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import { parse } from "./duration";
import { perform } from "./email";
import type { EmailJob } from "./job";
import { ConsoleLogger } from "./logger";

export const main = (port: number) => {
  const server = Bun.serve({
    port,
    async fetch(req) {
      ConsoleLogger.log(`Received request: ${req.url}`)();

      const url = new URL(req.url);
      if (req.method === "POST" && url.pathname === "/api/email") {
        const prevalidatedJob = await req.json();
        const interval = parse(prevalidatedJob.readRetry.interval);
        if (interval._tag === "Left") {
          return new Response(interval.left, { status: 400 });
        }
        prevalidatedJob.readRetry.interval = interval;
        const job: EmailJob = {
          ...prevalidatedJob,
          readRetry: { ...prevalidatedJob.readRetry, interval },
        };

        const jobInsensitive = structuredClone(job);
        jobInsensitive.from.username = "****REDACTED****";
        jobInsensitive.from.password = "****REDACTED****";
        jobInsensitive.to.username = "****REDACTED****";
        jobInsensitive.to.password = "****REDACTED****";

        const uuid = crypto.randomUUID();
        ConsoleLogger.log(
          `[${uuid}] Received email job: ${JSON.stringify(jobInsensitive)}`,
        )();

        const performEmailTest = perform(job)();
        return performEmailTest
          .then((result) => {
            if (result._tag === "Left") {
              const error = result.left;
              ConsoleLogger.log(
                `[${uuid}] job failure due to ${error.message}`,
              )();
              return new Response(error.message, {
                status: 400,
              });
            }
            ConsoleLogger.log(`[${uuid}] success`)();
            return Response.json({ success: true });
          })
          .catch((e) => {
            ConsoleLogger.log(`[${uuid}] internal failure due to ${e}`)();
            return new Response(e.message, {
              status: 500,
            });
          });
      }
      return new Response("404!", { status: 404 });
    },
  });
  ConsoleLogger.log(`Listening on port ${port}`)();
  return server;
};