import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:krow_worker_app/core/theme.dart';
import 'package:krow_worker_app/widgets/common.dart';
import 'package:krow_worker_app/widgets/glass_segments.dart';
import 'package:krow_worker_app/widgets/krow_nav_bar.dart';

Widget wrap(Widget child) => MaterialApp(
  theme: buildKrowTheme(),
  home: Scaffold(body: child),
);

void main() {
  group('KrowNavBar', () {
    const items = [
      KrowNavItem(icon: Icons.home, label: 'Today'),
      KrowNavItem(icon: Icons.work, label: 'Shifts'),
      KrowNavItem(icon: Icons.timer, label: 'Clock', showDot: true),
    ];

    testWidgets('renders every label', (tester) async {
      await tester.pumpWidget(
        wrap(KrowNavBar(items: items, currentIndex: 0, onSelect: (_) {})),
      );

      expect(find.text('Today'), findsOneWidget);
      expect(find.text('Shifts'), findsOneWidget);
      expect(find.text('Clock'), findsOneWidget);
    });

    testWidgets('reports the tapped index', (tester) async {
      var selected = -1;
      await tester.pumpWidget(
        wrap(
          KrowNavBar(
            items: items,
            currentIndex: 0,
            onSelect: (i) => selected = i,
          ),
        ),
      );

      await tester.tap(find.text('Clock'));
      expect(selected, 2);
    });

    testWidgets('announces a tab that needs attention', (tester) async {
      await tester.pumpWidget(
        wrap(KrowNavBar(items: items, currentIndex: 0, onSelect: (_) {})),
      );

      // The dot is not readable, so the state has to reach the semantics tree.
      expect(find.bySemanticsLabel('Clock, needs attention'), findsOneWidget);
      expect(find.bySemanticsLabel('Today'), findsOneWidget);
    });

    testWidgets('the indicator travels rather than jumping', (tester) async {
      var index = 0;
      await tester.pumpWidget(
        wrap(
          StatefulBuilder(
            builder: (context, setState) => KrowNavBar(
              items: items,
              currentIndex: index,
              onSelect: (i) => setState(() => index = i),
            ),
          ),
        ),
      );

      Rect pillRect() => tester.getRect(find.byKey(KrowNavBar.indicatorKey));

      final start = pillRect().center.dx;
      await tester.tap(find.text('Clock'));
      await tester.pump();
      await tester.pump(const Duration(milliseconds: 120));

      // Part way through it should be between the two tabs, not already there.
      final middle = pillRect().center.dx;
      expect(middle, greaterThan(start));

      await tester.pumpAndSettle();
      final end = pillRect().center.dx;
      expect(end, greaterThan(middle));
    });
  });

  group('StatSlabRow', () {
    // Every real use sits in a scrolling column, where the height is
    // unbounded. Testing it against a bounded Scaffold body hides exactly the
    // layout errors this row is prone to.
    Widget inScrollable(Widget child) =>
        wrap(ListView(children: [const SizedBox(height: 8), child]));

    testWidgets('lays out inside a scrollable', (tester) async {
      await tester.pumpWidget(
        inScrollable(
          const StatSlabRow(
            slabs: [
              StatSlab('Clock in', '6:01 PM'),
              StatSlab('Clock out', '11:50 PM'),
              StatSlab('Hours', '5h 19m'),
            ],
          ),
        ),
      );

      expect(tester.takeException(), isNull);
      // A row that tried to fill unbounded height would be enormous.
      expect(tester.getSize(find.byType(StatSlabRow)).height, lessThan(120));
    });

    testWidgets('keeps every card the same height, however long the text', (
      tester,
    ) async {
      await tester.pumpWidget(
        inScrollable(
          const StatSlabRow(
            slabs: [
              // The middle one is what used to wrap on both lines and push
              // its card taller than the two beside it.
              StatSlab('Clock in', '6:01 PM'),
              StatSlab('Clock out', '11:50 PM'),
              StatSlab('Hours', '5h 19m'),
            ],
          ),
        ),
      );

      final heights = tester
          .widgetList<StatSlab>(find.byType(StatSlab))
          .map((slab) => tester.getSize(find.byWidget(slab)).height)
          .toSet();

      expect(heights.length, 1, reason: 'cards should be one height');
    });

    testWidgets('scales long values down instead of wrapping', (tester) async {
      await tester.pumpWidget(
        inScrollable(
          const StatSlabRow(
            slabs: [
              StatSlab('Paid', r'$1,234.56'),
              StatSlab('Rate', r'$21.00/hr'),
              StatSlab('Hours', '5h 19m'),
            ],
          ),
        ),
      );

      for (final text in tester.widgetList<Text>(find.byType(Text))) {
        expect(text.maxLines, 1);
      }
    });
  });

  group('GlassSegments', () {
    testWidgets('reports the tapped segment', (tester) async {
      String? picked;
      await tester.pumpWidget(
        wrap(
          GlassSegments<String>(
            segments: const [('a', 'Week'), ('b', 'Month'), ('c', 'Year')],
            value: 'a',
            onChanged: (v) => picked = v,
          ),
        ),
      );

      await tester.tap(find.text('Year'));
      expect(picked, 'c');
    });

    testWidgets('ignores a tap on the segment already selected', (
      tester,
    ) async {
      var calls = 0;
      await tester.pumpWidget(
        wrap(
          GlassSegments<String>(
            segments: const [('a', 'Week'), ('b', 'Month')],
            value: 'a',
            onChanged: (_) => calls++,
          ),
        ),
      );

      await tester.tap(find.text('Week'));
      expect(calls, 0);

      await tester.tap(find.text('Month'));
      expect(calls, 1);
    });
  });
}