cryptonhym-thunder/Code/Presenters/GamePresenter.cs

using System.Collections.Generic;
using CryptonymThunder.Code.Autoloads;
using CryptonymThunder.Code.Factories;
using CryptonymThunder.Code.Resources;
using CryptonymThunder.Code.Services;
using GameCore.Attributes;
using GameCore.Combat;
using GameCore.Config;
using GameCore.ECS;
using GameCore.ECS.Interfaces;
using GameCore.Events;
using GameCore.Input;
using GameCore.Inventory;
using GameCore.Movement;
using Godot;

namespace CryptonymThunder.Code.Presenters;

[GlobalClass]
public partial class GamePresenter : Node
{
    [Export] private ArchetypeDatabase ArchetypesDatabase { get; set; }
    [Export] private EntityArchetype PlayerArchetype { get; set; }
    [Export] private SimulationConfigResource SimulationConfig { get; set; }
    
    private World _world;
    private PresenterRegistry _presenterRegistry;
    private GodotInputService _inputService;
    private GodotWorldQuery _worldQuery;
    private PresenterFactory _presenterFactory;
    
    private readonly Dictionary<int, List<IPresenterComponent>> _presenterComponents = new();
    private readonly Dictionary<int, IEntityPresenter> _presenters = new();

    public override void _Ready()
    {
        _presenterRegistry = GetNode<PresenterRegistry>("/root/PresenterRegistry");
        _inputService = new GodotInputService();
        _worldQuery = new GodotWorldQuery(this);
        
        var simConfig = new SimulationConfig();
        if (SimulationConfig != null)
        {
            simConfig.GravityStrength = SimulationConfig.GravityStrength;
        }
        
        _world = new World(_inputService, _worldQuery, simConfig);
        
        _presenterFactory = new PresenterFactory(_world, new ComponentFactory(), _presenterRegistry, this);
        
        _world.RegisterSystem(new PlayerInputSystem());
        _world.RegisterSystem(new RotationSystem());
        _world.RegisterSystem(new GroundMovementSystem());
        _world.RegisterSystem(new GravitySystem());
        _world.RegisterSystem(new JumpSystem());
        
        _world.RegisterSystem(new AttributeSystem());
        _world.RegisterSystem(new PickupSystem());
        _world.RegisterSystem(new InventorySystem(_world));
        _world.RegisterSystem(new ItemAcquisitionSystem(_world));
        
        _world.RegisterSystem(new WeaponSystem());
        _world.RegisterSystem(new ProjectileSystem());
        _world.RegisterSystem(new ProjectileInitializationSystem(_world));
        
        _world.RegisterSystem(new DamageSystem(_world));
        _world.RegisterSystem(new ProjectileCleanupSystem());
        _world.RegisterSystem(new DestructionSystem());
        
        _world.Subscribe<EntityDiedEvent>(OnEntityDied);
        _world.Subscribe<SpawnEntityEvent>(OnSpawnEntity);

        RegisterAllSceneEntities();
        
        var playerData = _presenterFactory.CreateEntityFromArchetype(PlayerArchetype);
        _presenters.Add(playerData.Entity.Id, playerData.Presenter);
        _presenterComponents.Add(playerData.Entity.Id, playerData.Components);
    }
    
    public override void _Input(InputEvent @event)
    {
        _inputService?.HandleInputEvent(@event);
    }

    public override void _PhysicsProcess(double delta)
    {
        if (_presenters.Count == 0) return;
        
        _inputService.Update();
        _world.Update((float)delta);
        _world.ProcessEvents();

        foreach (var componentList in _presenterComponents.Values)
        {
            foreach (var component in componentList)
            {
                component.SyncToPresentation((float)delta);
            }
        }

        foreach (var componentList in _presenterComponents.Values)
        {
            foreach (var component in componentList)
            {
                component.SyncToCore((float)delta);
            }
        }
        
        _inputService.LateUpdate();
    }

    private void OnSpawnEntity(SpawnEntityEvent @event)
    {
        if (ArchetypesDatabase.Archetypes.TryGetValue(@event.ArchetypeId, out var archetype))
        {
            var presenterData = _presenterFactory.CreateEntityFromArchetype(archetype, @event.Position, @event.Rotation, @event.InitialVelocity);
            _presenters.Add(presenterData.Entity.Id, presenterData.Presenter);
            _presenterComponents.Add(presenterData.Entity.Id, presenterData.Components);
            
            _world.PublishEvent(new EntitySpawnedEvent(presenterData.Entity, @event.Owner, @event.ArchetypeId));
        }
    }
    
    private void OnEntityDied(EntityDiedEvent e)
    {
        if (_presenters.Remove(e.Entity.Id, out var presenter))
        {
            _presenterRegistry.UnregisterPresenter(presenter as Node);
            _presenterComponents.Remove(e.Entity.Id);
            (presenter as Node)?.QueueFree();
        }
    }

    private void RegisterAllSceneEntities()
    {
        var sceneEntities = GetTree().GetNodesInGroup("SceneEntities");
        foreach (var node in sceneEntities)
        {
            if (node is SceneEntity sceneEntity)
            {
                var parentNode = sceneEntity.GetParent();
                if (parentNode != null)
                {
                    var presenterData = _presenterFactory.RegisterSceneEntity(parentNode, sceneEntity.ComponentResources);
                    _presenters.Add(presenterData.Entity.Id, presenterData.Presenter);
                    _presenterComponents.Add(presenterData.Entity.Id, presenterData.Components);
                }
            }
        }
    }

    public Node GetPresenterNode(Entity entity)
    {
        if (_presenters.TryGetValue(entity.Id, out var presenter))
        {
            return presenter as Node;
        }

        return null;
    }
}