/src/server/game/Spells/Spell.cpp

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/*
 * Copyright (C) 2008-2014 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
 *
 * 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 "Common.h"
#include "DatabaseEnv.h"
#include "WorldPacket.h"
#include "WorldSession.h"
#include "GridNotifiers.h"
#include "GridNotifiersImpl.h"
#include "Opcodes.h"
#include "Log.h"
#include "UpdateMask.h"
#include "World.h"
#include "ObjectMgr.h"
#include "SpellMgr.h"
#include "Player.h"
#include "Pet.h"
#include "Unit.h"
#include "Totem.h"
#include "Spell.h"
#include "DynamicObject.h"
#include "Guild.h"
#include "Group.h"
#include "UpdateData.h"
#include "MapManager.h"
#include "ObjectAccessor.h"
#include "CellImpl.h"
#include "SharedDefines.h"
#include "LootMgr.h"
#include "VMapFactory.h"
#include "Battleground.h"
#include "Util.h"
#include "TemporarySummon.h"
#include "Vehicle.h"
#include "SpellAuraEffects.h"
#include "ScriptMgr.h"
#include "ConditionMgr.h"
#include "DisableMgr.h"
#include "SpellScript.h"
#include "InstanceScript.h"
#include "SpellInfo.h"
#include "DB2Stores.h"
#include "Battlefield.h"
#include "BattlefieldMgr.h"

extern pEffect SpellEffects[TOTAL_SPELL_EFFECTS];

SpellDestination::SpellDestination()
{
    _position.Relocate(0, 0, 0, 0);
    _transportGUID.Clear();
    _transportOffset.Relocate(0, 0, 0, 0);
}

SpellDestination::SpellDestination(float x, float y, float z, float orientation, uint32 mapId)
{
    _position.Relocate(x, y, z, orientation);
    _transportGUID.Clear();
    _position.m_mapId = mapId;
    _transportOffset.Relocate(0, 0, 0, 0);
}

SpellDestination::SpellDestination(Position const& pos)
{
    _position.Relocate(pos);
    _transportGUID.Clear();
    _transportOffset.Relocate(0, 0, 0, 0);
}

SpellDestination::SpellDestination(WorldObject const& wObj)
{
    _transportGUID = wObj.GetTransGUID();
    _transportOffset.Relocate(wObj.GetTransOffsetX(), wObj.GetTransOffsetY(), wObj.GetTransOffsetZ(), wObj.GetTransOffsetO());
    _position.Relocate(wObj);
}

void SpellDestination::Relocate(Position const& pos)
{
    if (_transportGUID)
    {
        Position offset;
        _position.GetPositionOffsetTo(pos, offset);
        _transportOffset.RelocateOffset(offset);
    }
    _position.Relocate(pos);
}

void SpellDestination::RelocateOffset(Position const& offset)
{
    if (_transportGUID)
        _transportOffset.RelocateOffset(offset);

    _position.RelocateOffset(offset);
}

SpellCastTargets::SpellCastTargets() : m_elevation(0), m_speed(0), m_strTarget()
{
    m_objectTarget = NULL;
    m_itemTarget = NULL;

    m_itemTargetEntry  = 0;

    m_targetMask = 0;
}

SpellCastTargets::~SpellCastTargets() { }

void SpellCastTargets::Read(ByteBuffer& data, Unit* caster)
{
    data >> m_targetMask;

    if (m_targetMask == TARGET_FLAG_NONE)
        return;

    if (m_targetMask & (TARGET_FLAG_UNIT | TARGET_FLAG_UNIT_MINIPET | TARGET_FLAG_GAMEOBJECT | TARGET_FLAG_CORPSE_ENEMY | TARGET_FLAG_CORPSE_ALLY))
        data >> m_objectTargetGUID.ReadAsPacked();

    if (m_targetMask & (TARGET_FLAG_ITEM | TARGET_FLAG_TRADE_ITEM))
        data >> m_itemTargetGUID.ReadAsPacked();

    if (m_targetMask & TARGET_FLAG_SOURCE_LOCATION)
    {
        data >> m_src._transportGUID.ReadAsPacked();
        if (m_src._transportGUID)
            data >> m_src._transportOffset.PositionXYZStream();
        else
            data >> m_src._position.PositionXYZStream();
    }
    else
    {
        m_src._transportGUID = caster->GetTransGUID();
        if (m_src._transportGUID)
            m_src._transportOffset.Relocate(caster->GetTransOffsetX(), caster->GetTransOffsetY(), caster->GetTransOffsetZ(), caster->GetTransOffsetO());
        else
            m_src._position.Relocate(caster);
    }

    if (m_targetMask & TARGET_FLAG_DEST_LOCATION)
    {
        data >> m_dst._transportGUID.ReadAsPacked();
        if (m_dst._transportGUID)
            data >> m_dst._transportOffset.PositionXYZStream();
        else
            data >> m_dst._position.PositionXYZStream();
    }
    else
    {
        m_dst._transportGUID = caster->GetTransGUID();
        if (m_dst._transportGUID)
            m_dst._transportOffset.Relocate(caster->GetTransOffsetX(), caster->GetTransOffsetY(), caster->GetTransOffsetZ(), caster->GetTransOffsetO());
        else
            m_dst._position.Relocate(caster);
    }

    if (m_targetMask & TARGET_FLAG_STRING)
        data >> m_strTarget;

    Update(caster);
}

void SpellCastTargets::Write(ByteBuffer& data)
{
    data << uint32(m_targetMask);

    if (m_targetMask & (TARGET_FLAG_UNIT | TARGET_FLAG_CORPSE_ALLY | TARGET_FLAG_GAMEOBJECT | TARGET_FLAG_CORPSE_ENEMY | TARGET_FLAG_UNIT_MINIPET))
        data << m_objectTargetGUID.WriteAsPacked();

    if (m_targetMask & (TARGET_FLAG_ITEM | TARGET_FLAG_TRADE_ITEM))
    {
        if (m_itemTarget)
            data << m_itemTarget->GetPackGUID();
        else
            data << uint8(0);
    }

    if (m_targetMask & TARGET_FLAG_SOURCE_LOCATION)
    {
        data << m_src._transportGUID.WriteAsPacked(); // relative position guid here - transport for example
        if (m_src._transportGUID)
            data << m_src._transportOffset.PositionXYZStream();
        else
            data << m_src._position.PositionXYZStream();
    }

    if (m_targetMask & TARGET_FLAG_DEST_LOCATION)
    {
        data << m_dst._transportGUID.WriteAsPacked(); // relative position guid here - transport for example
        if (m_dst._transportGUID)
            data << m_dst._transportOffset.PositionXYZStream();
        else
            data << m_dst._position.PositionXYZStream();
    }

    if (m_targetMask & TARGET_FLAG_STRING)
        data << m_strTarget;
}

ObjectGuid SpellCastTargets::GetOrigUnitTargetGUID() const
{
    switch (m_origObjectTargetGUID.GetHigh())
    {
        case HIGHGUID_PLAYER:
        case HIGHGUID_VEHICLE:
        case HIGHGUID_UNIT:
        case HIGHGUID_PET:
            return m_origObjectTargetGUID;
        default:
            return ObjectGuid();
    }
}

void SpellCastTargets::SetOrigUnitTarget(Unit* target)
{
    if (!target)
        return;

    m_origObjectTargetGUID = target->GetGUID();
}

ObjectGuid SpellCastTargets::GetUnitTargetGUID() const
{
    if (m_objectTargetGUID.IsUnit())
        return m_objectTargetGUID;

    return ObjectGuid::Empty;
}

Unit* SpellCastTargets::GetUnitTarget() const
{
    if (m_objectTarget)
        return m_objectTarget->ToUnit();

    return NULL;
}

void SpellCastTargets::SetUnitTarget(Unit* target)
{
    if (!target)
        return;

    m_objectTarget = target;
    m_objectTargetGUID = target->GetGUID();
    m_targetMask |= TARGET_FLAG_UNIT;
}

ObjectGuid SpellCastTargets::GetGOTargetGUID() const
{
    if (m_objectTargetGUID.IsAnyTypeGameObject())
        return m_objectTargetGUID;

    return ObjectGuid::Empty;
}

GameObject* SpellCastTargets::GetGOTarget() const
{
    if (m_objectTarget)
        return m_objectTarget->ToGameObject();

    return NULL;
}

void SpellCastTargets::SetGOTarget(GameObject* target)
{
    if (!target)
        return;

    m_objectTarget = target;
    m_objectTargetGUID = target->GetGUID();
    m_targetMask |= TARGET_FLAG_GAMEOBJECT;
}

ObjectGuid SpellCastTargets::GetCorpseTargetGUID() const
{
    if (m_objectTargetGUID.IsCorpse())
        return m_objectTargetGUID;

    return ObjectGuid::Empty;
}

Corpse* SpellCastTargets::GetCorpseTarget() const
{
    if (m_objectTarget)
        return m_objectTarget->ToCorpse();

    return NULL;
}

WorldObject* SpellCastTargets::GetObjectTarget() const
{
    return m_objectTarget;
}

ObjectGuid SpellCastTargets::GetObjectTargetGUID() const
{
    return m_objectTargetGUID;
}

void SpellCastTargets::RemoveObjectTarget()
{
    m_objectTarget = NULL;
    m_objectTargetGUID.Clear();
    m_targetMask &= ~(TARGET_FLAG_UNIT_MASK | TARGET_FLAG_CORPSE_MASK | TARGET_FLAG_GAMEOBJECT_MASK);
}

void SpellCastTargets::SetItemTarget(Item* item)
{
    if (!item)
        return;

    m_itemTarget = item;
    m_itemTargetGUID = item->GetGUID();
    m_itemTargetEntry = item->GetEntry();
    m_targetMask |= TARGET_FLAG_ITEM;
}

void SpellCastTargets::SetTradeItemTarget(Player* caster)
{
    m_itemTargetGUID.Set(uint64(TRADE_SLOT_NONTRADED));
    m_itemTargetEntry = 0;
    m_targetMask |= TARGET_FLAG_TRADE_ITEM;

    Update(caster);
}

void SpellCastTargets::UpdateTradeSlotItem()
{
    if (m_itemTarget && (m_targetMask & TARGET_FLAG_TRADE_ITEM))
    {
        m_itemTargetGUID = m_itemTarget->GetGUID();
        m_itemTargetEntry = m_itemTarget->GetEntry();
    }
}

SpellDestination const* SpellCastTargets::GetSrc() const
{
    return &m_src;
}

Position const* SpellCastTargets::GetSrcPos() const
{
    return &m_src._position;
}

void SpellCastTargets::SetSrc(float x, float y, float z)
{
    m_src = SpellDestination(x, y, z);
    m_targetMask |= TARGET_FLAG_SOURCE_LOCATION;
}

void SpellCastTargets::SetSrc(Position const& pos)
{
    m_src = SpellDestination(pos);
    m_targetMask |= TARGET_FLAG_SOURCE_LOCATION;
}

void SpellCastTargets::SetSrc(WorldObject const& wObj)
{
    m_src = SpellDestination(wObj);
    m_targetMask |= TARGET_FLAG_SOURCE_LOCATION;
}

void SpellCastTargets::ModSrc(Position const& pos)
{
    ASSERT(m_targetMask & TARGET_FLAG_SOURCE_LOCATION);
    m_src.Relocate(pos);
}

void SpellCastTargets::RemoveSrc()
{
    m_targetMask &= ~(TARGET_FLAG_SOURCE_LOCATION);
}

SpellDestination const* SpellCastTargets::GetDst() const
{
    return &m_dst;
}

WorldLocation const* SpellCastTargets::GetDstPos() const
{
    return &m_dst._position;
}

void SpellCastTargets::SetDst(float x, float y, float z, float orientation, uint32 mapId)
{
    m_dst = SpellDestination(x, y, z, orientation, mapId);
    m_targetMask |= TARGET_FLAG_DEST_LOCATION;
}

void SpellCastTargets::SetDst(Position const& pos)
{
    m_dst = SpellDestination(pos);
    m_targetMask |= TARGET_FLAG_DEST_LOCATION;
}

void SpellCastTargets::SetDst(WorldObject const& wObj)
{
    m_dst = SpellDestination(wObj);
    m_targetMask |= TARGET_FLAG_DEST_LOCATION;
}

void SpellCastTargets::SetDst(SpellDestination const& spellDest)
{
    m_dst = spellDest;
    m_targetMask |= TARGET_FLAG_DEST_LOCATION;
}

void SpellCastTargets::SetDst(SpellCastTargets const& spellTargets)
{
    m_dst = spellTargets.m_dst;
    m_targetMask |= TARGET_FLAG_DEST_LOCATION;
}

void SpellCastTargets::ModDst(Position const& pos)
{
    ASSERT(m_targetMask & TARGET_FLAG_DEST_LOCATION);
    m_dst.Relocate(pos);
}

void SpellCastTargets::ModDst(SpellDestination const& spellDest)
{
    ASSERT(m_targetMask & TARGET_FLAG_DEST_LOCATION);
    m_dst = spellDest;
}

void SpellCastTargets::RemoveDst()
{
    m_targetMask &= ~(TARGET_FLAG_DEST_LOCATION);
}

void SpellCastTargets::Update(Unit* caster)
{
    m_objectTarget = m_objectTargetGUID ? ((m_objectTargetGUID == caster->GetGUID()) ? caster : ObjectAccessor::GetWorldObject(*caster, m_objectTargetGUID)) : NULL;

    m_itemTarget = NULL;
    if (caster->GetTypeId() == TYPEID_PLAYER)
    {
        Player* player = caster->ToPlayer();
        if (m_targetMask & TARGET_FLAG_ITEM)
            m_itemTarget = player->GetItemByGuid(m_itemTargetGUID);
        else if (m_targetMask & TARGET_FLAG_TRADE_ITEM)
            if (m_itemTargetGUID.GetRawValue() == TRADE_SLOT_NONTRADED) // here it is not guid but slot. Also prevents hacking slots
                if (TradeData* pTrade = player->GetTradeData())
                    m_itemTarget = pTrade->GetTraderData()->GetItem(TRADE_SLOT_NONTRADED);

        if (m_itemTarget)
            m_itemTargetEntry = m_itemTarget->GetEntry();
    }

    // update positions by transport move
    if (HasSrc() && m_src._transportGUID)
    {
        if (WorldObject* transport = ObjectAccessor::GetWorldObject(*caster, m_src._transportGUID))
        {
            m_src._position.Relocate(transport);
            m_src._position.RelocateOffset(m_src._transportOffset);
        }
    }

    if (HasDst() && m_dst._transportGUID)
    {
        if (WorldObject* transport = ObjectAccessor::GetWorldObject(*caster, m_dst._transportGUID))
        {
            m_dst._position.Relocate(transport);
            m_dst._position.RelocateOffset(m_dst._transportOffset);
        }
    }
}

void SpellCastTargets::OutDebug() const
{
    if (!m_targetMask)
        TC_LOG_INFO("spells", "No targets");

    TC_LOG_INFO("spells", "target mask: %u", m_targetMask);
    if (m_targetMask & (TARGET_FLAG_UNIT_MASK | TARGET_FLAG_CORPSE_MASK | TARGET_FLAG_GAMEOBJECT_MASK))
        TC_LOG_INFO("spells", "Object target: %s", m_objectTargetGUID.ToString().c_str());
    if (m_targetMask & TARGET_FLAG_ITEM)
        TC_LOG_INFO("spells", "Item target: %s", m_itemTargetGUID.ToString().c_str());
    if (m_targetMask & TARGET_FLAG_TRADE_ITEM)
        TC_LOG_INFO("spells", "Trade item target: %s", m_itemTargetGUID.ToString().c_str());
    if (m_targetMask & TARGET_FLAG_SOURCE_LOCATION)
        TC_LOG_INFO("spells", "Source location: transport guid:%s trans offset: %s position: %s", m_src._transportGUID.ToString().c_str(), m_src._transportOffset.ToString().c_str(), m_src._position.ToString().c_str());
    if (m_targetMask & TARGET_FLAG_DEST_LOCATION)
        TC_LOG_INFO("spells", "Destination location: transport guid:%s trans offset: %s position: %s", m_dst._transportGUID.ToString().c_str(), m_dst._transportOffset.ToString().c_str(), m_dst._position.ToString().c_str());
    if (m_targetMask & TARGET_FLAG_STRING)
        TC_LOG_INFO("spells", "String: %s", m_strTarget.c_str());
    TC_LOG_INFO("spells", "speed: %f", m_speed);
    TC_LOG_INFO("spells", "elevation: %f", m_elevation);
}

SpellValue::SpellValue(SpellInfo const* proto)
{
    for (uint32 i = 0; i < MAX_SPELL_EFFECTS; ++i)
        EffectBasePoints[i] = proto->Effects[i].BasePoints;
    MaxAffectedTargets = proto->MaxAffectedTargets;
    RadiusMod = 1.0f;
    AuraStackAmount = 1;
}

Spell::Spell(Unit* caster, SpellInfo const* info, TriggerCastFlags triggerFlags, ObjectGuid originalCasterGUID, bool skipCheck) :
m_spellInfo(sSpellMgr->GetSpellForDifficultyFromSpell(info, caster)),
m_caster((info->AttributesEx6 & SPELL_ATTR6_CAST_BY_CHARMER && caster->GetCharmerOrOwner()) ? caster->GetCharmerOrOwner() : caster)
, m_spellValue(new SpellValue(m_spellInfo)), m_preGeneratedPath(PathGenerator(m_caster))
{
    m_customError = SPELL_CUSTOM_ERROR_NONE;
    m_skipCheck = skipCheck;
    m_selfContainer = NULL;
    m_referencedFromCurrentSpell = false;
    m_executedCurrently = false;
    m_needComboPoints = m_spellInfo->NeedsComboPoints();
    m_comboPointGain = 0;
    m_delayStart = 0;
    m_delayAtDamageCount = 0;

    m_applyMultiplierMask = 0;
    m_auraScaleMask = 0;
    memset(m_damageMultipliers, 0, sizeof(m_damageMultipliers));

    // Get data for type of attack
    switch (m_spellInfo->DmgClass)
    {
        case SPELL_DAMAGE_CLASS_MELEE:
            if (m_spellInfo->AttributesEx3 & SPELL_ATTR3_REQ_OFFHAND)
                m_attackType = OFF_ATTACK;
            else
                m_attackType = BASE_ATTACK;
            break;
        case SPELL_DAMAGE_CLASS_RANGED:
            m_attackType = m_spellInfo->IsRangedWeaponSpell() ? RANGED_ATTACK : BASE_ATTACK;
            break;
        default:
                                                            // Wands
            if (m_spellInfo->AttributesEx2 & SPELL_ATTR2_AUTOREPEAT_FLAG)
                m_attackType = RANGED_ATTACK;
            else
                m_attackType = BASE_ATTACK;
            break;
    }

    m_spellSchoolMask = info->GetSchoolMask();           // Can be override for some spell (wand shoot for example)

    if (m_attackType == RANGED_ATTACK)
        // wand case
        if ((m_caster->getClassMask() & CLASSMASK_WAND_USERS) != 0 && m_caster->GetTypeId() == TYPEID_PLAYER)
            if (Item* pItem = m_caster->ToPlayer()->GetWeaponForAttack(RANGED_ATTACK))
                m_spellSchoolMask = SpellSchoolMask(1 << pItem->GetTemplate()->DamageType);

    if (originalCasterGUID)
        m_originalCasterGUID = originalCasterGUID;
    else
        m_originalCasterGUID = m_caster->GetGUID();

    if (m_originalCasterGUID == m_caster->GetGUID())
        m_originalCaster = m_caster;
    else
    {
        m_originalCaster = ObjectAccessor::GetUnit(*m_caster, m_originalCasterGUID);
        if (m_originalCaster && !m_originalCaster->IsInWorld())
            m_originalCaster = NULL;
    }

    m_spellState = SPELL_STATE_NULL;
    _triggeredCastFlags = triggerFlags;
    if (info->AttributesEx4 & SPELL_ATTR4_TRIGGERED)
        _triggeredCastFlags = TriggerCastFlags(TRIGGERED_FULL_MASK & ~TRIGGERED_IGNORE_EQUIPPED_ITEM_REQUIREMENT);

    m_CastItem = NULL;
    m_castItemGUID.Clear();
    m_castItemEntry = 0;

    unitTarget = NULL;
    itemTarget = NULL;
    gameObjTarget = NULL;
    destTarget = NULL;
    damage = 0;
    effectHandleMode = SPELL_EFFECT_HANDLE_LAUNCH;
    m_diminishLevel = DIMINISHING_LEVEL_1;
    m_diminishGroup = DIMINISHING_NONE;
    m_damage = 0;
    m_healing = 0;
    m_procAttacker = 0;
    m_procVictim = 0;
    m_procEx = 0;
    focusObject = NULL;
    m_cast_count = 0;
    m_glyphIndex = 0;
    m_preCastSpell = 0;
    m_triggeredByAuraSpell  = NULL;
    m_spellAura = NULL;

    //Auto Shot & Shoot (wand)
    m_autoRepeat = m_spellInfo->IsAutoRepeatRangedSpell();

    m_runesState = 0;
    m_powerCost = 0;                                        // setup to correct value in Spell::prepare, must not be used before.
    m_casttime = 0;                                         // setup to correct value in Spell::prepare, must not be used before.
    m_timer = 0;                                            // will set to castime in prepare
    m_channeledDuration = 0;                                // will be setup in Spell::handle_immediate
    m_immediateHandled = false;

    m_channelTargetEffectMask = 0;

    // Determine if spell can be reflected back to the caster
    // Patch 1.2 notes: Spell Reflection no longer reflects abilities
    m_canReflect = m_spellInfo->DmgClass == SPELL_DAMAGE_CLASS_MAGIC && !(m_spellInfo->Attributes & SPELL_ATTR0_ABILITY)
        && !(m_spellInfo->AttributesEx & SPELL_ATTR1_CANT_BE_REFLECTED) && !(m_spellInfo->Attributes & SPELL_ATTR0_UNAFFECTED_BY_INVULNERABILITY)
        && !m_spellInfo->IsPassive() && !m_spellInfo->IsPositive();

    CleanupTargetList();
    memset(m_effectExecuteData, 0, MAX_SPELL_EFFECTS * sizeof(ByteBuffer*));

    for (uint8 i = 0; i < MAX_SPELL_EFFECTS; ++i)
        m_destTargets[i] = SpellDestination(*m_caster);
}

Spell::~Spell()
{
    // unload scripts
    while (!m_loadedScripts.empty())
    {
        std::list<SpellScript*>::iterator itr = m_loadedScripts.begin();
        (*itr)->_Unload();
        delete (*itr);
        m_loadedScripts.erase(itr);
    }

    if (m_referencedFromCurrentSpell && m_selfContainer && *m_selfContainer == this)
    {
        // Clean the reference to avoid later crash.
        // If this error is repeating, we may have to add an ASSERT to better track down how we get into this case.
        TC_LOG_ERROR("spells", "SPELL: deleting spell for spell ID %u. However, spell still referenced.", m_spellInfo->Id);
        *m_selfContainer = NULL;
    }

    if (m_caster && m_caster->GetTypeId() == TYPEID_PLAYER)
        ASSERT(m_caster->ToPlayer()->m_spellModTakingSpell != this);

    delete m_spellValue;

    CheckEffectExecuteData();
}

void Spell::InitExplicitTargets(SpellCastTargets const& targets)
{
    m_targets = targets;
    m_targets.SetOrigUnitTarget(m_targets.GetUnitTarget());
    // this function tries to correct spell explicit targets for spell
    // client doesn't send explicit targets correctly sometimes - we need to fix such spells serverside
    // this also makes sure that we correctly send explicit targets to client (removes redundant data)
    uint32 neededTargets = m_spellInfo->GetExplicitTargetMask();

    if (WorldObject* target = m_targets.GetObjectTarget())
    {
        // check if object target is valid with needed target flags
        // for unit case allow corpse target mask because player with not released corpse is a unit target
        if ((target->ToUnit() && !(neededTargets & (TARGET_FLAG_UNIT_MASK | TARGET_FLAG_CORPSE_MASK)))
            || (target->ToGameObject() && !(neededTargets & TARGET_FLAG_GAMEOBJECT_MASK))
            || (target->ToCorpse() && !(neededTargets & TARGET_FLAG_CORPSE_MASK)))
            m_targets.RemoveObjectTarget();
    }
    else
    {
        // try to select correct unit target if not provided by client or by serverside cast
        if (neededTargets & (TARGET_FLAG_UNIT_MASK))
        {
            Unit* unit = NULL;
            // try to use player selection as a target
            if (Player* playerCaster = m_caster->ToPlayer())
            {
                // selection has to be found and to be valid target for the spell
                if (Unit* selectedUnit = ObjectAccessor::GetUnit(*m_caster, playerCaster->GetTarget()))
                    if (m_spellInfo->CheckExplicitTarget(m_caster, selectedUnit) == SPELL_CAST_OK)
                        unit = selectedUnit;
            }
            // try to use attacked unit as a target
            else if ((m_caster->GetTypeId() == TYPEID_UNIT) && neededTargets & (TARGET_FLAG_UNIT_ENEMY | TARGET_FLAG_UNIT))
                unit = m_caster->GetVictim();

            // didn't find anything - let's use self as target
            if (!unit && neededTargets & (TARGET_FLAG_UNIT_RAID | TARGET_FLAG_UNIT_PARTY | TARGET_FLAG_UNIT_ALLY))
                unit = m_caster;

            m_targets.SetUnitTarget(unit);
        }
    }

    // check if spell needs dst target
    if (neededTargets & TARGET_FLAG_DEST_LOCATION)
    {
        // and target isn't set
        if (!m_targets.HasDst())
        {
            // try to use unit target if provided
            if (WorldObject* target = targets.GetObjectTarget())
                m_targets.SetDst(*target);
            // or use self if not available
            else
                m_targets.SetDst(*m_caster);
        }
    }
    else
        m_targets.RemoveDst();

    if (neededTargets & TARGET_FLAG_SOURCE_LOCATION)
    {
        if (!targets.HasSrc())
            m_targets.SetSrc(*m_caster);
    }
    else
        m_targets.RemoveSrc();
}

void Spell::SelectExplicitTargets()
{
    // here go all explicit target changes made to explicit targets after spell prepare phase is finished
    if (Unit* target = m_targets.GetUnitTarget())
    {
        // check for explicit target redirection, for Grounding Totem for example
        if (m_spellInfo->GetExplicitTargetMask() & TARGET_FLAG_UNIT_ENEMY
            || (m_spellInfo->GetExplicitTargetMask() & TARGET_FLAG_UNIT && !m_spellInfo->IsPositive()))
        {
            Unit* redirect;
            switch (m_spellInfo->DmgClass)
            {
                case SPELL_DAMAGE_CLASS_MAGIC:
                    redirect = m_caster->GetMagicHitRedirectTarget(target, m_spellInfo);
                    break;
                case SPELL_DAMAGE_CLASS_MELEE:
                case SPELL_DAMAGE_CLASS_RANGED:
                    redirect = m_caster->GetMeleeHitRedirectTarget(target, m_spellInfo);
                    break;
                default:
                    redirect = NULL;
                    break;
            }
            if (redirect && (redirect != target))
                m_targets.SetUnitTarget(redirect);
        }
    }
}

void Spell::SelectSpellTargets()
{
    // select targets for cast phase
    SelectExplicitTargets();

    uint32 processedAreaEffectsMask = 0;
    for (uint32 i = 0; i < MAX_SPELL_EFFECTS; ++i)
    {
        // not call for empty effect.
        // Also some spells use not used effect targets for store targets for dummy effect in triggered spells
        if (!m_spellInfo->Effects[i].IsEffect())
            continue;

        // set expected type of implicit targets to be sent to client
        uint32 implicitTargetMask = GetTargetFlagMask(m_spellInfo->Effects[i].TargetA.GetObjectType()) | GetTargetFlagMask(m_spellInfo->Effects[i].TargetB.GetObjectType());
        if (implicitTargetMask & TARGET_FLAG_UNIT)
            m_targets.SetTargetFlag(TARGET_FLAG_UNIT);
        if (implicitTargetMask & (TARGET_FLAG_GAMEOBJECT | TARGET_FLAG_GAMEOBJECT_ITEM))
            m_targets.SetTargetFlag(TARGET_FLAG_GAMEOBJECT);

        SelectEffectImplicitTargets(SpellEffIndex(i), m_spellInfo->Effects[i].TargetA, processedAreaEffectsMask);
        SelectEffectImplicitTargets(SpellEffIndex(i), m_spellInfo->Effects[i].TargetB, processedAreaEffectsMask);

        // Select targets of effect based on effect type
        // those are used when no valid target could be added for spell effect based on spell target type
        // some spell effects use explicit target as a default target added to target map (like SPELL_EFFECT_LEARN_SPELL)
        // some spell effects add target to target map only when target type specified (like SPELL_EFFECT_WEAPON)
        // some spell effects don't add anything to target map (confirmed with sniffs) (like SPELL_EFFECT_DESTROY_ALL_TOTEMS)
        SelectEffectTypeImplicitTargets(i);

        if (m_targets.HasDst())
            AddDestTarget(*m_targets.GetDst(), i);

        if (m_spellInfo->IsChanneled())
        {
            uint8 mask = (1 << i);
            for (std::list<TargetInfo>::iterator ihit = m_UniqueTargetInfo.begin(); ihit != m_UniqueTargetInfo.end(); ++ihit)
            {
                if (ihit->effectMask & mask)
                {
                    m_channelTargetEffectMask |= mask;
                    break;
                }
            }
        }
        else if (m_auraScaleMask)
        {
            bool checkLvl = !m_UniqueTargetInfo.empty();
            for (std::list<TargetInfo>::iterator ihit = m_UniqueTargetInfo.begin(); ihit != m_UniqueTargetInfo.end();)
            {
                // remove targets which did not pass min level check
                if (m_auraScaleMask && ihit->effectMask == m_auraScaleMask)
                {
                    // Do not check for selfcast
                    if (!ihit->scaleAura && ihit->targetGUID != m_caster->GetGUID())
                    {
                         m_UniqueTargetInfo.erase(ihit++);
                         continue;
                    }
                }
                ++ihit;
            }
            if (checkLvl && m_UniqueTargetInfo.empty())
            {
                SendCastResult(SPELL_FAILED_LOWLEVEL);
                finish(false);
            }
        }
    }

    if (m_targets.HasDst())
    {
        if (m_targets.HasTraj())
        {
            float speed = m_targets.GetSpeedXY();
            if (speed > 0.0f)
                m_delayMoment = uint64(std::floor(m_targets.GetDist2d() / speed * 1000.0f));
        }
        else if (m_spellInfo->Speed > 0.0f)
        {
            float dist = m_caster->GetDistance(*m_targets.GetDstPos());
            if (!(m_spellInfo->AttributesEx9 & SPELL_ATTR9_SPECIAL_DELAY_CALCULATION))
                m_delayMoment = uint64(std::floor(dist / m_spellInfo->Speed * 1000.0f));
            else
                m_delayMoment = uint64(m_spellInfo->Speed * 1000.0f);
        }
    }
}

void Spell::SelectEffectImplicitTargets(SpellEffIndex effIndex, SpellImplicitTargetInfo const& targetType, uint32& processedEffectMask)
{
    if (!targetType.GetTarget())
        return;

    uint32 effectMask = 1 << effIndex;
    // set the same target list for all effects
    // some spells appear to need this, however this requires more research
    switch (targetType.GetSelectionCategory())
    {
        case TARGET_SELECT_CATEGORY_NEARBY:
        case TARGET_SELECT_CATEGORY_CONE:
        case TARGET_SELECT_CATEGORY_AREA:
            // targets for effect already selected
            if (effectMask & processedEffectMask)
                return;
            // choose which targets we can select at once
            for (uint32 j = effIndex + 1; j < MAX_SPELL_EFFECTS; ++j)
            {
                SpellEffectInfo const* effects = GetSpellInfo()->Effects;
                if (effects[j].IsEffect() &&
                    effects[effIndex].TargetA.GetTarget() == effects[j].TargetA.GetTarget() &&
                    effects[effIndex].TargetB.GetTarget() == effects[j].TargetB.GetTarget() &&
                    effects[effIndex].ImplicitTargetConditions == effects[j].ImplicitTargetConditions &&
                    effects[effIndex].CalcRadius(m_caster) == effects[j].CalcRadius(m_caster) &&
                    CheckScriptEffectImplicitTargets(effIndex, j))
                {
                    effectMask |= 1 << j;
                }
            }
            processedEffectMask |= effectMask;
            break;
        default:
            break;
    }

    switch (targetType.GetSelectionCategory())
    {
        case TARGET_SELECT_CATEGORY_CHANNEL:
            SelectImplicitChannelTargets(effIndex, targetType);
            break;
        case TARGET_SELECT_CATEGORY_NEARBY:
            SelectImplicitNearbyTargets(effIndex, targetType, effectMask);
            break;
        case TARGET_SELECT_CATEGORY_CONE:
            SelectImplicitConeTargets(effIndex, targetType, effectMask);
            break;
        case TARGET_SELECT_CATEGORY_AREA:
            SelectImplicitAreaTargets(effIndex, targetType, effectMask);
            break;
        case TARGET_SELECT_CATEGORY_DEFAULT:
            switch (targetType.GetObjectType())
            {
                case TARGET_OBJECT_TYPE_SRC:
                    switch (targetType.GetReferenceType())
                    {
                        case TARGET_REFERENCE_TYPE_CASTER:
                            m_targets.SetSrc(*m_caster);
                            break;
                        default:
                            ASSERT(false && "Spell::SelectEffectImplicitTargets: received not implemented select target reference type for TARGET_TYPE_OBJECT_SRC");
                            break;
                    }
                    break;
                case TARGET_OBJECT_TYPE_DEST:
                     switch (targetType.GetReferenceType())
                     {
                         case TARGET_REFERENCE_TYPE_CASTER:
                             SelectImplicitCasterDestTargets(effIndex, targetType);
                             break;
                         case TARGET_REFERENCE_TYPE_TARGET:
                             SelectImplicitTargetDestTargets(effIndex, targetType);
                             break;
                         case TARGET_REFERENCE_TYPE_DEST:
                             SelectImplicitDestDestTargets(effIndex, targetType);
                             break;
                         default:
                             ASSERT(false && "Spell::SelectEffectImplicitTargets: received not implemented select target reference type for TARGET_TYPE_OBJECT_DEST");
                             break;
                     }
                     break;
                default:
                    switch (targetType.GetReferenceType())
                    {
                        case TARGET_REFERENCE_TYPE_CASTER:
                            SelectImplicitCasterObjectTargets(effIndex, targetType);
                            break;
                        case TARGET_REFERENCE_TYPE_TARGET:
                            SelectImplicitTargetObjectTargets(effIndex, targetType);
                            break;
                        default:
                            ASSERT(false && "Spell::SelectEffectImplicitTargets: received not implemented select target reference type for TARGET_TYPE_OBJECT");
                            break;
                    }
                    break;
            }
            break;
        case TARGET_SELECT_CATEGORY_NYI:
            TC_LOG_DEBUG("spells", "SPELL: target type %u, found in spellID %u, effect %u is not implemented yet!", m_spellInfo->Id, effIndex, targetType.GetTarget());
            break;
        default:
            ASSERT(false && "Spell::SelectEffectImplicitTargets: received not implemented select target category");
            break;
    }
}

void Spell::SelectImplicitChannelTargets(SpellEffIndex effIndex, SpellImplicitTargetInfo const& targetType)
{
    if (targetType.GetReferenceType() != TARGET_REFERENCE_TYPE_CASTER)
    {
        ASSERT(false && "Spell::SelectImplicitChannelTargets: received not implemented target reference type");
        return;
    }

    Spell* channeledSpell = m_originalCaster->GetCurrentSpell(CURRENT_CHANNELED_SPELL);
    if (!channeledSpell)
    {
        TC_LOG_DEBUG("spells", "Spell::SelectImplicitChannelTargets: cannot find channel spell for spell ID %u, effect %u", m_spellInfo->Id, effIndex);
        return;
    }
    switch (targetType.GetTarget())
    {
        case TARGET_UNIT_CHANNEL_TARGET:
        {
            WorldObject* target = ObjectAccessor::GetUnit(*m_caster, m_originalCaster->GetChannelObjectGuid());
            CallScriptObjectTargetSelectHandlers(target, effIndex, targetType);
            // unit target may be no longer avalible - teleported out of map for example
            if (target && target->ToUnit())
                AddUnitTarget(target->ToUnit(), 1 << effIndex);
            else
                TC_LOG_DEBUG("spells", "SPELL: cannot find channel spell target for spell ID %u, effect %u", m_spellInfo->Id, effIndex);
            break;
        }
        case TARGET_DEST_CHANNEL_TARGET:
            if (channeledSpell->m_targets.HasDst())
                m_targets.SetDst(channeledSpell->m_targets);
            else if (WorldObject* target = ObjectAccessor::GetWorldObject(*m_caster, m_originalCaster->GetChannelObjectGuid()))
            {
                CallScriptObjectTargetSelectHandlers(target, effIndex, targetType);
                if (target)
                    m_targets.SetDst(*target);
            }
            else
                TC_LOG_DEBUG("spells", "SPELL: cannot find channel spell destination for spell ID %u, effect %u", m_spellInfo->Id, effIndex);
            break;
        case TARGET_DEST_CHANNEL_CASTER:
            m_targets.SetDst(*channeledSpell->GetCaster());
            break;
        default:
            ASSERT(false && "Spell::SelectImplicitChannelTargets: received not implemented target type");
            break;
    }
}

void Spell::SelectImplicitNearbyTargets(SpellEffIndex effIndex, SpellImplicitTargetInfo const& targetType, uint32 effMask)
{
    if (targetType.GetReferenceType() != TARGET_REFERENCE_TYPE_CASTER)
    {
        ASSERT(false && "Spell::SelectImplicitNearbyTargets: received not implemented target reference type");
        return;
    }

    float range = 0.0f;
    switch (targetType.GetCheckType())
    {
        case TARGET_CHECK_ENEMY:
            range = m_spellInfo->GetMaxRange(false, m_caster, this);
            break;
        case TARGET_CHECK_ALLY:
        case TARGET_CHECK_PARTY:
        case TARGET_CHECK_RAID:
        case TARGET_CHECK_RAID_CLASS:
            range = m_spellInfo->GetMaxRange(true, m_caster, this);
            break;
        case TARGET_CHECK_ENTRY:
        case TARGET_CHECK_DEFAULT:
            range = m_spellInfo->GetMaxRange(m_spellInfo->IsPositive(), m_caster, this);
            break;
        default:
            ASSERT(false && "Spell::SelectImplicitNearbyTargets: received not implemented selection check type");
            break;
    }

    ConditionList* condList = m_spellInfo->Effects[effIndex].ImplicitTargetConditions;

    // handle emergency case - try to use other provided targets if no conditions provided
    if (targetType.GetCheckType() == TARGET_CHECK_ENTRY && (!condList || condList->empty()))
    {
        TC_LOG_DEBUG("spells", "Spell::SelectImplicitNearbyTargets: no conditions entry for target with TARGET_CHECK_ENTRY of spell ID %u, effect %u - selecting default targets", m_spellInfo->Id, effIndex);
        switch (targetType.GetObjectType())
        {
            case TARGET_OBJECT_TYPE_GOBJ:
                if (m_spellInfo->RequiresSpellFocus)
                {
                    if (focusObject)
                        AddGOTarget(focusObject, effMask);
                    return;
                }
                break;
            case TARGET_OBJECT_TYPE_DEST:
                if (m_spellInfo->RequiresSpellFocus)
                {
                    if (focusObject)
                        m_targets.SetDst(*focusObject);
                    return;
                }
                break;
            default:
                break;
        }
    }

    WorldObject* target = SearchNearbyTarget(range, targetType.GetObjectType(), targetType.GetCheckType(), condList);
    if (!target)
    {
        TC_LOG_DEBUG("spells", "Spell::SelectImplicitNearbyTargets: cannot find nearby target for spell ID %u, effect %u", m_spellInfo->Id, effIndex);
        return;
    }

    CallScriptObjectTargetSelectHandlers(target, effIndex, targetType);
    if (!target)
    {
        TC_LOG_DEBUG("spells", "Spell::SelectImplicitNearbyTargets: OnObjectTargetSelect script hook for spell Id %u set NULL target, effect %u", m_spellInfo->Id, effIndex);
        return;
    }

    switch (targetType.GetObjectType())
    {
        case TARGET_OBJECT_TYPE_UNIT:
        {
            if (Unit* unitTarget = target->ToUnit())
                AddUnitTarget(unitTarget, effMask, true, false);
            else
            {
                TC_LOG_DEBUG("spells", "Spell::SelectImplicitNearbyTargets: OnObjectTargetSelect script hook for spell Id %u set object of wrong type, expected unit, got %s, effect %u", m_spellInfo->Id, target->GetGUID().GetTypeName(), effMask);
                return;
            }
            break;
        }
        case TARGET_OBJECT_TYPE_GOBJ:
            if (GameObject* gobjTarget = target->ToGameObject())
                AddGOTarget(gobjTarget, effMask);
            else
            {
                TC_LOG_DEBUG("spells", "Spell::SelectImplicitNearbyTargets: OnObjectTargetSelect script hook for spell Id %u set object of wrong type, expected gameobject, got %s, effect %u", m_spellInfo->Id, target->GetGUID().GetTypeName(), effMask);
                return;
            }
            break;
        case TARGET_OBJECT_TYPE_DEST:
            m_targets.SetDst(*target);
            break;
        default:
            ASSERT(false && "Spell::SelectImplicitNearbyTargets: received not implemented target object type");
            break;
    }

    SelectImplicitChainTargets(effIndex, targetType, target, effMask);
}

void Spell::SelectImplicitConeTargets(SpellEffIndex effIndex, SpellImplicitTargetInfo const& targetType, uint32 effMask)
{
    if (targetType.GetReferenceType() != TARGET_REFERENCE_TYPE_CASTER)
    {
        ASSERT(false && "Spell::SelectImplicitConeTargets: received not implemented target reference type");
        return;
    }
    std::list<WorldObject*> targets;
    SpellTargetObjectTypes objectType = targetType.GetObjectType();
    SpellTargetCheckTypes selectionType = targetType.GetCheckType();
    ConditionList* condList = m_spellInfo->Effects[effIndex].ImplicitTargetConditions;
    float coneAngle = float(M_PI) / 2;
    float radius = m_spellInfo->Effects[effIndex].CalcRadius(m_caster) * m_spellValue->RadiusMod;

    if (uint32 containerTypeMask = GetSearcherTypeMask(objectType, condList))
    {
        Trinity::WorldObjectSpellConeTargetCheck check(coneAngle, radius, m_caster, m_spellInfo, selectionType, condList);
        Trinity::WorldObjectListSearcher<Trinity::WorldObjectSpellConeTargetCheck> searcher(m_caster, targets, check, containerTypeMask);
        SearchTargets<Trinity::WorldObjectListSearcher<Trinity::WorldObjectSpellConeTargetCheck> >(searcher, containerTypeMask, m_caster, m_caster, radius);

        CallScriptObjectAreaTargetSelectHandlers(targets, effIndex, targetType);

        if (!targets.empty())
        {
            // Other special target selection goes here
            if (uint32 maxTargets = m_spellValue->MaxAffectedTargets)
                Trinity::Containers::RandomResizeList(targets, maxTargets);

            for (std::list<WorldObject*>::iterator itr = targets.begin(); itr != targets.end(); ++itr)
            {
                if (Unit* unitTarget = (*itr)->ToUnit())
                    AddUnitTarget(unitTarget, effMask, false);
                else if (GameObject* gObjTarget = (*itr)->ToGameObject())
                    AddGOTarget(gObjTarget, effMask);
            }
        }
    }
}

void Spell::SelectImplicitAreaTargets(SpellEffIndex effIndex, SpellImplicitTargetInfo const& targetType, uint32 effMask)
{
    Unit* referer = NULL;
    switch (targetType.GetReferenceType())
    {
        case TARGET_REFERENCE_TYPE_SRC:
        case TARGET_REFERENCE_TYPE_DEST:
        case TARGET_REFERENCE_TYPE_CASTER:
            referer = m_caster;
            break;
        case TARGET_REFERENCE_TYPE_TARGET:
            referer = m_targets.GetUnitTarget();
            break;
        case TARGET_REFERENCE_TYPE_LAST:
        {
            // find last added target for this effect
            for (std::list<TargetInfo>::reverse_iterator ihit = m_UniqueTargetInfo.rbegin(); ihit != m_UniqueTargetInfo.rend(); ++ihit)
            {
                if (ihit->effectMask & (1<<effIndex))
                {
                    referer = ObjectAccessor::GetUnit(*m_caster, ihit->targetGUID);
                    break;
                }
            }
            break;
        }
        default:
            ASSERT(false && "Spell::SelectImplicitAreaTargets: received not implemented target reference type");
            return;
    }

    if (!referer)
        return;

    Position const* center = NULL;
    switch (targetType.GetReferenceType())
    {
        case TARGET_REFERENCE_TYPE_SRC:
            center = m_targets.GetSrcPos();
            break;
        case TARGET_REFERENCE_TYPE_DEST:
            center = m_targets.GetDstPos();
            break;
        case TARGET_REFERENCE_TYPE_CASTER:
        case TARGET_REFERENCE_TYPE_TARGET:
        case TARGET_REFERENCE_TYPE_LAST:
            center = referer;
            break;
         default:
             ASSERT(false && "Spell::SelectImplicitAreaTargets: received not implemented target reference type");
             return;
    }

    std::list<WorldObject*> targets;
    float radius = m_spellInfo->Effects[effIndex].CalcRadius(m_caster) * m_spellValue->RadiusMod;
    SearchAreaTargets(targets, radius, center, referer, targetType.GetObjectType(), targetType.GetCheckType(), m_spellInfo->Effects[effIndex].ImplicitTargetConditions);

    CallScriptObjectAreaTargetSelectHandlers(targets, effIndex, targetType);

    if (!targets.empty())
    {
        // Other special target selection goes here
        if (uint32 maxTargets = m_spellValue->MaxAffectedTargets)
            Trinity::Containers::RandomResizeList(targets, maxTargets);

        for (std::list<WorldObject*>::iterator itr = targets.begin(); itr != targets.end(); ++itr)
        {
            if (Unit* unitTarget = (*itr)->ToUnit())
                AddUnitTarget(unitTarget, effMask, false, true, center);
            else if (GameObject* gObjTarget = (*itr)->ToGameObject())
                AddGOTarget(gObjTarget, effMask);
        }
    }
}

void Spell::SelectImplicitCasterDestTargets(SpellEffIndex effIndex, SpellImplicitTargetInfo const& targetType)
{
    SpellDestination dest(*m_caster);

    switch (targetType.GetTarget())
    {
        case TARGET_DEST_CASTER:
            break;
        case TARGET_DEST_HOME:
            if (Player* playerCaster = m_caster->ToPlayer())
                dest = SpellDestination(playerCaster->m_homebindX, playerCaster->m_homebindY, playerCaster->m_homebindZ, playerCaster->GetOrientation(), playerCaster->m_homebindMapId);
            break;
        case TARGET_DEST_DB:
            if (SpellTargetPosition const* st = sSpellMgr->GetSpellTargetPosition(m_spellInfo->Id, effIndex))
            {
                /// @todo fix this check
                if (m_spellInfo->HasEffect(SPELL_EFFECT_TELEPORT_UNITS) || m_spellInfo->HasEffect(SPELL_EFFECT_BIND))
                    dest = SpellDestination(st->target_X, st->target_Y, st->target_Z, st->target_Orientation, (int32)st->target_mapId);
                else if (st->target_mapId == m_caster->GetMapId())
                    dest = SpellDestination(st->target_X, st->target_Y, st->target_Z, st->target_Orientation);
            }
            else
            {
                TC_LOG_DEBUG("spells", "SPELL: unknown target coordinates for spell ID %u", m_spellInfo->Id);
                if (WorldObject* target = m_targets.GetObjectTarget())
                    dest = SpellDestination(*target);
            }
            break;
        case TARGET_DEST_CASTER_FISHING:
        {
            float minDist = m_spellInfo->GetMinRange(true);
            float maxDist = m_spellInfo->GetMaxRange(true);
            float dist = frand(minDist, maxDist);
            float x, y, z;
            float angle = float(rand_norm()) * static_cast<float>(M_PI * 35.0f / 180.0f) - static_cast<float>(M_PI * 17.5f / 180.0f);
            m_caster->GetClosePoint(x, y, z, DEFAULT_WORLD_OBJECT_SIZE, dist, angle);

            float ground = m_caster->GetMap()->GetHeight(m_caster->GetPhaseMask(), x, y, z, true, 50.0f);
            float liquidLevel = VMAP_INVALID_HEIGHT_VALUE;
            LiquidData liquidData;
            if (m_caster->GetMap()->getLiquidStatus(x, y, z, MAP_ALL_LIQUIDS, &liquidData))
                liquidLevel = liquidData.level;

            if (liquidLevel <= ground) // When there is no liquid Map::GetWaterOrGroundLevel returns ground level
            {
                SendCastResult(SPELL_FAILED_NOT_HERE);
                SendChannelUpdate(0);
                finish(false);
                return;
            }

            if (ground + 0.75 > liquidLevel)
            {
                SendCastResult(SPELL_FAILED_TOO_SHALLOW);
                SendChannelUpdate(0);
                finish(false);
                return;
            }

            dest = SpellDestination(x, y, liquidLevel, m_caster->GetOrientation());
            break;
        }
        default:
        {
            float dist;
            float angle = targetType.CalcDirectionAngle();
            float objSize = m_caster->GetObjectSize();
            if (targetType.GetTarget() == TARGET_DEST_CASTER_SUMMON)
                dist = PET_FOLLOW_DIST;
            else
                dist = m_spellInfo->Effects[effIndex].CalcRadius(m_caster);

            if (dist < objSize)
                dist = objSize;
            else if (targetType.GetTarget() == TARGET_DEST_CASTER_RANDOM)
                dist = objSize + (dist - objSize) * float(rand_norm());

            Position pos = dest._position;
            m_caster->MovePositionToFirstCollision(pos, dist, angle);

            dest.Relocate(pos);
            break;
        }
    }

    CallScriptDestinationTargetSelectHandlers(dest, effIndex, targetType);
    m_targets.SetDst(dest);
}

void Spell::SelectImplicitTargetDestTargets(SpellEffIndex effIndex, SpellImplicitTargetInfo const& targetType)
{
    ASSERT(m_targets.GetObjectTarget() && "Spell::SelectImplicitTargetDestTargets - no explicit object target available!");
    WorldObject* target = m_targets.GetObjectTarget();

    SpellDestination dest(*target);

    switch (targetType.GetTarget())
    {
        case TARGET_DEST_TARGET_ENEMY:
        case TARGET_DEST_TARGET_ANY:
            break;
        default:
        {
            float angle = targetType.CalcDirectionAngle();
            float objSize = target->GetObjectSize();
            float dist = m_spellInfo->Effects[effIndex].CalcRadius(m_caster);
            if (dist < objSize)
                dist = objSize;
            else if (targetType.GetTarget() == TARGET_DEST_TARGET_RANDOM)
                dist = objSize + (dist - objSize) * float(rand_norm());

            Position pos = dest._position;
            target->MovePositionToFirstCollision(pos, dist, angle);

            dest.Relocate(pos);
            break;
        }
    }

    CallScriptDestinationTargetSelectHandlers(dest, effIndex, targetType);
    m_targets.SetDst(dest);
}

void Spell::SelectImplicitDestDestTargets(SpellEffIndex effIndex, SpellImplicitTargetInfo const& targetType)
{
    // set destination to caster if no dest provided
    // can only happen if previous destination target could not be set for some reason
    // (not found nearby target, or channel target for example
    // maybe we should abort the spell in such case?
    CheckDst();

    SpellDestination dest(*m_targets.GetDst());

    switch (targetType.GetTarget())
    {
        case TARGET_DEST_DYNOBJ_ENEMY:
        case TARGET_DEST_DYNOBJ_ALLY:
        case TARGET_DEST_DYNOBJ_NONE:
        case TARGET_DEST_DEST:
            return;
        case TARGET_DEST_TRAJ:
            SelectImplicitTrajTargets(effIndex);
            return;
        default:
        {
            float angle = targetType.CalcDirectionAngle();
            float dist = m_spellInfo->Effects[effIndex].CalcRadius(m_caster);
            if (targetType.GetTarget() == TARGET_DEST_DEST_RANDOM)
                dist *= float(rand_norm());

            Position pos = dest._position;
            m_ca…