wwdpublic/Content.Server/_Goobstation/Changeling/ChangelingSystem.Abilities.cs

using Content.Server.Light.Components;
using Content.Server.Nutrition.Components;
using Content.Server.Objectives.Components;
using Content.Server.Radio.Components;
using Content.Shared.Changeling;
using Content.Shared.Chemistry.Components;
using Content.Shared.Chemistry.Components.SolutionManager;
using Content.Shared.Chemistry.Reagent;
using Content.Shared.Cuffs.Components;
using Content.Shared.Damage;
using Content.Shared.Damage.Components;
using Content.Shared.Damage.Prototypes;
using Content.Shared.DoAfter;
using Content.Shared.FixedPoint;
using Content.Shared.IdentityManagement;
using Content.Shared.Mobs;
using Content.Shared.Store.Components;
using Content.Shared.Popups;
using Robust.Shared.Prototypes;
using Content.Shared.Movement.Pulling.Components;
using Content.Shared.Stealth.Components;
using Content.Shared._Goobstation.Weapons.AmmoSelector;
using Content.Shared.Actions;
using Content.Shared.Movement.Pulling.Systems;
using Content.Shared.Overlays.Switchable;
using Robust.Shared.Utility;
using Robust.Shared.Physics.Components;
using Content.Shared.Mobs.Systems;
using Content.Server.Chat;
using Content.Shared.Chat;
using Content.Server.GameTicking;

namespace Content.Server.Changeling;

public sealed partial class ChangelingSystem
{
    public void SubscribeAbilities()
    {
        SubscribeLocalEvent<ChangelingComponent, OpenEvolutionMenuEvent>(OnOpenEvolutionMenu);
        SubscribeLocalEvent<ChangelingComponent, AbsorbDNAEvent>(OnAbsorb);
        // WD EDIT START
        SubscribeLocalEvent<ChangelingComponent, AbsorbDNADoAfterFirstEvent>(OnFirstAbsorbDoAfter);
        SubscribeLocalEvent<ChangelingComponent, AbsorbDNADoAfterSecondEvent>(OnSecondAbsorbDoAfter);
        SubscribeLocalEvent<ChangelingComponent, AbsorbDNADoAfterThirdEvent>(OnThirdAbsorbDoAfter);
        // WD EDIT END
        SubscribeLocalEvent<ChangelingComponent, ChangelingInfectTargetEvent>(OnInfect);
        SubscribeLocalEvent<ChangelingComponent, ChangelingInfectTargetDoAfterEvent>(OnInfectDoAfter);
        SubscribeLocalEvent<ChangelingComponent, StingExtractDNAEvent>(OnStingExtractDNA);
        SubscribeLocalEvent<ChangelingComponent, ChangelingTransformCycleEvent>(OnTransformCycle);
        SubscribeLocalEvent<ChangelingComponent, ChangelingTransformEvent>(OnTransform);
        SubscribeLocalEvent<ChangelingComponent, EnterStasisEvent>(OnEnterStasis);
        SubscribeLocalEvent<GhostAttemptHandleEvent>(OnGhostAttempt); // WWDP EDIT
        SubscribeLocalEvent<ChangelingComponent, ExitStasisEvent>(OnExitStasis);

        SubscribeLocalEvent<ChangelingComponent, ToggleArmbladeEvent>(OnToggleArmblade);
        SubscribeLocalEvent<ChangelingComponent, ToggleArmHammerEvent>(OnToggleHammer);
        SubscribeLocalEvent<ChangelingComponent, ToggleArmClawEvent>(OnToggleClaw);
        SubscribeLocalEvent<ChangelingComponent, ToggleDartGunEvent>(OnToggleDartGun);
        SubscribeLocalEvent<ChangelingComponent, CreateBoneShardEvent>(OnCreateBoneShard);
        SubscribeLocalEvent<ChangelingComponent, ToggleChitinousArmorEvent>(OnToggleArmor);
        SubscribeLocalEvent<ChangelingComponent, ToggleOrganicShieldEvent>(OnToggleShield);
        SubscribeLocalEvent<ChangelingComponent, ShriekDissonantEvent>(OnShriekDissonant);
        SubscribeLocalEvent<ChangelingComponent, ShriekResonantEvent>(OnShriekResonant);
        SubscribeLocalEvent<ChangelingComponent, ToggleStrainedMusclesEvent>(OnToggleStrainedMuscles);

        SubscribeLocalEvent<ChangelingComponent, StingReagentEvent>(OnStingReagent);
        SubscribeLocalEvent<ChangelingComponent, StingTransformEvent>(OnStingTransform);
        SubscribeLocalEvent<ChangelingComponent, StingFakeArmbladeEvent>(OnStingFakeArmblade);
        SubscribeLocalEvent<ChangelingComponent, StingLayEggsEvent>(OnLayEgg);

        SubscribeLocalEvent<ChangelingComponent, ActionAnatomicPanaceaEvent>(OnAnatomicPanacea);
        SubscribeLocalEvent<ChangelingComponent, ActionBiodegradeEvent>(OnBiodegrade);
        SubscribeLocalEvent<ChangelingComponent, ActionChameleonSkinEvent>(OnChameleonSkin);
        SubscribeLocalEvent<ChangelingComponent, ActionEphedrineOverdoseEvent>(OnEphedrineOverdose);
        SubscribeLocalEvent<ChangelingComponent, ActionFleshmendEvent>(OnHealUltraSwag);
        SubscribeLocalEvent<ChangelingComponent, ActionLastResortEvent>(OnLastResort);
        SubscribeLocalEvent<ChangelingComponent, ActionLesserFormEvent>(OnLesserForm);
        SubscribeLocalEvent<ChangelingComponent, ActionSpacesuitEvent>(OnSpacesuit);
        SubscribeLocalEvent<ChangelingComponent, ActionHivemindAccessEvent>(OnHivemindAccess);
        SubscribeLocalEvent<ChangelingComponent, AbsorbBiomatterEvent>(OnAbsorbBiomatter);
        SubscribeLocalEvent<ChangelingComponent, AbsorbBiomatterDoAfterEvent>(OnAbsorbBiomatterDoAfter);
    }

    #region Basic Abilities

    private void OnOpenEvolutionMenu(EntityUid uid, ChangelingComponent comp, ref OpenEvolutionMenuEvent args)
    {
        if (!TryComp(uid, out StoreComponent? store))
            return;

        _store.ToggleUi(uid, uid, store);
    }

    private void OnAbsorb(EntityUid uid, ChangelingComponent comp, ref AbsorbDNAEvent args)
    {
        var target = args.Target;

        if (!IsIncapacitated(target))
        {
            _popup.PopupEntity(Loc.GetString(comp.AbsorbFailIncapacitated), uid, uid);
            return;
        }
        if (HasComp<AbsorbedComponent>(target))
        {
            _popup.PopupEntity(Loc.GetString(comp.AbsorbFailAbsorbed), uid, uid);
            return;
        }
        if (!HasComp<AbsorbableComponent>(target))
        {
            _popup.PopupEntity(Loc.GetString(comp.AbsorbFailUnabsorbable), uid, uid);
            return;
        }
        if (TryComp<PullableComponent>(target, out var pullable)) // Agressive grab check
        {
            if (pullable.GrabStage <= GrabStage.Soft)
            {
                _popup.PopupEntity(Loc.GetString(comp.AbsorbFailNoGrab), uid, uid);
                return;
            }
        }

        if (!TryUseAbility(uid, comp, args))
            return;

        _popup.PopupEntity(Loc.GetString(comp.AbsorbStart), uid, uid); // WD EDIT
        //PlayMeatySound(uid, comp); // WWDP EDIT
        var dargs = new DoAfterArgs(EntityManager, uid, comp.AbsorbTime, new AbsorbDNADoAfterFirstEvent(), uid, target)
        {
            DistanceThreshold = 1.5f,
            BreakOnDamage = false, // WWDP EDIT
            BreakOnHandChange = false,
            BreakOnMove = true,
            BreakOnWeightlessMove = true,
            AttemptFrequency = AttemptFrequency.StartAndEnd,
            MultiplyDelay = false,
        };
        _doAfter.TryStartDoAfter(dargs);
    }

    /// <summary>
    ///     This number is based on the "Average Human" constant mass, with the desired target that succ'ing an average human
    //      should give the same number of evolution points as before (2 points).
    /// </summary>
    private const float SuccMassRatio = 30f;

    /// <summary>
    ///     This number is based on the "Average Human" constant mass, with the desired target that succ'ing an average human
    ///     should give the same number of chemicals as before (7 points).
    /// </summary>
    private const float SuccChemicalsRatio = 7f;

    // WWDP EDIT START
    // todo: consider moving this bullshit to a whole another system just for handling chained doafters like these.
    private void OnFirstAbsorbDoAfter(EntityUid uid, ChangelingComponent comp, ref AbsorbDNADoAfterFirstEvent args)
    {
        if (args.Cancelled || args.Args.Target is not EntityUid target
            || !_proto.TryIndex<DamageTypePrototype>(comp.AbsorbedDamageType, out var damageProto))
            return;

        if (!IsIncapacitated(target))
        {
            _popup.PopupEntity(Loc.GetString(comp.AbsorbFailIncapacitated), uid, uid);
            return;
        }
        if (HasComp<AbsorbedComponent>(target))
        {
            _popup.PopupEntity(Loc.GetString(comp.AbsorbFailAbsorbed), uid, uid);
            return;
        }

        var dargs = new DoAfterArgs(EntityManager, uid, comp.AbsorbTime, new AbsorbDNADoAfterSecondEvent(), uid, target)
        {
            DistanceThreshold = 1.5f,
            BreakOnDamage = false,
            BreakOnHandChange = false,
            BreakOnMove = true,
            BreakOnWeightlessMove = true,
            AttemptFrequency = AttemptFrequency.StartAndEnd,
            MultiplyDelay = false,
        };
        var popupOthers = Loc.GetString(comp.AbsorbPopupFirst, ("user", Identity.Entity(uid, EntityManager)), ("target", Identity.Entity(target, EntityManager)));
        _popup.PopupEntity(popupOthers, uid, comp.AbsorbPopupType);
        _doAfter.TryStartDoAfter(dargs);
    }

    private void OnSecondAbsorbDoAfter(EntityUid uid, ChangelingComponent comp, ref AbsorbDNADoAfterSecondEvent args)
    {
        if (args.Cancelled || args.Args.Target is not EntityUid target
            || !_proto.TryIndex<DamageTypePrototype>(comp.AbsorbedDamageType, out var damageProto))
            return;

        if (!IsIncapacitated(target))
        {
            _popup.PopupEntity(Loc.GetString(comp.AbsorbFailIncapacitated), uid, uid);
            return;
        }
        if (HasComp<AbsorbedComponent>(target))
        {
            _popup.PopupEntity(Loc.GetString(comp.AbsorbFailAbsorbed), uid, uid);
            return;
        }

        var dargs = new DoAfterArgs(EntityManager, uid, comp.AbsorbTime, new AbsorbDNADoAfterThirdEvent(), uid, target)
        {
            DistanceThreshold = 1.5f,
            BreakOnDamage = false,
            BreakOnHandChange = false,
            BreakOnMove = true,
            BreakOnWeightlessMove = true,
            AttemptFrequency = AttemptFrequency.StartAndEnd,
            MultiplyDelay = false,
        };
        var popupOthers = Loc.GetString(comp.AbsorbPopupSecond, ("user", Identity.Entity(uid, EntityManager)), ("target", Identity.Entity(target, EntityManager)));
        _popup.PopupEntity(popupOthers, uid, comp.AbsorbPopupType);
        _doAfter.TryStartDoAfter(dargs);
    }
    // WWDP EDIT END

    private void OnThirdAbsorbDoAfter(EntityUid uid, ChangelingComponent comp, ref AbsorbDNADoAfterThirdEvent args) // WWDP EDIT
    {
        if (args.Args.Target is null
            || !_proto.TryIndex<DamageTypePrototype>(comp.AbsorbedDamageType, out var damageProto))
            return;

        var target = args.Args.Target.Value;

        if (args.Cancelled || !IsIncapacitated(target) || HasComp<AbsorbedComponent>(target)
            || !TryComp(target, out DamageableComponent? damageable)
            || !TryComp(target, out PhysicsComponent? physicsComponent) || physicsComponent.Mass <= 0)
            return;

        if (!_mobThreshold.TryGetThresholdForState(target, MobState.Dead, out var deadThreshold) || deadThreshold is null || deadThreshold <= 0)
        {
            DebugTools.Assert($"entity {MetaData(target).EntityPrototype} has an Absorbable component, but does not also have a dead threshold. Double check if it's intended or not that changelings can SUCC them. Are they a robot?");
            return;
        }

        var dmg = new DamageSpecifier(damageProto, deadThreshold!.Value.Int());
        var dmgTotal = _damage.TryChangeDamage(target, dmg, false, damageable: damageable, origin: uid);
        if (dmgTotal is null || !dmgTotal.AnyPositive())
            return;

        _blood.ChangeBloodReagent(target, comp.AbsorbedBloodReagent);
        _blood.SpillAllSolutions(target);
        PlayMeatySound(args.User, comp);

        EnsureComp<AbsorbedComponent>(target);

        var popup = Loc.GetString("changeling-absorb-end-self-ling");
        var bonusChemicals = 0f;
        var bonusEvolutionPoints = 0f;
        var massToSucc = Math.Max((int) (physicsComponent.Mass / SuccMassRatio), 1); // WOE UPON THE CREW IF A CHANGELING SUCCS A LAMIA.
        if (TryComp<ChangelingComponent>(target, out var targetComp))
        {
            bonusChemicals += targetComp.MaxChemicals / 2;
            bonusEvolutionPoints += targetComp.TotalEvolutionPoints; // SURVIVAL OF THE FITTEST.
            comp.TotalEvolutionPoints += targetComp.TotalEvolutionPoints + massToSucc;
        }
        else
        {
            popup = Loc.GetString("changeling-absorb-end-self");
            bonusChemicals += physicsComponent.Mass / SuccChemicalsRatio;
            bonusEvolutionPoints += massToSucc;
            comp.TotalEvolutionPoints += massToSucc;
        }
        TryStealDNA(uid, target, comp, true);
        comp.TotalAbsorbedEntities++;
        // WD EDIT START
        var popupOthers = Loc.GetString(comp.AbsorbPopupThird, ("user", Identity.Entity(uid, EntityManager)), ("target", Identity.Entity(target, EntityManager)));
        _popup.PopupEntity(popupOthers, uid, comp.AbsorbPopupType);
        // WD EDIT END
        _popup.PopupEntity(popup, args.User, args.User);
        comp.MaxChemicals += bonusChemicals;

        if (TryComp<StoreComponent>(args.User, out var store))
        {
            _store.TryAddCurrency(new Dictionary<string, FixedPoint2> { { "EvolutionPoint", bonusEvolutionPoints } }, args.User, store);
            _store.UpdateUserInterface(args.User, args.User, store);
        }

        if (_mind.TryGetMind(uid, out var mindId, out var mind))
            if (_mind.TryGetObjectiveComp<AbsorbConditionComponent>(mindId, out var objective, mind))
                objective.Absorbed += 1;
    }

    private void OnInfect(EntityUid uid, ChangelingComponent comp, ref ChangelingInfectTargetEvent args)
    {
        var target = args.Target;

        if (!IsIncapacitated(target))
        {
            _popup.PopupEntity(Loc.GetString("changeling-convert-fail-incapacitated"), uid, uid);
            return;
        }
        if (HasComp<ChangelingInfectionComponent>(target))
        {
            _popup.PopupEntity(Loc.GetString("changeling-convert-fail-already"), uid, uid);
            return;
        }
        if (!HasComp<AbsorbableComponent>(target))
        {
            _popup.PopupEntity(Loc.GetString("changeling-convert-fail-incompatible"), uid, uid);
            return;
        }

        if (!TryUseAbility(uid, comp, args))
            return;

        var popupOthers = Loc.GetString("changeling-convert-start", ("user", Identity.Entity(uid, EntityManager)), ("target", Identity.Entity(target, EntityManager)));
        _popup.PopupEntity(popupOthers, uid, PopupType.LargeCaution);
        PlayMeatySound(uid, comp);
        var dargs = new DoAfterArgs(EntityManager, uid, TimeSpan.FromSeconds(30), new ChangelingInfectTargetDoAfterEvent(), uid, target)
        {
            DistanceThreshold = 1.5f,
            BreakOnDamage = true,
            BreakOnHandChange = false,
            BreakOnMove = true,
            BreakOnWeightlessMove = true,
            AttemptFrequency = AttemptFrequency.StartAndEnd
        };
        _doAfter.TryStartDoAfter(dargs);
    }
    private void OnInfectDoAfter(EntityUid uid, ChangelingComponent comp, ref ChangelingInfectTargetDoAfterEvent args)
    {
        if (args.Args.Target == null)
            return;

        var target = args.Args.Target.Value;

        if (args.Cancelled || !IsIncapacitated(target) || HasComp<ChangelingInfectionComponent>(target))
            return;

        if (TryComp<ChangelingComponent>(target, out var targetComp))
        {
            var popupOther = Loc.GetString("changeling-convert-end-immune", ("target", Identity.Entity(target, EntityManager)));
            _popup.PopupEntity(popupOther, args.User, args.User, PopupType.LargeCaution);
            return;
        }

        PlayMeatySound(args.User, comp);

        EnsureComp<ChangelingInfectionComponent>(target);

        var popup = Loc.GetString("changeling-convert-end", ("target", Identity.Entity(target, EntityManager)));
        _popup.PopupEntity(popup, args.User, args.User, PopupType.Medium);

        var popupTwo = Loc.GetString("changeling-convert-end-warning", ("user", Identity.Entity(uid, EntityManager)));
        _popup.PopupEntity(popupTwo, target, target, PopupType.LargeCaution);
    }

    public List<ProtoId<ReagentPrototype>> BiomassAbsorbedChemicals = new() { "Nutriment", "Protein", "UncookedAnimalProteins", "Fat" }; // fat so absorbing raw meat good
    private void OnAbsorbBiomatter(EntityUid uid, ChangelingComponent comp, ref AbsorbBiomatterEvent args)
    {
        var target = args.Target;

        if (!TryUseAbility(uid, comp, args))
            return;

        if (!TryComp<FoodComponent>(target, out var food))
            return;

        if (!TryComp<SolutionContainerManagerComponent>(target, out var solMan))
            return;

        var totalFood = FixedPoint2.New(0);
        foreach (var (_, sol) in _solution.EnumerateSolutions((target, solMan)))
            foreach (var proto in BiomassAbsorbedChemicals)
                totalFood += sol.Comp.Solution.GetTotalPrototypeQuantity(proto);

        if (food.RequiresSpecialDigestion || totalFood == 0) // no eating winter coats or food that won't give you anything
        {
            var popup = Loc.GetString("changeling-absorbbiomatter-bad-food");
            _popup.PopupEntity(popup, uid, uid);
            return;
        }

        var popupOthers = Loc.GetString("changeling-absorbbiomatter-start", ("user", Identity.Entity(uid, EntityManager)));
        _popup.PopupEntity(popupOthers, uid, PopupType.MediumCaution);
        PlayMeatySound(uid, comp);
        // so you can't just instantly mukbang a bag of food mid-combat, 2.7s for raw meat
        var dargs = new DoAfterArgs(EntityManager, uid, TimeSpan.FromSeconds(totalFood.Float() * 0.15f), new AbsorbBiomatterDoAfterEvent(), uid, target)
        {
            DistanceThreshold = 1.5f,
            BreakOnDamage = true,
            BreakOnHandChange = false,
            BreakOnMove = true,
            BreakOnWeightlessMove = true,
            DuplicateCondition = DuplicateConditions.SameEvent,
            AttemptFrequency = AttemptFrequency.StartAndEnd
        };
        _doAfter.TryStartDoAfter(dargs);
    }
    private void OnAbsorbBiomatterDoAfter(EntityUid uid, ChangelingComponent comp, ref AbsorbBiomatterDoAfterEvent args)
    {
        if (args.Args.Target == null)
            return;

        var target = args.Args.Target.Value;

        if (args.Cancelled)
            return;

        if (!TryComp<SolutionContainerManagerComponent>(target, out var solMan))
            return;

        var totalFood = FixedPoint2.New(0);
        foreach (var (name, sol) in _solution.EnumerateSolutions((target, solMan)))
        {
            var solution = sol.Comp.Solution;
            foreach (var proto in BiomassAbsorbedChemicals)
            {
                var quant = solution.GetTotalPrototypeQuantity(proto);
                totalFood += quant;
                solution.RemoveReagent(proto, quant);
            }
            _puddle.TrySpillAt(target, solution, out var _);
        }

        UpdateChemicals(uid, comp, totalFood.Float() * 2); // 36 for raw meat

        QueueDel(target); // eaten
    }

    private void OnStingExtractDNA(EntityUid uid, ChangelingComponent comp, ref StingExtractDNAEvent args)
    {
        if (!TrySting(uid, comp, args, true))
            return;

        var target = args.Target;
        if (!TryStealDNA(uid, target, comp, true))
        {
            _popup.PopupEntity(Loc.GetString("changeling-sting-extract-fail"), uid, uid);
            // royal cashback
            comp.Chemicals += Comp<ChangelingActionComponent>(args.Action).ChemicalCost;
        }
        else _popup.PopupEntity(Loc.GetString("changeling-sting", ("target", Identity.Entity(target, EntityManager))), uid, uid);
    }

    private void OnTransformCycle(EntityUid uid, ChangelingComponent comp, ref ChangelingTransformCycleEvent args)
    {
        comp.AbsorbedDNAIndex += 1;
        if (comp.AbsorbedDNAIndex >= comp.MaxAbsorbedDNA || comp.AbsorbedDNAIndex >= comp.AbsorbedDNA.Count)
            comp.AbsorbedDNAIndex = 0;

        if (comp.AbsorbedDNA.Count == 0)
        {
            _popup.PopupEntity(Loc.GetString("changeling-transform-cycle-empty"), uid, uid);
            return;
        }

        var selected = comp.AbsorbedDNA.ToArray()[comp.AbsorbedDNAIndex];
        comp.SelectedForm = selected;
        _popup.PopupEntity(Loc.GetString("changeling-transform-cycle", ("target", selected.Name)), uid, uid);
    }
    private void OnTransform(EntityUid uid, ChangelingComponent comp, ref ChangelingTransformEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        if (!TryTransform(uid, comp))
            comp.Chemicals += Comp<ChangelingActionComponent>(args.Action).ChemicalCost;
    }

    private void OnEnterStasis(EntityUid uid, ChangelingComponent comp, ref EnterStasisEvent args)
    {
        if (comp.IsInStasis || HasComp<AbsorbedComponent>(uid) || !TryComp<DamageableComponent>(uid, out var damageable)) // WWDP EDIT
        {
            _popup.PopupEntity(Loc.GetString("changeling-stasis-enter-fail"), uid, uid);
            return;
        }

        if (!TryUseAbility(uid, comp, args))
            return;

        comp.Chemicals = 0f;

        if (_mobState.IsAlive(uid))
        {
            // fake our death
            var othersMessage = Loc.GetString("suicide-command-default-text-others", ("name", uid));
            _popup.PopupEntity(othersMessage, uid, Robust.Shared.Player.Filter.PvsExcept(uid), true);

            var selfMessage = Loc.GetString("changeling-stasis-enter");
            _popup.PopupEntity(selfMessage, uid, uid);
        }

        comp.IsInStasis = true;
        _suicide.ApplyLethalDamage(new(uid, damageable), "Asphyxiation"); // WWDP EDIT
    }

    // WWDP EDIT START
    private void OnGhostAttempt(GhostAttemptHandleEvent args)
    {
        if(TryComp<ChangelingComponent>(args.Mind.CurrentEntity, out var comp) && comp.IsInStasis)
        {
            args.Handled = true;
            args.Result = false;
        }
    }
    // WWDP EDIT END

    private void OnExitStasis(EntityUid uid, ChangelingComponent comp, ref ExitStasisEvent args)
    {
        if (!comp.IsInStasis)
        {
            _popup.PopupEntity(Loc.GetString("changeling-stasis-exit-fail"), uid, uid);
            return;
        }
        if (HasComp<AbsorbedComponent>(uid))
        {
            _popup.PopupEntity(Loc.GetString("changeling-stasis-exit-fail-dead"), uid, uid);
            return;
        }

        if (!TryUseAbility(uid, comp, args))
            return;

        if (!TryComp<DamageableComponent>(uid, out var damageable))
            return;

        // heal of everything
        _rejuv.PerformRejuvenate(uid);

        _popup.PopupEntity(Loc.GetString("changeling-stasis-exit"), uid, uid);

        comp.IsInStasis = false;
    }

    #endregion

    #region Combat Abilities

    private void OnToggleArmblade(EntityUid uid, ChangelingComponent comp, ref ToggleArmbladeEvent args)
    {
        if (!TryUseAbility(uid, comp, args, GetEquipmentChemCostOverride(comp, ArmbladePrototype)))
            return;

        if (!TryToggleItem(uid, ArmbladePrototype, comp, out _))
            return;

        PlayMeatySound(uid, comp);
    }
    private void OnToggleHammer(EntityUid uid, ChangelingComponent comp, ref ToggleArmHammerEvent args)
    {
        if (!TryUseAbility(uid, comp, args, GetEquipmentChemCostOverride(comp, HammerPrototype)))
            return;

        if (!TryToggleItem(uid, HammerPrototype, comp, out _))
            return;

        PlayMeatySound(uid, comp);
    }
    private void OnToggleClaw(EntityUid uid, ChangelingComponent comp, ref ToggleArmClawEvent args)
    {
        if (!TryUseAbility(uid, comp, args, GetEquipmentChemCostOverride(comp, ClawPrototype)))
            return;

        if (!TryToggleItem(uid, ClawPrototype, comp, out _))
            return;

        PlayMeatySound(uid, comp);
    }
    private void OnToggleDartGun(EntityUid uid, ChangelingComponent comp, ref ToggleDartGunEvent args)
    {
        var chemCostOverride = GetEquipmentChemCostOverride(comp, DartGunPrototype);

        if (!TryUseAbility(uid, comp, args, chemCostOverride))
            return;

        if (!TryToggleItem(uid, DartGunPrototype, comp, out var dartgun))
            return;

        if (!TryComp(dartgun, out AmmoSelectorComponent? ammoSelector))
        {
            PlayMeatySound(uid, comp);
            return;
        }

        if (!_mind.TryGetMind(uid, out var mindId, out _) || !TryComp(mindId, out ActionsContainerComponent? container))
            return;

        var setProto = false;
        foreach (var ability in container.Container.ContainedEntities)
        {
            if (!TryComp(ability, out ChangelingReagentStingComponent? sting) || sting.DartGunAmmo == null)
                continue;

            ammoSelector.Prototypes.Add(sting.DartGunAmmo.Value);

            if (setProto)
                continue;

            _selectableAmmo.TrySetProto((dartgun.Value, ammoSelector), sting.DartGunAmmo.Value);
            setProto = true;
        }

        if (ammoSelector.Prototypes.Count == 0)
        {
            comp.Chemicals += chemCostOverride ?? Comp<ChangelingActionComponent>(args.Action).ChemicalCost;
            _popup.PopupEntity(Loc.GetString("changeling-dartgun-no-stings"), uid, uid);
            comp.Equipment.Remove(DartGunPrototype);
            QueueDel(dartgun.Value);
            return;
        }

        Dirty(dartgun.Value, ammoSelector);

        PlayMeatySound(uid, comp);
    }
    private void OnCreateBoneShard(EntityUid uid, ChangelingComponent comp, ref CreateBoneShardEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        var star = Spawn(BoneShardPrototype, Transform(uid).Coordinates);
        _hands.TryPickupAnyHand(uid, star);

        PlayMeatySound(uid, comp);
    }
    private void OnToggleArmor(EntityUid uid, ChangelingComponent comp, ref ToggleChitinousArmorEvent args)
    {
        float? chemCostOverride = comp.ActiveArmor == null ? null : 0f;

        if (!TryUseAbility(uid, comp, args, chemCostOverride))
            return;

        if (!TryToggleArmor(uid, comp, [(ArmorHelmetPrototype, "head"), (ArmorPrototype, "outerClothing")]))
        {
            _popup.PopupEntity(Loc.GetString("changeling-equip-armor-fail"), uid, uid);
            comp.Chemicals += chemCostOverride ?? Comp<ChangelingActionComponent>(args.Action).ChemicalCost;
            return;
        }

        PlayMeatySound(uid, comp);
    }
    private void OnToggleShield(EntityUid uid, ChangelingComponent comp, ref ToggleOrganicShieldEvent args)
    {
        if (!TryUseAbility(uid, comp, args, GetEquipmentChemCostOverride(comp, ShieldPrototype)))
            return;

        if (!TryToggleItem(uid, ShieldPrototype, comp, out _))
            return;

        PlayMeatySound(uid, comp);
    }
    private void OnShriekDissonant(EntityUid uid, ChangelingComponent comp, ref ShriekDissonantEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        DoScreech(uid, comp);

        var pos = _transform.GetMapCoordinates(uid);
        var power = comp.ShriekPower;
        _emp.EmpPulse(pos, power, 5000f, power * 2);
    }
    private void OnShriekResonant(EntityUid uid, ChangelingComponent comp, ref ShriekResonantEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        DoScreech(uid, comp);

        var power = comp.ShriekPower;
        _flash.FlashArea(uid, uid, power, power * 2f * 1000f);

        var lookup = _lookup.GetEntitiesInRange(uid, power);
        var lights = GetEntityQuery<PoweredLightComponent>();

        foreach (var ent in lookup)
            if (lights.HasComponent(ent))
                _light.TryDestroyBulb(ent);
    }
    private void OnToggleStrainedMuscles(EntityUid uid, ChangelingComponent comp, ref ToggleStrainedMusclesEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        ToggleStrainedMuscles(uid, comp);
    }
    private void ToggleStrainedMuscles(EntityUid uid, ChangelingComponent comp)
    {
        if (!comp.StrainedMusclesActive)
        {
            _popup.PopupEntity(Loc.GetString("changeling-muscles-start"), uid, uid);
            comp.StrainedMusclesActive = true;
        }
        else
        {
            _popup.PopupEntity(Loc.GetString("changeling-muscles-end"), uid, uid);
            comp.StrainedMusclesActive = false;
        }

        PlayMeatySound(uid, comp);
        _speed.RefreshMovementSpeedModifiers(uid);
    }

    #endregion

    #region Stings

    private void OnStingReagent(EntityUid uid, ChangelingComponent comp, StingReagentEvent args)
    {
        TryReagentSting(uid, comp, args);
    }
    private void OnStingTransform(EntityUid uid, ChangelingComponent comp, ref StingTransformEvent args)
    {
        if (!TrySting(uid, comp, args, true))
            return;

        var target = args.Target;
        if (!TryTransform(target, comp, true, true))
            comp.Chemicals += Comp<ChangelingActionComponent>(args.Action).ChemicalCost;
    }
    private void OnStingFakeArmblade(EntityUid uid, ChangelingComponent comp, ref StingFakeArmbladeEvent args)
    {
        if (!TrySting(uid, comp, args))
            return;

        var target = args.Target;
        var fakeArmblade = EntityManager.SpawnEntity(FakeArmbladePrototype, Transform(target).Coordinates);
        if (!_hands.TryPickupAnyHand(target, fakeArmblade))
        {
            QueueDel(fakeArmblade);
            comp.Chemicals += Comp<ChangelingActionComponent>(args.Action).ChemicalCost;
            _popup.PopupEntity(Loc.GetString("changeling-sting-fail-simplemob"), uid, uid);
            return;
        }

        PlayMeatySound(target, comp);
    }
    public void OnLayEgg(EntityUid uid, ChangelingComponent comp, ref StingLayEggsEvent args)
    {
        var target = args.Target;

        if (!_proto.TryIndex<DamageTypePrototype>(comp.AbsorbedDamageType, out var damageProto)
            || !TryComp(target, out DamageableComponent? damageable))
            return;

        if (!_mobState.IsDead(target))
        {
            _popup.PopupEntity(Loc.GetString("changeling-absorb-fail-incapacitated"), uid, uid);
            return;
        }
        if (HasComp<AbsorbedComponent>(target))
        {
            _popup.PopupEntity(Loc.GetString("changeling-absorb-fail-absorbed"), uid, uid);
            return;
        }
        if (!HasComp<AbsorbableComponent>(target))
        {
            _popup.PopupEntity(Loc.GetString("changeling-absorb-fail-unabsorbable"), uid, uid);
            return;
        }

        if (!_mobThreshold.TryGetThresholdForState(target, MobState.Dead, out var deadThreshold) || deadThreshold is null || deadThreshold <= 0)
        {
            DebugTools.Assert($"entity {MetaData(target).EntityPrototype} has an Absorbable component, but does not also have a dead threshold. Double check if it's intended or not that changelings can SUCC them. Are they a robot?");
            return;
        }

        var mind = _mind.GetMind(uid);
        if (mind == null)
            return;
        if (!TryComp<StoreComponent>(uid, out var storeComp))
            return;

        var dmg = new DamageSpecifier(damageProto, deadThreshold!.Value.Int());
        var dmgTotal = _damage.TryChangeDamage(target, dmg, false, damageable: damageable, origin: uid);
        if (dmgTotal is null || !dmgTotal.AnyPositive())
            return;

        comp.IsInLastResort = false;
        comp.IsInLesserForm = true;

        var eggComp = EnsureComp<ChangelingEggComponent>(target);
        eggComp.LingComp = comp;
        eggComp.LingMind = (EntityUid) mind;
        eggComp.LingStore = _serialization.CreateCopy(storeComp, notNullableOverride: true);
        eggComp.AugmentedEyesightPurchased = HasComp<ThermalVisionComponent>(uid);

        EnsureComp<AbsorbedComponent>(target);
        _blood.ChangeBloodReagent(target, comp.AbsorbedBloodReagent);
        _blood.SpillAllSolutions(target);

        PlayMeatySound(uid, comp);

        _bodySystem.GibBody(uid);
    }

    #endregion

    #region Utilities

    public void OnAnatomicPanacea(EntityUid uid, ChangelingComponent comp, ref ActionAnatomicPanaceaEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        var reagents = new Dictionary<string, FixedPoint2>
        {
            { "LingPanacea", 10f },
        };
        if (TryInjectReagents(uid, reagents))
            _popup.PopupEntity(Loc.GetString("changeling-panacea"), uid, uid);
        else
            return;
        PlayMeatySound(uid, comp);
    }
    public void OnBiodegrade(EntityUid uid, ChangelingComponent comp, ref ActionBiodegradeEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        if (TryComp<CuffableComponent>(uid, out var cuffs) && cuffs.Container.ContainedEntities.Count > 0)
        {
            var cuff = cuffs.LastAddedCuffs;

            _cuffs.Uncuff(uid, cuffs.LastAddedCuffs, cuff);
            QueueDel(cuff);
        }

        var soln = new Solution();
        soln.AddReagent("PolytrinicAcid", 10f);

        if (_pull.IsPulled(uid))
        {
            var puller = Comp<PullableComponent>(uid).Puller;
            if (puller != null)
            {
                _puddle.TrySplashSpillAt((EntityUid) puller, Transform((EntityUid) puller).Coordinates, soln, out _);
                return;
            }
        }
        _puddle.TrySplashSpillAt(uid, Transform(uid).Coordinates, soln, out _);
    }
    public void OnChameleonSkin(EntityUid uid, ChangelingComponent comp, ref ActionChameleonSkinEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        if (HasComp<StealthComponent>(uid) && HasComp<StealthOnMoveComponent>(uid))
        {
            RemComp<StealthComponent>(uid);
            RemComp<StealthOnMoveComponent>(uid);
            _popup.PopupEntity(Loc.GetString("changeling-chameleon-end"), uid, uid);
            return;
        }

        EnsureComp<StealthComponent>(uid);
        EnsureComp<StealthOnMoveComponent>(uid);
        _popup.PopupEntity(Loc.GetString("changeling-chameleon-start"), uid, uid);
    }
    public void OnEphedrineOverdose(EntityUid uid, ChangelingComponent comp, ref ActionEphedrineOverdoseEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        var stam = EnsureComp<StaminaComponent>(uid);
        stam.StaminaDamage = 0;

        var reagents = new Dictionary<string, FixedPoint2>
        {
            { "Desoxyephedrine", 5f }
        };
        if (TryInjectReagents(uid, reagents))
            _popup.PopupEntity(Loc.GetString("changeling-inject"), uid, uid);
        else
        {
            _popup.PopupEntity(Loc.GetString("changeling-inject-fail"), uid, uid);
            return;
        }
    }
    // john space made me do this
    public void OnHealUltraSwag(EntityUid uid, ChangelingComponent comp, ref ActionFleshmendEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        var reagents = new Dictionary<string, FixedPoint2>
        {
            { "LingFleshmend", 10f },
        };
        if (TryInjectReagents(uid, reagents))
            _popup.PopupEntity(Loc.GetString("changeling-fleshmend"), uid, uid);
        else return;
        PlayMeatySound(uid, comp);
    }
    public void OnLastResort(EntityUid uid, ChangelingComponent comp, ref ActionLastResortEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        comp.IsInLastResort = true;

        var newUid = TransformEntity(
            uid,
            protoId: "Headslug", // WD EDIT
            comp: comp,
            dropInventory: true,
            transferDamage: false);

        if (newUid == null)
        {
            comp.IsInLastResort = false;
            comp.Chemicals += Comp<ChangelingActionComponent>(args.Action).ChemicalCost;
            return;
        }

        _explosionSystem.QueueExplosion(
            (EntityUid) newUid,
            typeId: "Default",
            totalIntensity: 1,
            slope: 4,
            maxTileIntensity: 2);

        _actions.AddAction((EntityUid) newUid, "ActionLayEgg");

        PlayMeatySound((EntityUid) newUid, comp);
    }
    public void OnLesserForm(EntityUid uid, ChangelingComponent comp, ref ActionLesserFormEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        comp.IsInLesserForm = true;
        var newUid = TransformEntity(uid, protoId: "MobMonkey", comp: comp);
        if (newUid == null)
        {
            comp.IsInLesserForm = false;
            comp.Chemicals += Comp<ChangelingActionComponent>(args.Action).ChemicalCost;
            return;
        }

        PlayMeatySound((EntityUid) newUid, comp);
        var loc = Loc.GetString("changeling-transform-others", ("user", Identity.Entity((EntityUid) newUid, EntityManager)));
        _popup.PopupEntity(loc, (EntityUid) newUid, PopupType.LargeCaution);
    }
    public void OnSpacesuit(EntityUid uid, ChangelingComponent comp, ref ActionSpacesuitEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        if (!TryToggleArmor(uid, comp, [(SpacesuitHelmetPrototype, "head"), (SpacesuitPrototype, "outerClothing")]))
        {
            _popup.PopupEntity(Loc.GetString("changeling-equip-armor-fail"), uid, uid);
            comp.Chemicals += Comp<ChangelingActionComponent>(args.Action).ChemicalCost;
            return;
        }

        PlayMeatySound(uid, comp);
    }
    public void OnHivemindAccess(EntityUid uid, ChangelingComponent comp, ref ActionHivemindAccessEvent args)
    {
        if (!TryUseAbility(uid, comp, args))
            return;

        if (HasComp<HivemindComponent>(uid))
        {
            _popup.PopupEntity(Loc.GetString("changeling-passive-active"), uid, uid);
            return;
        }

        EnsureComp<HivemindComponent>(uid);
        var reciever = EnsureComp<IntrinsicRadioReceiverComponent>(uid);
        var transmitter = EnsureComp<IntrinsicRadioTransmitterComponent>(uid);
        var radio = EnsureComp<ActiveRadioComponent>(uid);
        radio.Channels = new() { "Hivemind" };
        transmitter.Channels = new() { "Hivemind" };

        _popup.PopupEntity(Loc.GetString("changeling-hivemind-start"), uid, uid);
    }

    #endregion
}