/*
 * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
 * Copyright (C) 2016-2023 ViaVersion and contributors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.viaversion.viaversion.protocols.protocol1_17to1_16_4.packets;

import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
import com.github.steveice10.opennbt.tag.builtin.IntTag;
import com.github.steveice10.opennbt.tag.builtin.ListTag;
import com.github.steveice10.opennbt.tag.builtin.Tag;
import com.viaversion.viaversion.api.data.entity.EntityTracker;
import com.viaversion.viaversion.api.minecraft.entities.Entity1_16_2Types;
import com.viaversion.viaversion.api.minecraft.entities.Entity1_17Types;
import com.viaversion.viaversion.api.minecraft.entities.EntityType;
import com.viaversion.viaversion.api.protocol.packet.ClientboundPacketType;
import com.viaversion.viaversion.api.protocol.packet.PacketWrapper;
import com.viaversion.viaversion.api.protocol.remapper.PacketRemapper;
import com.viaversion.viaversion.api.type.Type;
import com.viaversion.viaversion.api.type.types.version.Types1_16;
import com.viaversion.viaversion.api.type.types.version.Types1_17;
import com.viaversion.viaversion.protocols.protocol1_16_2to1_16_1.ClientboundPackets1_16_2;
import com.viaversion.viaversion.protocols.protocol1_17to1_16_4.ClientboundPackets1_17;
import com.viaversion.viaversion.protocols.protocol1_17to1_16_4.Protocol1_17To1_16_4;
import com.viaversion.viaversion.rewriter.EntityRewriter;

public final class EntityPackets extends EntityRewriter<ClientboundPackets1_16_2, Protocol1_17To1_16_4> {

    public EntityPackets(Protocol1_17To1_16_4 protocol) {
        super(protocol);
        mapTypes(Entity1_16_2Types.values(), Entity1_17Types.class);
    }

    @Override
    public void registerPackets() {
        registerTrackerWithData(ClientboundPackets1_16_2.SPAWN_ENTITY, Entity1_17Types.FALLING_BLOCK);
        registerTracker(ClientboundPackets1_16_2.SPAWN_MOB);
        registerTracker(ClientboundPackets1_16_2.SPAWN_PLAYER, Entity1_17Types.PLAYER);
        registerMetadataRewriter(ClientboundPackets1_16_2.ENTITY_METADATA, Types1_16.METADATA_LIST, Types1_17.METADATA_LIST);

        protocol.registerClientbound(ClientboundPackets1_16_2.DESTROY_ENTITIES, null, new PacketRemapper() {
            @Override
            public void registerMap() {
                handler(wrapper -> {
                    int[] entityIds = wrapper.read(Type.VAR_INT_ARRAY_PRIMITIVE);
                    wrapper.cancel();

                    EntityTracker entityTracker = wrapper.user().getEntityTracker(Protocol1_17To1_16_4.class);
                    for (int entityId : entityIds) {
                        entityTracker.removeEntity(entityId);

                        // Send individual remove packets
                        PacketWrapper newPacket = wrapper.create(ClientboundPackets1_17.REMOVE_ENTITY);
                        newPacket.write(Type.VAR_INT, entityId);
                        newPacket.send(Protocol1_17To1_16_4.class);
                    }
                });
            }
        });

        protocol.registerClientbound(ClientboundPackets1_16_2.JOIN_GAME, new PacketRemapper() {
            @Override
            public void registerMap() {
                map(Type.INT); // Entity ID
                map(Type.BOOLEAN); // Hardcore
                map(Type.UNSIGNED_BYTE); // Gamemode
                map(Type.BYTE); // Previous Gamemode
                map(Type.STRING_ARRAY); // World List
                map(Type.NBT); // Registry
                map(Type.NBT); // Current dimension
                handler(wrapper -> {
                    // Add new dimension fields
                    CompoundTag dimensionRegistry = wrapper.get(Type.NBT, 0).get("minecraft:dimension_type");
                    ListTag dimensions = dimensionRegistry.get("value");
                    for (Tag dimension : dimensions) {
                        CompoundTag dimensionCompound = ((CompoundTag) dimension).get("element");
                        addNewDimensionData(dimensionCompound);
                    }

                    CompoundTag currentDimensionTag = wrapper.get(Type.NBT, 1);
                    addNewDimensionData(currentDimensionTag);
                });
                handler(playerTrackerHandler());
            }
        });

        protocol.registerClientbound(ClientboundPackets1_16_2.RESPAWN, new PacketRemapper() {
            @Override
            public void registerMap() {
                handler(wrapper -> {
                    CompoundTag dimensionData = wrapper.passthrough(Type.NBT);
                    addNewDimensionData(dimensionData);
                });
            }
        });

        protocol.registerClientbound(ClientboundPackets1_16_2.ENTITY_PROPERTIES, new PacketRemapper() {
            @Override
            public void registerMap() {
                map(Type.VAR_INT); // Entity id
                handler(wrapper -> {
                    // Collection length is now a var int
                    wrapper.write(Type.VAR_INT, wrapper.read(Type.INT));
                });
            }
        });

        protocol.registerClientbound(ClientboundPackets1_16_2.PLAYER_POSITION, new PacketRemapper() {
            @Override
            public void registerMap() {
                map(Type.DOUBLE);
                map(Type.DOUBLE);
                map(Type.DOUBLE);
                map(Type.FLOAT);
                map(Type.FLOAT);
                map(Type.BYTE);
                map(Type.VAR_INT);
                handler(wrapper -> {
                    // Dismount vehicle
                    wrapper.write(Type.BOOLEAN, false);
                });
            }
        });

        protocol.registerClientbound(ClientboundPackets1_16_2.COMBAT_EVENT, null, new PacketRemapper() {
            @Override
            public void registerMap() {
                handler(wrapper -> {
                    // Combat packet actions have been split into individual packets (the content hasn't changed)
                    int type = wrapper.read(Type.VAR_INT);
                    ClientboundPacketType packetType;
                    switch (type) {
                        case 0:
                            packetType = ClientboundPackets1_17.COMBAT_ENTER;
                            break;
                        case 1:
                            packetType = ClientboundPackets1_17.COMBAT_END;
                            break;
                        case 2:
                            packetType = ClientboundPackets1_17.COMBAT_KILL;
                            break;
                        default:
                            throw new IllegalArgumentException("Invalid combat type received: " + type);
                    }

                    wrapper.setPacketType(packetType);
                });
            }
        });

        // The parent class of the other entity move packets that is never actually used has finally been removed from the id list
        protocol.cancelClientbound(ClientboundPackets1_16_2.ENTITY_MOVEMENT);
    }

    @Override
    protected void registerRewrites() {
        filter().handler((event, meta) -> {
            meta.setMetaType(Types1_17.META_TYPES.byId(meta.metaType().typeId()));

            if (meta.metaType() == Types1_17.META_TYPES.poseType) {
                int pose = meta.value();
                if (pose > 5) {
                    // Added LONG_JUMP at 6
                    meta.setValue(pose + 1);
                }
            }
        });
        registerMetaTypeHandler(Types1_17.META_TYPES.itemType, Types1_17.META_TYPES.blockStateType, Types1_17.META_TYPES.particleType);

        // Ticks frozen added with id 7
        filter().filterFamily(Entity1_17Types.ENTITY).addIndex(7);

        filter().filterFamily(Entity1_17Types.MINECART_ABSTRACT).index(11).handler((event, meta) -> {
            // Convert to new block id
            int data = (int) meta.getValue();
            meta.setValue(protocol.getMappingData().getNewBlockStateId(data));
        });

        // Attachment position removed
        filter().type(Entity1_17Types.SHULKER).removeIndex(17);
    }

    @Override
    public EntityType typeFromId(int type) {
        return Entity1_17Types.getTypeFromId(type);
    }

    private static void addNewDimensionData(CompoundTag tag) {
        tag.put("min_y", new IntTag(0));
        tag.put("height", new IntTag(256));
    }
}