import 'package:flutter_test/flutter_test.dart';
import 'package:rippr/src/domain/models.dart';
import 'package:rippr/src/ui/trips/trips_screen.dart';

/// UI-07: `RideHistorySummary.compute` is a pure function specifically so it can be
/// tested directly against a hand-computed total, rather than through a screen.
void main() {
  test('compute matches a hand-computed total over a fixed set of trips', () {
    final trips = [
      const Trip(
        id: 1,
        startedAt: 0,
        endedAt: 3600000,
        distanceM: 20000,
        movingMillis: 3600000,
      ),
      const Trip(
        id: 2,
        startedAt: 0,
        endedAt: 1800000,
        distanceM: 5000,
        movingMillis: 1800000,
      ),
    ];

    final summary = RideHistorySummary.compute(trips);

    expect(summary.rideCount, 2);
    expect(summary.totalDistanceM, 25000);
    expect(summary.totalMovingMillis, 5400000);
    // Distance-weighted, not an average of each ride's own average: 25 km over 1.5 h.
    expect(summary.avgSpeedKmh, closeTo(25 / 1.5, 0.0001));
  });

  test('an empty history has zero average speed, not a division error', () {
    final summary = RideHistorySummary.compute(const []);

    expect(summary.rideCount, 0);
    expect(summary.totalDistanceM, 0);
    expect(summary.totalMovingMillis, 0);
    expect(summary.avgSpeedKmh, 0);
  });
}