import type {
  PlayRunnerEvent,
  PlayRunnerResult,
} from '@shared_libs/play-runtime/protocol';

export function parsePlayRunnerEvents(stdout: string): PlayRunnerEvent[] {
  return stdout
    .split(/\r?\n/)
    .map((line) => line.trim())
    .filter(Boolean)
    .flatMap((line) => {
      try {
        return [JSON.parse(line) as PlayRunnerEvent];
      } catch {
        return [];
      }
    });
}

export function parsePlayRunnerEventLine(line: string): PlayRunnerEvent | null {
  try {
    return JSON.parse(line) as PlayRunnerEvent;
  } catch {
    return null;
  }
}

export function findPlayRunnerResult(
  events: PlayRunnerEvent[],
): PlayRunnerResult | null {
  const resultEvent = [...events]
    .reverse()
    .find((event) => event.type === 'result');
  return resultEvent?.type === 'result' ? resultEvent.result : null;
}