import 'package:flutter_test/flutter_test.dart';
import 'package:life_helper/domain/models/habit.dart';
import 'package:life_helper/domain/models/tracker_entry.dart';
import 'package:life_helper/domain/streak/weekly_minimum_ratio.dart';

HabitDoseVariantModel _v(String id, {bool isMin = false}) =>
    HabitDoseVariantModel(
      variantId: id,
      habitId: 'hb',
      label: id,
      doseText: '1x',
      isMinimum: isMin,
    );

TrackerEntryModel _done(String date, {String? vId}) => TrackerEntryModel(
      id: 'te_$date',
      habitId: 'hb',
      date: date,
      value: TrackerValue.done,
      variantId: vId,
    );

void main() {
  final variantsById = {
    'min': _v('min', isMin: true),
    'full': _v('full'),
  };

  test('no done entries → ratio 0.0', () {
    final r = computeWeeklyMinimumRatio(
      entries: const [],
      variantsById: variantsById,
      asOf: DateTime(2026, 6, 11),
    );
    expect(r.totalDone, 0);
    expect(r.ratio, 0.0);
  });

  test('3 of 4 used minimum → 0.75', () {
    final r = computeWeeklyMinimumRatio(
      entries: [
        _done('2026-06-08', vId: 'min'),
        _done('2026-06-09', vId: 'min'),
        _done('2026-06-10', vId: 'full'),
        _done('2026-06-11', vId: 'min'),
      ],
      variantsById: variantsById,
      asOf: DateTime(2026, 6, 11),
    );
    expect(r.totalDone, 4);
    expect(r.minimumUsed, 3);
    expect(r.ratio, closeTo(0.75, 1e-9));
  });

  test('out-of-window entries are excluded', () {
    final r = computeWeeklyMinimumRatio(
      entries: [
        _done('2026-06-01', vId: 'min'), // 10 days before asOf
        _done('2026-06-11', vId: 'min'),
      ],
      variantsById: variantsById,
      asOf: DateTime(2026, 6, 11),
    );
    expect(r.totalDone, 1);
    expect(r.minimumUsed, 1);
  });

  test('done with null variantId counts as totalDone but not minimumUsed', () {
    final r = computeWeeklyMinimumRatio(
      entries: [
        _done('2026-06-10'),
        _done('2026-06-11', vId: 'min'),
      ],
      variantsById: variantsById,
      asOf: DateTime(2026, 6, 11),
    );
    expect(r.totalDone, 2);
    expect(r.minimumUsed, 1);
    expect(r.ratio, 0.5);
  });
}