import Strategy from './strategy';
import StrategyRunner from './strategy_runner';

/** Launches the substrategy and terminates on the first open connection.
 *
 * @param {Strategy} strategy
 */
export default class FirstConnectedStrategy implements Strategy {
  strategy: Strategy;

  constructor(strategy: Strategy) {
    this.strategy = strategy;
  }

  isSupported(): boolean {
    return this.strategy.isSupported();
  }

  connect(minPriority: number, callback: Function): StrategyRunner {
    var runner = this.strategy.connect(
      minPriority,
      function (error, handshake) {
        if (handshake) {
          runner.abort();
        }
        callback(error, handshake);
      },
    );
    return runner;
  }
}