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import { Logger } from './Logger';
import { EnhancedEventEmitter } from './EnhancedEventEmitter';
import { Worker, WorkerSettings } from './Worker';
import * as utils from './utils';
import { supportedRtpCapabilities } from './supportedRtpCapabilities';
import { RtpCapabilities } from './RtpParameters';
import * as types from './types';

/**
 * Expose all types.
 */
export { types };

/**
 * Expose mediasoup version.
 */
export const version = '__MEDIASOUP_VERSION__';

/**
 * Expose parseScalabilityMode() function.
 */
export { parse as parseScalabilityMode } from './scalabilityModes';

const logger = new Logger();
const observer = new EnhancedEventEmitter();

/**
 * Observer.
 *
 * @emits newworker - (worker: Worker)
 */
export { observer };

/**
 * Create a Worker.
 */
export async function createWorker(
	{
		logLevel = 'error',
		logTags,
		rtcMinPort = 10000,
		rtcMaxPort = 59999,
		dtlsCertificateFile,
		dtlsPrivateKeyFile,
		appData = {}
	}: WorkerSettings = {}
): Promise<Worker>
{
	logger.debug('createWorker()');

	if (appData && typeof appData !== 'object')
		throw new TypeError('if given, appData must be an object');

	const worker = new Worker(
		{
			logLevel,
			logTags,
			rtcMinPort,
			rtcMaxPort,
			dtlsCertificateFile,
			dtlsPrivateKeyFile,
			appData
		});

	return new Promise((resolve, reject) =>
	{
		worker.on('@success', () =>
		{
			// Emit observer event.
			observer.safeEmit('newworker', worker);

			resolve(worker);
		});

		worker.on('@failure', reject);
	});
}

/**
 * Get a cloned copy of the mediasoup supported RTP capabilities.
 */
export function getSupportedRtpCapabilities(): RtpCapabilities
{
	return utils.clone(supportedRtpCapabilities) as RtpCapabilities;
}