import 'package:flutter_test/flutter_test.dart';
import 'package:myapp/models/overview_favourite.dart';
import 'package:myapp/models/transaction_meta.dart';
import 'package:myapp/widgets/label_filter_dialog.dart';

void main() {
  test('OverviewFavourite JSON round-trips', () {
    const fav = OverviewFavourite(
      id: 'fav_1',
      name: 'Groceries',
      display: true,
      metric: OverviewMetricMode.labels,
      period: OverviewPeriodMode.monthly,
      labelIds: ['groceries', 'custom_ah'],
      flow: TxFlowFilter.expense,
      barStyle: LabelChartBarStyle.stacked,
      invertExpensePerspective: false,
      updatedAt: 100,
      deleted: false,
    );

    final restored = OverviewFavourite.fromJson(fav.toJson());
    expect(restored.id, fav.id);
    expect(restored.name, fav.name);
    expect(restored.display, isTrue);
    expect(restored.metric, OverviewMetricMode.labels);
    expect(restored.period, OverviewPeriodMode.monthly);
    expect(restored.labelIds, ['groceries', 'custom_ah']);
    expect(restored.flow, TxFlowFilter.expense);
    expect(restored.barStyle, LabelChartBarStyle.stacked);
    expect(restored.updatedAt, 100);
    expect(restored.deleted, isFalse);
  });

  test('mergeOverviewFavourites unions by id with last-write-wins', () {
    const local = OverviewFavourite(
      id: 'fav_1',
      name: 'Local name',
      display: true,
      updatedAt: 200,
    );
    const remoteOnly = OverviewFavourite(
      id: 'fav_2',
      name: 'Remote only',
      display: false,
      metric: OverviewMetricMode.labels,
      updatedAt: 50,
    );
    const remoteConflictOlder = OverviewFavourite(
      id: 'fav_1',
      name: 'Remote name',
      display: false,
      updatedAt: 100,
    );
    const remoteConflictNewer = OverviewFavourite(
      id: 'fav_3',
      name: 'Remote newer',
      display: true,
      updatedAt: 300,
    );
    const localOlder = OverviewFavourite(
      id: 'fav_3',
      name: 'Local older',
      display: false,
      updatedAt: 10,
    );

    final merged = mergeOverviewFavourites(
      [local, localOlder],
      [remoteConflictOlder, remoteOnly, remoteConflictNewer],
    );

    expect(merged.length, 3);
    final byId = {for (final f in merged) f.id: f};
    expect(byId['fav_1']!.name, 'Local name');
    expect(byId['fav_1']!.display, isTrue);
    expect(byId['fav_2']!.name, 'Remote only');
    expect(byId['fav_3']!.name, 'Remote newer');
  });
}