/**
 * Web platform settings using localStorage.
 * Returns Promises to match the Electron IPC-based API contract.
 */
const PREFIX = 'discord-clone-settings:';

// Browsers spell the quota error in a few different ways across vendors.
// Normalizing here so callers can `if (err.isQuotaError)` regardless.
function isQuotaError(e) {
  if (!e) return false;
  const name = e.name || '';
  const code = e.code;
  return (
    name === 'QuotaExceededError' ||
    name === 'NS_ERROR_DOM_QUOTA_REACHED' ||
    code === 22 ||
    code === 1014
  );
}

export default {
  get(key) {
    try {
      const raw = localStorage.getItem(PREFIX + key);
      return Promise.resolve(raw !== null ? JSON.parse(raw) : undefined);
    } catch {
      // Corrupted JSON or blocked storage access — return undefined so
      // the caller falls back to defaults. Worth recovering silently
      // here because a single bad key shouldn't take down the app.
      return Promise.resolve(undefined);
    }
  },

  set(key, value) {
    try {
      localStorage.setItem(PREFIX + key, JSON.stringify(value));
      return Promise.resolve();
    } catch (e) {
      if (isQuotaError(e)) {
        // Reject so the caller can surface the quota error to the user —
        // silently swallowing meant settings just "didn't save" with no
        // warning. Decorate with a flag so callers can branch without
        // sniffing error names themselves.
        const err = new Error('Browser storage quota exceeded');
        err.isQuotaError = true;
        return Promise.reject(err);
      }
      return Promise.reject(e);
    }
  },
};