import type { IncomingMessage, ServerResponse } from "node:http";

export function readJsonBody(req: IncomingMessage): Promise<unknown> {
  return new Promise((resolve, reject) => {
    let body = "";
    req.on("data", (chunk) => {
      body += chunk;
    });
    req.on("end", () => {
      if (!body.trim()) {
        resolve({});
        return;
      }
      try {
        resolve(JSON.parse(body));
      } catch (err) {
        reject(err);
      }
    });
    req.on("error", reject);
  });
}

export function sendJson(res: ServerResponse, status: number, payload: unknown): void {
  const body = JSON.stringify(payload, null, 2);
  res.statusCode = status;
  res.setHeader("content-type", "application/json; charset=utf-8");
  res.end(body);
}