MovementTests/scenes/player_controller/components/weapon/WeaponSystem.cs

using System;
using System.Collections.Generic;
using Gamesmiths.Forge.Abilities;
using Gamesmiths.Forge.Core;
using Gamesmiths.Forge.Effects;
using Gamesmiths.Forge.Effects.Calculator;
using Gamesmiths.Forge.Effects.Components;
using Gamesmiths.Forge.Effects.Duration;
using Gamesmiths.Forge.Effects.Magnitudes;
using Gamesmiths.Forge.Effects.Periodic;
using Gamesmiths.Forge.Events;
using Gamesmiths.Forge.Tags;
using Godot;
using GodotStateCharts;
using Movementtests.addons.godot_state_charts.csharp;
using Movementtests.forge.abilities;
using Movementtests.interfaces;
using Movementtests.scenes.player_controller.components.weapon;
using Movementtests.systems.damage;
using Movementtests.tools;
using Movementtests.tools.calculators;

namespace Movementtests.systems;

public record struct WeaponEventPayload(String Message);


public class ClosureBehavior<TPayload>(
    Action<AbilityBehaviorContext, TPayload> callback) : IAbilityBehavior<TPayload>
{
    public void OnStarted(AbilityBehaviorContext context, TPayload data)
    {
        callback(context, data);
        context.InstanceHandle.End();
    }

    public void OnEnded(AbilityBehaviorContext context){}
}

[GlobalClass, Icon("res://assets/ui/IconGodotNode/node_3D/icon_sword.png")]
public partial class WeaponSystem : RigidBody3D, IDamageDealer, IForgeEntity
{
    [Signal]
    public delegate void WeaponThrownEventHandler();
    
    [Signal]
    public delegate void WeaponRetrievedEventHandler();
    
    [Export]
    public RDamage RDamage { get; set; }
    [Export(PropertyHint.Range, "0,100,1,or_greater")]
    public float ThrowForce { get; set; } = 1f;
    [Export(PropertyHint.Range, "0,0.2,0.01,or_greater")]
    public float StraightThrowDuration { get; set; } = 0.1f;
    
    public EntityAttributes Attributes { get; set; } = null!;
    public EntityTags Tags { get; set; } = null!;
    public EffectsManager EffectsManager { get; set; } = null!;
    public EntityAbilities Abilities { get; set; } = null!;
    public EventManager Events { get; set; } = null!;
    
    private StateChart      _weaponState = null!;
    public StateChartState  InHandState = null!;
    public StateChartState  FlyingState = null!;
    public StateChartState  PlantedState = null!;
    private Transition      _handToFlying = null!;
    private Transition      _flyingToHand = null!;
    private Transition      _plantedToHand = null!;
    private Transition      _plantedToFlying = null!;
    private Transition      _toPlanted = null!;

    private ShapeCast3D _dashCast3D = null!;
    public Timer WeaponFlyingTick = null!;
    
    private Transform3D _startTransform;
    private Vector3 _startMeshRotation;

    private Vector3 _throwDirection;
    public Vector3 PlantLocation { get; set; }
    public Vector3 PlantNormal { get; set; }
    public Node? PlantObject { get; set; }

    public MeshInstance3D WeaponLocationIndicator { get; set; } = null!;
    public StandardMaterial3D WeaponLocationIndicatorMaterial { get; set; } = null!;
    public MeshInstance3D WeaponMesh { get; set; } = null!;

    public Tag WeaponFlyingTickEventTag;
    public Tag WeaponStartedFlyingEventTag;
    public Tag WeaponStoppedFlyingEventTag;
    public Tag WeaponHandToFlyingEventTag;
    public Tag WeaponFlyingToHandEventTag;
    public Tag WeaponPlantedToHandEventTag;
    public Tag WeaponPlantedToFlyingEventTag;
    public Tag WeaponPlantedEventTag;
    
    public Tag WeaponInHandStatusTag;
    public Tag WeaponFlyingStatusTag;
    public Tag WeaponPlantedStatusTag;
    
    public Tag WeaponFlyingAbilityTag;

    private RAbilityBase? _flyingAbility;
    public List<RAbilityBase> AbilityLoadout { get; } = [];

    public void Init()
    {
        _weaponState = StateChart.Of(GetNode("StateChart"));
        InHandState = StateChartState.Of(GetNode("StateChart/Root/InHand"));
        FlyingState = StateChartState.Of(GetNode("StateChart/Root/Flying"));
        PlantedState = StateChartState.Of(GetNode("StateChart/Root/Planted"));
        _handToFlying = Transition.Of(GetNode("StateChart/Root/InHand/ToFlying"));
        _flyingToHand = Transition.Of(GetNode("StateChart/Root/Flying/ToHand"));
        _plantedToHand = Transition.Of(GetNode("StateChart/Root/Planted/ToHand"));
        _plantedToFlying = Transition.Of(GetNode("StateChart/Root/Planted/ToFlying"));
        _toPlanted = Transition.Of(GetNode("StateChart/Root/ToPlanted"));

        WeaponLocationIndicator = GetNode<MeshInstance3D>("WeaponLocationIndicator");
        WeaponLocationIndicator.Visible = false;
        WeaponLocationIndicatorMaterial = (WeaponLocationIndicator.GetActiveMaterial(0) as StandardMaterial3D)!;

        WeaponFlyingTick = GetNode<Timer>("WeaponFlyingTick");
        
        WeaponMesh = GetNode<MeshInstance3D>("Weapon");
        _startMeshRotation = WeaponMesh.Rotation;

        _startTransform = Transform;
        Freeze = true;
        Visible = false;
        
        // Forge
        var tagsManager = ForgeManager.GetTagsManager(this);
        var cuesManager = ForgeManager.GetCuesManager(this);
        
        WeaponFlyingTickEventTag = Tag.RequestTag(tagsManager, "events.weapon.flyingTick");
        WeaponStartedFlyingEventTag = Tag.RequestTag(tagsManager, "events.weapon.startedFlying");
        WeaponStoppedFlyingEventTag = Tag.RequestTag(tagsManager, "events.weapon.stoppedFlying");
        WeaponHandToFlyingEventTag = Tag.RequestTag(tagsManager, "events.weapon.handToFlying");
        WeaponFlyingToHandEventTag = Tag.RequestTag(tagsManager, "events.weapon.flyingToHand");
        WeaponPlantedToHandEventTag = Tag.RequestTag(tagsManager, "events.weapon.plantedToHand");
        WeaponPlantedToFlyingEventTag = Tag.RequestTag(tagsManager, "events.weapon.plantedToFlying");
        WeaponPlantedEventTag = Tag.RequestTag(tagsManager, "events.weapon.planted");
        
        WeaponInHandStatusTag  = Tag.RequestTag(tagsManager, "status.weapon.inHand");
        WeaponFlyingStatusTag = Tag.RequestTag(tagsManager, "status.weapon.flying");
        WeaponPlantedStatusTag = Tag.RequestTag(tagsManager, "status.weapon.planted");
        
        WeaponFlyingAbilityTag = Tag.RequestTag(tagsManager,"abilities.weapon.flying");
        
        var baseTags = new TagContainer(
            tagsManager,
            [
                Tag.RequestTag(tagsManager, "weapon"),
            ]);
        
        Attributes = new EntityAttributes(new WeaponAttributeSet());
        Tags = new EntityTags(baseTags);
        EffectsManager = new EffectsManager(this, cuesManager);
        Abilities = new(this);
        Events = new();
        
        CreateFlyingAbility();

        BodyEntered += OnThrownWeaponReachesGround;

        InHandState.StateExited += WeaponLeft;
        InHandState.StateEntered += WeaponBack;

        _handToFlying.Taken += () =>
        {
            Events.Raise(new EventData<WeaponEventPayload>
            {
                EventTags = WeaponHandToFlyingEventTag.GetSingleTagContainer()!,
                Source = this,
                Payload = new WeaponEventPayload(Message: "handToFlying")
            });
            Events.Raise(new EventData<WeaponEventPayload>
            {
                EventTags = WeaponStartedFlyingEventTag.GetSingleTagContainer()!,
                Source = this,
                Payload = new WeaponEventPayload(Message: "startedFlying")
            });
        };

        _flyingToHand.Taken += () =>
        {
            Events.Raise(new EventData<WeaponEventPayload>
            {
                EventTags = WeaponFlyingToHandEventTag.GetSingleTagContainer()!,
                Source = this,
                Payload = new WeaponEventPayload(Message: "flyingToHand")
            });
            Events.Raise(new EventData<WeaponEventPayload>
            {
                EventTags = WeaponStoppedFlyingEventTag.GetSingleTagContainer()!,
                Source = this,
                Payload = new WeaponEventPayload(Message: "stoppedFlying")
            });
        };

        _plantedToHand.Taken += () =>
        {
            Events.Raise(new EventData<WeaponEventPayload>
            {
                EventTags = WeaponPlantedToHandEventTag.GetSingleTagContainer()!,
                Source = this,
                Payload = new WeaponEventPayload(Message: "plantedToHand")
            });
        };

        _plantedToFlying.Taken += () =>
        {
            Events.Raise(new EventData<WeaponEventPayload>
            {
                EventTags = WeaponPlantedToFlyingEventTag.GetSingleTagContainer()!,
                Source = this,
                Payload = new WeaponEventPayload(Message: "plantedToFlying")
            });
            Events.Raise(new EventData<WeaponEventPayload>
            {
                EventTags = WeaponStartedFlyingEventTag.GetSingleTagContainer()!,
                Source = this,
                Payload = new WeaponEventPayload(Message: "startedFlying")
            });
        };

        _toPlanted.Taken += () =>
        {
            Events.Raise(new EventData<WeaponEventPayload>
            {
                EventTags = WeaponPlantedEventTag.GetSingleTagContainer()!,
                Source = this,
                Target = _plantedEntity,
                Payload = new WeaponEventPayload(Message: "planted")
            });
            Events.Raise(new EventData<WeaponEventPayload>
            {
                EventTags = WeaponStoppedFlyingEventTag.GetSingleTagContainer()!,
                Source = this,
                Payload = new WeaponEventPayload(Message: "stoppedFlying")
            });
        };

        Events.Subscribe<WeaponEventPayload>(WeaponStoppedFlyingEventTag, data =>
        {
            GD.Print("This is removing the periodic effect to the flying weapon");
            GD.Print(data.Payload.Message);
            if (_flyingWeaponEffectHandle is { IsValid: true }) EffectsManager.RemoveEffect(_flyingWeaponEffectHandle);
        });
    }
    private ActiveEffectHandle? _flyingWeaponEffectHandle;
    
    public void CreateFlyingAbility()
    {
        var flyingWeaponEffectData = new EffectData(
            "Flying Weapon Effect Data",
            new DurationData(DurationType.Infinite),
            customExecutions:
            [
                new FlyingWeaponExecution(this)
            ],
            periodicData: new PeriodicData(new ScalableFloat(0.2f), false, PeriodInhibitionRemovedPolicy.ResetPeriod)
        );
        
        var weaponHandToFlyingAbilityData = new AbilityData(
            name: "WeaponHandToFlyingSword",
            abilityTags: WeaponFlyingAbilityTag.GetSingleTagContainer(),
            instancingPolicy: AbilityInstancingPolicy.PerEntity,
            abilityTriggerData: AbilityTriggerData.ForEvent<WeaponEventPayload>(WeaponStartedFlyingEventTag),
            behaviorFactory: () => new ClosureBehavior<WeaponEventPayload>((ctx, payload) =>
            {
                GD.Print("This is applying the periodic effect to the flying weapon");
                GD.Print(payload.Message);
                _flyingWeaponEffectHandle = EffectsManager.ApplyEffect(new Effect(flyingWeaponEffectData, new EffectOwnership(this, this)));
            }));
        Abilities.GrantAbilityPermanently(weaponHandToFlyingAbilityData, 1, LevelComparison.None, this);
    }

    public void GrantNewAbilityForWeaponFly(RExplodingSword ability)
    {
        var weaponFlyingAbilityData = new AbilityData(
            name: "WeaponFlyingSwordAbility",
            abilityTags: WeaponFlyingAbilityTag.GetSingleTagContainer(),
            instancingPolicy: AbilityInstancingPolicy.PerEntity,
            abilityTriggerData: AbilityTriggerData.ForEvent<WeaponEventPayload>(WeaponFlyingTickEventTag),
            behaviorFactory: () => ability.Behavior(new ExplodingSwordCreation(this)));
        
        var weaponFlyGrantAbilityConfig = new GrantAbilityConfig(
            weaponFlyingAbilityData,
            ScalableLevel: new ScalableInt(1),
            RemovalPolicy: AbilityDeactivationPolicy.CancelImmediately,
            InhibitionPolicy: AbilityDeactivationPolicy.CancelImmediately,
            TryActivateOnGrant: false,
            TryActivateOnEnable: false,
            LevelOverridePolicy: LevelComparison.Higher);
			
        var weaponFlyGrantComponent = new GrantAbilityEffectComponent([weaponFlyGrantAbilityConfig]);
        var weaponFlyGrantEffect = new EffectData(
            "Grant Weapon Fly Ability",
            new DurationData(DurationType.Infinite),
            effectComponents: [weaponFlyGrantComponent]);
        EffectsManager.ApplyEffect(new Effect(weaponFlyGrantEffect, new EffectOwnership(this, this)));
        
        GD.Print("New weapon flight ability granted");
    }

    public void WeaponLeft()
    {
        Visible = true;
        // WeaponLocationIndicator.Visible = true;
        EmitSignalWeaponThrown();
    }

    public void WeaponBack()
    {
        Visible = false;
        // WeaponLocationIndicator.Visible = false;
        EmitSignalWeaponRetrieved();
    }

    public void PlaceWeaponForTutorial(Vector3 location)
    {
        _weaponState.SendEvent("plant");
        Freeze = true;
        GlobalPosition = location;
        PlantLocation = location;
    }

    public void ThrowWeapon(Vector3 end, bool hasHit, Vector3 collisionLocation, Vector3 collisionNormal, Node collidedObject)
    {
        _weaponState.SendEvent("throw");
        
        _throwDirection = (end - GlobalPosition).Normalized();
        PlantLocation = collisionLocation;
        PlantNormal = collisionNormal;
        LookAt(end);
        
        var tween = GetTree().CreateTween();
        tween.TweenProperty(this, "global_position", end, StraightThrowDuration);
        if (hasHit)
        {
            PlantObject = collidedObject;
            tween.Finished += PlantWeaponInWall;
        }
        else
            tween.Finished += ThrowWeaponOnCurve;
    }

    private IForgeEntity? _plantedEntity;
    public void PlantInEnemy(Node3D enemy)
    {
        GetTree().GetRoot().CallDeferred(Node.MethodName.RemoveChild, this);
        enemy.CallDeferred(Node.MethodName.AddChild, this);

        if (enemy is IForgeEntity victim) _plantedEntity = victim;
        else _plantedEntity = null;

        if (enemy is IDamageable damageable)
        {
            damageable.TakeDamage(new DamageRecord(GlobalPosition, RDamage));
        }
    }

    public void RethrowWeapon()
    {
        _weaponState.SendEvent("throw");
        
        _throwDirection = Vector3.Up;
        ThrowWeaponOnCurve();
    }

    public void ThrowWeaponOnCurve()
    {
        Freeze = false;
        ApplyImpulse(_throwDirection * ThrowForce);
    }

    public void PlantWeaponInWall()
    {
        Freeze = true;
        WeaponMesh.Rotation = _startMeshRotation;
        
        // WeaponLocationIndicatorMaterial.StencilColor = new Color(1f, 0.2f, 0.2f);
        if (PlantObject is Node3D node)
            PlantInEnemy(node);
        
        _weaponState.SendEvent("plant");
        
        CallDeferred(Node3D.MethodName.SetGlobalPosition, PlantLocation);
        CallDeferred(Node3D.MethodName.LookAt, GlobalTransform.Origin + PlantNormal, Vector3.Up, true);
    }

    public void OnThrownWeaponReachesGround(Node other)
    {
        PlantObject = other;
        PlantWeaponInWall();
    }

    public void ResetWeapon()
    {
        _weaponState.SendEvent("recover");
        Transform = _startTransform;
        Freeze = true;
        Visible = false;
    }
    
    public override void _IntegrateForces(PhysicsDirectBodyState3D state)
    {
        base._IntegrateForces(state);
        
        if (!Freeze && state.GetContactCount() > 0)
        {
            PlantLocation = state.GetContactLocalPosition(0);
            PlantNormal = state.GetContactLocalNormal(0);
        }
    }

    public override void _Process(double delta)
    {
        if (!FlyingState.Active) return;
        
        WeaponMesh.Rotation = new Vector3(WeaponMesh.Rotation.X, WeaponMesh.Rotation.Y + (float) delta * 100, WeaponMesh.Rotation.Z);
        //LookAt(GlobalTransform.Origin + LinearVelocity.Normalized(), Vector3.Up, false);
    }

    public bool IsPlantedUnderPlatform()
    {
        return PlantedState.Active && GlobalRotation.X > 1 && Math.Abs(GlobalRotation.Y) > 1;
    }

    public bool IsPlantedInWall()
    {
        return PlantedState.Active && Math.Abs(GlobalRotation.X) + Math.Abs(GlobalRotation.Z) < 0.3;
    }
}