import 'dart:io';

import 'package:flutter_test/flutter_test.dart';
import 'package:hepan_everyday/features/school/school_page_adapter.dart';
import 'package:hepan_everyday/domain/course.dart';

String fixture() {
  const records = {
    't51': '101/示例集成电路设计(1班)/32/2/示例教师甲/1-3周/1~2节/示例楼B212<br>101/示例集成电路设计(1班)/32/2/示例教师甲/6-6周/1~2节/示例楼B212<br>101/示例集成电路设计(1班)/32/2/示例教师甲/7-9周/1~2节/示例楼B212',
    't13': '101/示例集成电路设计(1班)/32/2/示例教师甲/1-5周/3~4节/示例楼B212',
    't23': '102/示例信号检测与估计(2班)/32/2/示例教师乙、示例教师丙/1-5周/3~4节/示例楼B102<br>102/示例信号检测与估计(2班)/32/2/示例教师乙、示例教师丙/7-9周/3~4节/示例楼B102',
    't29': '103/示例现代化理论与实践(3班)/36/2/示例教师丁/1-12周/9~11节/示例楼B107',
  };
  return '<select id="drpxq"><option value="73" selected>2026-2027秋</option></select><table id="tbl"><tr><th>节次</th>${['一', '二', '三', '四', '五', '六', '日'].map((d) => '<th>星期$d</th>').join()}</tr>${[1, 3, 5, 7, 9].map((p) => '<tr><td id="t0$p">$p-${p == 9 ? 11 : p + 1}节</td>${List.generate(7, (i) => '<td id="t${i + 1}$p">${records['t${i + 1}$p'] ?? ''}</td>').join()}</tr>').join()}</table>';
}

void main() {
  final url = Uri.parse('https://yjsjy.uestc.edu.cn/pyxx/pygl/xskbcx/index/1');
  test('graduate course identifiers need not be numeric and missing rooms remain explicit', () {
    final body = fixture()
        .replaceAll('101/示例', 'G101/示例')
        .replaceAll('/示例楼B212', '/');
    final draft = SchoolPageAdapter().extract(body, url);
    expect(draft.courses, hasLength(4));
    final pending = draft.courses.where((c) => c.name.contains('集成电路'));
    expect(pending.every((c) => c.room == '教室待定'), isTrue);
    expect(pending.every((c) => c.notes.contains('学校未提供教室')), isTrue);
  });
  test('graduate malformed record provides a safe specific reason', () {
    expect(
      () => SchoolPageAdapter().extract(
        fixture().replaceFirst('1-3周', '未知周'),
        url,
      ),
      throwsA(
        isA<UnsupportedSchoolLayout>().having(
          (e) => e.toString(),
          'reason',
          contains('上课周次'),
        ),
      ),
    );
  });
  test('school DOM merges week segments without losing full metadata or evening periods', () {
    final draft = SchoolPageAdapter().extract(fixture(), url);
    expect(draft.courses.length, 4);
    final friday = draft.courses.singleWhere((c) => c.weekday == 5);
    expect(friday.weeks, {1, 2, 3, 6, 7, 8, 9});
    final signal = draft.courses.singleWhere(
      (c) => c.weekday == 2 && c.startPeriod == 3,
    );
    expect(signal.teacher, '示例教师乙、示例教师丙');
    expect(signal.room, '示例楼B102');
    final evening = draft.courses.singleWhere((c) => c.startPeriod == 9);
    expect(evening.endPeriod, 11);
    expect(draft.source, CourseSource.school);
    expect(draft.explicitlyEmpty, isFalse);
    expect(
      SchoolPageAdapter().extract(fixture(), url).courses.map((c) => c.id),
      draft.courses.map((c) => c.id),
    );
  });
  test('invalid cell, missing weekday, mismatched period and empty grid fail closed', () {
    for (final body in [
      fixture().replaceFirst('1-3周', '未知周'),
      fixture().replaceFirst('id="t71"', 'id="missing"'),
      fixture().replaceFirst('1~2节', '5~6节'),
      fixture().replaceAll(RegExp(r'\d+/示例[^<]+'), ''),
      fixture().replaceFirst('星期日', '星期八'),
    ]) {
      expect(
        () => SchoolPageAdapter().extract(body, url),
        throwsA(isA<UnsupportedSchoolLayout>()),
      );
    }
  });
  test('saved HTML uses file provenance and does not authenticate a school session', () {
    final draft = SchoolPageAdapter().extract(
      fixture(),
      url,
      source: CourseSource.file,
    );
    expect(draft.source, CourseSource.file);
    expect(draft.courses.every((c) => c.source == CourseSource.file), isTrue);
  });
  test('actual attached HTML imports eleven arrangements (local optional verification)', () {
    final file = File(
      Platform.environment['RIVERSIDE_HTML_FIXTURE'] ?? 'not-present',
    );
    if (!file.existsSync()) return;
    final draft = SchoolPageAdapter().extract(file.readAsStringSync(), url);
    expect(draft.courses.length, 11);
    expect(draft.courses.map((c) => c.name).toSet().length, 7);
    expect(
      draft.courses
          .singleWhere((c) => c.weekday == 2 && c.startPeriod == 9)
          .endPeriod,
      11,
    );
    expect(
      draft.courses
          .singleWhere((c) => c.weekday == 2 && c.startPeriod == 3)
          .teacher
          .split('、')
          .length,
      2,
    );
  });
}