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

/// The accent stripe on the Bookings stop card is a `Container` with a width
/// and no height, laid out by `Row(crossAxisAlignment: stretch)`. That idiom is
/// a trap inside a `ListView`: stretch sizes children to the Row's own
/// cross-axis extent, which in a scrollable is UNBOUNDED, so the stripe is
/// asked to be infinitely tall and the entire card fails to lay out.
///
/// It fails silently in the worst possible way — the progress rail above the
/// list is a separate widget reading the same data, so it kept showing the
/// right stop count while every card rendered as nothing. That looked exactly
/// like "the bookings data is broken", and three rounds of data fixes chased
/// it before the layout was suspected.
///
/// PickupCard itself is private to the `pickups.dart` library and cannot be
/// imported, so these tests pin the idiom rather than the widget.
void main() {
  Widget inList(Widget child) => MaterialApp(
    home: Scaffold(body: ListView(children: [child])),
  );

  Widget stripeRow({required bool withIntrinsicHeight}) {
    final row = Row(
      crossAxisAlignment: CrossAxisAlignment.stretch,
      children: [
        Container(width: 4, color: const Color(0xFF960019)),
        const Expanded(
          child: Padding(
            padding: EdgeInsets.all(12),
            child: Text('Sri Balaji Stores\n19, Thadagam Road'),
          ),
        ),
      ],
    );
    return Container(
      margin: const EdgeInsets.all(8),
      child: ClipRRect(
        borderRadius: BorderRadius.circular(15),
        child: withIntrinsicHeight ? IntrinsicHeight(child: row) : row,
      ),
    );
  }

  testWidgets('a stretch Row with a height-less child breaks in a ListView', (
    tester,
  ) async {
    await tester.pumpWidget(inList(stripeRow(withIntrinsicHeight: false)));
    expect(
      tester.takeException(),
      isNotNull,
      reason: 'this is the shape that made every stop card disappear',
    );
  });

  testWidgets('IntrinsicHeight gives stretch something finite to stretch to', (
    tester,
  ) async {
    await tester.pumpWidget(inList(stripeRow(withIntrinsicHeight: true)));
    expect(tester.takeException(), isNull);

    // And the card has real height — an invisible zero-height card would pass
    // an exception check while still showing the rider nothing.
    final size = tester.getSize(find.byType(IntrinsicHeight));
    expect(size.height, greaterThan(20));

    // The stripe spans the full card height rather than collapsing.
    final stripe = tester.getSize(
      find
          .descendant(
            of: find.byType(IntrinsicHeight),
            matching: find.byType(Container),
          )
          .first,
    );
    expect(stripe.height, size.height);
    expect(stripe.width, 4);
  });
}