import 'package:flutter/material.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:flutter_test/flutter_test.dart';

import 'package:miler/views/helpers/constants/app_theme.dart';
import 'package:miler/views/introscreens/introscreen.dart';

/// The first-run slides. The illustrations are miniature mock-ups of the real
/// Home screen rather than a centred Material icon, which means they are made of
/// fixed-width rows — the hub rail on slide 1 is a dozen sized children in a
/// single unflexed `Row`. That is exactly the shape that overflows on a narrow
/// phone, so every slide is laid out at the narrowest screen the app supports.
void main() {
  Future<void> pump(WidgetTester tester, {required Size screen}) async {
    tester.view.physicalSize = Size(screen.width * 3, screen.height * 3);
    tester.view.devicePixelRatio = 3.0;
    addTearDown(tester.view.resetPhysicalSize);
    addTearDown(tester.view.resetDevicePixelRatio);

    await tester.pumpWidget(
      ScreenUtilInit(
        designSize: const Size(390, 844),
        builder: (_, _) => MaterialApp(
          theme: AppTheme.light,
          home: const Introscreen(),
        ),
      ),
    );
    await tester.pumpAndSettle();
  }

  for (final size in const [
    Size(320, 640), // smallest Android still in the fleet
    Size(360, 740),
    Size(390, 844),
    Size(430, 932),
  ]) {
    testWidgets('all three slides lay out at ${size.width.toInt()}pt',
        (tester) async {
      await pump(tester, screen: size);
      expect(tester.takeException(), isNull);

      // Slide 1 — the slot, its load, and the round trip.
      expect(find.text('Your route arrives ready'), findsOneWidget);
      expect(find.text('12:00 PM – 3:00 PM'), findsOneWidget);
      expect(find.text('Next'), findsOneWidget);

      // A near-full-width drag, so the page always snaps to the next one. A
      // velocity fling does not reliably cross the threshold here, because each
      // slide hosts its own vertical scroll view and the two share the arena.
      final swipe = Offset(-size.width * 0.9, 0);

      await tester.drag(find.byType(PageView), swipe);
      await tester.pumpAndSettle();
      expect(tester.takeException(), isNull);
      expect(find.text('Work the stops in order'), findsOneWidget);
      expect(find.text('Skipped'), findsOneWidget);

      await tester.drag(find.byType(PageView), swipe);
      await tester.pumpAndSettle();
      expect(tester.takeException(), isNull);
      expect(find.text('Collect, then close the loop'), findsOneWidget);
      expect(find.text('₹340 cash'), findsOneWidget);

      // Last slide swaps the CTA and drops Skip.
      expect(find.text('Get started'), findsOneWidget);
      expect(find.text('Skip'), findsNothing);
    });
  }

  testWidgets('Skip is offered on the first slide', (tester) async {
    await pump(tester, screen: const Size(390, 844));
    expect(find.text('Skip'), findsOneWidget);
  });

  // The old copy pitched a gig marketplace — "pickups near you", accepted from a
  // feed. This product assigns routes from a hub. Onboarding that teaches the
  // wrong model is worse than none, so the wrong words are pinned out.
  testWidgets('does not promise a marketplace the app does not have',
      (tester) async {
    await pump(tester, screen: const Size(390, 844));
    for (final wrong in [
      'Find pickups near you',
      'Navigate the smart way',
      'Earn more, every shift',
      'Powered by AI',
    ]) {
      expect(find.text(wrong), findsNothing, reason: '"$wrong" is not this app');
    }
  });
}