                }
            }
        }

        if (d3 >= 0.0D) {
            if (flag) {
                this.destinationCoordinateCache
                    .add(j1, new Teleporter.PortalPosition(i, j, k, this.worldServerInstance.getTotalWorldTime()));
                this.destinationCoordinateKeys.add(j1);
            }

            double d11 = i + 0.5D;
            double d6 = j + 0.5D;
            d7 = k + 0.5D;
            int i4 = -1;

            if (this.worldServerInstance.getBlock(i - 1, j, k) == DimensionEverglades.portalBlock) {
                i4 = 2;
            }

            if (this.worldServerInstance.getBlock(i + 1, j, k) == DimensionEverglades.portalBlock) {
                i4 = 0;
            }

            if (this.worldServerInstance.getBlock(i, j, k - 1) == DimensionEverglades.portalBlock) {
                i4 = 3;
            }

            if (this.worldServerInstance.getBlock(i, j, k + 1) == DimensionEverglades.portalBlock) {
                i4 = 1;
            }

            int j2 = par1Entity.getTeleportDirection();

            if (i4 > -1) {
                int k2 = Direction.rotateLeft[i4];
                int l2 = Direction.offsetX[i4];
                int i3 = Direction.offsetZ[i4];
                int j3 = Direction.offsetX[k2];
                int k3 = Direction.offsetZ[k2];
                boolean flag1 = !this.worldServerInstance.isAirBlock(i + l2 + j3, j, k + i3 + k3)
                    || !this.worldServerInstance.isAirBlock(i + l2 + j3, j + 1, k + i3 + k3);
                boolean flag2 = !this.worldServerInstance.isAirBlock(i + l2, j, k + i3)
                    || !this.worldServerInstance.isAirBlock(i + l2, j + 1, k + i3);

                if (flag1 && flag2) {
                    i4 = Direction.rotateOpposite[i4];
                    k2 = Direction.rotateOpposite[k2];
                    l2 = Direction.offsetX[i4];
                    i3 = Direction.offsetZ[i4];
                    j3 = Direction.offsetX[k2];
                    k3 = Direction.offsetZ[k2];
                    l3 = i - j3;
                    d11 -= j3;
                    int k1 = k - k3;
                    d7 -= k3;
                    flag1 = !this.worldServerInstance.isAirBlock(l3 + l2 + j3, j, k1 + i3 + k3)
                        || !this.worldServerInstance.isAirBlock(l3 + l2 + j3, j + 1, k1 + i3 + k3);
                    flag2 = !this.worldServerInstance.isAirBlock(l3 + l2, j, k1 + i3)
                        || !this.worldServerInstance.isAirBlock(l3 + l2, j + 1, k1 + i3);
                }

                float f1 = 0.5F;
                float f2 = 0.5F;

                if (!flag1 && flag2) {
                    f1 = 1.0F;
                } else if (flag1 && !flag2) {
                    f1 = 0.0F;
                } else if (flag1 && flag2) {
                    f2 = 0.0F;
                }

                d11 += j3 * f1 + f2 * l2;
                d7 += k3 * f1 + f2 * i3;
                float f3 = 0.0F;
                float f4 = 0.0F;
                float f5 = 0.0F;
                float f6 = 0.0F;

                if (i4 == j2) {
                    f3 = 1.0F;
                    f4 = 1.0F;
                } else if (i4 == Direction.rotateOpposite[j2]) {
                    f3 = -1.0F;
                    f4 = -1.0F;
                } else if (i4 == Direction.rotateRight[j2]) {
                    f5 = 1.0F;
                    f6 = -1.0F;
                } else {
                    f5 = -1.0F;
                    f6 = 1.0F;
                }

                double d9 = par1Entity.motionX;
                double d10 = par1Entity.motionZ;
                par1Entity.motionX = d9 * f3 + d10 * f6;
                par1Entity.motionZ = d9 * f5 + d10 * f4;
                par1Entity.rotationYaw = par8 - j2 * 90 + i4 * 90;
            } else {
                par1Entity.motionX = par1Entity.motionY = par1Entity.motionZ = 0.0D;
            }

            par1Entity.setLocationAndAngles(d11, d6, d7, par1Entity.rotationYaw, par1Entity.rotationPitch);
            return true;
        } else {
            return false;
        }
    }

    @Override
    public boolean makePortal(Entity par1Entity) {
        byte b0 = 16;
        double d0 = -1.0D;
        int i = MathHelper.floor_double(par1Entity.posX);
        int j = MathHelper.floor_double(par1Entity.posY);
        int k = MathHelper.floor_double(par1Entity.posZ);
        int l = i;
        int i1 = j;
        int j1 = k;
        int k1 = 0;
        int l1 = this.random.nextInt(4);
        int i2;
        double d1;
        double d2;
        int k2;
        int i3;
        int k3;
        int j3;
        int i4;
        int l3;
        int k4;
        int j4;
        int i5;
        int l4;
        double d3;
        double d4;

        for (i2 = i - b0; i2 <= i + b0; ++i2) {
            d1 = i2 + 0.5D - par1Entity.posX;

            for (k2 = k - b0; k2 <= k + b0; ++k2) {
                d2 = k2 + 0.5D - par1Entity.posZ;
                label274: for (i3 = this.worldServerInstance.getActualHeight() - 1; i3 >= 0; --i3) {
                    if (this.worldServerInstance.isAirBlock(i2, i3, k2)) {
                        while (i3 > 0 && this.worldServerInstance.isAirBlock(i2, i3 - 1, k2)) {
                            --i3;
                        }

                        for (j3 = l1; j3 < l1 + 4; ++j3) {
                            k3 = j3 % 2;
                            l3 = 1 - k3;

                            if (j3 % 4 >= 2) {
                                k3 = -k3;
                                l3 = -l3;
                            }

                            for (i4 = 0; i4 < 3; ++i4) {
                                for (j4 = 0; j4 < 4; ++j4) {
                                    for (k4 = -1; k4 < 4; ++k4) {
                                        l4 = i2 + (j4 - 1) * k3 + i4 * l3;
                                        i5 = i3 + k4;
                                        int j5 = k2 + (j4 - 1) * l3 - i4 * k3;

                                        if (k4 < 0 && !this.worldServerInstance.getBlock(l4, i5, j5)
                                            .getMaterial()
                                            .isSolid() || k4 >= 0 && !this.worldServerInstance.isAirBlock(l4, i5, j5)) {
                                            continue label274;
                                        }
                                    }
                                }
                            }

                            d4 = i3 + 0.5D - par1Entity.posY;
                            d3 = d1 * d1 + d4 * d4 + d2 * d2;

                            if (d0 < 0.0D || d3 < d0) {
                                d0 = d3;
                                l = i2;
                                i1 = i3;
                                j1 = k2;
                                k1 = j3 % 4;
                            }
                        }
                    }
                }
            }
        }

        if (d0 < 0.0D) {
            for (i2 = i - b0; i2 <= i + b0; ++i2) {
                d1 = i2 + 0.5D - par1Entity.posX;

                for (k2 = k - b0; k2 <= k + b0; ++k2) {
                    d2 = k2 + 0.5D - par1Entity.posZ;
                    label222: for (i3 = this.worldServerInstance.getActualHeight() - 1; i3 >= 0; --i3) {
                        if (this.worldServerInstance.isAirBlock(i2, i3, k2)) {
                            while (i3 > 0 && this.worldServerInstance.isAirBlock(i2, i3 - 1, k2)) {
                                --i3;
                            }

                            for (j3 = l1; j3 < l1 + 2; ++j3) {
                                k3 = j3 % 2;
                                l3 = 1 - k3;

                                for (i4 = 0; i4 < 4; ++i4) {
                                    for (j4 = -1; j4 < 4; ++j4) {
                                        k4 = i2 + (i4 - 1) * k3;
                                        l4 = i3 + j4;
                                        i5 = k2 + (i4 - 1) * l3;

                                        if (j4 < 0 && !this.worldServerInstance.getBlock(k4, l4, i5)
                                            .getMaterial()
                                            .isSolid() || j4 >= 0 && !this.worldServerInstance.isAirBlock(k4, l4, i5)) {
                                            continue label222;
                                        }
                                    }
                                }

                                d4 = i3 + 0.5D - par1Entity.posY;
                                d3 = d1 * d1 + d4 * d4 + d2 * d2;

                                if (d0 < 0.0D || d3 < d0) {
                                    d0 = d3;
                                    l = i2;
                                    i1 = i3;
                                    j1 = k2;
                                    k1 = j3 % 2;
                                }
                            }
                        }
                    }
                }
            }
        }

        int k5 = l;
        int j2 = i1;
        k2 = j1;
        int l5 = k1 % 2;
        int l2 = 1 - l5;

        if (k1 % 4 >= 2) {
            l5 = -l5;
            l2 = -l2;
        }

        boolean flag;

        if (d0 < 0.0D) {
            if (i1 < 70) {
                i1 = 70;
            }

            if (i1 > this.worldServerInstance.getActualHeight() - 10) {
                i1 = this.worldServerInstance.getActualHeight() - 10;
            }

            j2 = i1;

            for (i3 = -1; i3 <= 1; ++i3) {
                for (j3 = 1; j3 < 3; ++j3) {
                    for (k3 = -1; k3 < 3; ++k3) {
                        l3 = k5 + (j3 - 1) * l5 + i3 * l2;
                        i4 = j2 + k3;
                        j4 = k2 + (j3 - 1) * l2 - i3 * l5;
                        flag = k3 < 0;
                        this.worldServerInstance
                            .setBlock(l3, i4, j4, flag ? DimensionEverglades.blockPortalFrame : Blocks.air);
                    }
                }
            }
        }

        for (i3 = 0; i3 < 4; ++i3) {
            for (j3 = 0; j3 < 4; ++j3) {
                for (k3 = -1; k3 < 4; ++k3) {
                    l3 = k5 + (j3 - 1) * l5;
                    i4 = j2 + k3;
                    j4 = k2 + (j3 - 1) * l2;
                    flag = j3 == 0 || j3 == 3 || k3 == -1 || k3 == 3;
                    this.worldServerInstance.setBlock(
                        l3,
                        i4,
                        j4,
                        flag ? DimensionEverglades.blockPortalFrame : DimensionEverglades.portalBlock,
                        0,
                        2);
                }
            }

            for (j3 = 0; j3 < 4; ++j3) {
                for (k3 = -1; k3 < 4; ++k3) {
                    l3 = k5 + (j3 - 1) * l5;
                    i4 = j2 + k3;
                    j4 = k2 + (j3 - 1) * l2;
                    this.worldServerInstance
                        .notifyBlocksOfNeighborChange(l3, i4, j4, this.worldServerInstance.getBlock(l3, i4, j4));
                }
            }
        }

        return true;
    }

    /**
     * called periodically to remove out-of-date portal locations from the cache list. Argument par1 is a
     * WorldServer.getTotalWorldTime() value.
     */
    @Override
    public void removeStalePortalLocations(long par1) {
        if (par1 % 100L == 0L) {
            @SuppressWarnings("rawtypes")
            Iterator iterator = this.destinationCoordinateKeys.iterator();
            long j = par1 - 600L;

            while (iterator.hasNext()) {
                Long olong = (Long) iterator.next();
                Teleporter.PortalPosition portalposition = (Teleporter.PortalPosition) this.destinationCoordinateCache
                    .getValueByKey(olong);

                if (portalposition == null || portalposition.lastUpdateTime < j) {
                    iterator.remove();
                    this.destinationCoordinateCache.remove(olong);
                }
            }
        }
    }

    public static class PortalPosition extends ChunkCoordinates {

        /**
         * The worldtime at which this PortalPosition was last verified
         */
        public long lastUpdateTime;

        public PortalPosition(int par2, int par3, int par4, long par5) {
            super(par2, par3, par4);
            this.lastUpdateTime = par5;
        }
    }
}