'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')
        : [],
      phoneRequired: !!parsed.phoneRequired,
      authEnabled: parsed.authEnabled === undefined ? true : !!parsed.authEnabled,
      apiKey: typeof parsed.apiKey === 'string' ? parsed.apiKey : '',
      logonScript: typeof parsed.logonScript === 'string' ? parsed.logonScript : 'PST.bat',
      homeDrive: typeof parsed.homeDrive === 'string' ? parsed.homeDrive : 'Z:',
      homeBasePath: typeof parsed.homeBasePath === 'string' ? parsed.homeBasePath : '\\\\dc\\Teachers',
      crmUrl: typeof parsed.crmUrl === 'string' ? parsed.crmUrl : '',
      quickLinksUrl: typeof parsed.quickLinksUrl === 'string' ? parsed.quickLinksUrl : ''
    };
  } catch (err) {
    return {
      ouDn: '', defaultGroups: [], phoneRequired: false, authEnabled: true, apiKey: '',
      logonScript: 'PST.bat', homeDrive: 'Z:', homeBasePath: '\\\\dc\\Teachers',
      crmUrl: '', quickLinksUrl: ''
    };
  }
}

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');
  }
  if (patch && typeof patch.phoneRequired === 'boolean') next.phoneRequired = patch.phoneRequired;
  if (patch && typeof patch.authEnabled === 'boolean') next.authEnabled = patch.authEnabled;
  if (patch && typeof patch.apiKey === 'string') next.apiKey = patch.apiKey;
  if (patch && typeof patch.logonScript === 'string') next.logonScript = patch.logonScript;
  if (patch && typeof patch.homeDrive === 'string') next.homeDrive = patch.homeDrive;
  if (patch && typeof patch.homeBasePath === 'string') next.homeBasePath = patch.homeBasePath;
  if (patch && typeof patch.crmUrl === 'string') next.crmUrl = patch.crmUrl;
  if (patch && typeof patch.quickLinksUrl === 'string') next.quickLinksUrl = patch.quickLinksUrl;
  fs.mkdirSync(path.dirname(settingsPath), { recursive: true });
  fs.writeFileSync(settingsPath, JSON.stringify(next, null, 2), 'utf8');
  return next;
}

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