#pragma once

/*
	GameEngine and Editor
	by John Ryland
	Copyright (c) 2023
*/

////////////////////////////////////////////////////////////////////////////////////
//	ECS System

#include "IEntityComponentSystem.h"
#include "GameState.h"
#include "XmlParser.h"

namespace GameEngine {

class EcsSystem : public IEntityComponentSystem
{
public:
    EcsSystem();
    ~EcsSystem() override;

    void Initialize() override;
    void Shutdown() override;

    void Prepare() override;
    void Update() override;
    void Render() override;
    void Present() override;

    void SetSchema(GameRuntime::Schema* schema);
    void LoadScene(const char* sceneFilename);

    void RegisterComponentType();
    StringList AllComponentTypeNames() const;
    ComponentTypeId FindComponentTypeByName(String componentName) const;
    Array<EntityId> AllEntities() const;
    Array<EntityId> FindEntitiesWithComponentType(ComponentTypeId componentType) const;
    StringList EntityComponents(EntityId entity) const;
    const EntityRef& GetEntity(EntityId entity) const;
    const ComponentType& GetComponentType(ComponentTypeId componentType) const;
    GameRuntime::Schema* GetSchema() const { return schema; }
    void NewEntity();
    void NewComponent();
    void RemoveStaleComponentReferences();

    void LoadEntitiesFromXml(XmlTag* tag);

private:
    EntityId               lastUsedEntityId = 0;
    ComponentTypeId        lastUsedComponentTypeId = 0;

    GameRuntime::Schema*   schema;
    Entities               entities;
    ComponentTypes         components;
};

} // GameEngine namespace