const { v4: uuidv4 } = require('uuid');

const shareTokens = new Map();
const SHARE_CLEANUP_INTERVAL_MS = 60 * 1000;

function createShareRecord(entryId, filePath, ttlSeconds = 300, oneTime = false, owner = null) {
  const token = uuidv4();
  const expiresAt = Date.now() + ttlSeconds * 1000;
  shareTokens.set(token, { entryId, filePath, expiresAt, oneTime, owner });
  return { token, expiresAt };
}

function getShareRecord(token) {
  const rec = shareTokens.get(token);
  if (!rec) return null;
  if (rec.expiresAt <= Date.now()) {
    shareTokens.delete(token);
    return null;
  }
  return rec;
}

function cleanupShareTokens() {
  const now = Date.now();
  for (const [t, rec] of shareTokens.entries()) {
    if (rec.expiresAt <= now) shareTokens.delete(t);
  }
}

setInterval(cleanupShareTokens, SHARE_CLEANUP_INTERVAL_MS);

module.exports = {
  createShareRecord,
  getShareRecord,
  shareTokens,
};