import 'package:flutter_test/flutter_test.dart';

import 'package:miler/views/Dashboard/home/trip.dart';

/// Bookings shows one flat list — no trip tabs, deliberately — so the only
/// thing telling the rider which of the day's runs he is on is the label above
/// it. The number has to mean what the hub means by it, and that is the part
/// worth pinning down: the numbering is against the WHOLE day, not against the
/// subset of it the rider happened to accept.
///
/// This exercises the same `groupIntoTrips` + positional numbering the screen
/// uses, which is the piece that can silently go wrong.
void main() {
  Map<String, dynamic> stop(String id, String slotFrom, String slotTo) =>
      <String, dynamic>{
        'orderid': id,
        'pickupcustomer': 'Shop $id',
        'slotstarttime': slotFrom,
        'slotendtime': slotTo,
      };

  /// Order id → 1-based trip number, the way `_numberTrips` builds it.
  Map<String, int> numberTrips(List<Map<String, dynamic>> allToday) {
    final byId = <String, Map<String, dynamic>>{};
    for (final s in allToday) {
      final id = (s['orderid'] ?? '').toString();
      if (id.isEmpty) continue;
      byId.putIfAbsent(id, () => s);
    }
    final trips = Trip.groupIntoTrips(byId.values.toList());
    return <String, int>{
      for (var i = 0; i < trips.length; i++)
        for (final id in trips[i].orderIds) id: i + 1,
    };
  }

  final morning = [
    stop('A', '2026-08-06T09:00:00', '2026-08-06T12:00:00'),
    stop('B', '2026-08-06T09:00:00', '2026-08-06T12:00:00'),
  ];
  final afternoon = [
    stop('C', '2026-08-06T14:00:00', '2026-08-06T17:00:00'),
  ];

  test('trips are numbered by their slot, earliest first', () {
    final numbers = numberTrips([...afternoon, ...morning]);

    expect(numbers['A'], 1);
    expect(numbers['B'], 1);
    expect(numbers['C'], 2);
  });

  test('a rider who took only the afternoon is still on Trip 2', () {
    // ── The reason this is computed from the day and not from the queue ──
    //
    // Numbering only the accepted stops would call this run "Trip 1", while the
    // hub, Home and the rider's own supervisor all call it Trip 2. The label is
    // a shared name or it is worse than nothing.
    final dayNumbers = numberTrips([...morning, ...afternoon]);
    expect(dayNumbers['C'], 2);

    final queueOnly = numberTrips(afternoon);
    expect(
      queueOnly['C'],
      1,
      reason: 'this is exactly the wrong answer the screen must not give',
    );
  });

  test('a stop appearing twice in one fetch does not split its trip', () {
    // The same stop arrives from up to three sources per fetch — v1, v3 and the
    // local accepted store — and each copy carries the same slot.
    final numbers = numberTrips([...morning, ...morning, ...afternoon]);

    expect(numbers['A'], 1);
    expect(numbers['C'], 2);
  });

  test('a day with one slot is Trip 1, not "your route"', () {
    expect(numberTrips(morning)['A'], 1);
  });
}