import { bundleState } from './bundle-state';
import { getOrCreateSharedImpl } from './get-shared';
import type { InitRumOptions, RumServiceRegistration } from './types';

export type {
    ApplicationConfig,
    Cleanup,
    InitRumOptions,
    RumService,
    RumServiceRegistration,
    ServiceConfig,
    ServiceTracingUrls,
} from './types';

/**
 * Registers a service and, optionally, initializes the Datadog RUM SDK.
 *
 * Any caller may pass `application`. The first call that includes it
 * initializes the SDK; subsequent callers' `application` config is ignored
 * with a warning. Callers that omit `application` register their service
 * without attempting SDK init.
 *
 * Returns a `RumServiceRegistration` — `{ cleanup, setServiceContext }`.
 * `cleanup` removes this service's `beforeSend`, `allowedTracingUrls`, and
 * persistent context. `setServiceContext` attaches session-lifetime metadata
 * to every event whose `event.service` matches this service's name.
 */
export function init(opts: InitRumOptions): RumServiceRegistration {
    const impl = getOrCreateSharedImpl();
    const result = impl.init(opts);
    if (result.initializedSdk) {
        bundleState.isSdkInitializer = true;
    }
    const { name } = opts.service;
    return {
        cleanup: result.cleanup,
        setServiceContext: context => impl.setServiceContext(name, context),
    };
}