export interface TracingLogger {
  info(log: string): void;
  warn(log: string): void;
  error(log: string): void;

  createChild(prefix: string): TracingLogger;
}

export class ConsoleTracingLogger implements TracingLogger {
  protected prefix: string;

  constructor(prefix: string) {
    this.prefix = prefix;
  }

  private makePrefix(level: 'info' | 'warn' | 'error'): string {
    return `[${new Date().toISOString()}] ${level} (${this.prefix}) > `;
  }

  public info(log: string) {
    console.log(this.makePrefix('info') + log);
  }

  public warn(log: string) {
    console.warn(this.makePrefix('warn') + log);
  }

  public error(log: string) {
    console.error(this.makePrefix('error') + log);
  }

  public createChild(prefix: string) {
    return new ConsoleTracingLogger(`${this.prefix} -> ${prefix}`);
  }
}