import 'dart:io';

import 'package:flutter_test/flutter_test.dart';
import 'package:hepan_everyday/features/school/school_exam_adapter.dart';
import 'package:hepan_everyday/domain/app_snapshot.dart';

String examHtml({String time = '', String room = '', String seat = ''}) =>
    '''
<select id="xqbh"><option value="73" selected>2026-2027秋</option></select>
<table id="sample-table-1"><thead><tr>
${['id', '序号', '学号', '姓名', '课程代码', '课程名称', '考核方式', '考生编号', '考场顺序号', '考场', '座位号', '考试时间'].map((s) => '<th>$s</th>').join()}
</tr></thead><tbody><tr>
${['1', '1', 'private-id', 'private-name', 'MATH', '矩阵理论', '笔试', '', '', room, seat, time].map((s) => '<td>$s</td>').join()}
</tr></tbody></table>''';

void main() {
  test(
    'unscheduled courses and supplied arrangement fields survive saving',
    () {
      final draft = SchoolExamAdapter.extract(examHtml());
      expect(draft.records.single.name, '矩阵理论');
      expect(draft.records.single.time, '');
      final arranged = SchoolExamAdapter.extract(
        examHtml(time: '2026-12-01 09:00–11:00', room: '品学楼A101', seat: '16'),
      );
      final saved = AppSnapshot.fromJson(
        AppSnapshot(examSchedule: arranged).toJson(),
      );
      expect(saved.examSchedule!.records.single.room, '品学楼A101');
      expect(saved.examSchedule!.records.single.seat, '16');
      expect(saved.examSchedule!.records.single.time, '2026-12-01 09:00–11:00');
      final text = saved.toJson().toString();
      expect(text, isNot(contains('private-id')));
      expect(text, isNot(contains('private-name')));
    },
  );
  test('partial exam pages cannot replace previously imported records', () {
    final headerOnly = examHtml().replaceAll(
      RegExp(r'<tbody>.*?</tbody>', dotAll: true),
      '<tbody></tbody>',
    );
    expect(() => SchoolExamAdapter.extract(headerOnly), throwsFormatException);
    expect(
      () =>
          SchoolExamAdapter.extract(examHtml().replaceFirst('<td>16</td>', '')),
      returnsNormally,
    );
    expect(
      () => SchoolExamAdapter.extract(
        examHtml().replaceFirst('<td>MATH</td>', ''),
      ),
      throwsFormatException,
    );
    expect(
      () => SchoolExamAdapter.extract('<html>登录</html>'),
      throwsFormatException,
    );
  });
  final actual = Platform.environment['RSCHEDULE_EXAM_FIXTURE'];
  if (actual != null) {
    test(
      'provided exam export has eight courses with no arrangements',
      () async {
        final draft = SchoolExamAdapter.extract(
          await File(actual).readAsString(),
        );
        expect(draft.records.length, 8);
        expect(draft.semesterLabel, '2026-2027秋');
        expect(
          draft.records.every(
            (e) => e.time.isEmpty && e.room.isEmpty && e.seat.isEmpty,
          ),
          isTrue,
        );
      },
    );
  }
}