'use strict';

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

const settingsPath = path.join(__dirname, '..', 'data', 'admin-settings.json');

function getSettings() {
  try {
    const raw = fs.readFileSync(settingsPath, 'utf8');
    const parsed = JSON.parse(raw);
    return {
      ouDn: typeof parsed.ouDn === 'string' ? parsed.ouDn : '',
      defaultGroups: Array.isArray(parsed.defaultGroups)
        ? parsed.defaultGroups.filter((g) => typeof g === 'string')
        : []
    };
  } catch (err) {
    return { ouDn: '', defaultGroups: [] };
  }
}

function updateSettings(patch) {
  const current = getSettings();
  const next = { ...current };
  if (patch && typeof patch.ouDn === 'string') next.ouDn = patch.ouDn;
  if (patch && Array.isArray(patch.defaultGroups)) {
    next.defaultGroups = patch.defaultGroups.filter((g) => typeof g === 'string');
  }
  fs.mkdirSync(path.dirname(settingsPath), { recursive: true });
  fs.writeFileSync(settingsPath, JSON.stringify(next, null, 2), 'utf8');
  return next;
}

module.exports = { getSettings, updateSettings, settingsPath };