import { mkdir, readFile, writeFile } from 'node:fs/promises';
import path from 'node:path';

const logPath = path.join(process.cwd(), 'data', 'request-log.json');
const maximumEntries = 500;

async function loadEntries() {
  try {
    return JSON.parse(await readFile(logPath, 'utf8'));
  } catch (error) {
    if (error.code === 'ENOENT') return [];
    throw error;
  }
}

export async function recordRequest(entry) {
  const entries = await loadEntries();
  entries.push(entry);
  await mkdir(path.dirname(logPath), { recursive: true });
  await writeFile(logPath, `${JSON.stringify(entries.slice(-maximumEntries), null, 2)}\n`, { mode: 0o600 });
}

export async function recentRequests(limit = 50) {
  return (await loadEntries()).slice(-limit).reverse();
}

export async function clearRequests() {
  await mkdir(path.dirname(logPath), { recursive: true });
  await writeFile(logPath, '[]\n', { mode: 0o600 });
}