import { LogMetricTraceable } from "@emprespresso/pengueno";

const greetings = [
  "hewwo :D",
  "hiya cutie (✿◠‿◠)",
  "boop! ૮・ᴥ・ა",
  "sending virtual hugs! (づ｡◕‿‿◕｡)づ",
  "stay pawsitive ₍^..^₎⟆",
  "⋆｡‧˚❆🐧❆˚‧｡⋆",
];
const penguenoGreeting = () =>
  greetings[Math.floor(Math.random() * greetings.length)];

export class PenguenoRequest extends Request {
  private constructor(
    _input: URL,
    _requestInit: RequestInit,
    public readonly id: string,
    public readonly at: Date,
  ) {
    super(_input, _requestInit);
  }

  public baseResponseHeaders(): Record<string, string> {
    const ServerRequestTime = this.at.getTime();
    const ServerResponseTime = Date.now();
    const DeltaTime = ServerResponseTime - ServerRequestTime;
    const RequestId = this.id;

    return Object.entries({
      RequestId,
      ServerRequestTime,
      ServerResponseTime,
      DeltaTime,
      Hai: penguenoGreeting(),
    }).reduce((acc, [key, val]) => ({ ...acc, [key]: (val.toString()) }), {});
  }

  public static from(
    request: Request,
  ): LogMetricTraceable<PenguenoRequest> {
    const id = crypto.randomUUID();
    const url = new URL(request.url);
    const { pathname } = url;
    const traceSupplier = () => `[${id} <- ${request.method}'d @ ${pathname}]`;
    return LogMetricTraceable
      .from(
        new PenguenoRequest(
          url,
          { ...request },
          id,
          new Date(),
        ),
      )
      .bimap((_request) => [_request.get(), traceSupplier]);
  }
}