/************************************************************************************************************************
*This module contain main templates for user.
*There are three structure templates (mixins) which should be added on top of structure:
* - System: make system structure
* - Component: make component structure
* - Event: make event structure
*
*ex.
*Struct System1
*{
*	mixin!ECS.System;
*}
*
*Struct System2
*{
*	mixin!ECS.System(16);//set number of jobs generated for system by multithreaded update
*}
*
*Struct Component1
*{
*	mixin!ECS.Component;
*}
*
*Struct Event1
*{
*	mixin!ECS.Event;
*}
*
*There is also template for generating list of excluded components "ExcludedComponets(T...)".
*This template takes component structure types and making list of excluded components used in "registerSystem" function.
*
*/
module ecs.core;

public import ecs.manager;
public import ecs.entity;

/************************************************************************************************************************
*Main struct used as namespace for templates.
*/
static struct ECS
{
	/************************************************************************************************************************
	*Mark structure as System. Should be added on top of structure (before any data).
	*/
	mixin template System(uint jobs_count = 32)
	{
		__gshared ushort system_id = ushort.max;
		uint __ecs_jobs_count = jobs_count;
	}

	/************************************************************************************************************************
	*Mark structure as Component. Should be added on top of structure (before any data).
	*/
	mixin template Component()
	{
		__gshared ushort component_id = ushort.max;
	}

	/************************************************************************************************************************
	*Mark structure as Event. Should be added on top of structure (before any data).
	*/
    mixin template Event()
	{
		__gshared ushort event_id = ushort.max;
		EntityID entity_id;
	}

	/************************************************************************************************************************
	*Make list of excluded components. This template get structure types as argument. Should be added inside System structure.
	*/
	mixin template ExcludedComponents(T...)
	{
		alias ExcludedComponents = T;
	}
}