import 'package:flutter_test/flutter_test.dart';
import 'package:mail_hub/core/protocol/imap/imap_parser.dart';

void main() {
  group('IMAP 响应解析', () {
    test('FETCH 带字面量（HEADER + TEXT）', () {
      final header = 'Subject: test\r\nFrom: a@b.com\r\n';
      final text = 'Hello World!';
      final parts = [
        ImapPart('* 1 FETCH (UID 5 BODY[HEADER] {${header.length}}', header.codeUnits),
        ImapPart(' BODY[TEXT] {${text.length}}', text.codeUnits),
        ImapPart(' FLAGS (\\Seen))'),
      ];
      final fd = ImapParser.parseFetch(parts)!;
      expect(fd.uid, 5);
      expect(fd.seen, true);
      expect(String.fromCharCodes(fd.bodies['HEADER']!), contains('Subject: test'));
      expect(String.fromCharCodes(fd.bodies['TEXT']!), 'Hello World!');
    });

    test('FETCH 部分抓取 <0.100>', () {
      final parts = [
        ImapPart('* 2 FETCH (UID 9 BODY[TEXT]<0.100> {5}', 'hello'.codeUnits),
        ImapPart(')'),
      ];
      final fd = ImapParser.parseFetch(parts)!;
      expect(fd.uid, 9);
      expect(String.fromCharCodes(fd.bodies['TEXT']!), 'hello');
    });

    test('SEARCH 结果', () {
      final lines = ['* SEARCH 1 2 3', '* SEARCH 4 5'];
      expect(ImapParser.parseSearch(lines), [1, 2, 3, 4, 5]);
    });

    test('LIST 文件夹', () {
      final lines = [
        r'* LIST (\HasNoChildren) "/" "INBOX"',
        r'* LIST (\HasChildren \Noselect) "/" "[Gmail]"',
      ];
      final list = ImapParser.parseList(lines);
      expect(list.length, 2);
      expect(list[0].name, 'INBOX');
      expect(list[0].delim, '/');
      expect(list[1].attrs, contains(r'\Noselect'));
    });

    test('STATUS 解析', () {
      final map = ImapParser.parseStatus(
          '* STATUS INBOX (MESSAGES 231 UNSEEN 4 UIDNEXT 44292)');
      expect(map!['MESSAGES'], 231);
      expect(map['UNSEEN'], 4);
      expect(map['UIDNEXT'], 44292);
    });

    test('状态响应 OK/NO', () {
      final ok = ImapStatus.parse('a1 OK [READ-WRITE] SELECT completed');
      expect(ok.ok, true);
      expect(ok.responseCode, 'READ-WRITE');
      final no = ImapStatus.parse('a2 NO [AUTHENTICATIONFAILED] Invalid credentials');
      expect(no.ok, false);
      expect(no.responseCode, 'AUTHENTICATIONFAILED');
    });

    test('INTERNALDATE 解析', () {
      final fd = ImapParser.parseFetch([
        ImapPart('* 1 FETCH (UID 5 INTERNALDATE "17-Aug-2026 08:23:45 +0800")'),
      ])!;
      expect(fd.internalDate, isNotNull);
      expect(fd.internalDate!.year, 2026);
      expect(fd.internalDate!.month, 8);
    });
  });
}