import { Handlers } from "$fresh/server.ts";

function GET() {
  let timer: number | undefined = undefined;
  const body = new ReadableStream({
    start(controller) {
      timer = setInterval(() => {
        const message = `It is ${new Date().toISOString()}\n`;
        controller.enqueue(new TextEncoder().encode(message));
      }, 1000);
    },

    cancel() {
      if (timer !== undefined) {
        clearInterval(timer);
      }
    },
  });

  return new Response(body, {
    headers: {
      "content-type": "text/plain",
      "x-content-type-options": "nosniff",
    },
  });
}

export const handler: Handlers = {
  GET,
};