import 'package:flutter/material.dart';

import 'package:flutter_test/flutter_test.dart';

import 'package:sxchnge_app/auth/validation.dart';
import 'package:sxchnge_app/main.dart';

import 'package:sxchnge_app/generated/i18n/app_localizations_en.dart';

Future<void> openApp(
  WidgetTester tester, {
  Size size = const Size(390, 844),
  double scale = 1,
}) async {
  tester.view.physicalSize = size;
  tester.view.devicePixelRatio = 1;
  tester.platformDispatcher.textScaleFactorTestValue = scale;
  addTearDown(tester.view.resetPhysicalSize);
  addTearDown(tester.view.resetDevicePixelRatio);
  addTearDown(tester.platformDispatcher.clearTextScaleFactorTestValue);
  await tester.pumpWidget(const SxchngeApp());
  await tester.pumpAndSettle();
}

Future<void> submit(WidgetTester tester) async {
  final button = find.byKey(const ValueKey('submit'));
  await tester.ensureVisible(button);
  await tester.tap(button);
  await tester.pumpAndSettle();
}

void main() {
  final l = AppLocalizationsEn();
  test(
    'validation rejects malformed email and mismatched signup passwords',
    () {
      for (final email in ['', 'user', 'user@', 'user @example.com']) {
        expect(AuthValidation.email(email, l), isNotNull);
      }
      expect(AuthValidation.email(' user+tag@example.com ', l), isNull);
      expect(AuthValidation.password('short', l, signUp: true), isNotNull);
      expect(AuthValidation.password('short', l, signUp: false), isNull);
      expect(
        AuthValidation.confirmation('different', 'password', l),
        isNotNull,
      );
      expect(AuthValidation.name('  ', l), isNotNull);
    },
  );

  testWidgets(
    'login validates, toggles password, and submits with the keyboard',
    (tester) async {
      await openApp(tester);
      await submit(tester);
      expect(find.text('Enter your email address.'), findsOneWidget);
      expect(find.text('Enter your password.'), findsOneWidget);
      await tester.enterText(
        find.byKey(const ValueKey('email')),
        'test@example.com',
      );
      await tester.enterText(
        find.byKey(const ValueKey('password')),
        'example-password',
      );
      await tester.tap(find.byTooltip('Show password'));
      await tester.pump();
      expect(
        tester
            .widget<TextField>(
              find.descendant(
                of: find.byKey(const ValueKey('password')),
                matching: find.byType(TextField),
              ),
            )
            .obscureText,
        isFalse,
      );
      await tester.testTextInput.receiveAction(TextInputAction.done);
      await tester.pumpAndSettle();
      expect(find.byKey(const ValueKey('preview-result')), findsOneWidget);
      expect(tester.takeException(), isNull);
    },
  );

  testWidgets(
    'signup validates confirmation and clears credentials when switching',
    (tester) async {
      await openApp(tester);
      await tester.tap(find.text('Sign up'));
      await tester.pumpAndSettle();
      await tester.enterText(find.byKey(const ValueKey('name')), 'Alex');
      await tester.enterText(
        find.byKey(const ValueKey('email')),
        'alex@example.com',
      );
      await tester.enterText(
        find.byKey(const ValueKey('password')),
        'example-password',
      );
      await tester.enterText(
        find.byKey(const ValueKey('confirmation')),
        'different',
      );
      await submit(tester);
      expect(find.text('Passwords do not match.'), findsOneWidget);
      await tester.enterText(
        find.byKey(const ValueKey('confirmation')),
        'example-password',
      );
      await submit(tester);
      expect(find.byKey(const ValueKey('verification-sent')), findsOneWidget);
      await tester.ensureVisible(
        find.byKey(const ValueKey('demo-confirmation')),
      );
      await tester.tap(find.byKey(const ValueKey('demo-confirmation')));
      await tester.pumpAndSettle();
      expect(
        find.byKey(const ValueKey('verification-verified')),
        findsOneWidget,
      );
      await tester.ensureVisible(find.text('Back to login'));
      await tester.tap(find.text('Back to login'));
      await tester.pumpAndSettle();
      expect(find.byKey(const ValueKey('confirmation')), findsNothing);
      expect(find.text('example-password'), findsNothing);
      expect(find.byKey(const ValueKey('preview-result')), findsNothing);
      expect(tester.takeException(), isNull);
    },
  );

  testWidgets('resizing preserves the selected mode and entered values', (
    tester,
  ) async {
    await openApp(tester, size: const Size(1440, 1000));
    await tester.tap(find.text('Sign up'));
    await tester.pumpAndSettle();
    await tester.enterText(
      find.byKey(const ValueKey('email')),
      'alex@example.com',
    );
    tester.view.physicalSize = const Size(390, 844);
    await tester.pumpAndSettle();
    expect(find.byKey(const ValueKey('name')), findsOneWidget);
    expect(find.text('alex@example.com'), findsOneWidget);
    expect(tester.takeException(), isNull);
  });

  for (final size in [const Size(320, 740), const Size(1440, 1000)]) {
    testWidgets('both modes fit $size at 200% text scale', (tester) async {
      await openApp(tester, size: size, scale: 2);
      expect(tester.takeException(), isNull);
      await tester.ensureVisible(find.text('Sign up'));
      await tester.tap(find.text('Sign up'));
      await tester.pumpAndSettle();
      await submit(tester);
      expect(tester.takeException(), isNull);
    });
  }
}