/*
 * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
 *
 * 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 2 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/>.
 */

#include "AchievementCriteriaScript.h"
#include "Battlefield.h"
#include "BattlefieldMgr.h"
#include "BattlefieldWG.h"
#include "CombatAI.h"
#include "CreatureScript.h"
#include "GameGraveyard.h"
#include "GameObjectAI.h"
#include "GameObjectScript.h"
#include "GameTime.h"
#include "ObjectMgr.h"
#include "Player.h"
#include "PoolMgr.h"
#include "ScriptedCreature.h"
#include "ScriptedGossip.h"
#include "SpellScript.h"
#include "SpellScriptLoader.h"
#include "Vehicle.h"
#include "World.h"
#include <cmath>

enum eWGqueuenpctext
{
    WG_NPCQUEUE_TEXT_H_NOWAR            = 14775,
    WG_NPCQUEUE_TEXT_H_QUEUE            = 14790,
    WG_NPCQUEUE_TEXT_H_WAR              = 14777,
    WG_NPCQUEUE_TEXT_A_NOWAR            = 14782,
    WG_NPCQUEUE_TEXT_A_QUEUE            = 14791,
    WG_NPCQUEUE_TEXT_A_WAR              = 14781,
    WG_NPCQUEUE_TEXTOPTION_JOIN         = -1850507,

    WG_GOSSIP_MENU_QUEUE                = 10662,
};

enum Spells
{
    // Demolisher engineers spells
    SPELL_BUILD_SIEGE_VEHICLE_FORCE_HORDE     = 61409, //
    SPELL_BUILD_SIEGE_VEHICLE_FORCE_ALLIANCE  = 56662, // Which faction uses which ?
    SPELL_BUILD_CATAPULT_FORCE                = 56664,
    SPELL_BUILD_DEMOLISHER_FORCE              = 56659,
    SPELL_ACTIVATE_CONTROL_ARMS               = 49899,

    SPELL_VEHICLE_TELEPORT                    = 49759,

    // Spirit guide
    SPELL_CHANNEL_SPIRIT_HEAL                 = 22011,

    // RP-GG
    SPELL_RP_GG_TRIGGER_MISSILE               = 49769,

    // Teleport to fortress
    SPELL_TELEPORT_TO_FORTRESS                = 59096,
};

enum CreatureIds
{
    NPC_GOBLIN_MECHANIC                 = 30400,
    NPC_GNOMISH_ENGINEER                = 30499,

    NPC_WINTERGRASP_CONTROL_ARMS        = 27852,

    NPC_WORLD_TRIGGER_LARGE_AOI_NOT_IMMUNE_PC_NPC = 23742,
};

enum QuestIds
{
    QUEST_BONES_AND_ARROWS_HORDE_ATT              = 13199,
    QUEST_JINXING_THE_WALLS_HORDE_ATT             = 13202,
    QUEST_SLAY_THEM_ALL_HORDE_ATT                 = 13180,
    QUEST_FUELING_THE_DEMOLISHERS_HORDE_ATT       = 13200,
    QUEST_HEALING_WITH_ROSES_HORDE_ATT            = 13201,
    QUEST_DEFEND_THE_SIEGE_HORDE_ATT              = 13223,

    QUEST_BONES_AND_ARROWS_HORDE_DEF              = 13193,
    QUEST_WARDING_THE_WALLS_HORDE_DEF             = 13192,
    QUEST_SLAY_THEM_ALL_HORDE_DEF                 = 13178,
    QUEST_FUELING_THE_DEMOLISHERS_HORDE_DEF       = 13191,
    QUEST_HEALING_WITH_ROSES_HORDE_DEF            = 13194,
    QUEST_TOPPLING_THE_TOWERS_HORDE_DEF           = 13539,
    QUEST_STOP_THE_SIEGE_HORDE_DEF                = 13185,

    QUEST_BONES_AND_ARROWS_ALLIANCE_ATT           = 13196,
    QUEST_WARDING_THE_WARRIORS_ALLIANCE_ATT       = 13198,
    QUEST_NO_MERCY_FOR_THE_MERCILESS_ALLIANCE_ATT = 13179,
    QUEST_DEFEND_THE_SIEGE_ALLIANCE_ATT           = 13222,
    QUEST_A_RARE_HERB_ALLIANCE_ATT                = 13195,
    QUEST_FUELING_THE_DEMOLISHERS_ALLIANCE_ATT    = 13197,

    QUEST_BONES_AND_ARROWS_ALLIANCE_DEF           = 13154,
    QUEST_WARDING_THE_WARRIORS_ALLIANCE_DEF       = 13153,
    QUEST_NO_MERCY_FOR_THE_MERCILESS_ALLIANCE_DEF = 13177,
    QUEST_SHOUTHERN_SABOTAGE_ALLIANCE_DEF         = 13538,
    QUEST_STOP_THE_SIEGE_ALLIANCE_DEF             = 13186,
    QUEST_A_RARE_HERB_ALLIANCE_DEF                = 13156,
    QUEST_FUELING_THE_DEMOLISHERS_ALLIANCE_DEF    = 236,
};

uint8 const MAX_WINTERGRASP_VEHICLES = 4;

uint32 const vehiclesList[MAX_WINTERGRASP_VEHICLES] =
{
    NPC_WINTERGRASP_CATAPULT,
    NPC_WINTERGRASP_DEMOLISHER,
    NPC_WINTERGRASP_SIEGE_ENGINE_ALLIANCE,
    NPC_WINTERGRASP_SIEGE_ENGINE_HORDE
};

////////////////////////////////////////////////
/////// NPCs
////////////////////////////////////////////////

class npc_wg_demolisher_engineer : public CreatureScript
{
public:
    npc_wg_demolisher_engineer() : CreatureScript("npc_wg_demolisher_engineer") { }

    bool OnGossipHello(Player* player, Creature* creature) override
    {
        if (creature->IsQuestGiver())
        {
            player->PrepareQuestMenu(creature->GetGUID());
        }

        if (player->HasAura(SPELL_CORPORAL))
        {
            AddGossipItemFor(player, 9923, 0, GOSSIP_SENDER_MAIN, GOSSIP_ACTION_INFO_DEF);
        }
        else if (player->HasAura(SPELL_LIEUTENANT))
        {
            AddGossipItemFor(player, 9923, 0, GOSSIP_SENDER_MAIN, GOSSIP_ACTION_INFO_DEF);
            AddGossipItemFor(player, 9923, 1, GOSSIP_SENDER_MAIN, GOSSIP_ACTION_INFO_DEF + 1);
            AddGossipItemFor(player, 9923, 2, GOSSIP_SENDER_MAIN, GOSSIP_ACTION_INFO_DEF + 2);
        }

        SendGossipMenuFor(player, player->GetGossipTextId(creature), creature->GetGUID());
        return true;
    }

    bool OnGossipSelect(Player* player, Creature* creature, uint32 /*sender */, uint32 action) override
    {
        CloseGossipMenuFor(player);

        uint32 spellId = 0;
        switch (action - GOSSIP_ACTION_INFO_DEF)
        {
        case 0:
            spellId = SPELL_BUILD_CATAPULT_FORCE;
            break;
        case 1:
            spellId = SPELL_BUILD_DEMOLISHER_FORCE;
            break;
        case 2:
            spellId = player->GetTeamId() == TEAM_ALLIANCE ? SPELL_BUILD_SIEGE_VEHICLE_FORCE_ALLIANCE : SPELL_BUILD_SIEGE_VEHICLE_FORCE_HORDE;
            break;
        }

        if (canBuild(creature))
        {
            creature->CastSpell(player, spellId, true);
            creature->CastSpell(creature, SPELL_ACTIVATE_CONTROL_ARMS, true);
        }
        else
        {
            WorldPacket data(SMSG_CAST_FAILED, 1 + 4 + 1 + 4);
            data << uint8(0);
            data << spellId;
            data << uint8(SPELL_FAILED_CUSTOM_ERROR);
            data << uint32(SPELL_CUSTOM_ERROR_CANT_BUILD_MORE_VEHICLES);
            player->SendDirectMessage(&data);
        }
        return true;
    }

private:
    bool canBuild(Creature* creature)
    {
        Battlefield* wintergrasp = sBattlefieldMgr->GetBattlefieldByBattleId(BATTLEFIELD_BATTLEID_WG);
        if (!wintergrasp)
            return false;

        switch (creature->GetEntry())
        {
            case NPC_GOBLIN_MECHANIC:
                return (wintergrasp->GetData(BATTLEFIELD_WG_DATA_MAX_VEHICLE_H) > wintergrasp->GetData(BATTLEFIELD_WG_DATA_VEHICLE_H));
            case NPC_GNOMISH_ENGINEER:
                return (wintergrasp->GetData(BATTLEFIELD_WG_DATA_MAX_VEHICLE_A) > wintergrasp->GetData(BATTLEFIELD_WG_DATA_VEHICLE_A));
            default:
                return false;
        }
    }
};

class npc_wg_spirit_guide : public CreatureScript
{
public:
    npc_wg_spirit_guide() : CreatureScript("npc_wg_spirit_guide") { }

    bool OnGossipHello(Player* player, Creature* creature) override
    {
        if (creature->IsQuestGiver())
            player->PrepareQuestMenu(creature->GetGUID());

        Battlefield* wintergrasp = sBattlefieldMgr->GetBattlefieldByBattleId(BATTLEFIELD_BATTLEID_WG);
        if (!wintergrasp)
            return true;

        GraveyardVect graveyard = wintergrasp->GetGraveyardVector();
        for (uint8 i = 0; i < graveyard.size(); i++)
            if (graveyard[i]->GetControlTeamId() == player->GetTeamId())
                AddGossipItemFor(player, GOSSIP_ICON_CHAT, sObjectMgr->GetAcoreStringForDBCLocale(((BfGraveyardWG*)graveyard[i])->GetTextId()), GOSSIP_SENDER_MAIN, GOSSIP_ACTION_INFO_DEF + i);

        SendGossipMenuFor(player, player->GetGossipTextId(creature), creature->GetGUID());
        return true;
    }

    bool OnGossipSelect(Player* player, Creature* /*creature */, uint32 /*sender */, uint32 action) override
    {
        CloseGossipMenuFor(player);

        Battlefield* wintergrasp = sBattlefieldMgr->GetBattlefieldByBattleId(BATTLEFIELD_BATTLEID_WG);
        if (wintergrasp)
        {
            GraveyardVect gy = wintergrasp->GetGraveyardVector();
            for (uint8 i = 0; i < gy.size(); i++)
                if (action - GOSSIP_ACTION_INFO_DEF == i && gy[i]->GetControlTeamId() == player->GetTeamId())
                    if (GraveyardStruct const* safeLoc = sGraveyard->GetGraveyard(gy[i]->GetGraveyardId()))
                        player->TeleportTo(safeLoc->Map, safeLoc->x, safeLoc->y, safeLoc->z, 0);
        }
        return true;
    }

    struct npc_wg_spirit_guideAI : public ScriptedAI
    {
        npc_wg_spirit_guideAI(Creature* creature) : ScriptedAI(creature)
        {
            me->setActive(true);
        }

        void UpdateAI(uint32 /*diff*/) override
        {
            if (!me->HasUnitState(UNIT_STATE_CASTING))
                DoCast(me, SPELL_CHANNEL_SPIRIT_HEAL);
        }
    };

    CreatureAI*  GetAI(Creature* creature) const override
    {
        return new npc_wg_spirit_guideAI(creature);
    }
};

enum eWgQueue
{
    EVENT_ARCANIST_BRAEDIN_YELL     = 1,
    EVENT_MAGISTER_SURDIEL_YELL     = 2,
    EVENT_SPELL_FROST_ARMOR         = 3,

    SAY_ARCANIST_BRAEDIN            = 0,
    SAY_MAGISTER_SURDIEL            = 0,

    NPC_ARCANIST_BRAEDIN            = 32169,
    NPC_MAGISTER_SURDIEL            = 32170,

    SPELL_FROST_ARMOR               = 12544
};

class npc_wg_queue : public CreatureScript
{
public:
    npc_wg_queue() : CreatureScript("npc_wg_queue") { }

    bool OnGossipHello(Player* player, Creature* creature) override
    {
        if (!sWorld->getBoolConfig(CONFIG_MINIGOB_MANABONK))
            return false;

        if (creature->IsQuestGiver())
            player->PrepareQuestMenu(creature->GetGUID());

        Battlefield* wintergrasp = sBattlefieldMgr->GetBattlefieldByBattleId(BATTLEFIELD_BATTLEID_WG);
        if (!wintergrasp)
            return true;

        if (wintergrasp->IsWarTime())
        {
            AddGossipItemFor(player, WG_GOSSIP_MENU_QUEUE, 0, GOSSIP_SENDER_MAIN, GOSSIP_ACTION_INFO_DEF);
            SendGossipMenuFor(player, wintergrasp->GetDefenderTeam() ? WG_NPCQUEUE_TEXT_H_WAR : WG_NPCQUEUE_TEXT_A_WAR, creature->GetGUID());
        }
        else
        {
            uint32 timer = wintergrasp->GetTimer() / 1000;
            player->SendUpdateWorldState(WORLD_STATE_BATTLEFIELD_WG_CLOCK_TEXTS, GameTime::GetGameTime().count() + timer);
            if (timer < 15 * MINUTE)
            {
                AddGossipItemFor(player, WG_GOSSIP_MENU_QUEUE, 0, GOSSIP_SENDER_MAIN, GOSSIP_ACTION_INFO_DEF);
                SendGossipMenuFor(player, wintergrasp->GetDefenderTeam() ? WG_NPCQUEUE_TEXT_H_QUEUE : WG_NPCQUEUE_TEXT_A_QUEUE, creature->GetGUID());
            }
            else
                SendGossipMenuFor(player, wintergrasp->GetDefenderTeam() ? WG_NPCQUEUE_TEXT_H_NOWAR : WG_NPCQUEUE_TEXT_A_NOWAR, creature->GetGUID());
        }
        return true;
    }

    bool OnGossipSelect(Player* player, Creature* /*creature */, uint32 /*sender */, uint32 /*action*/) override
    {
        CloseGossipMenuFor(player);

        Battlefield* wintergrasp = sBattlefieldMgr->GetBattlefieldByBattleId(BATTLEFIELD_BATTLEID_WG);
        if (!wintergrasp)
            return true;

        if (wintergrasp->IsWarTime())
            wintergrasp->InvitePlayerToWar(player);
        else
        {
            uint32 timer = wintergrasp->GetTimer() / 1000;
            if (timer < 15 * MINUTE)
                wintergrasp->InvitePlayerToQueue(player);
        }
        return true;
    }

    struct npc_wg_queueAI : public ScriptedAI
    {
        npc_wg_queueAI(Creature* creature) : ScriptedAI(creature)
        {
            if (creature->GetEntry() == NPC_ARCANIST_BRAEDIN)
                events.ScheduleEvent(EVENT_ARCANIST_BRAEDIN_YELL, 0ms);
            else if (creature->GetEntry() == NPC_MAGISTER_SURDIEL)
                events.ScheduleEvent(EVENT_MAGISTER_SURDIEL_YELL, 0ms);

            events.ScheduleEvent(EVENT_SPELL_FROST_ARMOR, 0ms);
        }

        EventMap events;

        void UpdateAI(uint32 diff) override
        {
            if (sWorld->getIntConfig(CONFIG_WINTERGRASP_ENABLE) != 1)
                return;

            ScriptedAI::UpdateAI(diff);

            events.Update(diff);
            switch (events.ExecuteEvent())
            {
                case EVENT_ARCANIST_BRAEDIN_YELL:
                    if (Battlefield* wintergrasp = sBattlefieldMgr->GetBattlefieldByBattleId(BATTLEFIELD_BATTLEID_WG))
                    {
                        if (wintergrasp->IsWarTime())
                        {
                            Talk(SAY_ARCANIST_BRAEDIN);
                            events.ScheduleEvent(EVENT_ARCANIST_BRAEDIN_YELL, 4min);
                            break;
                        }
                    }
                    events.ScheduleEvent(EVENT_ARCANIST_BRAEDIN_YELL, 5s);
                    break;
                case EVENT_MAGISTER_SURDIEL_YELL:
                    if (Battlefield* wintergrasp = sBattlefieldMgr->GetBattlefieldByBattleId(BATTLEFIELD_BATTLEID_WG))
                    {
                        uint32 timer = wintergrasp->GetTimer() / 1000;
                        if (!wintergrasp->IsWarTime() && timer < 5 * MINUTE && timer > 4 * MINUTE)
                        {
                            Talk(SAY_MAGISTER_SURDIEL);
                            events.ScheduleEvent(EVENT_MAGISTER_SURDIEL_YELL, 5min);
                            break;
                        }
                    }
                    events.ScheduleEvent(EVENT_MAGISTER_SURDIEL_YELL, 5s);
                    break;
                case EVENT_SPELL_FROST_ARMOR:
                    me->CastSpell(me, SPELL_FROST_ARMOR, true);
                    events.ScheduleEvent(EVENT_SPELL_FROST_ARMOR, 15min);
                    break;
            }
        }
    };

    CreatureAI* GetAI(Creature* creature) const override
    {
        return new npc_wg_queueAI(creature);
    }
};

class npc_wg_quest_giver : public CreatureScript
{
public:
    npc_wg_quest_giver() : CreatureScript("npc_wg_quest_giver") { }

    bool OnGossipHello(Player* player, Creature* creature) override
    {
        if (creature->IsQuestGiver())
        {
            player->PrepareQuestMenu(creature->GetGUID());
        }

        if (creature->IsVendor())
        {
            AddGossipItemFor(player, GOSSIP_ICON_VENDOR, GOSSIP_TEXT_BROWSE_GOODS, GOSSIP_SENDER_MAIN, GOSSIP_ACTION_TRADE);
        }

        Battlefield* wintergrasp = sBattlefieldMgr->GetBattlefieldByBattleId(BATTLEFIELD_BATTLEID_WG);
        if (!wintergrasp)
        {
            return true;
        }

        if (creature->IsQuestGiver())
        {
            QuestRelationBounds objectQR = sObjectMgr->GetCreatureQuestRelationBounds(creature->GetEntry());
            QuestRelationBounds objectQIR = sObjectMgr->GetCreatureQuestInvolvedRelationBounds(creature->GetEntry());

            QuestMenu& qm = player->PlayerTalkClass->GetQuestMenu();
            qm.ClearMenu();

            for (QuestRelations::const_iterator i = objectQIR.first; i != objectQIR.second; ++i)
            {
                uint32 quest_id = i->second;
                QuestStatus status = player->GetQuestStatus(quest_id);
                if (status == QUEST_STATUS_COMPLETE)
                    qm.AddMenuItem(quest_id, 4);
                else if (status == QUEST_STATUS_INCOMPLETE)
                    qm.AddMenuItem(quest_id, 4);
                //else if (status == QUEST_STATUS_AVAILABLE)
                //    qm.AddMenuItem(quest_id, 2);
            }

            // xinef: add att/def doubles if this quest is spawned
            std::vector<uint32> questRelationVector;
            for (QuestRelations::const_iterator i = objectQR.first; i != objectQR.second; ++i)
            {
                uint32 questId = i->second;
                Quest const* quest = sObjectMgr->GetQuestTemplate(questId);
                if (!quest)
                    continue;

                switch (questId)
                {
                    case QUEST_BONES_AND_ARROWS_ALLIANCE_ATT:
                        if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_BONES_AND_ARROWS_ALLIANCE_DEF))
                            continue;
                        questRelationVector.push_back(QUEST_BONES_AND_ARROWS_ALLIANCE_ATT);
                        break;
                    case QUEST_WARDING_THE_WARRIORS_ALLIANCE_ATT:
                        if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_WARDING_THE_WARRIORS_ALLIANCE_DEF))
                            continue;
                        questRelationVector.push_back(QUEST_WARDING_THE_WARRIORS_ALLIANCE_ATT);
                        break;
                    case QUEST_A_RARE_HERB_ALLIANCE_ATT:
                        if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_A_RARE_HERB_ALLIANCE_DEF))
                            continue;
                        questRelationVector.push_back(QUEST_A_RARE_HERB_ALLIANCE_ATT);
                        break;
                    case QUEST_FUELING_THE_DEMOLISHERS_ALLIANCE_ATT:
                        if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_FUELING_THE_DEMOLISHERS_ALLIANCE_DEF))
                            continue;
                        questRelationVector.push_back(QUEST_FUELING_THE_DEMOLISHERS_ALLIANCE_ATT);
                        break;
                    case QUEST_BONES_AND_ARROWS_HORDE_ATT:
                        if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_BONES_AND_ARROWS_HORDE_DEF))
                            continue;
                        questRelationVector.push_back(QUEST_BONES_AND_ARROWS_HORDE_ATT);
                        break;
                    case QUEST_JINXING_THE_WALLS_HORDE_ATT:
                        if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_WARDING_THE_WALLS_HORDE_DEF))
                            continue;
                        questRelationVector.push_back(QUEST_JINXING_THE_WALLS_HORDE_ATT);
                        break;
                    case QUEST_FUELING_THE_DEMOLISHERS_HORDE_ATT:
                        if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_FUELING_THE_DEMOLISHERS_HORDE_DEF))
                            continue;
                        questRelationVector.push_back(QUEST_FUELING_THE_DEMOLISHERS_HORDE_ATT);
                        break;
                    case QUEST_HEALING_WITH_ROSES_HORDE_ATT:
                        if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_HEALING_WITH_ROSES_HORDE_DEF))
                            continue;
                        questRelationVector.push_back(QUEST_HEALING_WITH_ROSES_HORDE_ATT);
                        break;
                    default:
                        questRelationVector.push_back(questId);
                        break;
                }
            }

            for (std::vector<uint32>::const_iterator i = questRelationVector.begin(); i != questRelationVector.end(); ++i)
            {
                uint32 questId = *i;
                Quest const* quest = sObjectMgr->GetQuestTemplate(questId);
                switch (questId)
                {
                    // Horde attacker
                    case QUEST_BONES_AND_ARROWS_HORDE_ATT:
                    case QUEST_JINXING_THE_WALLS_HORDE_ATT:
                    case QUEST_SLAY_THEM_ALL_HORDE_ATT:
                    case QUEST_FUELING_THE_DEMOLISHERS_HORDE_ATT:
                    case QUEST_HEALING_WITH_ROSES_HORDE_ATT:
                    case QUEST_DEFEND_THE_SIEGE_HORDE_ATT:
                        if (wintergrasp->GetAttackerTeam() == TEAM_HORDE)
                        {
                            QuestStatus status = player->GetQuestStatus(questId);

                            if (quest->IsAutoComplete() && player->CanTakeQuest(quest, false))
                                qm.AddMenuItem(questId, 4);
                            else if (status == QUEST_STATUS_NONE && player->CanTakeQuest(quest, false))
                                qm.AddMenuItem(questId, 2);
                        }
                        break;
                    // Horde defender
                    case QUEST_BONES_AND_ARROWS_HORDE_DEF:
                    case QUEST_WARDING_THE_WALLS_HORDE_DEF:
                    case QUEST_SLAY_THEM_ALL_HORDE_DEF:
                    case QUEST_FUELING_THE_DEMOLISHERS_HORDE_DEF:
                    case QUEST_HEALING_WITH_ROSES_HORDE_DEF:
                    case QUEST_TOPPLING_THE_TOWERS_HORDE_DEF:
                    case QUEST_STOP_THE_SIEGE_HORDE_DEF:
                        if (wintergrasp->GetDefenderTeam() == TEAM_HORDE)
                        {
                            QuestStatus status = player->GetQuestStatus(questId);

                            if (quest->IsAutoComplete() && player->CanTakeQuest(quest, false))
                                qm.AddMenuItem(questId, 4);
                            else if (status == QUEST_STATUS_NONE && player->CanTakeQuest(quest, false))
                                qm.AddMenuItem(questId, 2);
                        }
                        break;
                    // Alliance attacker
                    case QUEST_BONES_AND_ARROWS_ALLIANCE_ATT:
                    case QUEST_WARDING_THE_WARRIORS_ALLIANCE_ATT:
                    case QUEST_NO_MERCY_FOR_THE_MERCILESS_ALLIANCE_ATT:
                    case QUEST_DEFEND_THE_SIEGE_ALLIANCE_ATT:
                    case QUEST_A_RARE_HERB_ALLIANCE_ATT:
                    case QUEST_FUELING_THE_DEMOLISHERS_ALLIANCE_ATT:
                        if (wintergrasp->GetAttackerTeam() == TEAM_ALLIANCE)
                        {
                            QuestStatus status = player->GetQuestStatus(questId);

                            if (quest->IsAutoComplete() && player->CanTakeQuest(quest, false))
                                qm.AddMenuItem(questId, 4);
                            else if (status == QUEST_STATUS_NONE && player->CanTakeQuest(quest, false))
                                qm.AddMenuItem(questId, 2);
                        }
                        break;
                    // Alliance defender
                    case QUEST_BONES_AND_ARROWS_ALLIANCE_DEF:
                    case QUEST_WARDING_THE_WARRIORS_ALLIANCE_DEF:
                    case QUEST_NO_MERCY_FOR_THE_MERCILESS_ALLIANCE_DEF:
                    case QUEST_SHOUTHERN_SABOTAGE_ALLIANCE_DEF:
                    case QUEST_STOP_THE_SIEGE_ALLIANCE_DEF:
                    case QUEST_A_RARE_HERB_ALLIANCE_DEF:
                    case QUEST_FUELING_THE_DEMOLISHERS_ALLIANCE_DEF:
                        if (wintergrasp->GetDefenderTeam() == TEAM_ALLIANCE)
                        {
                            QuestStatus status = player->GetQuestStatus(questId);

                            if (quest->IsAutoComplete() && player->CanTakeQuest(quest, false))
                                qm.AddMenuItem(questId, 4);
                            else if (status == QUEST_STATUS_NONE && player->CanTakeQuest(quest, false))
                                qm.AddMenuItem(questId, 2);
                        }
                        break;
                    default:
                        QuestStatus status = player->GetQuestStatus(questId);

                        if (quest->IsAutoComplete() && player->CanTakeQuest(quest, false))
                            qm.AddMenuItem(questId, 4);
                        else if (status == QUEST_STATUS_NONE && player->CanTakeQuest(quest, false))
                            qm.AddMenuItem(questId, 2);
                        break;
                }
            }
        }
        SendGossipMenuFor(player, player->GetGossipTextId(creature), creature->GetGUID());
        return true;
    }

    uint32 GetDialogStatus(Player* player, Creature* creature) override
    {
        QuestRelationBounds qr = sObjectMgr->GetCreatureQuestRelationBounds(creature->GetEntry());
        QuestRelationBounds qir = sObjectMgr->GetCreatureQuestInvolvedRelationBounds(creature->GetEntry());
        QuestGiverStatus result = DIALOG_STATUS_NONE;

        Battlefield* wintergrasp = sBattlefieldMgr->GetBattlefieldByBattleId(BATTLEFIELD_BATTLEID_WG);

        for (QuestRelations::const_iterator i = qir.first; i != qir.second; ++i)
        {
            QuestGiverStatus result2 = DIALOG_STATUS_NONE;
            uint32 questId = i->second;
            Quest const* quest = sObjectMgr->GetQuestTemplate(questId);
            if (!quest)
                continue;

            ConditionList conditions = sConditionMgr->GetConditionsForNotGroupedEntry(CONDITION_SOURCE_TYPE_QUEST_AVAILABLE, quest->GetQuestId());
            if (!sConditionMgr->IsObjectMeetToConditions(player, conditions))
                continue;

            QuestStatus status = player->GetQuestStatus(questId);
            if ((status == QUEST_STATUS_COMPLETE && !player->GetQuestRewardStatus(questId)) ||
                    (quest->IsAutoComplete() && player->CanTakeQuest(quest, false)))
            {
                if (quest->IsAutoComplete() && quest->IsRepeatable() && !quest->IsDailyOrWeekly())
                    result2 = DIALOG_STATUS_REWARD_REP;
                else
                    result2 = DIALOG_STATUS_REWARD;
            }
            else if (status == QUEST_STATUS_INCOMPLETE)
                result2 = DIALOG_STATUS_INCOMPLETE;

            if (result2 > result)
                result = result2;
        }

        for (QuestRelations::const_iterator i = qr.first; i != qr.second; ++i)
        {
            QuestGiverStatus result2 = DIALOG_STATUS_NONE;
            uint32 questId = i->second;
            Quest const* quest = sObjectMgr->GetQuestTemplate(questId);
            if (!quest)
                continue;

            ConditionList conditions = sConditionMgr->GetConditionsForNotGroupedEntry(CONDITION_SOURCE_TYPE_QUEST_AVAILABLE, quest->GetQuestId());
            if (!sConditionMgr->IsObjectMeetToConditions(player, conditions))
                continue;

            switch (questId)
            {
                case QUEST_BONES_AND_ARROWS_ALLIANCE_ATT:
                    if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_BONES_AND_ARROWS_ALLIANCE_DEF))
                        continue;
                    break;
                case QUEST_WARDING_THE_WARRIORS_ALLIANCE_ATT:
                    if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_WARDING_THE_WARRIORS_ALLIANCE_DEF))
                        continue;
                    break;
                case QUEST_A_RARE_HERB_ALLIANCE_ATT:
                    if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_A_RARE_HERB_ALLIANCE_DEF))
                        continue;
                    break;
                case QUEST_FUELING_THE_DEMOLISHERS_ALLIANCE_ATT:
                    if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_FUELING_THE_DEMOLISHERS_ALLIANCE_DEF))
                        continue;
                    break;
                case QUEST_BONES_AND_ARROWS_HORDE_ATT:
                    if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_BONES_AND_ARROWS_HORDE_DEF))
                        continue;
                    break;
                case QUEST_JINXING_THE_WALLS_HORDE_ATT:
                    if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_WARDING_THE_WALLS_HORDE_DEF))
                        continue;
                    break;
                case QUEST_FUELING_THE_DEMOLISHERS_HORDE_ATT:
                    if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_FUELING_THE_DEMOLISHERS_HORDE_DEF))
                        continue;
                    break;
                case QUEST_HEALING_WITH_ROSES_HORDE_ATT:
                    if (!sPoolMgr->IsSpawnedObject<Quest>(QUEST_HEALING_WITH_ROSES_HORDE_DEF))
                        continue;
                    break;
            }

            if (wintergrasp)
            {
                // Certain quests are only available when attacking / defending
                bool hasCorrectZoneControl = false;
                switch (questId)
                {
                    // Horde attacker
                    case QUEST_BONES_AND_ARROWS_HORDE_ATT:
                    case QUEST_JINXING_THE_WALLS_HORDE_ATT:
                    case QUEST_SLAY_THEM_ALL_HORDE_ATT:
                    case QUEST_FUELING_THE_DEMOLISHERS_HORDE_ATT:
                    case QUEST_HEALING_WITH_ROSES_HORDE_ATT:
                    case QUEST_DEFEND_THE_SIEGE_HORDE_ATT:
                        if (wintergrasp->GetAttackerTeam() == TEAM_HORDE)
                        {
                            hasCorrectZoneControl = true;
                        }
                        break;
                    // Horde defender
                    case QUEST_BONES_AND_ARROWS_HORDE_DEF:
                    case QUEST_WARDING_THE_WALLS_HORDE_DEF:
                    case QUEST_SLAY_THEM_ALL_HORDE_DEF:
                    case QUEST_FUELING_THE_DEMOLISHERS_HORDE_DEF:
                    case QUEST_HEALING_WITH_ROSES_HORDE_DEF:
                    case QUEST_TOPPLING_THE_TOWERS_HORDE_DEF:
                    case QUEST_STOP_THE_SIEGE_HORDE_DEF:
                        if (wintergrasp->GetDefenderTeam() == TEAM_HORDE)
                        {
                            hasCorrectZoneControl = true;
                        }
                        break;
                    // Alliance attacker
                    case QUEST_BONES_AND_ARROWS_ALLIANCE_ATT:
                    case QUEST_WARDING_THE_WARRIORS_ALLIANCE_ATT:
                    case QUEST_NO_MERCY_FOR_THE_MERCILESS_ALLIANCE_ATT:
                    case QUEST_DEFEND_THE_SIEGE_ALLIANCE_ATT:
                    case QUEST_A_RARE_HERB_ALLIANCE_ATT:
                    case QUEST_FUELING_THE_DEMOLISHERS_ALLIANCE_ATT:
                        if (wintergrasp->GetAttackerTeam() == TEAM_ALLIANCE)
                        {
                            hasCorrectZoneControl = true;
                        }
                        break;
                    // Alliance defender
                    case QUEST_BONES_AND_ARROWS_ALLIANCE_DEF:
                    case QUEST_WARDING_THE_WARRIORS_ALLIANCE_DEF:
                    case QUEST_NO_MERCY_FOR_THE_MERCILESS_ALLIANCE_DEF:
                    case QUEST_SHOUTHERN_SABOTAGE_ALLIANCE_DEF:
                    case QUEST_STOP_THE_SIEGE_ALLIANCE_DEF:
                    case QUEST_A_RARE_HERB_ALLIANCE_DEF:
                    case QUEST_FUELING_THE_DEMOLISHERS_ALLIANCE_DEF:
                        if (wintergrasp->GetDefenderTeam() == TEAM_ALLIANCE)
                        {
                            hasCorrectZoneControl = true;
                        }
                        break;
                    default:
                        hasCorrectZoneControl = true;
                        break;
                }

                if (!hasCorrectZoneControl)
                {
                    continue;
                }
            }

            QuestStatus status = player->GetQuestStatus(questId);
            if (status == QUEST_STATUS_NONE)
            {
                if (player->CanSeeStartQuest(quest))
                {
                    if (player->SatisfyQuestLevel(quest, false))
                    {
                        if (quest->IsAutoComplete())
                            result2 = DIALOG_STATUS_REWARD_REP;
                        else if (player->GetLevel() <= (player->GetQuestLevel(quest) + sWorld->getIntConfig(CONFIG_QUEST_LOW_LEVEL_HIDE_DIFF)))
                        {
                            if (quest->IsDaily())
                                result2 = DIALOG_STATUS_AVAILABLE_REP;
                            else
                                result2 = DIALOG_STATUS_AVAILABLE;
                        }
                        else
                            result2 = DIALOG_STATUS_LOW_LEVEL_AVAILABLE;
                    }
                    else
                        result2 = DIALOG_STATUS_UNAVAILABLE;
                }
            }

            if (result2 > result)
                result = result2;
        }

        return result;
    }

    bool OnGossipSelect(Player* player, Creature* creature, uint32 /*sender*/, uint32 action) override
    {
        ClearGossipMenuFor(player);
        switch (action)
        {
            case GOSSIP_ACTION_TRADE:
                player->GetSession()->SendListInventory(creature->GetGUID());
                break;
        }

        return true;
    }
};

class npc_wg_siege_machine : public CreatureScript
{
public:
    npc_wg_siege_machine() : CreatureScript("npc_wg_siege_machine") { }

    struct npc_wg_siege_machineAI : public VehicleAI
    {
        npc_wg_siege_machineAI(Creature* creature) : VehicleAI(creature)
        {
            checkTimer = 0;
        }

        uint32 checkTimer;

        bool CanControlVehicle(Unit* passenger)
        {
            if (passenger->HasAura(SPELL_LIEUTENANT))
                return true;

            if (me->GetEntry() == NPC_WINTERGRASP_CATAPULT && passenger->HasAura(SPELL_CORPORAL))
                return true;

            return false;
        }

        void UpdateAI(uint32 diff) override
        {
            VehicleAI::UpdateAI(diff);

            checkTimer += diff;
            if (checkTimer >= 1000)
            {
                checkTimer = 0;
                if (me->GetVehicleKit())
                    for (SeatMap::iterator itr = me->GetVehicleKit()->Seats.begin(); itr != me->GetVehicleKit()->Seats.end(); ++itr)
                        if (const VehicleSeatEntry* seatInfo = itr->second.SeatInfo)
                            if (seatInfo->m_flags & VEHICLE_SEAT_FLAG_CAN_CONTROL)
                                if (Unit* passenger = ObjectAccessor::GetUnit(*me, itr->second.Passenger.Guid))
                                    if (!CanControlVehicle(passenger))
                                    {
                                        passenger->ExitVehicle();
                                        return;
                                    }
            }
        }
    };

    CreatureAI* GetAI(Creature* creature) const override
    {
        return new npc_wg_siege_machineAI(creature);
    }
};

////////////////////////////////////////////////
/////// GOs
////////////////////////////////////////////////

class go_wg_vehicle_teleporter : public GameObjectScript
{
public:
    go_wg_vehicle_teleporter() : GameObjectScript("go_wg_vehicle_teleporter") { }

    struct go_wg_vehicle_teleporterAI : public GameObjectAI
    {
        go_wg_vehicle_teleporterAI(GameObject* gameObject) : GameObjectAI(gameObject),
            _checkTimer(0)
        {
        }

        bool IsFriendly(Unit* passenger)
        {
            return ((me->GetUInt32Value(GAMEOBJECT_FACTION) == WintergraspFaction[TEAM_HORDE] && passenger->getRaceMask() & RACEMASK_HORDE) ||
                    (me->GetUInt32Value(GAMEOBJECT_FACTION) == WintergraspFaction[TEAM_ALLIANCE] && passenger->getRaceMask() & RACEMASK_ALLIANCE));
        }

        Creature* IsValidVehicle(Creature* cVeh)
        {
            if (!cVeh->HasAura(SPELL_VEHICLE_TELEPORT))
                if (Vehicle* vehicle = cVeh->GetVehicleKit())
                    if (Unit* passenger = vehicle->GetPassenger(0))
                        if (IsFriendly(passenger))
                            if (Creature* teleportTrigger = passenger->SummonTrigger(me->GetPositionX() - 60.0f, me->GetPositionY(), me->GetPositionZ() + 1.0f, cVeh->GetOrientation(), 1000))
                                return teleportTrigger;

            return nullptr;
        }

        void UpdateAI(uint32 diff) override
        {
            _checkTimer += diff;
            if (_checkTimer >= 1000)
            {
                for (uint8 i = 0; i < MAX_WINTERGRASP_VEHICLES; i++)
                    if (Creature* vehicleCreature = me->FindNearestCreature(vehiclesList[i], 3.0f, true))
                        if (Creature* teleportTrigger = IsValidVehicle(vehicleCreature))
                            teleportTrigger->CastSpell(vehicleCreature, SPELL_VEHICLE_TELEPORT, true);

                _checkTimer = 0;
            }
        }
    private:
        uint32 _checkTimer;
    };

    GameObjectAI* GetAI(GameObject* go) const override
    {
        return new go_wg_vehicle_teleporterAI(go);
    }
};

////////////////////////////////////////////////
/////// SPELLs
////////////////////////////////////////////////

/* 56662, 61409 - Build Siege Vehicle (Force)
   56664 - Build Catapult (Force)
   56659 - Build Demolisher (Force) */
class spell_wintergrasp_force_building : public SpellScript
{
    PrepareSpellScript(spell_wintergrasp_force_building);

    bool Validate(SpellInfo const* /*spell*/) override
    {
        return ValidateSpellInfo(
            {
                SPELL_BUILD_CATAPULT_FORCE,
                SPELL_BUILD_DEMOLISHER_FORCE,
                SPELL_BUILD_SIEGE_VEHICLE_FORCE_HORDE,
                SPELL_BUILD_SIEGE_VEHICLE_FORCE_ALLIANCE
            });
    }

    void HandleScript(SpellEffIndex effIndex)
    {
        PreventHitDefaultEffect(effIndex);
        if (Unit* target = GetHitUnit())
            target->CastSpell(target, GetEffectValue(), false, nullptr, nullptr, target->GetGUID());
    }

    void Register() override
    {
        OnEffectHitTarget += SpellEffectFn(spell_wintergrasp_force_building::HandleScript, EFFECT_0, SPELL_EFFECT_SCRIPT_EFFECT);
    }
};

/* 56661, 61408 - Build Siege Engine
   56663 - Build Catapult
   56575 - Build Demolisher */
class spell_wintergrasp_create_vehicle : public SpellScript
{
    PrepareSpellScript(spell_wintergrasp_create_vehicle);

    void HandleSummon(SpellEffIndex effIndex)
    {
        PreventHitEffect(effIndex);

        if (Unit* caster = GetCaster())
        {
            Unit* originalCaster = GetOriginalCaster();
            if (!originalCaster)
            {
                return;
            }

            SummonPropertiesEntry const* properties = sSummonPropertiesStore.LookupEntry(GetSpellInfo()->Effects[effIndex].MiscValueB);
            if (!properties)
            {
                return;
            }

            uint32 entry = GetSpellInfo()->Effects[effIndex].MiscValue;
            int32 duration = GetSpellInfo()->GetDuration();
            if (TempSummon* summon = caster->GetMap()->SummonCreature(entry, *GetHitDest(), properties, duration, originalCaster, GetSpellInfo()->Id))
            {
                if (summon->IsInMap(caster))
                {
                    summon->SetCreatorGUID(originalCaster->GetGUID());
                    summon->HandleSpellClick(caster);
                }
            }
        }
    }

    void Register() override
    {
        OnEffectHit += SpellEffectFn(spell_wintergrasp_create_vehicle::HandleSummon, EFFECT_1, SPELL_EFFECT_SUMMON);
    }
};

// 49761 - Rocket-Propelled Goblin Grenade
class spell_wintergrasp_rp_gg : public SpellScript
{
    PrepareSpellScript(spell_wintergrasp_rp_gg);

    bool Validate(SpellInfo const* /*spellInfo*/) override
    {
        return ValidateSpellInfo({ SPELL_RP_GG_TRIGGER_MISSILE });
    }

    bool handled;
    bool Load() override
    {
        handled = false;
        return true;
    }

    void HandleFinish()
    {
        if (!GetExplTargetDest())
            return;

        GetCaster()->CastSpell(GetExplTargetDest()->GetPositionX(), GetExplTargetDest()->GetPositionY(), GetExplTargetDest()->GetPositionZ(), SPELL_RP_GG_TRIGGER_MISSILE, true);
    }

    void Register() override
    {
        AfterCast += SpellCastFn(spell_wintergrasp_rp_gg::HandleFinish);
    }
};

// 58622 - Teleport to Lake Wintergrasp
class spell_wintergrasp_portal : public SpellScript
{
    PrepareSpellScript(spell_wintergrasp_portal);

    bool Validate(SpellInfo const* /*spellInfo*/) override
    {
        return ValidateSpellInfo({ SPELL_TELEPORT_TO_FORTRESS });
    }

    void HandleScript(SpellEffIndex effIndex)
    {
        PreventHitDefaultEffect(effIndex);
        Player* target = GetHitPlayer();
        Battlefield* wintergrasp = sBattlefieldMgr->GetBattlefieldByBattleId(BATTLEFIELD_BATTLEID_WG);
        if (!wintergrasp || !target || target->GetLevel() < 75 || (wintergrasp->GetDefenderTeam() != target->GetTeamId()))
            return;

        target->CastSpell(target, SPELL_TELEPORT_TO_FORTRESS, true);
    }

    void Register() override
    {
        OnEffectHitTarget += SpellEffectFn(spell_wintergrasp_portal::HandleScript, EFFECT_0, SPELL_EFFECT_SCRIPT_EFFECT);
    }
};

// 36444 - Wintergrasp Water
class spell_wintergrasp_water : public SpellScript
{
    PrepareSpellScript(spell_wintergrasp_water);

    SpellCastResult CheckCast()
    {
        Unit* target = GetCaster();
        if (!target || !target->IsVehicle())
            return SPELL_FAILED_DONT_REPORT;

        return SPELL_CAST_OK;
    }

    void Register() override
    {
        OnCheckCast += SpellCheckCastFn(spell_wintergrasp_water::CheckCast);
    }
};

// 52107 - (Spell not exist in DBC)
class spell_wintergrasp_hide_small_elementals_aura : public AuraScript
{
    PrepareAuraScript(spell_wintergrasp_hide_small_elementals_aura);

    void HandlePeriodicDummy(AuraEffect const*  /*aurEff*/)
    {
        Unit* target = GetTarget();
        Battlefield* Bf = sBattlefieldMgr->GetBattlefieldToZoneId(target->GetZoneId());
        bool enable = !Bf || !Bf->IsWarTime();
        target->SetPhaseMask(enable ? 1 : 512, true);
        PreventDefaultAction();
    }

    void Register() override
    {
        OnEffectPeriodic += AuraEffectPeriodicFn(spell_wintergrasp_hide_small_elementals_aura::HandlePeriodicDummy, EFFECT_0, SPELL_AURA_PERIODIC_DUMMY);
    }
};

/* 57610, 51422 - Cannon
   50999 - Boulder
   57607 - Plague Slime */
class spell_wg_reduce_damage_by_distance : public SpellScript
{
    PrepareSpellScript(spell_wg_reduce_damage_by_distance);

    void RecalculateDamage()
    {
        if (!GetExplTargetDest() || !GetHitUnit())
            return;

        float maxDistance = GetSpellInfo()->Effects[EFFECT_0].CalcRadius(GetCaster()); // Xinef: always stored in EFFECT_0
        float distance = std::min<float>(GetHitUnit()->GetDistance(*GetExplTargetDest()), maxDistance);

        int32 damage = std::max<int32>(0, int32(GetHitDamage() - std::floor(GetHitDamage() * (distance / maxDistance))));
        SetHitDamage(damage);
    }

    void Register() override
    {
        OnHit += SpellHitFn(spell_wg_reduce_damage_by_distance::RecalculateDamage);
    }
};

////////////////////////////////////////////////
/////// ACHIEVEMENTs
////////////////////////////////////////////////

class achievement_wg_didnt_stand_a_chance : public AchievementCriteriaScript
{
public:
    achievement_wg_didnt_stand_a_chance() : AchievementCriteriaScript("achievement_wg_didnt_stand_a_chance") { }

    bool OnCheck(Player* source, Unit* target, uint32 /*criteria_id*/) override
    {
        if (!target)
            return false;

        if (Player* victim = target->ToPlayer())
        {
            if (!victim->IsMounted())
                return false;

            if (Vehicle* vehicle = source->GetVehicle())
                if (vehicle->GetVehicleInfo()->m_ID == 244) // Wintergrasp Tower Cannon
                    return true;
        }

        return false;
    }
};

class achievement_wg_vehicular_gnomeslaughter : public AchievementCriteriaScript
{
public:
    achievement_wg_vehicular_gnomeslaughter() : AchievementCriteriaScript("achievement_wg_vehicular_gnomeslaughter") { }

    bool OnCheck(Player* source, Unit* target, uint32 /*criteria_id*/) override
    {
        if (!target)
            return false;

        if (Unit* vehicle = source->GetVehicleBase())
            if (vehicle->GetEntry() == NPC_WINTERGRASP_SIEGE_ENGINE_ALLIANCE || vehicle->GetEntry() == NPC_WINTERGRASP_SIEGE_ENGINE_HORDE ||
                    vehicle->GetEntry() == NPC_WINTERGRASP_CATAPULT || vehicle->GetEntry() == NPC_WINTERGRASP_DEMOLISHER ||
                    vehicle->GetEntry() == NPC_WINTERGRASP_TOWER_CANNON)
                return true;

        return false;
    }
};

class achievement_wg_within_our_grasp : public AchievementCriteriaScript
{
public:
    achievement_wg_within_our_grasp() : AchievementCriteriaScript("achievement_wg_within_our_grasp") { }

    bool OnCheck(Player*  /*source*/, Unit*  /*target*/, uint32 /*criteria_id*/) override
    {
        Battlefield* wintergrasp = sBattlefieldMgr->GetBattlefieldByBattleId(BATTLEFIELD_BATTLEID_WG);
        if (!wintergrasp)
            return false;

        return wintergrasp->GetTimer() >= (20 * MINUTE * IN_MILLISECONDS);
    }
};

void AddSC_wintergrasp()
{
    // NPCs
    new npc_wg_queue();
    new npc_wg_spirit_guide();
    new npc_wg_demolisher_engineer();
    new npc_wg_quest_giver();
    new npc_wg_siege_machine();

    // GOs
    new go_wg_vehicle_teleporter();

    // SPELLs
    RegisterSpellScript(spell_wintergrasp_force_building);
    RegisterSpellScript(spell_wintergrasp_create_vehicle);
    RegisterSpellScript(spell_wintergrasp_rp_gg);
    RegisterSpellScript(spell_wintergrasp_portal);
    RegisterSpellScript(spell_wintergrasp_water);
    RegisterSpellScript(spell_wintergrasp_hide_small_elementals_aura);
    RegisterSpellScript(spell_wg_reduce_damage_by_distance);

    // ACHIEVEMENTs
    new achievement_wg_didnt_stand_a_chance();
    new achievement_wg_vehicular_gnomeslaughter();
    new achievement_wg_within_our_grasp();
}