const fs = require('fs/promises');
const path = require('path');

const storageDir = path.resolve(process.cwd(), 'storage', 'auth');
const storageFile = path.join(storageDir, 'password-change-requests.json');

const readRequests = async () => {
  try {
    const raw = await fs.readFile(storageFile, 'utf8');
    return JSON.parse(raw);
  } catch (error) {
    return {};
  }
};

const writeRequests = async (data) => {
  await fs.mkdir(storageDir, { recursive: true });
  await fs.writeFile(storageFile, JSON.stringify(data, null, 2), 'utf8');
};

const saveRequest = async (token, data) => {
  const current = await readRequests();
  current[token] = data;
  await writeRequests(current);
};

const findRequest = async (token) => {
  const current = await readRequests();
  return current[token] || null;
};

const deleteRequest = async (token) => {
  const current = await readRequests();
  if (!current[token]) return;
  delete current[token];
  await writeRequests(current);
};

module.exports = {
  saveRequest,
  findRequest,
  deleteRequest,
};