import {
  Either,
  getRequiredEnv,
  getStdout,
  type ITraceable,
  LogLevel,
  type Mapper,
  TraceUtil,
} from "@emprespresso/pengueno";

type HealthCheckInput = "healthy?";
type HealthCheckOutput = "healthy!";

const HealthCheckActivity = <Trace>(
  check: Mapper<
    ITraceable<HealthCheckInput, Trace>,
    Promise<Either<Error, HealthCheckOutput>>
  >,
) =>
(req: ITraceable<Request, Trace>) =>
  req.bimap(TraceUtil.withFunctionTrace(HealthCheckActivity))
    .flatMap((r) => r.move(<HealthCheckInput> "healthy?"))
    .map(check)
    .map(TraceUtil.promiseify(({ item: health, trace }) => {
      health.mapBoth((e) => {
        trace.addTrace(LogLevel.ERROR).trace(`${e}`);
        return new Response(
          "oh no, i need to eat more vegetables (｡•́︿•̀｡)...\n",
          { status: 500 },
        );
      }, (_healthy) => {
        const msg = `think im healthy!! (✿˘◡˘) ready to do work~`;
        trace.trace(msg);
        return new Response(
          msg + "\n",
          { status: 200 },
        );
      });
    }));