import type { SystemBuilder } from './system-builder';
import type { AnyECSpresso, ConfigOf, EmptyConfig, WorldConfig } from './type-utils';
import type { SystemPhase } from './types';
/**
 * Defaults applied to every system created through a plugin installation or
 * a system registration scope. Registration scopes snapshot these values;
 * per-system builder calls override them.
 */
export interface SystemDefaults<Cfg extends WorldConfig = EmptyConfig> {
    inScreens?: ReadonlyArray<keyof Cfg['screens'] & string>;
    excludeScreens?: ReadonlyArray<keyof Cfg['screens'] & string>;
    phase?: SystemPhase;
    priority?: number;
}
/**
 * Narrow capability for application modules that only register systems.
 */
export interface SystemRegistrar<Cfg extends WorldConfig = EmptyConfig> {
    addSystem(label: string): SystemBuilder<Cfg>;
}
/**
 * Extract a system registrar with the complete configuration of a built world.
 */
export type SystemRegistrarOf<W extends AnyECSpresso> = SystemRegistrar<ConfigOf<W>>;