import 'package:flutter_test/flutter_test.dart';
import 'package:webview_flutter_platform_interface/webview_flutter_platform_interface.dart';
import 'package:hepan_everyday/features/school/school_session.dart';
import 'package:hepan_everyday/features/school/school_page_probe.dart';
import 'package:hepan_everyday/domain/school_term.dart';

import 'dart:convert';

import '../support/fake_school_web.dart';
import 'recognized_timetable_test.dart' show fixture;
import 'exam_adapter_test.dart' show examHtml;

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();
  test(
    'first online import waits for an explicit term even on a ready table',
    () async {
      final platform = FakeSchoolPlatform();
      WebViewPlatform.instance = platform;
      final session = SchoolSession();
      addTearDown(session.dispose);
      await session.open();
      const url = 'https://yjsjy.uestc.edu.cn/pyxx/pygl/xskbcx/index/73';
      platform.web.url = url;
      platform.web.javascript = (_) async =>
          schoolPageEvidence(topUrl: url, authenticated: true, html: fixture());
      platform.delegate.started(url);
      platform.delegate.finished(url);
      await flushSchoolEvents();
      expect(session.pendingDraft, isNull);
      expect(session.finding, isFalse);
      expect(session.needsTermSelection, isTrue);
    },
  );

  test('signed out change waits for authentication then explicit choice before requesting exams', () async {
    final platform = FakeSchoolPlatform();
    WebViewPlatform.instance = platform;
    final session = SchoolSession();
    addTearDown(session.dispose);
    await session.openExams(term: SchoolTerm(73), chooseTerm: true);
    expect(session.needsTermSelection, isFalse);
    expect(
      platform.web.loads.single,
      'https://yjsjy.uestc.edu.cn/pyxx/jzsso/login',
    );
    const home = 'https://yjsjy.uestc.edu.cn/pyxx/home/index';
    platform.web.url = home;
    platform.web.javascript = (_) async =>
        schoolPageEvidence(topUrl: platform.web.url!, authenticated: true);
    platform.delegate.started(home);
    platform.delegate.finished(home);
    await flushSchoolEvents();
    expect(session.needsTermSelection, isTrue);
    expect(platform.web.loads.length, 1);
    await session.selectTerm(SchoolTerm(72));
    expect(
      platform.web.loads.last,
      'https://yjsjy.uestc.edu.cn/pyxx/pygl/kskcxx/index?xq=72',
    );
    expect(session.needsTermSelection, isFalse);
  });

  test('connected change prompts immediately without replacing imported data or navigating', () async {
    final platform = FakeSchoolPlatform();
    WebViewPlatform.instance = platform;
    final session = SchoolSession();
    addTearDown(session.dispose);
    session.connectionState = SchoolConnectionState.connected;
    await session.openTimetable(term: SchoolTerm(72), chooseTerm: true);
    expect(session.needsTermSelection, isTrue);
    expect(platform.web.loads, isEmpty);
    expect(session.selectedTerm, SchoolTerm(72));
    expect(session.pendingDraft, isNull);
    expect(session.termChoices.first.id, 73);
    expect(session.termChoices.last.id, 1);
    await session.selectTerm(SchoolTerm(71));
    expect(
      platform.web.loads.single,
      'https://yjsjy.uestc.edu.cn/pyxx/pygl/xskbcx/index/71',
    );
  });

  test('timetable selected DOM term must match request before an import can become pending', () async {
    final platform = FakeSchoolPlatform();
    WebViewPlatform.instance = platform;
    final session = SchoolSession();
    addTearDown(session.dispose);
    session.connectionState = SchoolConnectionState.connected;
    await session.openTimetable(term: SchoolTerm(72));
    platform.web.javascript = (_) async =>
        schoolPageEvidence(topUrl: platform.web.url!, html: fixture());
    platform.delegate.started(platform.web.url!);
    platform.delegate.finished(platform.web.url!);
    await flushSchoolEvents();
    expect(session.pendingDraft, isNull);
    platform.web.javascript = (_) async => schoolPageEvidence(
      topUrl: platform.web.url!,
      html: fixture().replaceFirst('value="73"', 'value="72"'),
    );
    await session.readCurrentPage();
    expect(session.pendingDraft?.schoolTerm, SchoolTerm(72));
  });

  test(
    'exam selected DOM term must match requested query before saving',
    () async {
      final platform = FakeSchoolPlatform();
      WebViewPlatform.instance = platform;
      final session = SchoolSession();
      addTearDown(session.dispose);
      session.connectionState = SchoolConnectionState.connected;
      await session.openExams(term: SchoolTerm(72));
      platform.web.javascript = (_) async => schoolPageEvidence(
        topUrl: platform.web.url!,
        html: examHtml(),
        kind: 'exams',
      );
      platform.delegate.started(platform.web.url!);
      platform.delegate.finished(platform.web.url!);
      await flushSchoolEvents();
      expect(session.pendingExams, isNull);
      platform.web.javascript = (_) async => schoolPageEvidence(
        topUrl: platform.web.url!,
        html: examHtml().replaceFirst('value="73"', 'value="72"'),
        kind: 'exams',
      );
      await session.readCurrentPage();
      expect(session.pendingExams?.termId, '72');
    },
  );

  test(
    're-authentication retains chosen term and unfinished picker intent',
    () async {
      final platform = FakeSchoolPlatform();
      WebViewPlatform.instance = platform;
      final session = SchoolSession();
      addTearDown(session.dispose);
      session.connectionState = SchoolConnectionState.connected;
      await session.openExams(term: SchoolTerm(72), chooseTerm: true);
      await session.openAuthentication();
      expect(session.needsTermSelection, isFalse);
      expect(session.selectedTerm, SchoolTerm(72));
      const home = 'https://yjsjy.uestc.edu.cn/pyxx/home/index';
      platform.web.url = home;
      platform.web.javascript = (_) async =>
          schoolPageEvidence(topUrl: home, authenticated: true);
      platform.delegate.started(home);
      platform.delegate.finished(home);
      await flushSchoolEvents();
      expect(session.needsTermSelection, isTrue);
      await session.selectTerm(SchoolTerm(71));
      await session.openAuthentication();
      expect(session.selectedTerm, SchoolTerm(71));
      expect(session.needsTermSelection, isFalse);
      platform.web.url = home;
      platform.delegate.started(home);
      platform.delegate.finished(home);
      await flushSchoolEvents();
      expect(
        platform.web.loads.last,
        'https://yjsjy.uestc.edu.cn/pyxx/pygl/kskcxx/index?xq=71',
      );
    },
  );

  test('live dropdown choices are validated, deduplicated and sorted without private fields', () {
    final uri = Uri.parse('https://yjsjy.uestc.edu.cn/pyxx/home/index');
    final evidence = SchoolPageEvidence.decode(
      jsonEncode({
        'topUrl': uri.toString(),
        'authenticated': true,
        'pages': [],
        'terms': [72, 73, 72, 0, -1, 10000, 'private-value'],
      }),
      uri,
    );
    expect(evidence.terms.map((term) => term.id), [73, 72]);
  });
}