import "../core/metadata.ts";
import { defineMetadata, getMetadata } from "../core/metadata.ts";
import type { ProviderScope } from "../core/container.ts";

export const SERVICE_METADATA_KEY = "muddle:service";

export interface ServiceOptions {
	/** Lifetime of the service. */
	scope?: ProviderScope;
}

/** Declares a service. */
export function Service(options: ServiceOptions = {}): ClassDecorator {
	return (target) => {
		defineMetadata(SERVICE_METADATA_KEY, options, target as object);
		return target;
	};
}

/** Reads the options of a `@Service()` decorated class. */
export function getServiceOptions(target: object): ServiceOptions {
	return (
		(getMetadata(SERVICE_METADATA_KEY, target) as ServiceOptions | undefined) ??
		{}
	);
}