import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:google_fonts/google_fonts.dart';
import 'package:plasmoid/main.dart';
import 'package:plasmoid/preferences.dart';
import 'package:plasmoid/settings.dart';
import 'package:provider/provider.dart';
import 'package:shared_preferences/shared_preferences.dart';

Map<String, Object?> _app(String name) => {
      'app_name': name,
      'package_name': 'com.example.${name.toLowerCase()}',
      'apk_file_path': '',
      'version_name': '1',
      'version_code': 1,
      'data_dir': '',
      'system_app': false,
      'install_time': 0,
      'update_time': 0,
      'is_enabled': true,
      'category': -1,
    };

void main() {
  final launched = <String>[];
  var installed = ['Alpha', 'Bravo', 'Charlie'];

  setUp(() async {
    launched.clear();
    installed = ['Alpha', 'Bravo', 'Charlie'];
    GoogleFonts.config.allowRuntimeFetching = false;
    SharedPreferences.setMockInitialValues({'sortLastUsed': false});
    await SharedPreferencesService().initialize();
    final messenger = TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger;
    messenger.setMockMethodCallHandler(const MethodChannel('g123k/device_apps'), (call) async {
      switch (call.method) {
        case 'getInstalledApps':
          return installed.map(_app).toList();
        case 'openApp':
          launched.add((call.arguments as Map)['package_name'] as String);
          return true;
      }
      return null;
    });
    messenger.setMockStreamHandler(const EventChannel('g123k/device_apps_events'), MockStreamHandler.inline(onListen: (_, __) {}));
  });

  Future<void> pumpLauncher(WidgetTester tester) async {
    await tester.pumpWidget(ChangeNotifierProvider(
      create: (_) => AppSettings(),
      child: MaterialApp(home: AppLauncherScreen()),
    ));
    await tester.pumpAndSettle();
  }

  Future<void> press(WidgetTester tester, LogicalKeyboardKey key) async {
    await tester.sendKeyEvent(key);
    await tester.pumpAndSettle();
  }

  Future<void> hold(WidgetTester tester, LogicalKeyboardKey key) async {
    await tester.sendKeyDownEvent(key);
    await tester.pump(const Duration(seconds: 1));
    await tester.sendKeyUpEvent(key);
    await tester.pumpAndSettle();
  }

  ListTile tile(WidgetTester tester, String name) =>
      tester.widget<ListTile>(find.ancestor(of: find.text(name), matching: find.byType(ListTile)));

  EditableText searchField(WidgetTester tester) => tester.widget<EditableText>(find.byType(EditableText));

  testWidgets('down enters the list and up/down move the selection', (tester) async {
    await pumpLauncher(tester);
    expect(searchField(tester).focusNode.hasFocus, isTrue);

    await press(tester, LogicalKeyboardKey.arrowDown);
    expect(searchField(tester).focusNode.hasFocus, isFalse);
    expect(tile(tester, 'Alpha').selected, isTrue);

    await press(tester, LogicalKeyboardKey.arrowDown);
    await press(tester, LogicalKeyboardKey.arrowDown);
    await press(tester, LogicalKeyboardKey.arrowDown);
    expect(tile(tester, 'Charlie').selected, isTrue);

    await press(tester, LogicalKeyboardKey.arrowUp);
    expect(tile(tester, 'Bravo').selected, isTrue);

    await press(tester, LogicalKeyboardKey.select);
    expect(launched, ['com.example.bravo']);
  });

  testWidgets('left returns focus to the search field', (tester) async {
    await pumpLauncher(tester);
    await press(tester, LogicalKeyboardKey.arrowDown);
    await press(tester, LogicalKeyboardKey.arrowLeft);
    expect(searchField(tester).focusNode.hasFocus, isTrue);
    expect(tile(tester, 'Alpha').selected, isFalse);
  });

  testWidgets('right clears the search text, then opens and focuses the menu', (tester) async {
    await pumpLauncher(tester);
    await tester.enterText(find.byType(TextField), 'al');
    await tester.pumpAndSettle();

    await press(tester, LogicalKeyboardKey.arrowRight);
    expect(searchField(tester).controller.text, isEmpty);

    await press(tester, LogicalKeyboardKey.arrowRight);
    expect(find.text('Refresh App List'), findsOneWidget);
    final focused = FocusManager.instance.primaryFocus!.context!;
    expect(find.descendant(of: find.byWidget(focused.widget), matching: find.text('Refresh App List')), findsOneWidget);
  });

  testWidgets('right in the list opens the menu', (tester) async {
    await pumpLauncher(tester);
    await press(tester, LogicalKeyboardKey.arrowDown);
    await press(tester, LogicalKeyboardKey.arrowRight);
    expect(find.text('Refresh App List'), findsOneWidget);
  });

  testWidgets('long left pins and long right demotes the selected app', (tester) async {
    await pumpLauncher(tester);
    await press(tester, LogicalKeyboardKey.arrowDown);
    await press(tester, LogicalKeyboardKey.arrowDown);
    await press(tester, LogicalKeyboardKey.arrowDown);

    await hold(tester, LogicalKeyboardKey.arrowLeft);
    expect(SharedPreferencesService().getBool('isPinned_com.example.charlie', false), isTrue);
    expect(tile(tester, 'Charlie').selected, isTrue);
    expect(searchField(tester).focusNode.hasFocus, isFalse);

    await hold(tester, LogicalKeyboardKey.arrowRight);
    expect(SharedPreferencesService().getBool('isPinned_com.example.charlie', false), isFalse);

    await hold(tester, LogicalKeyboardKey.arrowRight);
    expect(SharedPreferencesService().getBool('isDemoted_com.example.charlie', false), isTrue);
    expect(tile(tester, 'Charlie').selected, isTrue);
    expect(find.text('Refresh App List'), findsNothing);
  });

  testWidgets('long center toggles the context menu with focus on it', (tester) async {
    await pumpLauncher(tester);
    await press(tester, LogicalKeyboardKey.arrowDown);

    await hold(tester, LogicalKeyboardKey.select);
    expect(find.text('Edit Tags'), findsOneWidget);
    expect(find.text('Edit Tags for Alpha'), findsNothing);
    final focused = FocusManager.instance.primaryFocus!.context!;
    expect(find.descendant(of: find.byWidget(focused.widget), matching: find.text('Edit Tags')), findsOneWidget);

    await hold(tester, LogicalKeyboardKey.select);
    expect(find.text('Edit Tags'), findsNothing);
    expect(launched, isEmpty);
  });

  testWidgets('moving the selection scrolls it into view', (tester) async {
    installed = [for (var i = 10; i < 70; i++) 'App$i'];
    await pumpLauncher(tester);
    await press(tester, LogicalKeyboardKey.arrowDown);
    for (var i = 0; i < 40; i++) {
      await press(tester, LogicalKeyboardKey.arrowDown);
    }
    expect(tile(tester, 'App50').selected, isTrue);
    expect(tester.getRect(find.text('App50')).bottom, lessThanOrEqualTo(tester.view.physicalSize.height / tester.view.devicePixelRatio));

    await press(tester, LogicalKeyboardKey.arrowLeft);
    await press(tester, LogicalKeyboardKey.arrowDown);
    expect(tile(tester, 'App10').selected, isTrue);
  });
}