import 'package:desktopapp/utils/logger.dart';
import 'package:desktopapp/utils/requests.dart';
import 'package:enough_mail/enough_mail.dart';

class Mailer {
  /// High level mail API example
  static Future<void> mailExample() async {
    const email = 'trexricher1997@gmail.com';
    const password = 'rugnxbafhcwsykzt';
    Logger.log(LoggerType.info, Mailer, 'Discovering settings for $email');
    final config = await Discover.discover(email);
    if (config == null) {
      Logger.log(LoggerType.info, Mailer,
          'Unable to autodiscover settings for $email');
      return;
    }
    Logger.log(LoggerType.info, Mailer, 'Settings for $email : $config');
    final account = MailAccount.fromDiscoveredSettings(
        'my account', email, password, config);
    final mailClient = MailClient(account, isLogEnabled: true);
    try {
      await mailClient.connect();
      Logger.log(LoggerType.info, Mailer, 'Connected to $email');
      await mailClient.selectInbox();
      mailClient.eventBus.on<ImapEvent>().listen((ImapEvent event) async {
        if (event.eventType == ImapEventType.exists) {
          final evt = event as ImapMessagesExistEvent;
          if (evt.newMessagesExists <= evt.oldMessagesExists) return;
          final sequence = MessageSequence();
          if (evt.newMessagesExists - evt.oldMessagesExists > 1) {
            sequence.addRange(evt.oldMessagesExists, evt.newMessagesExists);
          } else {
            sequence.add(evt.newMessagesExists);
          }
          final messages = await mailClient.fetchMessageSequence(sequence,
              fetchPreference: FetchPreference.full);
          for (final message in messages) {
            var mailEvt = MailLoadEvent(message, mailClient);
            var content = mailEvt.message.decodeSubject();
            var mess = mailEvt.message.decodeTextPlainPart();
            Logger.log(LoggerType.info, Mailer, 'New message $content : $mess');
            Requests.sendAlert('*$content* $mess');
          }
        }
      });
      Logger.log(LoggerType.info, Mailer, 'Start polling mail for $email');
      await mailClient.startPolling(const Duration(seconds: 30));
      Logger.log(LoggerType.info, Mailer, 'Finish polling mail for $email');
    } on MailException catch (e) {
      Logger.log(LoggerType.error, Mailer, 'High level API failed with $e');
    }
  }
}