// Copyright (c) CypherCore <http://github.com/CypherCore> All rights reserved.
// Licensed under the GNU GENERAL PUBLIC LICENSE. See LICENSE file in the project root for full license information.

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

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 AtonementTriggeredPowerTrinity = 214206;
        public const uint Benediction = 193157;
        public const uint BlessedHealing = 70772;
        public const uint BodyAndSoul = 64129;
        public const uint BodyAndSoulSpeed = 65081;
        public const uint DarkReprimand = 400169;
        public const uint DarkReprimandChannelDamage = 373129;
        public const uint DarkReprimandChannelHealing = 400171;
        public const uint DarkReprimandDamage = 373130;
        public const uint DarkReprimandHealing = 400187;
        public const uint DivineBlessing = 40440;
        public const uint DivineService = 391233;
        public const uint DivineStarHoly = 110744;
        public const uint DivineStarShadow = 122121;
        public const uint DivineStarHolyDamage = 122128;
        public const uint DivineStarHolyHeal = 110745;
        public const uint DivineStarShadowDamage = 390845;
        public const uint DivineStarShadowHeal = 390981;
        public const uint DivineWrath = 40441;
        public const uint EmpoweredRenewHeal = 391359;
        public const uint FlashHeal = 2061;
        public const uint FocusedMending = 372354;
        public const uint GuardianSpiritHeal = 48153;
        public const uint HaloHoly = 120517;
        public const uint HaloShadow = 120644;
        public const uint HaloHolyDamage = 120696;
        public const uint HaloHolyHeal = 120692;
        public const uint HaloShadowDamage = 390964;
        public const uint HaloShadowHeal = 390971;
        public const uint Heal = 2060;
        public const uint HolyMendingHeal = 391156;
        public const uint HolyWordChastise = 88625;
        public const uint HolyWordSanctify = 34861;
        public const uint HolyWordSerenity = 2050;
        public const uint Holy101ClassSet2pChooser = 411097;
        public const uint ItemEfficiency = 37595;
        public const uint LeapOfFaithEffect = 92832;
        public const uint LevitateEffect = 111759;
        public const uint MasochismTalent = 193063;
        public const uint MasochismPeriodicHeal = 193065;
        public const uint MasteryGrace = 271534;
        public const uint MindBombStun = 226943;
        public const uint OracularHeal = 26170;
        public const uint Penance = 47540;
        public const uint PenanceChannelDamage = 47758;
        public const uint PenanceChannelHealing = 47757;
        public const uint PenanceDamage = 47666;
        public const uint SPELL_PRIEST_PENANCE_HEALING = 47750;
        public const uint PowerOfTheDarkSide = 198069;
        public const uint PowerOfTheDarkSideTint = 225795;
        public const uint PowerWordShield = 17;
        public const uint PowerWordSolaceEnergize = 129253;
        public const uint PrayerOfMendingAura = 41635;
        public const uint PrayerOfMendingHeal = 33110;
        public const uint PrayerOfMendingJump = 155793;
        public const uint PrayerOfHealing = 596;
        public const uint PurgeTheWicked = 204197;
        public const uint PurgeTheWickedDummy = 204215;
        public const uint PurgeTheWickedPeriodic = 204213;
        public const uint Rapture = 47536;
        public const uint Renew = 139;
        public const uint RenewedHope = 197469;
        public const uint RenewedHopeEffect = 197470;
        public const uint RevelInPurity = 373003;
        public const uint SayYourPrayers = 391186;
        public const uint ShadowMendDamage = 186439;
        public const uint ShadowMendPeriodicDummy = 187464;
        public const uint ShadowWordPain = 589;
        public const uint ShieldDisciplineEnergize = 47755;
        public const uint ShieldDisciplinePassive = 197045;
        public const uint SinsOfTheMany = 280398;
        public const uint Smite = 585;
        public const uint SpiritOfRedemption = 27827;
        public const uint StrengthOfSoul = 197535;
        public const uint StrengthOfSoulEffect = 197548;
        public const uint ThePenitentAura = 200347;
        public const uint Trinity = 214205;
        public const uint VampiricEmbraceHeal = 15290;
        public const uint VampiricTouchDispel = 64085;
        public const uint VoidShield = 199144;
        public const uint VoidShieldEffect = 199145;
        public const uint WeakenedSoul = 6788;

        public const uint GenReplenishment = 57669;
    }

    [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
            {
                CastSpellExtraArgs args = new(TriggerCastFlags.FullMask);
                args.CastDifficulty = GetCastDifficulty();
                GetCaster().CastSpell(destPos, SpellIds.AngelicFeatherAreatrigger, args);
            }
        }

        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 : AreaTriggerAI
    {
        public areatrigger_pri_angelic_feather(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);
                }
            }
        }
    }

    [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;

            CastSpellExtraArgs args = new(aurEff);
            args.AddSpellMod(SpellValueMod.BasePoint0, (int)MathFunctions.CalculatePct(healInfo.GetHeal(), 10));
            caster.CastSpell(caster, SpellIds.OracularHeal, args);
        }

        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();

        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.AtonementHeal, SpellIds.SinsOfTheMany)
            && ValidateSpellEffect((spellInfo.Id, 1), (SpellIds.SinsOfTheMany, 2));
        }

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

        void HandleProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            DamageInfo damageInfo = eventInfo.GetDamageInfo();
            CastSpellExtraArgs args = new(aurEff);
            args.AddSpellMod(SpellValueMod.BasePoint0, (int)MathFunctions.CalculatePct(damageInfo.GetDamage(), aurEff.GetAmount()));
            _appliedAtonements.RemoveAll(targetGuid =>
            {
                Unit target = Global.ObjAccessor.GetUnit(GetTarget(), targetGuid);
                if (target)
                {
                    if (target.GetExactDist(GetTarget()) < GetEffectInfo(1).CalcValue())
                        GetTarget().CastSpell(target, SpellIds.AtonementHeal, args);

                    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);

            UpdateSinsOfTheManyValue();
        }

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

            UpdateSinsOfTheManyValue();
        }

        void UpdateSinsOfTheManyValue()
        {
            // Note: the damage dimish starts at the 6th application as of 10.0.5.
            float[] damageByStack = { 40.0f, 40.0f, 40.0f, 40.0f, 40.0f, 35.0f, 30.0f, 25.0f, 20.0f, 15.0f, 11.0f, 8.0f, 5.0f, 4.0f, 3.0f, 2.5f, 2.0f, 1.5f, 1.25f, 1.0f };

            foreach (uint effectIndex in new[] { 0, 1, 2 })
            {
                AuraEffect sinOfTheMany = GetUnitOwner().GetAuraEffect(SpellIds.SinsOfTheMany, effectIndex);
                if (sinOfTheMany != null)
                    sinOfTheMany.ChangeAmount((int)damageByStack[Math.Min(_appliedAtonements.Count, damageByStack.Length - 1)]);
            }
        }
    }

    [Script] // 194384, 214206 - 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>();
                    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>();
                    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));
        }
    }

    [Script] // 204883 - Circle of Healing
    class spell_pri_circle_of_healing : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellEffect(spellInfo.Id, 1);
        }

        void FilterTargets(List<WorldObject> targets)
        {
            // Note: we must remove one since target is always chosen.
            uint maxTargets = (uint)(GetSpellInfo().GetEffect(1).CalcValue(GetCaster()) - 1);

            SelectRandomInjuredTargets(targets, maxTargets, true);

            Unit explicitTarget = GetExplTargetUnit();
            if (explicitTarget != null)
                targets.Insert(0, explicitTarget);
        }

        public override void Register()
        {
            OnObjectAreaTargetSelect.Add(new ObjectAreaTargetSelectHandler(FilterTargets, 0, Targets.UnitDestAreaAlly));
        }
    }
    
    [Script] // 64844 - Divine Hymn
    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));
        }
    }

    [Script] // 122121 - Divine Star (Shadow)
    class spell_pri_divine_star_shadow : SpellScript
    {
        void HandleHitTarget(uint effIndex)
        {
            Unit caster = GetCaster();

            if ((int)caster.GetPowerType() != GetEffectInfo().MiscValue)
                PreventHitDefaultEffect(effIndex);
        }

        public override void Register()
        {
            OnEffectHitTarget.Add(new EffectHandler(HandleHitTarget, 2, SpellEffectName.Energize));
        }
    }
    
    // 110744 - Divine Star (Holy)
    [Script] // 122121 - Divine Star (Shadow)
    class areatrigger_pri_divine_star : AreaTriggerAI
    {
        TaskScheduler _scheduler = new();
        Position _casterCurrentPosition = new();
        List<ObjectGuid> _affectedUnits = new();
        float _maxTravelDistance;

        public areatrigger_pri_divine_star(AreaTrigger areatrigger) : base(areatrigger) { }

        public override void OnInitialize()
        {
            SpellInfo spellInfo = Global.SpellMgr.GetSpellInfo(at.GetSpellId(), Difficulty.None);
            if (spellInfo == null)
                return;

            if (spellInfo.GetEffects().Count <= 1)
                return;

            Unit caster = at.GetCaster();
            if (caster == null)
                return;

            _casterCurrentPosition = caster.GetPosition();

            // Note: max. distance at which the Divine Star can travel to is EFFECT_1's BasePoints yards.
            _maxTravelDistance = (float)spellInfo.GetEffect(1).CalcValue(caster);

            Position destPos = _casterCurrentPosition;
            at.MovePositionToFirstCollision(destPos, _maxTravelDistance, 0.0f);

            PathGenerator firstPath = new(at);
            firstPath.CalculatePath(destPos.GetPositionX(), destPos.GetPositionY(), destPos.GetPositionZ(), false);

            Vector3 endPoint = firstPath.GetPath().Last();

            // Note: it takes 1000ms to reach EFFECT_1's BasePoints yards, so it takes (1000 / EFFECT_1's BasePoints)ms to run 1 yard.
            at.InitSplines(firstPath.GetPath(), (uint)(at.GetDistance(endPoint.X, endPoint.Y, endPoint.Z) * (float)(1000 / _maxTravelDistance)));

        }

        public override void OnUpdate(uint diff)
        {
            _scheduler.Update(diff);
        }

        public override void OnUnitEnter(Unit unit)
        {
            HandleUnitEnterExit(unit);
        }

        public override void OnUnitExit(Unit unit)
        {
            HandleUnitEnterExit(unit);
        }

        void HandleUnitEnterExit(Unit unit)
        {
            Unit caster = at.GetCaster();
            if (caster == null)
                return;

            if (_affectedUnits.Contains(unit.GetGUID()))
                return;

            CastSpellExtraArgs castSpellExtraArgs = new(TriggerCastFlags.IgnoreGCD | TriggerCastFlags.IgnoreCastInProgress);

            if (caster.IsValidAttackTarget(unit))
                caster.CastSpell(unit, at.GetSpellId() == SpellIds.DivineStarShadow ? SpellIds.DivineStarShadowDamage : SpellIds.DivineStarHolyDamage, castSpellExtraArgs);
            else if (caster.IsValidAssistTarget(unit))
                caster.CastSpell(unit, at.GetSpellId() == SpellIds.DivineStarShadow ? SpellIds.DivineStarShadowHeal : SpellIds.DivineStarHolyHeal, castSpellExtraArgs);

            _affectedUnits.Add(unit.GetGUID());
        }

        public override void OnDestinationReached()
        {
            Unit caster = at.GetCaster();
            if (caster == null)
                return;

            if (at.GetDistance(_casterCurrentPosition) > 0.05f)
            {
                _affectedUnits.Clear();

                ReturnToCaster();
            }
            else
                at.Remove();
        }

        void ReturnToCaster()
        {
            _scheduler.Schedule(TimeSpan.FromMilliseconds(0), task =>
                {
                    Unit caster = at.GetCaster();
                    if (caster == null)
                        return;

                    _casterCurrentPosition = caster.GetPosition();

                    Vector3[] returnSplinePoints = new Vector3[4];

                    returnSplinePoints[0] = at.GetPosition();
                    returnSplinePoints[1] = at.GetPosition();
                    returnSplinePoints[2] = caster.GetPosition();
                    returnSplinePoints[3] = caster.GetPosition();

                    at.InitSplines(returnSplinePoints, (uint)(at.GetDistance(caster) / _maxTravelDistance * 1000));

                    task.Repeat(TimeSpan.FromMilliseconds(250));

                });
        }
    }

    [Script] // 391339 - Empowered Renew
    class spell_pri_empowered_renew : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.Renew, SpellIds.EmpoweredRenewHeal)
                && ValidateSpellEffect(SpellIds.Renew, 0)
                && Global.SpellMgr.GetSpellInfo(SpellIds.Renew, Difficulty.None).GetEffect(0).IsAura(AuraType.PeriodicHeal);
        }

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

            SpellInfo renewSpellInfo = Global.SpellMgr.GetSpellInfo(SpellIds.Renew, GetCastDifficulty());
            SpellEffectInfo renewEffect = renewSpellInfo.GetEffect(0);
            int estimatedTotalHeal = (int)AuraEffect.CalculateEstimatedfTotalPeriodicAmount(caster, target, renewSpellInfo, renewEffect, renewEffect.CalcValue(caster), 1);
            int healAmount = MathFunctions.CalculatePct(estimatedTotalHeal, aurEff.GetAmount());

            caster.CastSpell(target, SpellIds.EmpoweredRenewHeal, new CastSpellExtraArgs(aurEff).AddSpellMod(SpellValueMod.BasePoint0, healAmount));
        }

        public override void Register()
        {
            OnEffectProc.Add(new EffectProcHandler(HandleProc, 0, AuraType.Dummy));
        }
    }
    
    [Script] // 47788 - Guardian Spirit
    class spell_pri_guardian_spirit : AuraScript
    {
        uint healPct;

        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.GuardianSpiritHeal) && ValidateSpellEffect(spellInfo.Id, 1);
        }

        public override bool Load()
        {
            healPct = (uint)GetEffectInfo(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);
            CastSpellExtraArgs args = new(TriggerCastFlags.FullMask);
            args.AddSpellMod(SpellValueMod.BasePoint0, healAmount);
            target.CastSpell(target, SpellIds.GuardianSpiritHeal, args);
            absorbAmount = dmgInfo.GetDamage();
        }

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

    [Script] // 120644 - Halo (Shadow)
    class spell_pri_halo_shadow : SpellScript
    {
        void HandleHitTarget(uint effIndex)
        {
            Unit caster = GetCaster();

            if ((int)caster.GetPowerType() != GetEffectInfo().MiscValue)
                PreventHitDefaultEffect(effIndex);
        }

        public override void Register()
        {
            OnEffectHitTarget.Add(new EffectHandler(HandleHitTarget, 1, SpellEffectName.Energize));
        }
    }
    
    // 120517 - Halo (Holy)
    [Script] // 120644 - Halo (Shadow)
    class areatrigger_pri_halo : AreaTriggerAI
    {
        public areatrigger_pri_halo(AreaTrigger areatrigger) : base(areatrigger) { }

        public override void OnUnitEnter(Unit unit)
        {
            Unit caster = at.GetCaster();
            if (caster != null)
            {
                if (caster.IsValidAttackTarget(unit))
                    caster.CastSpell(unit, at.GetSpellId() == SpellIds.HaloShadow ? SpellIds.HaloShadowDamage : SpellIds.HaloHolyDamage,
                        new CastSpellExtraArgs(TriggerCastFlags.IgnoreGCD | TriggerCastFlags.IgnoreCastInProgress));
                else if (caster.IsValidAssistTarget(unit))
                    caster.CastSpell(unit, at.GetSpellId() == SpellIds.HaloShadow ? SpellIds.HaloShadowHeal : SpellIds.HaloHolyHeal,
                        new CastSpellExtraArgs(TriggerCastFlags.IgnoreGCD | TriggerCastFlags.IgnoreCastInProgress));
            }
        }
    }

    [Script] // 391154 - Holy Mending
    class spell_pri_holy_mending : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.Renew, SpellIds.HolyMendingHeal);
        }

        bool CheckProc(AuraEffect aurEff, ProcEventInfo procInfo)
        {
            return procInfo.GetProcTarget().HasAura(SpellIds.Renew, procInfo.GetActor().GetGUID());
        }

        void HandleProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            eventInfo.GetActor().CastSpell(eventInfo.GetProcTarget(), SpellIds.HolyMendingHeal, new CastSpellExtraArgs(aurEff));
        }

        public override void Register()
        {
            DoCheckEffectProc.Add(new CheckEffectProcHandler(CheckProc, 0, AuraType.ProcTriggerSpell));
            OnEffectProc.Add(new EffectProcHandler(HandleProc, 0, AuraType.ProcTriggerSpell));
        }
    }
    
    [Script] // 63733 - Holy Words
    class spell_pri_holy_words : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.Heal, SpellIds.FlashHeal, SpellIds.PrayerOfHealing, SpellIds.Renew, SpellIds.Smite, SpellIds.HolyWordChastise, SpellIds.HolyWordSanctify, SpellIds.HolyWordSerenity)
                && ValidateSpellEffect((SpellIds.HolyWordSerenity, 1), (SpellIds.HolyWordSanctify, 3), (SpellIds.HolyWordChastise, 1));
        }

        void HandleProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            SpellInfo spellInfo = eventInfo.GetSpellInfo();
            if (spellInfo == null)
                return;

            uint targetSpellId;
            uint cdReductionEffIndex;
            switch (spellInfo.Id)
            {
                case SpellIds.Heal:
                case SpellIds.FlashHeal: // reduce Holy Word: Serenity cd by 6 seconds
                    targetSpellId = SpellIds.HolyWordSerenity;
                    cdReductionEffIndex = 1;
                    // cdReduction = sSpellMgr.GetSpellInfo(SPELL_PRIEST_HOLY_WORD_SERENITY, GetCastDifficulty()).GetEffect(EFFECT_1).CalcValue(player);
                    break;
                case SpellIds.PrayerOfHealing: // reduce Holy Word: Sanctify cd by 6 seconds
                    targetSpellId = SpellIds.HolyWordSanctify;
                    cdReductionEffIndex = 2;
                    break;
                case SpellIds.Renew: // reuce Holy Word: Sanctify cd by 2 seconds
                    targetSpellId = SpellIds.HolyWordSanctify;
                    cdReductionEffIndex = 3;
                    break;
                case SpellIds.Smite: // reduce Holy Word: Chastise cd by 4 seconds
                    targetSpellId = SpellIds.HolyWordChastise;
                    cdReductionEffIndex = 1;
                    break;
                default:
                    Log.outWarn(LogFilter.Spells, $"HolyWords aura has been proced by an unknown spell: {GetSpellInfo().Id}");
                    return;
            }

            SpellInfo targetSpellInfo = Global.SpellMgr.GetSpellInfo(targetSpellId, GetCastDifficulty());
            int cdReduction = targetSpellInfo.GetEffect(cdReductionEffIndex).CalcValue(GetTarget());
            GetTarget().GetSpellHistory().ModifyCooldown(targetSpellInfo, TimeSpan.FromSeconds(-cdReduction), true);
        }

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

    [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));
        }
    }

    [Script] // 92833 - Leap of Faith
    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();
            targets.SetDst(destPos);
            targets.SetUnitTarget(GetCaster());
            GetHitUnit().CastSpell(targets, (uint)GetEffectValue(), new CastSpellExtraArgs(GetCastDifficulty()));
        }

        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));
        }
    }

    [Script] // 205369 - Mind Bomb
    class spell_pri_mind_bomb : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.MindBombStun);
        }

        void RemoveEffect(AuraEffect aurEff, AuraEffectHandleModes mode)
        {
            if (GetTargetApplication().GetRemoveMode() == AuraRemoveMode.Death || GetTargetApplication().GetRemoveMode() == AuraRemoveMode.Expire)
                GetCaster()?.CastSpell(GetTarget().GetPosition(), SpellIds.MindBombStun, new CastSpellExtraArgs(true));
        }

        public override void Register()
        {
            AfterEffectRemove.Add(new EffectApplyHandler(RemoveEffect, 0, AuraType.Dummy, AuraEffectHandleModes.Real));
        }
    }

    [Script] // 390686 - Painful Punishment
    class spell_pri_painful_punishment : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.ShadowWordPain, SpellIds.PurgeTheWickedPeriodic);
        }

        void HandleEffectProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            Unit caster = eventInfo.GetActor();
            Unit target = eventInfo.GetActionTarget();
            if (caster == null || target == null)
                return;

            int additionalDuration = aurEff.GetAmount();

            Aura shadowWordPain = target.GetOwnedAura(SpellIds.ShadowWordPain, caster.GetGUID());
            if (shadowWordPain != null)
                shadowWordPain.SetDuration(shadowWordPain.GetDuration() + additionalDuration);

            Aura purgeTheWicked = target.GetOwnedAura(SpellIds.PurgeTheWickedPeriodic, caster.GetGUID());
            if (purgeTheWicked != null)
                purgeTheWicked.SetDuration(purgeTheWicked.GetDuration() + additionalDuration);
        }

        public override void Register()
        {
            OnEffectProc.Add(new EffectProcHandler(HandleEffectProc, 0, AuraType.Dummy));
        }
    }
    
    [Script("spell_pri_penance", SpellIds.PenanceChannelDamage, SpellIds.PenanceChannelHealing)] // 47540 - Penance
    [Script("spell_pri_dark_reprimand", SpellIds.DarkReprimandChannelDamage, SpellIds.DarkReprimandChannelHealing)] // 400169 - Dark Reprimand
    class spell_pri_penance : SpellScript
    {
        uint _damageSpellId;
        uint _healingSpellId;

        public spell_pri_penance(uint damageSpellId, uint healingSpellId)
        {
            _damageSpellId = damageSpellId;
            _healingSpellId = healingSpellId;
        }

        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(_damageSpellId, _healingSpellId);
        }

        SpellCastResult CheckCast()
        {
            Unit caster = GetCaster();

            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;
        }

        void HandleDummy(uint effIndex)
        {
            Unit caster = GetCaster();

            Unit target = GetHitUnit();
            if (target)
            {
                if (caster.IsFriendlyTo(target))
                    caster.CastSpell(target, _healingSpellId, new CastSpellExtraArgs(TriggerCastFlags.IgnoreGCD | TriggerCastFlags.IgnoreSpellAndCategoryCD).SetTriggeringSpell(GetSpell()));
                else
                    caster.CastSpell(target, _damageSpellId, new CastSpellExtraArgs(TriggerCastFlags.IgnoreGCD | TriggerCastFlags.IgnoreSpellAndCategoryCD).SetTriggeringSpell(GetSpell()));
            }
        }

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

    // 47758 - Penance (Channel Damage), 47757 - Penance (Channel Healing)
    [Script] // 373129 - Dark Reprimand (Channel Damage), 400171 - Dark Reprimand (Channel Healing)
    class spell_pri_penance_or_dark_reprimand_channeled : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PowerOfTheDarkSide);
        }

        void HandleOnRemove(AuraEffect aurEff, AuraEffectHandleModes mode)
        {
            Unit caster = GetCaster();
            if (caster != null)
                caster.RemoveAura(SpellIds.PowerOfTheDarkSide);
        }

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

    [Script] // 198069 - Power of the Dark Side
    class spell_pri_power_of_the_dark_side : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PowerOfTheDarkSideTint);
        }

        void HandleOnApply(AuraEffect aurEff, AuraEffectHandleModes mode)
        {
            Unit caster = GetCaster();
            if (caster != null)
                caster.CastSpell(caster, SpellIds.PowerOfTheDarkSideTint, true);
        }

        void HandleOnRemove(AuraEffect aurEff, AuraEffectHandleModes mode)
        {
            Unit caster = GetCaster();
            if (caster != null)
                caster.RemoveAura(SpellIds.PowerOfTheDarkSideTint);
        }

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

    // 47666 - Penance (Damage)
    [Script] // 373130 - Dark Reprimand (Damage)
    class spell_pri_power_of_the_dark_side_damage_bonus : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PowerOfTheDarkSide);
        }

        void CalculateDamageBonus(Unit victim, ref int damage, ref int flatMod, ref float pctMod)
        {
            AuraEffect powerOfTheDarkSide = GetCaster().GetAuraEffect(SpellIds.PowerOfTheDarkSide, 0);
            if (powerOfTheDarkSide != null)
                MathFunctions.AddPct(ref pctMod, powerOfTheDarkSide.GetAmount());
        }

        public override void Register()
        {
            CalcDamage.Add(new DamageAndHealingCalcHandler(CalculateDamageBonus));
        }
    }

    // 47750 - Penance (Healing)
    [Script] // 400187 - Dark Reprimand (Healing)
    class spell_pri_power_of_the_dark_side_healing_bonus : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PowerOfTheDarkSide);
        }

        void CalculateHealingBonus(Unit victim, ref int damage, ref int flatMod, ref float pctMod)
        {
            AuraEffect powerOfTheDarkSide = GetCaster().GetAuraEffect(SpellIds.PowerOfTheDarkSide, 0);
            if (powerOfTheDarkSide != null)
                MathFunctions.AddPct(ref pctMod, powerOfTheDarkSide.GetAmount());
        }

        public override void Register()
        {
            CalcHealing.Add(new DamageAndHealingCalcHandler(CalculateHealingBonus));
        }
    }
    
    [Script] // 194509 - Power Word: Radiance
    class spell_pri_power_word_radiance : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.Atonement, SpellIds.AtonementTriggered, SpellIds.Trinity) && ValidateSpellEffect(spellInfo.Id, 3);
        }

        void OnTargetSelect(List<WorldObject> targets)
        {
            uint maxTargets = (uint)(GetEffectInfo(2).CalcValue(GetCaster()) + 1); // adding 1 for explicit target unit
            if (targets.Count > maxTargets)
            {
                Unit explTarget = GetExplTargetUnit();

                // Sort targets so units with no atonement are first, then units who are injured, then oher units
                // Make sure explicit target unit is first
                targets.Sort((lhs, rhs) =>
                {
                    if (lhs == explTarget) // explTarget > anything: always true
                        return 1;
                    if (rhs == explTarget) // anything > explTarget: always false
                        return -1;

                    return MakeSortTuple(lhs).Equals(MakeSortTuple(rhs)) ? 1 : -1;
                });

                targets.Resize(maxTargets);
            }
        }

        void HandleEffectHitTarget(uint effIndex)
        {
            Unit caster = GetCaster();
            if (caster.HasAura(SpellIds.Trinity))
                return;

            int durationPct = GetEffectInfo(3).CalcValue(caster);
            if (caster.HasAura(SpellIds.Atonement))
                caster.CastSpell(GetHitUnit(), SpellIds.AtonementTriggered, new CastSpellExtraArgs(SpellValueMod.DurationPct, durationPct).SetTriggerFlags(TriggerCastFlags.FullMask));
        }

        public override void Register()
        {
            OnObjectAreaTargetSelect.Add(new ObjectAreaTargetSelectHandler(OnTargetSelect, 1, Targets.UnitDestAreaAlly));
            OnEffectHitTarget.Add(new EffectHandler(HandleEffectHitTarget, 1, SpellEffectName.Heal));
        }

        Tuple<bool, bool> MakeSortTuple(WorldObject obj)
        {
            return Tuple.Create(IsUnitWithNoAtonement(obj), IsUnitInjured(obj));
        }

        // Returns true if obj is a unit but has no atonement
        bool IsUnitWithNoAtonement(WorldObject obj)
        {
            Unit unit = obj.ToUnit();
            return unit != null && !unit.HasAura(SpellIds.AtonementTriggered, GetCaster().GetGUID());
        }

        // Returns true if obj is a unit and is injured
        static bool IsUnitInjured(WorldObject obj)
        {
            Unit unit = obj.ToUnit();
            return unit != null && unit.IsFullHealth();
        }
    }

    [Script] // 17 - Power Word: Shield
    class spell_pri_power_word_shield : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.WeakenedSoul);
        }

        SpellCastResult CheckCast()
        {
            Unit caster = GetCaster();
            Unit target = GetExplTargetUnit();
            if (target != null)
                if (!caster.HasAura(SpellIds.Rapture))
                    if (target.HasAura(SpellIds.WeakenedSoul, caster.GetGUID()))
                        return SpellCastResult.BadTargets;

            return SpellCastResult.SpellCastOk;
        }

        void HandleEffectHit()
        {
            Unit caster = GetCaster();
            Unit target = GetHitUnit();
            if (target != null)
                if (!caster.HasAura(SpellIds.Rapture))
                    caster.CastSpell(target, SpellIds.WeakenedSoul, true);
        }

        public override void Register()
        {
            OnCheckCast.Add(new CheckCastHandler(CheckCast));
            AfterHit.Add(new HitHandler(HandleEffectHit));
        }
    }

    [Script] // 17 - Power Word: Shield Aura
    class spell_pri_power_word_shield_aura : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.BodyAndSoul, SpellIds.BodyAndSoulSpeed, SpellIds.StrengthOfSoul, SpellIds.StrengthOfSoulEffect, SpellIds.RenewedHope, SpellIds.RenewedHopeEffect,
                SpellIds.VoidShield, SpellIds.VoidShieldEffect, SpellIds.Atonement, SpellIds.Trinity, SpellIds.AtonementTriggered, SpellIds.AtonementTriggeredPowerTrinity, SpellIds.ShieldDisciplinePassive,
                SpellIds.ShieldDisciplineEnergize, SpellIds.Rapture, SpellIds.MasteryGrace);
        }

        void CalculateAmount(AuraEffect auraEffect, ref int amount, ref bool canBeRecalculated)
        {
            canBeRecalculated = false;

            Unit caster = GetCaster();
            if (caster != null)
            {
                float amountF = caster.SpellBaseDamageBonusDone(GetSpellInfo().GetSchoolMask()) * 1.65f;

                Player player = caster.ToPlayer();
                if (player != null)
                {
                    MathFunctions.AddPct(ref amountF, player.GetRatingBonusValue(CombatRating.VersatilityDamageDone));

                    AuraEffect mastery = caster.GetAuraEffect(SpellIds.MasteryGrace, 0);
                    if (mastery != null)
                        if (GetUnitOwner().HasAura(SpellIds.AtonementTriggered) || GetUnitOwner().HasAura(SpellIds.AtonementTriggeredPowerTrinity))
                            MathFunctions.AddPct(ref amountF, mastery.GetAmount());
                }

                AuraEffect rapture = caster.GetAuraEffect(SpellIds.Rapture, 1);
                if (rapture != null)
                    MathFunctions.AddPct(ref amountF, rapture.GetAmount());

                amount = (int)amountF;
            }
        }

        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, caster.HasAura(SpellIds.Trinity) ? SpellIds.AtonementTriggeredPowerTrinity : 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] // 129250 - Power Word: Solace
    class spell_pri_power_word_solace : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PowerWordSolaceEnergize);
        }

        void RestoreMana(uint effIndex)
        {
            GetCaster().CastSpell(GetCaster(), SpellIds.PowerWordSolaceEnergize,
                new CastSpellExtraArgs(TriggerCastFlags.IgnoreCastInProgress).SetTriggeringSpell(GetSpell())
                    .AddSpellMod(SpellValueMod.BasePoint0, GetEffectValue() / 100));
        }

        public override void Register()
        {
            OnEffectLaunch.Add(new EffectHandler(RestoreMana, 1, SpellEffectName.Dummy));
        }
    }
    // 33076 - Prayer of Mending (Dummy)
    [Script] // 411097 - Priest Holy 10.1 Class Set 2pc (Chooser)
    class spell_pri_prayer_of_mending_dummy : SpellScript
    {
        SpellInfo _spellInfoHeal;
        SpellEffectInfo _healEffectDummy;

        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PrayerOfMendingHeal, SpellIds.PrayerOfMendingAura)
                && ValidateSpellEffect(SpellIds.PrayerOfMendingHeal, 0);
        }

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

        void FilterTargets(List<WorldObject> targets)
        {
            SelectRandomInjuredTargets(targets, 1, true);
        }

        void HandleEffectDummy(uint effIndex)
        {
            // Note: we need to increase BasePoints by 1 since it's 4 as default.
            uint basePoints = (uint)GetCaster().SpellHealingBonusDone(GetHitUnit(), _spellInfoHeal, _healEffectDummy.CalcValue(GetCaster()), DamageEffectType.Heal, _healEffectDummy);
            CastSpellExtraArgs args = new(TriggerCastFlags.FullMask);
            args.AddSpellMod(SpellValueMod.AuraStack, GetEffectValue());
            args.AddSpellMod(SpellValueMod.BasePoint0, (int)basePoints);
            args.SetCustomArg(true);
            GetCaster().CastSpell(GetHitUnit(), SpellIds.PrayerOfMendingAura, args);
        }

        public override void Register()
        {
            if (m_scriptSpellId == SpellIds.Holy101ClassSet2pChooser)
                OnObjectAreaTargetSelect.Add(new ObjectAreaTargetSelectHandler(FilterTargets, 0, Targets.UnitDestAreaEntry));
            OnEffectHitTarget.Add(new EffectHandler(HandleEffectDummy, 0, SpellEffectName.Dummy));
        }
    }

    [Script] // 41635 - Prayer of Mending (Aura)
    class spell_pri_prayer_of_mending_AuraScript : AuraScript
    {
        bool _isEmpoweredByFocusedMending;

        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PrayerOfMendingHeal, SpellIds.PrayerOfMendingJump, SpellIds.SayYourPrayers) && ValidateSpellEffect(SpellIds.SayYourPrayers, 0);
        }

        void HandleHeal(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            // Note: caster is the priest who cast the spell and target is current holder of the aura.
            Unit target = GetTarget();
            Unit caster = GetCaster();
            if (caster != null)
            {
                CastSpellExtraArgs args = new(aurEff);
                args.SetCustomArg(_isEmpoweredByFocusedMending);

                caster.CastSpell(target, SpellIds.PrayerOfMendingHeal, args);

                // Note: jump is only executed if higher than 1 stack.
                int stackAmount = GetStackAmount();
                if (stackAmount > 1)
                {
                    args.OriginalCaster = caster.GetGUID();

                    int newStackAmount = stackAmount - 1;
                    AuraEffect sayYourPrayers = caster.GetAuraEffect(SpellIds.SayYourPrayers, 0);
                    if (sayYourPrayers != null)
                        if (RandomHelper.randChance(sayYourPrayers.GetAmount()))
                            ++newStackAmount;

                    args.AddSpellMod(SpellValueMod.BasePoint0, newStackAmount);

                    target.CastSpell(target, SpellIds.PrayerOfMendingJump, args);
                }

                Remove();
            }
        }

        public void SetEmpoweredByFocusedMending(bool isEmpowered)
        {
            _isEmpoweredByFocusedMending = isEmpowered;
        }

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

    [Script]
    class spell_pri_prayer_of_mending : SpellScript
    {
        void HandleEffectDummy(uint effIndex)
        {
            Aura aura = GetHitAura();
            if (aura == null)
                return;

            spell_pri_prayer_of_mending_AuraScript script = aura.GetScript<spell_pri_prayer_of_mending_AuraScript>();
            if (script == null)
                return;

            bool isEmpoweredByFocusedMending = (bool)GetSpell().m_customArg;
            if (isEmpoweredByFocusedMending)
                script.SetEmpoweredByFocusedMending(isEmpoweredByFocusedMending);
        }

        public override void Register()
        {
            OnEffectHitTarget.Add(new EffectHandler(HandleEffectDummy, 0, SpellEffectName.ApplyAura));
        }
    }
    
    [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 FilterTargets(List<WorldObject> targets)
        {
            // Note: priority list is a) players b) non-player units. Also, this spell became smartheal in WoD.
            SelectRandomInjuredTargets(targets, 1, true);
        }

        void HandleJump(uint effIndex)
        {
            Unit origCaster = GetOriginalCaster();
            Unit target = GetHitUnit();

            if (origCaster != null)
            {
                uint basePoints = (uint)origCaster.SpellHealingBonusDone(target, _spellInfoHeal, _healEffectDummy.CalcValue(origCaster), DamageEffectType.Heal, _healEffectDummy);
                CastSpellExtraArgs args = new(TriggerCastFlags.FullMask);
                args.AddSpellMod(SpellValueMod.AuraStack, GetEffectValue());
                args.AddSpellMod(SpellValueMod.BasePoint0, (int)basePoints);
                args.SetCustomArg(false);
                origCaster.CastSpell(target, SpellIds.PrayerOfMendingAura, args);
            }
        }

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

    // 33110 - Prayer of Mending (Heal)
    class spell_pri_prayer_of_mending_heal : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.Renew, SpellIds.PrayerOfMendingAura) && ValidateSpellEffect((SpellIds.Benediction, 0), (SpellIds.FocusedMending, 0), (SpellIds.DivineService, 0));
        }

        void HandleEffectHitTarget(uint effIndex)
        {
            Unit caster = GetCaster();
            Unit target = GetHitUnit();

            AuraEffect benediction = caster.GetAuraEffect(SpellIds.Benediction, 0);
            if (benediction != null)
                if (RandomHelper.randChance(benediction.GetAmount()))
                    caster.CastSpell(target, SpellIds.Renew, new CastSpellExtraArgs(TriggerCastFlags.IgnoreGCD | TriggerCastFlags.IgnoreCastInProgress));

            float healBonus = 1.0f;

            AuraEffect focusedMending = caster.GetAuraEffect(SpellIds.FocusedMending, 0);
            if (focusedMending != null)
            {
                bool isEmpoweredByFocusedMending = (bool)GetSpell().m_customArg;

                if (isEmpoweredByFocusedMending && isEmpoweredByFocusedMending)
                    MathFunctions.AddPct(ref healBonus, focusedMending.GetAmount());
            }

            AuraEffect divineService = caster.GetAuraEffect(SpellIds.DivineService, 0);
            if (divineService != null)
            {
                Aura prayerOfMending = target.GetAura(SpellIds.PrayerOfMendingAura, caster.GetGUID());
                if (prayerOfMending != null)
                    MathFunctions.AddPct(ref healBonus, (int)(divineService.GetAmount() * prayerOfMending.GetStackAmount()));
            }

            SetHitHeal((int)(GetHitHeal() * healBonus));
        }

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

    [Script] // 405554 - Priest Holy 10.1 Class Set 2pc
    class spell_pri_holy_10_1_class_set_2pc : AuraScript
    {
        bool CheckProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            return RandomHelper.randChance(aurEff.GetAmount());
        }

        void HandleProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            GetTarget().CastSpell(GetTarget(), SpellIds.Holy101ClassSet2pChooser,
                new CastSpellExtraArgs(TriggerCastFlags.IgnoreCastInProgress | TriggerCastFlags.IgnoreSpellAndCategoryCD)
                .SetTriggeringSpell(eventInfo.GetProcSpell()));
        }

        public override void Register()
        {
            DoCheckEffectProc.Add(new CheckEffectProcHandler(CheckProc, 0, AuraType.Dummy));
            OnEffectProc.Add(new EffectProcHandler(HandleProc, 0, AuraType.Dummy));
        }
    }
    
    // 204197 - Purge the Wicked
    [Script] // Called by Penance - 47540, Dark Reprimand - 400169
    class spell_pri_purge_the_wicked : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PurgeTheWickedPeriodic, SpellIds.PurgeTheWickedDummy);
        }

        void HandleDummy(uint effIndex)
        {
            Unit caster = GetCaster();
            Unit target = GetHitUnit();

            if (target.HasAura(SpellIds.PurgeTheWickedPeriodic, caster.GetGUID()))
                caster.CastSpell(target, SpellIds.PurgeTheWickedDummy, new CastSpellExtraArgs(TriggerCastFlags.IgnoreGCD | TriggerCastFlags.IgnoreCastInProgress));
        }

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

    [Script] // 204215 - Purge the Wicked
    class spell_pri_purge_the_wicked_dummy : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.PurgeTheWickedPeriodic, SpellIds.RevelInPurity)
                && ValidateSpellEffect(SpellIds.RevelInPurity, 1);
        }

        void FilterTargets(List<WorldObject> targets)
        {
            Unit caster = GetCaster();
            Unit explTarget = GetExplTargetUnit();

            targets.RemoveAll(obj =>
            {
                // Note: we must remove any non-unit target, the explicit target and any other target that may be under any crowd control aura.
                Unit target = obj.ToUnit();
                return !target || target == explTarget || target.HasBreakableByDamageCrowdControlAura();
            });

            if (targets.Empty())
                return;

            // Note: there's no SPELL_EFFECT_DUMMY with BasePoints 1 in any of the spells related to use as reference so we hardcode the value.
            uint spreadCount = 1;

            //     Less than zero –x is less than y.
            //     Zero –x equals y.
            //     Greater than zero –x is greater than y.

            // Note: we must sort our list of targets whose priority is 1) aura, 2) distance, and 3) duration.
            targets.Sort((lhs, rhs) =>
            {
                Unit targetA = lhs.ToUnit();
                Unit targetB = rhs.ToUnit();

                Aura auraA = targetA.GetAura(SpellIds.PurgeTheWickedPeriodic, caster.GetGUID());
                Aura auraB = targetB.GetAura(SpellIds.PurgeTheWickedPeriodic, caster.GetGUID());

                if (auraA == null)
                {
                    if (auraB != null)
                        return 1;
                    return explTarget.GetExactDist(targetA).CompareTo(explTarget.GetExactDist(targetB));
                }
                if (auraB == null)
                    return -1;

                return auraA.GetDuration().CompareTo(auraB.GetDuration());
            });

            // Note: Revel in Purity talent.
            if (caster.HasAura(SpellIds.RevelInPurity))
                spreadCount += (uint)Global.SpellMgr.GetSpellInfo(SpellIds.RevelInPurity, Difficulty.None)?.GetEffect(1).CalcValue(GetCaster());

            if (targets.Count > spreadCount)
                targets.Resize(spreadCount);
        }

        void HandleDummy(uint effIndex)
        {
            Unit caster = GetCaster();
            Unit target = GetHitUnit();

            caster.CastSpell(target, SpellIds.PurgeTheWickedPeriodic, new CastSpellExtraArgs(TriggerCastFlags.IgnoreGCD | TriggerCastFlags.IgnoreCastInProgress));
        }

        public override void Register()
        {
            OnObjectAreaTargetSelect.Add(new ObjectAreaTargetSelectHandler(FilterTargets, 1, Targets.UnitDestAreaEnemy));
            OnEffectHitTarget.Add(new EffectHandler(HandleDummy, 1, SpellEffectName.Dummy));
        }
    }
    
    [Script] // 47536 - Rapture
    class spell_pri_rapture : SpellScript
    {
        ObjectGuid _raptureTarget;

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

        void HandleEffectDummy(uint effIndex)
        {
            _raptureTarget = GetHitUnit().GetGUID();
        }

        void HandleAfterCast()
        {
            Unit caster = GetCaster();
            Unit target = Global.ObjAccessor.GetUnit(caster, _raptureTarget);
            if (target != null)
                caster.CastSpell(target, SpellIds.PowerWordShield, new CastSpellExtraArgs(TriggerCastFlags.IgnoreGCD | TriggerCastFlags.IgnorePowerAndReagentCost | TriggerCastFlags.IgnoreCastInProgress).SetTriggeringSpell(GetSpell()));
        }

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

    [Script] // 280391 - Sins of the Many
    class spell_pri_sins_of_the_many : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.SinsOfTheMany);
        }

        void HandleOnApply(AuraEffect aurEff, AuraEffectHandleModes mode)
        {
            GetTarget().CastSpell(GetTarget(), SpellIds.SinsOfTheMany, true);
        }

        void HandleOnRemove(AuraEffect aurEff, AuraEffectHandleModes mode)
        {
            GetTarget().RemoveAura(SpellIds.SinsOfTheMany);
        }

        public override void Register()
        {
            OnEffectApply.Add(new EffectApplyHandler(HandleOnApply, 0, AuraType.Dummy, AuraEffectHandleModes.Real));
            OnEffectRemove.Add(new EffectApplyHandler(HandleOnRemove, 0, AuraType.Dummy, AuraEffectHandleModes.Real));
        }
    }
    
    [Script] // 20711 - Spirit of Redemption
    class spell_pri_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();
            target.CastSpell(target, SpellIds.SpiritOfRedemption, new CastSpellExtraArgs(aurEff));
            target.SetFullHealth();
        }

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

    [Script] // 186263 - Shadow Mend
    class spell_pri_shadow_mend : SpellScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.Atonement, SpellIds.AtonementTriggered, SpellIds.Trinity, SpellIds.MasochismTalent, SpellIds.MasochismPeriodicHeal, SpellIds.ShadowMendPeriodicDummy);
        }

        void HandleEffectHit()
        {
            Unit target = GetHitUnit();
            if (target != null)
            {
                Unit caster = GetCaster();

                int periodicAmount = GetHitHeal() / 20;
                int damageForAuraRemoveAmount = periodicAmount * 10;
                if (caster.HasAura(SpellIds.Atonement) && !caster.HasAura(SpellIds.Trinity))
                    caster.CastSpell(target, SpellIds.AtonementTriggered, new CastSpellExtraArgs(GetSpell()));

                // Handle Masochism talent
                if (caster.HasAura(SpellIds.MasochismTalent) && caster.GetGUID() == target.GetGUID())
                    caster.CastSpell(caster, SpellIds.MasochismPeriodicHeal, new CastSpellExtraArgs(GetSpell()).AddSpellMod(SpellValueMod.BasePoint0, periodicAmount));
                else if (target.IsInCombat() && periodicAmount != 0)
                {
                    CastSpellExtraArgs args = new(TriggerCastFlags.FullMask);
                    args.SetTriggeringSpell(GetSpell());
                    args.AddSpellMod(SpellValueMod.BasePoint0, periodicAmount);
                    args.AddSpellMod(SpellValueMod.BasePoint1, damageForAuraRemoveAmount);
                    caster.CastSpell(target, SpellIds.ShadowMendPeriodicDummy, args);
                }
            }
        }

        public override void Register()
        {
            AfterHit.Add(new HitHandler(HandleEffectHit));
        }
    }

    [Script] // 187464 - Shadow Mend (Damage)
    class spell_pri_shadow_mend_periodic_damage : AuraScript
    {
        public override bool Validate(SpellInfo spellInfo)
        {
            return ValidateSpellInfo(SpellIds.ShadowMendDamage);
        }

        void HandleDummyTick(AuraEffect aurEff)
        {
            CastSpellExtraArgs args = new(TriggerCastFlags.FullMask);
            args.SetOriginalCaster(GetCasterGUID());
            args.SetTriggeringAura(aurEff);
            args.AddSpellMod(SpellValueMod.BasePoint0, aurEff.GetAmount());
            GetTarget().CastSpell(GetTarget(), SpellIds.ShadowMendDamage, args);
        }

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

        void HandleProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            int newAmount = (int)(aurEff.GetAmount() - eventInfo.GetDamageInfo().GetDamage());

            aurEff.ChangeAmount(newAmount);
            if (newAmount < 0)
                Remove();
        }

        public override void Register()
        {
            OnEffectPeriodic.Add(new EffectPeriodicHandler(HandleDummyTick, 0, AuraType.PeriodicDummy));
            DoCheckProc.Add(new CheckProcHandler(CheckProc));
            OnEffectProc.Add(new EffectProcHandler(HandleProc, 1, AuraType.Dummy));
        }
    }
    
    [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, new CastSpellExtraArgs(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, new CastSpellExtraArgs(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();

            Unit caster = eventInfo.GetActor();
            Unit target = eventInfo.GetProcTarget();

            CastSpellExtraArgs args = new(aurEff);
            args.AddSpellMod(SpellValueMod.BasePoint0, amount);
            caster.CastSpell(target, SpellIds.BlessedHealing, args);
        }

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

    // 109142 - Twist of Fate (Shadow)
    [Script] // 265259 - Twist of Fate (Discipline)
    class spell_pri_twist_of_fate : AuraScript
    {
        bool CheckProc(AuraEffect aurEff, ProcEventInfo eventInfo)
        {
            return eventInfo.GetProcTarget().GetHealthPct() < aurEff.GetAmount();
        }

        public override void Register()
        {
            DoCheckEffectProc.Add(new CheckEffectProcHandler(CheckProc, 0, AuraType.ProcTriggerSpell));
        }
    }
    
    [Script] // 15286 - Vampiric Embrace
    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;

            CastSpellExtraArgs args = new(aurEff);
            args.AddSpellMod(SpellValueMod.BasePoint0, teamHeal);
            args.AddSpellMod(SpellValueMod.BasePoint1, selfHeal);
            GetTarget().CastSpell((Unit)null, SpellIds.VampiricEmbraceHeal, args);
        }

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

    [Script] // 15290 - Vampiric Embrace (heal)
    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));
        }
    }

    [Script] // 34914 - Vampiric Touch
    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)
                    {
                        // backfire damage
                        CastSpellExtraArgs args = new(aurEff);
                        args.AddSpellMod(SpellValueMod.BasePoint0, aurEff.GetAmount() * 8);
                        caster.CastSpell(target, SpellIds.VampiricTouchDispel, args);
                    }
                }
            }
        }

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

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

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