const events: Record<string, {name: string, date: number}[]> = {};
export class Profiler {
  public static tag(id: string, eventName: string): void {
    const event = {
      name: eventName,
      date: Date.now(),
    };
    if (Object.prototype.hasOwnProperty.call(events, id)) {
      events[id].push(event);
    } else {
      events[id] = [event];
    }
  }

  public static printable(id: string): string {
    let start = null;
    let message = 'Event\tTime\tTook\n';
    for (let i = 0; i < events[id].length; i += 1) {
      if (!start) {
        start = events[id][i].date;
      }
      const took = (events[id][i].date - start) / 1000;
      let diff = 0;
      if (i > 0) {
        diff = (events[id][i].date - events[id][i - 1].date) / 1000;
      }
      message += `${events[id][i].name}\t${took}\t${diff}\n`;
    }
    return message;
  }

  public static clean(id: string): void {
    delete events[id];
  }
}