import 'dart:convert';
import 'dart:io';

import 'package:flutter_test/flutter_test.dart';
import 'package:hepan_everyday/services/school_page_diagnostic.dart';
import 'package:hepan_everyday/features/school/undergraduate/timetable_adapter.dart';
import 'package:hepan_everyday/features/school/school_page_adapter.dart';
import 'package:hepan_everyday/features/school/school_exam_adapter.dart';

import '../school/recognized_timetable_test.dart' show fixture;
import '../school/exam_adapter_test.dart' show examHtml;

void exportContractFixture(String name, List<int> bytes) {
  final directory = Platform.environment['TPSCHEDULE_DIAGNOSTIC_EXPORT_DIR'];
  if (directory != null) File('$directory/$name').writeAsBytesSync(bytes);
}

void main() {
  test(
    'graduate timetable preserves term, periods and course parser evidence',
    () {
      final store = SchoolPageDiagnostic();
      addTearDown(store.clear);
      final uri = Uri.parse(
        'https://yjsjy.uestc.edu.cn/pyxx/pygl/xskbcx/index/73',
      );
      store.remember(
        '''<header>ACCOUNT_SECRET</header>${fixture()}
      <input name="ticket" value="AUTH_SECRET"><script>const cookie="AUTH_SECRET";</script>''',
        uri,
      );
      expect(store.export(), isNotNull);
      final output = utf8.decode(store.export()!);
      exportContractFixture('client-graduate-timetable.html', store.export()!);
      final draft = SchoolPageAdapter().extract(output, uri);
      expect(draft.schoolTerm!.id, 73);
      expect(draft.courses, hasLength(4));
      expect(
        draft.courses
            .singleWhere((c) => c.weekday == 2 && c.startPeriod == 3)
            .teacher,
        '示例教师乙、示例教师丙',
      );
      expect(output, isNot(contains('SECRET')));
      expect(output, isNot(contains('name="ticket"')));
    },
  );
  test('graduate exams preserve pending arrangements and selected term', () {
    final store = SchoolPageDiagnostic();
    addTearDown(store.clear);
    store.remember(
      examHtml(room: '示例考场'),
      Uri.parse('https://yjsjy.uestc.edu.cn/pyxx/pygl/kskcxx/index?xq=73'),
    );
    expect(store.export(), isNotNull);
    exportContractFixture('client-graduate-exams.html', store.export()!);
    final exam = SchoolExamAdapter.extract(utf8.decode(store.export()!));
    expect(exam.termId, '73');
    expect(exam.records.single.room, '示例考场');
    expect(exam.records.single.time, isEmpty);
  });
  test(
    'graduate HTTP frame and malformed parser fields remain diagnosable',
    () {
      final store = SchoolPageDiagnostic();
      addTearDown(store.clear);
      final uri = Uri.parse('http://yjsjy.uestc.edu.cn/pyxx/home/index');
      final malformed = fixture().replaceFirst('1-3周', '未知周');
      store.remember(malformed, uri);
      expect(store.export(), isNotNull);
      final output = utf8.decode(store.export()!);
      expect(output, contains('未知周'));
      expect(
        () => SchoolPageAdapter().extract(
          output,
          Uri.parse('https://yjsjy.uestc.edu.cn/pyxx/pygl/xskbcx/index/73'),
        ),
        throwsA(isA<UnsupportedSchoolLayout>()),
      );
      for (final address in [
        'https://yjsjy.uestc.edu.cn.evil.test/pyxx/home/index',
        'https://yjsjy.uestc.edu.cn:444/pyxx/home/index',
        'http://yjsjy.uestc.edu.cn:8080/pyxx/home/index',
        'https://user@yjsjy.uestc.edu.cn/pyxx/home/index',
        'https://yjsjy.uestc.edu.cn/other/index',
      ]) {
        store.remember(fixture(), Uri.parse(address));
        expect(store.export(), isNull, reason: address);
      }
      store.remember('<input type="password">${fixture()}', uri);
      expect(store.export(), isNull);
    },
  );
  test('graduate export removes events, URLs and account controls and expires at ten minutes', () {
    var now = DateTime.utc(2026, 10, 24);
    final store = SchoolPageDiagnostic(clock: () => now);
    addTearDown(store.clear);
    store.remember(
      fixture()
          .replaceFirst(
            '<select id="drpxq">',
            '<select id="drpxq" onchange="AUTH_SECRET()">',
          )
          .replaceFirst(
            '示例教师甲',
            '<a href="https://evil.test/?ticket=AUTH_SECRET" onclick="AUTH_SECRET()">示例教师甲</a><input name="cookie" value="AUTH_SECRET">',
          ),
      Uri.parse('https://yjsjy.uestc.edu.cn/pyxx/pygl/xskbcx/index/73'),
    );
    expect(store.export(), isNotNull);
    final output = utf8.decode(store.export()!);
    expect(output, isNot(contains('AUTH_SECRET')));
    expect(output, isNot(contains('evil.test')));
    expect(output, isNot(contains('onchange')));
    expect(output, contains('示例教师甲'));
    now = now.add(const Duration(minutes: 10));
    expect(store.export(), isNull);
  });
  final uri = Uri.parse(
    'https://eams.uestc.edu.cn/eams/courseTableForStd.action',
  );
  test(
    'leading comments do not remove course declarations from the evidence',
    () {
      final store = SchoolPageDiagnostic();
      addTearDown(store.clear);
      final source = File('test/fixtures/school/undergraduate-timetable.html')
          .readAsStringSync()
          .replaceFirst(
            'var unitCount = 12;',
            '// units; keep this declaration\nvar unitCount = 12;',
          )
          .replaceAll(
            'activity = new TaskActivity',
            '/* course; declaration */activity = new TaskActivity',
          );
      expect(
        UndergraduateTimetableAdapter.extract(source, uri).courses,
        hasLength(18),
      );
      store.remember(source, uri);
      expect(
        UndergraduateTimetableAdapter.extract(
          utf8.decode(store.export()!),
          uri,
        ).courses,
        hasLength(18),
      );
    },
  );
  test('malformed activity and index statements remain malformed in the exported evidence', () {
    final store = SchoolPageDiagnostic();
    addTearDown(store.clear);
    final fixture = File('test/fixtures/school/undergraduate-timetable.html')
        .readAsStringSync();
    for (final bad in [
      fixture.replaceFirst('"教师1"', 'null'),
      fixture.replaceFirst('2*unitCount+0', 'unknown()'),
    ]) {
      expect(
        () => UndergraduateTimetableAdapter.extract(bad, uri),
        throwsFormatException,
      );
      store.remember(bad, uri);
      final output = utf8.decode(store.export()!);
      expect(
        () => UndergraduateTimetableAdapter.extract(output, uri),
        throwsFormatException,
      );
      expect(output, contains(bad.contains('null') ? 'null' : 'unknown()'));
    }
  });
  test('diagnostic snapshot preserves parser evidence but removes login material and active HTML', () {
    var now = DateTime.utc(2026, 10, 16, 5);
    final store = SchoolPageDiagnostic(clock: () => now);
    final fixture = File('test/fixtures/school/undergraduate-timetable.html')
        .readAsStringSync();
    store.remember(
      '''$fixture<input name="password" value="SECRET"><input name="params" value="ticket=SECRET"><a href="https://evil.test/?ticket=SECRET" onclick="steal()">链接</a><script>var token="SECRET";</script>''',
      uri,
    );
    final output = utf8.decode(store.export()!);
    expect(output, isNot(contains('SECRET')));
    expect(output, isNot(contains('onclick')));
    expect(output, isNot(contains('evil.test')));
    expect(output, contains('Content-Security-Policy'));
    expect(
      UndergraduateTimetableAdapter.extract(output, uri).courses,
      hasLength(18),
    );
    now = now.add(const Duration(minutes: 11));
    expect(store.export(), isNull);
  });
  test('only trusted school evidence can be kept and logout clears it', () {
    final store = SchoolPageDiagnostic();
    store.remember('<table id="manualArrangeCourseTable"></table>', uri);
    expect(store.export(), isNotNull);
    store.clear();
    expect(store.export(), isNull);
    store.remember(
      '<table>secret</table>',
      Uri.parse('https://idas.uestc.edu.cn/authserver/login'),
    );
    expect(store.export(), isNull);
    store.remember(
      '<input type="password"><table id="manualArrangeCourseTable"></table>',
      uri,
    );
    expect(store.export(), isNull);
  });
}