import 'package:flutter_test/flutter_test.dart';
import 'package:kooltab2/models/closed_tab_item.dart';
import 'package:kooltab2/utils/history_grouping.dart';

void main() {
  test('groups items by purchase day with newest day first', () {
    final items = [
      _closedItem('older', DateTime(2026, 8, 1, 22)),
      _closedItem('newer-b', DateTime(2026, 8, 3, 18)),
      _closedItem('newer-a', DateTime(2026, 8, 3, 10)),
    ];

    final groups = groupClosedTabItemsByDay(
      items,
      fallbackDate: DateTime(2026, 8, 4),
    );

    expect(groups, hasLength(2));
    expect(groups.first.day, DateTime(2026, 8, 3));
    expect(groups.first.items.map((item) => item.id), ['newer-b', 'newer-a']);
    expect(groups.last.day, DateTime(2026, 8, 1));
  });
}

ClosedTabItem _closedItem(String id, DateTime purchasedAt) {
  return ClosedTabItem(
    id: id,
    closedTabId: 'closed-tab',
    productId: 'product-$id',
    productName: id,
    quantity: 1,
    unitPriceInCents: 100,
    purchasedAt: purchasedAt,
  );
}