using Content.Shared.FixedPoint;
using Content.Shared.Traits;
using JetBrains.Annotations;
using Robust.Shared.Prototypes;
using Robust.Shared.Serialization.Manager;
using Content.Shared.Implants;
using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype.Set;
using Content.Shared.Actions;
using Content.Server.Abilities.Psionics;
using Content.Shared.Psionics;
using Content.Server.Language;
using Content.Shared.Mood;
using Content.Shared.Traits.Assorted.Components;
using Content.Shared.Damage;
using Content.Shared.Damage.Components;
using Content.Shared.Chemistry.Components;
using Content.Shared.Chemistry.EntitySystems;
using Content.Shared.Mobs.Components;
using Content.Shared.Mobs.Systems;
using Content.Shared.Mobs;
using Content.Shared.Damage.Components;
using Content.Shared.NPC.Systems;
using Content.Shared.Weapons.Melee;
using Robust.Shared.Audio;
using Content.Shared.Tag;

namespace Content.Server.Traits;

/// Used for traits that add a Component upon spawning in, overwriting the pre-existing component if it already exists.
[UsedImplicitly]
public sealed partial class TraitReplaceComponent : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public ComponentRegistry Components { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        foreach (var (_, data) in Components)
        {
            var comp = (Component) serializationManager.CreateCopy(data.Component, notNullableOverride: true);
            comp.Owner = uid;
            entityManager.AddComponent(uid, comp, true);
        }
    }
}

/// <summary>
///     Used for traits that add a Component upon spawning in.
///     This will do nothing if the Component already exists.
/// </summary>
[UsedImplicitly]
public sealed partial class TraitAddComponent : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public ComponentRegistry Components { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        foreach (var entry in Components.Values)
        {
            if (entityManager.HasComponent(uid, entry.Component.GetType()))
                continue;

            var comp = (Component) serializationManager.CreateCopy(entry.Component, notNullableOverride: true);
            comp.Owner = uid;
            entityManager.AddComponent(uid, comp);
        }
    }
}

/// Used for traits that remove a component upon a player spawning in.
[UsedImplicitly]
public sealed partial class TraitRemoveComponent : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public ComponentRegistry Components { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        foreach (var (name, _) in Components)
            entityManager.RemoveComponentDeferred(uid, factory.GetComponent(name).GetType());
    }
}

/// Used for traits that add an action upon a player spawning in.
[UsedImplicitly]
public sealed partial class TraitAddActions : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public List<EntProtoId> Actions { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        var actionSystem = entityManager.System<SharedActionsSystem>();

        foreach (var id in Actions)
        {
            EntityUid? actionId = null;
            if (actionSystem.AddAction(uid, ref actionId, id))
                actionSystem.StartUseDelay(actionId);
        }
    }
}

/// Used for traits that add an Implant upon spawning in.
[UsedImplicitly]
public sealed partial class TraitAddImplant : TraitFunction
{
    [DataField(customTypeSerializer: typeof(PrototypeIdHashSetSerializer<EntityPrototype>))]
    [AlwaysPushInheritance]
    public HashSet<string> Implants { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        var implantSystem = entityManager.System<SharedSubdermalImplantSystem>();
        implantSystem.AddImplants(uid, Implants);
    }
}

/// <summary>
///     If a trait includes any Psionic Powers, this enters the powers into PsionicSystem to be initialized.
///     If the lack of logic here seems startling, it's okay. All of the logic necessary for adding Psionics is handled by InitializePsionicPower.
/// </summary>
[UsedImplicitly]
public sealed partial class TraitAddPsionics : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public List<ProtoId<PsionicPowerPrototype>> PsionicPowers { get; private set; } = new();

    [DataField, AlwaysPushInheritance]
    public bool PlayFeedback;

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        var prototype = IoCManager.Resolve<IPrototypeManager>();
        var psionic = entityManager.System<PsionicAbilitiesSystem>();

        foreach (var powerProto in PsionicPowers)
            if (prototype.TryIndex(powerProto, out var psionicPower))
                psionic.InitializePsionicPower(uid, psionicPower, PlayFeedback);
    }
}

/// <summary>
///     This isn't actually used for any traits, surprise, other systems can use these functions!
///     This is used by Items of Power to remove a psionic power when unequipped.
/// </summary>
[UsedImplicitly]
public sealed partial class TraitRemovePsionics : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public List<ProtoId<PsionicPowerPrototype>> PsionicPowers { get; private set; } = new();

    [DataField, AlwaysPushInheritance]
    public bool Forced = true;

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        var prototype = IoCManager.Resolve<IPrototypeManager>();
        var psionic = entityManager.System<PsionicAbilitiesSystem>();

        foreach (var powerProto in PsionicPowers)
            if (prototype.TryIndex(powerProto, out var psionicPower))
                psionic.RemovePsionicPower(uid, psionicPower, Forced);
    }
}

/// Handles all modification of Known Languages. Removes languages before adding them.
[UsedImplicitly]
public sealed partial class TraitModifyLanguages : TraitFunction
{
    /// The list of all Spoken Languages that this trait adds.
    [DataField, AlwaysPushInheritance]
    public List<string>? LanguagesSpoken { get; private set; } = default!;

    /// The list of all Understood Languages that this trait adds.
    [DataField, AlwaysPushInheritance]
    public List<string>? LanguagesUnderstood { get; private set; } = default!;

    /// The list of all Spoken Languages that this trait removes.
    [DataField, AlwaysPushInheritance]
    public List<string>? RemoveLanguagesSpoken { get; private set; } = default!;

    /// The list of all Understood Languages that this trait removes.
    [DataField, AlwaysPushInheritance]
    public List<string>? RemoveLanguagesUnderstood { get; private set; } = default!;

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        var language = entityManager.System<LanguageSystem>();

        if (RemoveLanguagesSpoken is not null)
            foreach (var lang in RemoveLanguagesSpoken)
                language.RemoveLanguage(uid, lang, true, false);

        if (RemoveLanguagesUnderstood is not null)
            foreach (var lang in RemoveLanguagesUnderstood)
                language.RemoveLanguage(uid, lang, false, true);

        if (LanguagesSpoken is not null)
            foreach (var lang in LanguagesSpoken)
                language.AddLanguage(uid, lang, true, false);

        if (LanguagesUnderstood is not null)
            foreach (var lang in LanguagesUnderstood)
                language.AddLanguage(uid, lang, false, true);
    }
}

/// Handles adding Moodlets to a player character upon spawning in. Typically used for permanent moodlets or drug addictions.
[UsedImplicitly]
public sealed partial class TraitAddMoodlets : TraitFunction
{
    /// The list of all Moodlets that this trait adds.
    [DataField, AlwaysPushInheritance]
    public List<ProtoId<MoodEffectPrototype>> MoodEffects { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        var prototype = IoCManager.Resolve<IPrototypeManager>();

        foreach (var moodProto in MoodEffects)
            if (prototype.TryIndex(moodProto, out var moodlet))
                entityManager.EventBus.RaiseLocalEvent(uid, new MoodEffectEvent(moodlet.ID));
    }
}

/// Add or remove Factions from a player upon spawning in.
[UsedImplicitly]
public sealed partial class TraitModifyFactions : TraitFunction
{
    /// <summary>
    ///     The list of all Factions that this trait removes.
    /// </summary>
    /// <remarks>
    ///     I can't actually Validate these because the proto lives in Shared.
    /// </remarks>
    [DataField, AlwaysPushInheritance]
    public List<string> RemoveFactions { get; private set; } = new();

    /// <summary>
    ///     The list of all Factions that this trait adds.
    /// </summary>
    /// <remarks>
    ///     I can't actually Validate these because the proto lives in Shared.
    /// </remarks>
    [DataField, AlwaysPushInheritance]
    public List<string> AddFactions { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        var factionSystem = entityManager.System<NpcFactionSystem>();

        foreach (var faction in RemoveFactions)
            factionSystem.RemoveFaction(uid, faction);

        foreach (var faction in AddFactions)
            factionSystem.AddFaction(uid, faction);
    }
}

/// Only use this if you know what you're doing. This function directly writes to any arbitrary component.
[UsedImplicitly]
public sealed partial class TraitVVEdit : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public Dictionary<string, string> VVEdit { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        var vvm = IoCManager.Resolve<IViewVariablesManager>();
        foreach (var (path, value) in VVEdit)
            vvm.WritePath(path, value);
    }
}

/// Used for writing to an entity's ExtendDescriptionComponent. If one is not present, it will be added!
/// Use this to create traits that add special descriptions for when a character is shift-click examined.
[UsedImplicitly]
public sealed partial class TraitPushDescription : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public List<DescriptionExtension> DescriptionExtensions { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        entityManager.EnsureComponent<ExtendDescriptionComponent>(uid, out var descComp);
        foreach (var descExtension in DescriptionExtensions)
            descComp.DescriptionList.Add(descExtension);
    }
}

[UsedImplicitly]
public sealed partial class TraitAddArmor : TraitFunction
{
    /// <summary>
    ///     The list of prototype ID's of DamageModifierSets to be added to the enumerable damage modifiers of an entity.
    /// </summary>
    /// <remarks>
    ///     Dear Maintainer, I'm well aware that validating protoIds is a thing. Unfortunately, this is for a legacy system that doesn't have validated prototypes.
    ///     And refactoring the entire DamageableSystem is way the hell outside of the scope of the PR adding this function.
    ///     {FaridaIsCute.png} - Solidus
    /// </remarks>
    [DataField, AlwaysPushInheritance]
    public List<string> DamageModifierSets { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        entityManager.EnsureComponent<DamageableComponent>(uid, out var damageableComponent);
        foreach (var modifierSet in DamageModifierSets)
            damageableComponent.DamageModifierSets.Add(modifierSet);
    }
}

[UsedImplicitly]
public sealed partial class TraitRemoveArmor : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public List<string> DamageModifierSets { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        if (!entityManager.TryGetComponent<DamageableComponent>(uid, out var damageableComponent))
            return;

        foreach (var modifierSet in DamageModifierSets)
            damageableComponent.DamageModifierSets.Remove(modifierSet);
    }
}

[UsedImplicitly]
public sealed partial class TraitAddSolutionContainer : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public Dictionary<string, SolutionComponent> Solutions { get; private set; } = new();

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        var solutionContainer = entityManager.System<SharedSolutionContainerSystem>();

        foreach (var (containerKey, solution) in Solutions)
        {
            var hasSolution = solutionContainer.EnsureSolution(uid, containerKey, out Solution? newSolution);

            if (!hasSolution)
                return;

            newSolution!.AddSolution(solution.Solution, null);
        }
    }
}

[UsedImplicitly]
public sealed partial class TraitModifyMobThresholds : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public int CritThresholdModifier;

    [DataField, AlwaysPushInheritance]
    public int SoftCritThresholdModifier;

    [DataField, AlwaysPushInheritance]
    public int DeadThresholdModifier;

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        if (!entityManager.TryGetComponent<MobThresholdsComponent>(uid, out var threshold))
            return;

        var thresholdSystem = entityManager.System<MobThresholdSystem>();
        if (CritThresholdModifier != 0)
        {
            var critThreshold = thresholdSystem.GetThresholdForState(uid, MobState.Critical, threshold);
            if (critThreshold != 0)
                thresholdSystem.SetMobStateThreshold(uid, critThreshold + CritThresholdModifier, MobState.Critical);
        }

        if (SoftCritThresholdModifier != 0)
        {
            var softCritThreshold = thresholdSystem.GetThresholdForState(uid, MobState.SoftCritical, threshold);
            if (softCritThreshold != 0)
                thresholdSystem.SetMobStateThreshold(uid, softCritThreshold + SoftCritThresholdModifier, MobState.SoftCritical);
        }

        if (DeadThresholdModifier != 0)
        {
            var deadThreshold = thresholdSystem.GetThresholdForState(uid, MobState.Dead, threshold);
            if (deadThreshold != 0)
                thresholdSystem.SetMobStateThreshold(uid, deadThreshold + DeadThresholdModifier, MobState.Dead);
        }
    }
}

[UsedImplicitly]
public sealed partial class TraitModifyMobState : TraitFunction
{
    // Three-State Booleans my beloved.
    // :faridabirb.png:

    [DataField, AlwaysPushInheritance]
    public bool? AllowMovementWhileCrit;

    [DataField, AlwaysPushInheritance]
    public bool? AllowMovementWhileSoftCrit;

    [DataField, AlwaysPushInheritance]
    public bool? AllowMovementWhileDead;

    [DataField, AlwaysPushInheritance]
    public bool? AllowTalkingWhileCrit;

    [DataField, AlwaysPushInheritance]
    public bool? AllowTalkingWhileSoftCrit;

    [DataField, AlwaysPushInheritance]
    public bool? AllowTalkingWhileDead;

    [DataField, AlwaysPushInheritance]
    public bool? DownWhenCrit;

    [DataField, AlwaysPushInheritance]
    public bool? DownWhenSoftCrit;

    [DataField, AlwaysPushInheritance]
    public bool? DownWhenDead;

    [DataField, AlwaysPushInheritance]
    public bool? AllowHandInteractWhileCrit;

    [DataField, AlwaysPushInheritance]
    public bool? AllowHandInteractWhileSoftCrit;

    [DataField, AlwaysPushInheritance]
    public bool? AllowHandInteractWhileDead;

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        if (!entityManager.TryGetComponent<MobStateComponent>(uid, out var mobStateComponent))
            return;

        if (AllowMovementWhileCrit is not null)
            mobStateComponent.AllowMovementWhileCrit = AllowMovementWhileCrit.Value;

        if (AllowMovementWhileSoftCrit is not null)
            mobStateComponent.AllowHandInteractWhileSoftCrit = AllowMovementWhileSoftCrit.Value;

        if (AllowMovementWhileDead is not null)
            mobStateComponent.AllowMovementWhileDead = AllowMovementWhileDead.Value;

        if (AllowTalkingWhileCrit is not null)
            mobStateComponent.AllowTalkingWhileCrit = AllowTalkingWhileCrit.Value;

        if (AllowTalkingWhileSoftCrit is not null)
            mobStateComponent.AllowTalkingWhileSoftCrit = AllowTalkingWhileSoftCrit.Value;

        if (AllowTalkingWhileDead is not null)
            mobStateComponent.AllowTalkingWhileDead = AllowTalkingWhileDead.Value;

        if (DownWhenCrit is not null)
            mobStateComponent.DownWhenCrit = DownWhenCrit.Value;

        if (DownWhenSoftCrit is not null)
            mobStateComponent.DownWhenSoftCrit = DownWhenSoftCrit.Value;

        if (DownWhenDead is not null)
            mobStateComponent.DownWhenDead = DownWhenDead.Value;

        if (AllowHandInteractWhileCrit is not null)
            mobStateComponent.AllowHandInteractWhileCrit = AllowHandInteractWhileCrit.Value;

        if (AllowHandInteractWhileSoftCrit is not null)
            mobStateComponent.AllowHandInteractWhileSoftCrit = AllowHandInteractWhileSoftCrit.Value;

        if (AllowHandInteractWhileDead is not null)
            mobStateComponent.AllowHandInteractWhileDead = AllowHandInteractWhileDead.Value;
    }
}

[UsedImplicitly]
public sealed partial class TraitModifyStamina : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public float StaminaModifier;

    [DataField, AlwaysPushInheritance]
    public float DecayModifier;

    [DataField, AlwaysPushInheritance]
    public float CooldownModifier;

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        if (!entityManager.TryGetComponent<StaminaComponent>(uid, out var staminaComponent))
            return;

        staminaComponent.CritThreshold += StaminaModifier;
        staminaComponent.Decay += DecayModifier;
        staminaComponent.Cooldown += CooldownModifier;
    }
}

/// <summary>
///     Used for traits that modify SlowOnDamageComponent.
/// </summary>
[UsedImplicitly]
public sealed partial class TraitModifySlowOnDamage : TraitFunction
{
    // <summary>
    //     A flat modifier to add to all damage threshold keys.
    // </summary>
    [DataField, AlwaysPushInheritance]
    public float DamageThresholdsModifier;

    // <summary>
    //     A multiplier applied to all speed modifier values.
    //     The higher the multiplier, the stronger the slowdown.
    // </summary>
    [DataField, AlwaysPushInheritance]
    public float SpeedModifierMultiplier = 1f;

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        if (!entityManager.TryGetComponent<SlowOnDamageComponent>(uid, out var slowOnDamage))
            return;

        var newSpeedModifierThresholds = new Dictionary<FixedPoint2, float>();

        foreach (var (damageThreshold, speedModifier) in slowOnDamage.SpeedModifierThresholds)
            newSpeedModifierThresholds[damageThreshold + DamageThresholdsModifier] = 1 - (1 - speedModifier) * SpeedModifierMultiplier;

        slowOnDamage.SpeedModifierThresholds = newSpeedModifierThresholds;
    }
}

/// <summary>
///     Used for traits that modify unarmed damage on MeleeWeaponComponent.
/// </summary>
[UsedImplicitly]
public sealed partial class TraitModifyUnarmed : TraitFunction
{
    // <summary>
    //     The sound played on hitting targets.
    // </summary>
    [DataField, AlwaysPushInheritance]
    public SoundSpecifier? SoundHit;

    // <summary>
    //     The animation to play on hit, for both light and power attacks.
    // </summary>
    [DataField, AlwaysPushInheritance]
    public EntProtoId? Animation;

    // <summary>
    //     Whether to set the power attack animation to be the same as the light attack.
    // </summary>
    [DataField, AlwaysPushInheritance]
    public bool HeavyAnimationFromLight = true;

    // <summary>
    //     The damage values of unarmed damage.
    // </summary>
    [DataField, AlwaysPushInheritance]
    public DamageSpecifier? Damage;

    // <summary>
    //     Additional damage added to the existing damage.
    // </summary>
    [DataField, AlwaysPushInheritance]
    public DamageSpecifier? FlatDamageIncrease;

    /// <summary>
    ///   Turns the left click into a power attack when the light attack misses.
    /// </summary>
    [DataField]
    public bool? HeavyOnLightMiss;

    // <summary>
    //     What to multiply the melee weapon range by.
    // </summary>
    [DataField, AlwaysPushInheritance]
    public float? RangeModifier;

    // <summary>
    //     What to multiply the attack rate by.
    // </summary>
    [DataField, AlwaysPushInheritance]
    public float? AttackRateModifier;

    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        if (!entityManager.TryGetComponent<MeleeWeaponComponent>(uid, out var melee))
            return;

        if (SoundHit != null)
            melee.SoundHit = SoundHit;

        if (Animation != null)
            melee.Animation = Animation.Value;

        if (HeavyAnimationFromLight)
            melee.WideAnimation = melee.Animation;

        if (Damage != null)
            melee.Damage = Damage;

        if (FlatDamageIncrease != null)
            melee.Damage += FlatDamageIncrease;

        if (HeavyOnLightMiss != null)
            melee.HeavyOnLightMiss = HeavyOnLightMiss.Value;

        if (RangeModifier != null)
            melee.Range *= RangeModifier.Value;

        if (AttackRateModifier != null)
            melee.AttackRate *= AttackRateModifier.Value;

        entityManager.Dirty(uid, melee);
    }
}


// <summary>
// Adds a Tag to something
// </summary>
[UsedImplicitly]
public sealed partial class TraitAddTag : TraitFunction
{
    [DataField, AlwaysPushInheritance]
    public List<ProtoId<TagPrototype>> Tags { get; private set; } = new();
    
    public override void OnPlayerSpawn(EntityUid uid,
        IComponentFactory factory,
        IEntityManager entityManager,
        ISerializationManager serializationManager)
    {
        var tagSystem = entityManager.System<TagSystem>();
        tagSystem.AddTags(uid, Tags);
    }
}