/*
 * Copyright (C) 2012-2020 CypherCore <http://github.com/CypherCore>
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

using Framework.Constants;
using Framework.Dynamic;
using Game.AI;
using Game.Entities;
using Game.Scripting;
using Game.Spells;
using System;
using System.Collections.Generic;
using System.Linq;
using Game.Maps;

namespace Scripts.Spells.Priest
{
    struct SpellIds
    {
        public const uint AngelicFeatherAreatrigger = 158624;
        public const uint AngelicFeatherAura = 121557;
        public const uint ArmorOfFaith = 28810;
        public const uint Atonement = 81749;
        public const uint AtonementHeal = 81751;
        public const uint AtonementTriggered = 194384;
        public const uint BlessedHealing = 70772;
        public const uint BodyAndSoul = 64129;
        public const uint BodyAndSoulSpeed = 65081;
        public const uint DivineBlessing = 40440;
        public const uint DivineWrath = 40441;
        public const uint GuardianSpiritHeal = 48153;
        public const uint ItemEfficiency = 37595;
        public const uint LeapOfFaithEffect = 92832;
        public const uint LevitateEffect = 111759;
        public const uint OracularHeal = 26170;
        public const uint PenanceR1 = 47540;
        public const uint PenanceR1Damage = 47758;
        public const uint PenanceR1Heal = 47757;
        public const uint PrayerOfMendingAura = 41635;
        public const uint PrayerOfMendingHeal = 33110;
        public const uint PrayerOfMendingJump = 155793;
        public const uint RenewedHope = 197469;
        public const uint RenewedHopeEffect = 197470;
        public const uint ShieldDisciplineEnergize = 47755;
        public const uint ShieldDisciplinePassive = 197045;
        public const uint SpiritOfRedemption = 27827;
        public const uint StrengthOfSoul = 197535;
        public const uint StrengthOfSoulEffect = 197548;
        public const uint ThePenitentAura = 200347;
        public const uint VampiricEmbraceHeal = 15290;
        public const uint VampiricTouchDispel = 64085;
        public const uint VoidShield = 199144;
        public const uint VoidShieldEffect = 199145;

        public const uint GenReplenishment = 57669;
    }

    [Script] // 26169 - Oracle Healing Bonus
    class spell_pri_aq_3p_bonus : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.OracularHeal);
        }

        void HandleProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            PreventDefaultAction();
            Unit caster = eventInfo.GetActor();
            if (caster == eventInfo.GetProcTarget())
                return;

            HealInfo healInfo = eventInfo.GetHealInfo();
            if (healInfo == null || healInfo.GetHeal() == 0)
                return;

            int amount = (int)MathFunctions.CalculatePct(healInfo.GetHeal(), 10);
            caster.CastCustomSpell(SpellIds.OracularHeal, SpellValueMod.BasePoint0, amount, caster, true, null, aurEff);
        }

        public override void Register()
        {
            OnEffectProc.Add(new EffectProcHandler(HandleProc, 0, AuraType.Dummy));
        }
    }

    [Script] // 81749 - Atonement
    public class spell_pri_atonement : AuraScript
    {
        List<ObjectGuid> _appliedAtonements = new List<ObjectGuid>();

        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.AtonementHeal);
        }

        bool CheckProc(ProcEventInfo eventInfo)
        {
            return eventInfo.GetDamageInfo() != null;
        }

        void HandleProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            DamageInfo damageInfo = eventInfo.GetDamageInfo();
            int heal = (int)MathFunctions.CalculatePct(damageInfo.GetDamage(), aurEff.GetAmount());
            _appliedAtonements.RemoveAll(targetGuid =>
            {
                Unit target = Global.ObjAccessor.GetUnit(GetTarget(), targetGuid);
                if (target)
                {
                    if (target.GetExactDist(GetTarget()) < GetSpellInfo().GetEffect(1).CalcValue())
                        GetTarget().CastCustomSpell(SpellIds.AtonementHeal, SpellValueMod.BasePoint0, heal, target, true);

                    return false;
                }
                return true;
            });
        }

        public override void Register()
        {
            DoCheckProc.Add(new CheckProcHandler(CheckProc));
            OnEffectProc.Add(new EffectProcHandler(HandleProc, 0, AuraType.Dummy));
        }

        public void AddAtonementTarget(ObjectGuid target)
        {
            _appliedAtonements.Add(target);
        }

        public void RemoveAtonementTarget(ObjectGuid target)
        {
            _appliedAtonements.Remove(target);
        }
    }

    [Script] // 194384 - Atonement
    class spell_pri_atonement_triggered : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.Atonement);
        }

        void HandleOnApply(AuraEffect aurEff, AuraEffectHandleModes mode)
        {
            Unit caster = GetCaster();
            if (caster)
            {
                Aura atonement = caster.GetAura(SpellIds.Atonement);
                if (atonement != null)
                {
                    var script = atonement.GetScript<spell_pri_atonement>("spell_pri_atonement");
                    if (script != null)
                        script.AddAtonementTarget(GetTarget().GetGUID());
                }
            }
        }

        void HandleOnRemove(AuraEffect aurEff, AuraEffectHandleModes mode)
        {
            Unit caster = GetCaster();
            if (caster)
            {
                Aura atonement = caster.GetAura(SpellIds.Atonement);
                if (atonement != null)
                {
                    var script = atonement.GetScript<spell_pri_atonement>("spell_pri_atonement");
                    if (script != null)
                        script.RemoveAtonementTarget(GetTarget().GetGUID());
                }
            }
        }

        public override void Register()
        {
            OnEffectApply.Add(new EffectApplyHandler(HandleOnApply, 0, AuraType.Dummy, AuraEffectHandleModes.Real));
            OnEffectRemove.Add(new EffectApplyHandler(HandleOnRemove, 0, AuraType.Dummy, AuraEffectHandleModes.Real));
        }
    }

    // 64844 - Divine Hymn
    [Script]
    class spell_pri_divine_hymn : SpellScript
    {
        void FilterTargets(List<WorldObject> targets)
        {
            targets.RemoveAll(obj =>
            {
                Unit target = obj.ToUnit();
                if (target)
                    return !GetCaster().IsInRaidWith(target);

                return true;
            });

            uint maxTargets = 3;

            if (targets.Count > maxTargets)
            {
                targets.Sort(new HealthPctOrderPred());
                targets.Resize(maxTargets);
            }
        }

        public override void Register()
        {
            OnObjectAreaTargetSelect.Add(new ObjectAreaTargetSelectHandler(FilterTargets, SpellConst.EffectAll, Targets.UnitSrcAreaAlly));
        }
    }

    // 47788 - Guardian Spirit
    [Script]
    class spell_pri_guardian_spirit : AuraScript
    {
        uint healPct;

        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.GuardianSpiritHeal);
        }

        public override bool Load()
        {
            healPct = (uint)GetSpellInfo().GetEffect(1).CalcValue();
            return true;
        }

        void CalculateAmount(AuraEffect aurEff, ref int amount, ref bool canBeRecalculated)
        {
            // Set absorbtion amount to unlimited
            amount = -1;
        }

        void Absorb(AuraEffect aurEff, DamageInfo dmgInfo, ref uint absorbAmount)
        {
            Unit target = GetTarget();
            if (dmgInfo.GetDamage() < target.GetHealth())
                return;

            int healAmount = (int)target.CountPctFromMaxHealth((int)healPct);
            // Remove the aura now, we don't want 40% healing bonus
            Remove(AuraRemoveMode.EnemySpell);
            target.CastCustomSpell(target, SpellIds.GuardianSpiritHeal, healAmount, 0, 0, true);
            absorbAmount = dmgInfo.GetDamage();
        }

        public override void Register()
        {
            DoEffectCalcAmount.Add(new EffectCalcAmountHandler(CalculateAmount, 1, AuraType.SchoolAbsorb));
            OnEffectAbsorb.Add(new EffectAbsorbHandler(Absorb, 1));
        }
    }

    [Script] // 40438 - Priest Tier 6 Trinket
    class spell_pri_item_t6_trinket : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.DivineBlessing, SpellIds.DivineWrath);
        }

        void HandleProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            PreventDefaultAction();
            Unit caster = eventInfo.GetActor();
            if (eventInfo.GetSpellTypeMask().HasAnyFlag(ProcFlagsSpellType.Heal))
                caster.CastSpell((Unit)null, SpellIds.DivineBlessing, true);

            if (eventInfo.GetSpellTypeMask().HasAnyFlag(ProcFlagsSpellType.Damage))
                caster.CastSpell((Unit)null, SpellIds.DivineWrath, true);
        }

        public override void Register()
        {
            OnEffectProc.Add(new EffectProcHandler(HandleProc, 0, AuraType.Dummy));
        }
    }

    // 92833 - Leap of Faith
    [Script]
    class spell_pri_leap_of_faith_effect_trigger : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.LeapOfFaithEffect);
        }

        void HandleEffectDummy(uint effIndex)
        {
            Position destPos = GetHitDest().GetPosition();

            SpellCastTargets targets = new SpellCastTargets();
            targets.SetDst(destPos);
            targets.SetUnitTarget(GetCaster());
            GetHitUnit().CastSpell(targets, Global.SpellMgr.GetSpellInfo((uint)GetEffectValue(), GetCastDifficulty()), null);
        }

        public override void Register()
        {
            OnEffectHitTarget.Add(new EffectHandler(HandleEffectDummy, 0, SpellEffectName.Dummy));
        }
    }

    [Script] // 1706 - Levitate
    class spell_pri_levitate : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.LevitateEffect);
        }

        void HandleDummy(uint effIndex)
        {
            GetCaster().CastSpell(GetHitUnit(), SpellIds.LevitateEffect, true);
        }

        public override void Register()
        {
            OnEffectHitTarget.Add(new EffectHandler(HandleDummy, 0, SpellEffectName.Dummy));
        }
    }

    // 47540 - Penance
    [Script]
    class spell_pri_penance : SpellScript
    {
        public override bool Load()
        {
            return GetCaster().IsTypeId(TypeId.Player);
        }

        public override bool Validate(SpellInfo spellInfo)
        {
            SpellInfo firstRankSpellInfo = Global.SpellMgr.GetSpellInfo(SpellIds.PenanceR1, Difficulty.None);
            if (firstRankSpellInfo == null)
                return false;

            // can't use other spell than this penance due to spell_ranks dependency
            if (!spellInfo.IsRankOf(firstRankSpellInfo))
                return false;

            byte rank = spellInfo.GetRank();
            if (Global.SpellMgr.GetSpellWithRank(SpellIds.PenanceR1Damage, rank, true) == 0)
                return false;
            if (Global.SpellMgr.GetSpellWithRank(SpellIds.PenanceR1Heal, rank, true) == 0)
                return false;

            return true;
        }

        void HandleDummy(uint effIndex)
        {
            Unit caster = GetCaster();
            Unit target = GetHitUnit();
            if (target)
            {
                if (!target.IsAlive())
                    return;

                byte rank = GetSpellInfo().GetRank();

                if (caster.IsFriendlyTo(target))
                    caster.CastSpell(target, Global.SpellMgr.GetSpellWithRank(SpellIds.PenanceR1Heal, rank), false);
                else
                    caster.CastSpell(target, Global.SpellMgr.GetSpellWithRank(SpellIds.PenanceR1Damage, rank), false);
            }
        }

        SpellCastResult CheckCast()
        {
            Player caster = GetCaster().ToPlayer();
            Unit target = GetExplTargetUnit();
            if (target)
            {
                if (!caster.IsFriendlyTo(target))
                {
                    if (!caster.IsValidAttackTarget(target))
                        return SpellCastResult.BadTargets;

                    if (!caster.IsInFront(target))
                        return SpellCastResult.NotInfront;
                }
            }
            return SpellCastResult.SpellCastOk;
        }

        public override void Register()
        {
            OnEffectHitTarget.Add(new EffectHandler(HandleDummy, 0, SpellEffectName.Dummy));
            OnCheckCast.Add(new CheckCastHandler(CheckCast));
        }
    }

    [Script] // 17 - Power Word: Shield
    class spell_pri_power_word_shield : AuraScript
    {
        void CalculateAmount(AuraEffect auraEffect, ref int amount, ref bool canBeRecalculated)
        {
            canBeRecalculated = false;

            Player player = GetCaster().ToPlayer();
            if (player)
            {
                int playerMastery = (int)player.GetRatingBonusValue(CombatRating.Mastery);
                int playerSpellPower = player.SpellBaseDamageBonusDone(SpellSchoolMask.Holy);
                int playerVersatileDamage = (int)player.GetRatingBonusValue(CombatRating.VersatilityDamageDone);

                //Formula taken from SpellWork
                amount = (int)((playerSpellPower * 5.5f) + playerMastery) * (1 + playerVersatileDamage);
            }
        }

        void HandleOnApply(AuraEffect aurEff, AuraEffectHandleModes mode)
        {
            Unit caster = GetCaster();
            Unit target = GetTarget();
            if (!caster)
                return;

            if (caster.HasAura(SpellIds.BodyAndSoul))
                caster.CastSpell(target, SpellIds.BodyAndSoulSpeed, true);
            if (caster.HasAura(SpellIds.StrengthOfSoul))
                caster.CastSpell(target, SpellIds.StrengthOfSoulEffect, true);
            if (caster.HasAura(SpellIds.RenewedHope))
                caster.CastSpell(target, SpellIds.RenewedHopeEffect, true);
            if (caster.HasAura(SpellIds.VoidShield) && caster == target)
                caster.CastSpell(target, SpellIds.VoidShieldEffect, true);
            if (caster.HasAura(SpellIds.Atonement))
                caster.CastSpell(target, SpellIds.AtonementTriggered, true);
        }

        void HandleOnRemove(AuraEffect aurEff, AuraEffectHandleModes mode)
        {
            GetTarget().RemoveAura(SpellIds.StrengthOfSoulEffect);
            Unit caster = GetCaster();
            if (caster)
                if (GetTargetApplication().GetRemoveMode() == AuraRemoveMode.EnemySpell && caster.HasAura(SpellIds.ShieldDisciplinePassive))
                    caster.CastSpell(caster, SpellIds.ShieldDisciplineEnergize, true);
        }

        public override void Register()
        {
            DoEffectCalcAmount.Add(new EffectCalcAmountHandler(CalculateAmount, 0, AuraType.SchoolAbsorb));
            AfterEffectApply.Add(new EffectApplyHandler(HandleOnApply, 0, AuraType.SchoolAbsorb, AuraEffectHandleModes.RealOrReapplyMask));
            AfterEffectRemove.Add(new EffectApplyHandler(HandleOnRemove, 0, AuraType.SchoolAbsorb, AuraEffectHandleModes.Real));
        }
    }

    [Script] // 33076 - Prayer of Mending
    class spell_pri_prayer_of_mending : SpellScript
    {
        SpellInfo _spellInfoHeal;
        SpellEffectInfo _healEffectDummy;

        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PrayerOfMendingHeal, SpellIds.PrayerOfMendingAura)
                && Global.SpellMgr.GetSpellInfo(SpellIds.PrayerOfMendingHeal, Difficulty.None).GetEffect(0) != null;
        }

        public override bool Load()
        {
            _spellInfoHeal = Global.SpellMgr.GetSpellInfo(SpellIds.PrayerOfMendingHeal, Difficulty.None);
            _healEffectDummy = _spellInfoHeal.GetEffect(0);
            return true;
        }

        void HandleEffectDummy(uint effIndex)
        {
            uint basePoints = GetCaster().SpellHealingBonusDone(GetHitUnit(), _spellInfoHeal, (uint)_healEffectDummy.CalcValue(GetCaster()), DamageEffectType.Heal, _healEffectDummy);
            Dictionary<SpellValueMod, int> values = new Dictionary<SpellValueMod, int>();
            values.Add(SpellValueMod.AuraStack, (byte)GetEffectValue());
            values.Add(SpellValueMod.BasePoint0, (int)basePoints);
            GetCaster().CastCustomSpell(SpellIds.PrayerOfMendingAura, values, GetHitUnit(), TriggerCastFlags.FullMask);
        }

        public override void Register()
        {
            OnEffectHit .Add(new EffectHandler(HandleEffectDummy, 0, SpellEffectName.Dummy));
        }
    }

    [Script] // 41635 - Prayer of Mending (Aura) - SPELL_PRIEST_PRAYER_OF_MENDING_AURA
    class spell_pri_prayer_of_mending_AuraScript : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PrayerOfMendingHeal, SpellIds.PrayerOfMendingJump);
        }

        void HandleHeal(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            // Caster: player (priest) that cast the Prayer of Mending
            // Target: player that currently has Prayer of Mending aura on him
            Unit target = GetTarget();
            Unit caster = GetCaster();
            if (caster != null)
            {
                // Cast the spell to heal the owner
                caster.CastSpell(target, SpellIds.PrayerOfMendingHeal, true, null, aurEff);

                // Only cast jump if stack is higher than 0
                int stackAmount = GetStackAmount();
                if (stackAmount > 1)
                    target.CastCustomSpell(SpellIds.PrayerOfMendingJump, SpellValueMod.BasePoint0, stackAmount - 1, target, true, null, aurEff, caster.GetGUID());

                Remove();
            }
        }

        public override void Register()
        {
            OnEffectProc.Add(new EffectProcHandler(HandleHeal, 0, AuraType.Dummy));
        }
    }

    [Script] // 155793 - prayer of mending (Jump) - SPELL_PRIEST_PRAYER_OF_MENDING_JUMP
    class spell_pri_prayer_of_mending_jump : SpellScript
    {
        SpellInfo _spellInfoHeal;
        SpellEffectInfo _healEffectDummy;

        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PrayerOfMendingHeal, SpellIds.PrayerOfMendingAura)
                && Global.SpellMgr.GetSpellInfo(SpellIds.PrayerOfMendingHeal, Difficulty.None).GetEffect(0) != null;
        }

        public override bool Load()
        {
            _spellInfoHeal = Global.SpellMgr.GetSpellInfo(SpellIds.PrayerOfMendingHeal, Difficulty.None);
            _healEffectDummy = _spellInfoHeal.GetEffect(0);
            return true;
        }

        void OnTargetSelect(List<WorldObject> targets)
        {
            // Find the best target - prefer players over pets
            bool foundPlayer = false;
            foreach (WorldObject worldObject in targets)
            {
                if (worldObject.IsPlayer())
                {
                    foundPlayer = true;
                    break;
                }
            }

            if (foundPlayer)
                targets.RemoveAll(new ObjectTypeIdCheck(TypeId.Player, false));

            // choose one random target from targets
            if (targets.Count > 1)
            {
                WorldObject selected = targets.SelectRandom();
                targets.Clear();
                targets.Add(selected);
            }
        }

        void HandleJump(uint effIndex)
        {
            Unit origCaster = GetOriginalCaster(); // the one that started the prayer of mending chain
            Unit target = GetHitUnit(); // the target we decided the aura should jump to

            if (origCaster)
            {
                uint basePoints = origCaster.SpellHealingBonusDone(target, _spellInfoHeal, (uint)_healEffectDummy.CalcValue(origCaster), DamageEffectType.Heal, _healEffectDummy);
                Dictionary<SpellValueMod, int> values = new Dictionary<SpellValueMod, int>();
                values.Add(SpellValueMod.AuraStack, (byte)GetEffectValue());
                values.Add(SpellValueMod.BasePoint0, (int)basePoints);
                origCaster.CastCustomSpell(SpellIds.PrayerOfMendingAura, values, target, TriggerCastFlags.FullMask);
            }
        }

        public override void Register()
        {
            OnObjectAreaTargetSelect .Add(new ObjectAreaTargetSelectHandler(OnTargetSelect, 0, Targets.UnitSrcAreaAlly));
            OnEffectHitTarget.Add(new EffectHandler(HandleJump, 0, SpellEffectName.Dummy));
        }
    }

    [Script] // 20711 - Spirit of Redemption
    class spell_priest_spirit_of_redemption : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.SpiritOfRedemption);
        }

        void HandleAbsorb(AuraEffect aurEff, DamageInfo dmgInfo, ref uint absorbAmount)
        {
            Unit target = GetTarget();
            if (dmgInfo.GetDamage() >= target.GetHealth())
            {
                target.CastSpell(target, SpellIds.SpiritOfRedemption, TriggerCastFlags.FullMask, null, aurEff);
                target.SetFullHealth();
                return;
            }

            PreventDefaultAction();
        }

        public override void Register()
        {
            OnEffectAbsorb.Add(new EffectAbsorbHandler(HandleAbsorb, 0));
        }
    }

    [Script] // 28809 - Greater Heal
    class spell_pri_t3_4p_bonus : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.ArmorOfFaith);
        }

        void HandleProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            PreventDefaultAction();
            eventInfo.GetActor().CastSpell(eventInfo.GetProcTarget(), SpellIds.ArmorOfFaith, true, null, aurEff);
        }

        public override void Register()
        {
            OnEffectProc.Add(new EffectProcHandler(HandleProc, 0, AuraType.Dummy));
        }
    }

    [Script] // 37594 - Greater Heal Refund
    class spell_pri_t5_heal_2p_bonus : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.ItemEfficiency);
        }

        bool CheckProc(ProcEventInfo eventInfo)
        {
            HealInfo healInfo = eventInfo.GetHealInfo();
            if (healInfo != null)
            {
                Unit healTarget = healInfo.GetTarget();
                if (healTarget)
                    // @todo: fix me later if (healInfo.GetEffectiveHeal())
                    if (healTarget.GetHealth() >= healTarget.GetMaxHealth())
                        return true;
            }

            return false;
        }

        void HandleProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            PreventDefaultAction();
            GetTarget().CastSpell(GetTarget(), SpellIds.ItemEfficiency, true, null, aurEff);
        }

        public override void Register()
        {
            DoCheckProc.Add(new CheckProcHandler(CheckProc));
            OnEffectProc.Add(new EffectProcHandler(HandleProc, 0, AuraType.ProcTriggerSpell));
        }
    }

    [Script] // 70770 - Item - Priest T10 Healer 2P Bonus
    class spell_pri_t10_heal_2p_bonus : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.BlessedHealing);
        }

        void HandleProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            PreventDefaultAction();

            HealInfo healInfo = eventInfo.GetHealInfo();
            if (healInfo == null || healInfo.GetHeal() == 0)
                return;

            SpellInfo spellInfo = Global.SpellMgr.GetSpellInfo(SpellIds.BlessedHealing, GetCastDifficulty());
            int amount = (int)MathFunctions.CalculatePct(healInfo.GetHeal(), aurEff.GetAmount());
            amount /= (int)spellInfo.GetMaxTicks();

            // Add remaining ticks to healing done
            Unit caster = eventInfo.GetActor();
            Unit target = eventInfo.GetProcTarget();
            amount += (int)target.GetRemainingPeriodicAmount(caster.GetGUID(), SpellIds.BlessedHealing, AuraType.PeriodicHeal);

            caster.CastCustomSpell(SpellIds.BlessedHealing, SpellValueMod.BasePoint0, amount, target, true, null, aurEff);
        }

        public override void Register()
        {
            OnEffectProc.Add(new EffectProcHandler(HandleProc, 0, AuraType.Dummy));
        }
    }

    // 15286 - Vampiric Embrace
    [Script]
    class spell_pri_vampiric_embrace : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.VampiricEmbraceHeal);
        }

        bool CheckProc(ProcEventInfo eventInfo)
        {
            // Not proc from Mind Sear
            return !eventInfo.GetDamageInfo().GetSpellInfo().SpellFamilyFlags[1].HasAnyFlag(0x80000u);
        }

        void HandleEffectProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            PreventDefaultAction();
            DamageInfo damageInfo = eventInfo.GetDamageInfo();
            if (damageInfo == null || damageInfo.GetDamage() == 0)
                return;

            int selfHeal = (int)MathFunctions.CalculatePct(damageInfo.GetDamage(), aurEff.GetAmount());
            int teamHeal = selfHeal / 2;

            GetTarget().CastCustomSpell(null, SpellIds.VampiricEmbraceHeal, teamHeal, selfHeal, 0, true, null, aurEff);
        }

        public override void Register()
        {
            DoCheckProc.Add(new CheckProcHandler(CheckProc));
            OnEffectProc.Add(new EffectProcHandler(HandleEffectProc, 0, AuraType.Dummy));
        }
    }

    // 15290 - Vampiric Embrace (heal)
    [Script]
    class spell_pri_vampiric_embrace_target : SpellScript
    {
        void FilterTargets(List<WorldObject> unitList)
        {
            unitList.Remove(GetCaster());
        }

        public override void Register()
        {
            OnObjectAreaTargetSelect.Add(new ObjectAreaTargetSelectHandler(FilterTargets, 0, Targets.UnitCasterAreaParty));
        }
    }

    // 34914 - Vampiric Touch
    [Script]
    class spell_pri_vampiric_touch : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.VampiricTouchDispel, SpellIds.GenReplenishment);
        }

        void HandleDispel(DispelInfo dispelInfo)
        {
            Unit caster = GetCaster();
            if (caster)
            {
                Unit target = GetUnitOwner();
                if (target)
                {
                    AuraEffect aurEff = GetEffect(1);
                    if (aurEff != null)
                    {
                        int damage = aurEff.GetAmount() * 8;
                        // backfire damage
                        caster.CastCustomSpell(target, SpellIds.VampiricTouchDispel, damage, 0, 0, true, null, aurEff);
                    }
                }
            }
        }

        bool CheckProc(ProcEventInfo eventInfo)
        {
            return eventInfo.GetProcTarget() == GetCaster();
        }

        void HandleEffectProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            PreventDefaultAction();
            eventInfo.GetProcTarget().CastSpell((Unit)null, SpellIds.GenReplenishment, true, null, aurEff);
        }

        public override void Register()
        {
            AfterDispel.Add(new AuraDispelHandler(HandleDispel));
            DoCheckProc.Add(new CheckProcHandler(CheckProc));
            OnEffectProc.Add(new EffectProcHandler(HandleEffectProc, 2, AuraType.Dummy));
        }
    }

    [Script] // 121536 - Angelic Feather talent
    class spell_pri_angelic_feather_trigger : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.AngelicFeatherAreatrigger);
        }

        void HandleEffectDummy(uint effIndex)
        {
            Position destPos = GetHitDest().GetPosition();
            float radius = GetEffectInfo().CalcRadius();

            // Caster is prioritary
            if (GetCaster().IsWithinDist2d(destPos, radius))
            {
                GetCaster().CastSpell(GetCaster(), SpellIds.AngelicFeatherAura, true);
            }
            else
            {
                SpellCastTargets targets = new SpellCastTargets();
                targets.SetDst(destPos);
                GetCaster().CastSpell(targets, Global.SpellMgr.GetSpellInfo(SpellIds.AngelicFeatherAreatrigger, GetCastDifficulty()), null);
            }
        }

        public override void Register()
        {
            OnEffectHit.Add(new EffectHandler(HandleEffectDummy, 0, SpellEffectName.Dummy));
        }
    }

    [Script] // Angelic Feather areatrigger - created by SPELL_PRIEST_ANGELIC_FEATHER_AREATRIGGER
    class areatrigger_pri_angelic_feather : AreaTriggerEntityScript
    {
        public areatrigger_pri_angelic_feather() : base("areatrigger_pri_angelic_feather") { }

        class areatrigger_pri_angelic_featherAI : AreaTriggerAI
        {
            public areatrigger_pri_angelic_featherAI(AreaTrigger areatrigger) : base(areatrigger) { }

            // Called when the AreaTrigger has just been initialized, just before added to map
            public override void OnInitialize()
            {
                Unit caster = at.GetCaster();
                if (caster)
                {
                    List<AreaTrigger> areaTriggers = caster.GetAreaTriggers(SpellIds.AngelicFeatherAreatrigger);

                    if (areaTriggers.Count >= 3)
                        areaTriggers.First().SetDuration(0);
                }
            }

            public override void OnUnitEnter(Unit unit)
            {
                Unit caster = at.GetCaster();
                if (caster)
                {
                    if (caster.IsFriendlyTo(unit))
                    {
                        // If target already has aura, increase duration to max 130% of initial duration
                        caster.CastSpell(unit, SpellIds.AngelicFeatherAura, true);
                        at.SetDuration(0);
                    }
                }
            }
        }

        public override AreaTriggerAI GetAI(AreaTrigger areatrigger)
        {
            return new areatrigger_pri_angelic_featherAI(areatrigger);
        }
    }
}