import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';

import 'package:miler/Models/stop_status.dart';
import 'package:miler/data/accepted_store.dart';
import 'package:miler/data/api_config.dart';
import 'package:miler/data/milk_run.dart';
import 'package:miler/data/service_profile.dart';
import 'package:miler/views/Dashboard/pickups/stop_type.dart';

/// ─────────────────────────────────────────────────────────────────────────
/// THE MILK RUN, END TO END
///
/// ```
///   6 orders ─ accept ─┬─ Kitchen 1 ×5 ─ arrived ─ picked ─▶ DELIVERIES
///                      └─ Kitchen 2 ×5 ─ arrived ─ picked ─▶ DELIVERIES
///                                                              │
///                                                  arrived ─ delivered ─▶ ACTIVITY
/// ```
///
/// Three units, three different shapes, and the file exists because they were
/// being conflated:
///
///  • **Acceptance is per order** and crosses kitchens freely.
///  • **Pickup is per kitchen** — one ride, one counter, one handover — so a
///    selection must never span two of them.
///  • **Delivery is per order** again, each bag to its own door.
///
/// And the lifecycle rule underneath all of it: `picked` is the *middle* of a
/// milk-run morning. An order collected at a kitchen is a live delivery, not
/// history — it goes to DELIVERIES, and only `delivered` sends it to Activity.
/// ─────────────────────────────────────────────────────────────────────────
void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  setUp(() {
    SharedPreferences.setMockInitialValues({});
    ServiceProfile.setActive(ServiceProfile.milkMan);
  });
  tearDown(() => ServiceProfile.setActive(ServiceProfile.parcel));

  /// One assigned stop, in the shape the adapter produces.
  Map<String, dynamic> stop({
    required String id,
    required String kitchen,
    String status = 'assigned',
    String? consignmentId,
  }) => {
    'orderid': id,
    'pickupid': int.parse(id.replaceAll(RegExp(r'\D'), '')),
    'orderstatus': status,
    'sourceid': kitchen.hashCode.toString(),
    'sourcename': kitchen,
    'pickupcustomer': 'Customer $id',
    'pickuplat': 11.01,
    'pickuplon': 76.95,
    if (consignmentId != null) 'consignmentid': consignmentId,
  };

  /// Two kitchens, five orders each — the brief's own example.
  List<Map<String, dynamic>> tenOrders() => [
    for (var i = 1; i <= 5; i++) stop(id: '100$i', kitchen: 'Kitchen 1'),
    for (var i = 6; i <= 10; i++) stop(id: '10$i', kitchen: 'Kitchen 2'),
  ];

  Set<String> idsOf(Iterable<Map<String, dynamic>> stops) =>
      stops.map((s) => s['orderid'] as String).toSet();

  group('pickup is bounded by the kitchen', () {
    // ── The three units ──
    //
    // Acceptance is per order and crosses kitchens freely. Pickup does not: a
    // selection spanning two counters would post "arrived" for a shop the rider
    // is nowhere near and mark bags collected that are still in another
    // kitchen's warmer. Delivery is per order again.

    test('orders from one kitchen group together', () {
      final stops = tenOrders();
      final vidhya = MilkRun.sameSourceAs(stops.first, stops);
      expect(vidhya.length, 5);
      expect(vidhya.every((s) => s['sourcename'] == 'Kitchen 1'), isTrue);
    });

    test('and orders from another kitchen are not swept in', () {
      final stops = tenOrders();
      final vidhya = MilkRun.sameSourceAs(stops.first, stops);
      expect(
        vidhya.any((s) => s['sourcename'] == 'Kitchen 2'),
        isFalse,
        reason: 'Kitchen 2 is a different ride and a different counter',
      );
      expect(MilkRun.sameSource(stops.first, stops.last), isFalse);
    });

    test('the stable id decides, not the display name', () {
      // Two kitchens can share a name across areas; the id is what the hub
      // controls, so it is what the app compares.
      final a = {'orderid': '1', 'sourceid': 'K1', 'sourcename': 'Vidhya'};
      final b = {'orderid': '2', 'sourceid': 'K2', 'sourcename': 'Vidhya'};
      expect(MilkRun.sameSource(a, b), isFalse);
    });

    test('a name-only payload still groups', () {
      final a = {'orderid': '1', 'sourcename': 'Vidhya Kitchen'};
      final b = {'orderid': '2', 'sourcename': 'vidhya kitchen'};
      expect(MilkRun.sameSource(a, b), isTrue);
    });

    test(
      'no source at all is one honest bucket, never a fabricated kitchen',
      () {
        final a = {'orderid': '1'};
        final b = {'orderid': '2'};
        expect(MilkRun.sourceKeyOf(a), 'none');
        expect(MilkRun.sameSource(a, b), isTrue);
        expect(MilkRun.sourceNameOf(a), '');
      },
    );

    test('a zero pickuplocationid is not an id', () {
      // The adapter emits '0' for an absent location; treating it as a real
      // key would put every unsourced order in one bogus group.
      expect(MilkRun.sourceKeyOf({'pickuplocationid': '0'}), 'none');
      expect(MilkRun.sourceKeyOf({'pickuplocationid': '7'}), 'id:7');
    });

    test('collected work is NOT held back for the other kitchens', () {
      // The rule §24 turns on: three Kitchen-1 bags collected at 11:40 are
      // three live deliveries, even though Kitchen 2 has not been visited.
      final stops = tenOrders();
      final k1 = idsOf(stops.take(5));
      for (final s in stops.take(5)) {
        expect(
          k1.contains(MilkRun.idOf(s)),
          isTrue,
          reason: 'on the deliveries tab the moment it is in his hands',
        );
      }
      // And the rest are still his to collect.
      final outstanding = MilkRun.outstandingPickups(
        stops,
        acceptedIds: idsOf(stops),
        collectedIds: k1,
      );
      expect(outstanding.length, 5);
      expect(outstanding.every((s) => s['sourcename'] == 'Kitchen 2'), isTrue);
    });
  });

  group('where Navigate goes', () {
    test('to the kitchen before collection', () {
      final s = stop(id: '1001', kitchen: 'Kitchen 1');
      expect(MilkRun.navigatesToCustomer(s), isFalse);
      final target = MilkRun.navigationTarget(s);
      expect(target?.lat, 11.01);
      expect(MilkRun.navigationLabel(s), 'Kitchen 1');
    });

    test(
      'a nameless pickup is titled by its neighbourhood, never "pickup"',
      () {
        // The live backend sends no sourcename today, and the literal 'pickup'
        // this used to fall back to became the 24sp headline of the rider's
        // first group — the exact regression the project rule forbids.
        final s = {
          'orderid': '1001',
          'type': 'pickup',
          'pickupaddress': '12/4, RS Puram, Coimbatore, Tamil Nadu 641002',
        };
        expect(
          MilkRun.navigationLabel(s),
          'RS Puram',
          reason:
              'the first non-numeric address component is a place; '
              '"pickup" is a leg description',
        );

        // A component carrying its own house number is titled by the street.
        expect(
          MilkRun.navigationLabel({
            'orderid': '1002',
            'type': 'pickup',
            'pickupaddress': '124 Gandhipuram Main Road, Coimbatore 641012',
          }),
          'Gandhipuram Main Road',
        );

        // No address either → a capitalised noun, still never the raw leg word.
        expect(
          MilkRun.navigationLabel({'orderid': '1', 'type': 'pickup'}),
          'Pickup',
        );
      },
    );

    test('to the customer after collection', () {
      final s = stop(id: '1001', kitchen: 'Kitchen 1')
        ..['droplat'] = 11.05
        ..['droplon'] = 76.99;
      expect(MilkRun.navigatesToCustomer(s, collectedIds: {'1001'}), isTrue);
      final target = MilkRun.navigationTarget(s, collectedIds: {'1001'});
      expect(target?.lat, 11.05);
      expect(target?.lng, 76.99);
      expect(
        MilkRun.navigationLabel(s, collectedIds: {'1001'}),
        'Customer 1001',
      );
    });

    test('the backend status alone flips it, without the local set', () {
      final s = stop(id: '1001', kitchen: 'Kitchen 1', status: 'picked')
        ..['droplat'] = 11.05
        ..['droplon'] = 76.99;
      expect(MilkRun.navigatesToCustomer(s), isTrue);
      expect(MilkRun.navigationTarget(s)?.lat, 11.05);
    });

    test('null rather than the wrong end when coordinates are missing', () {
      // A Navigate button that quietly opens the other end of the journey is
      // worse than a disabled one: the rider only finds out on arrival.
      final s = stop(id: '1001', kitchen: 'Kitchen 1', status: 'picked');
      expect(MilkRun.navigatesToCustomer(s), isTrue);
      expect(MilkRun.navigationTarget(s), isNull);
    });

    test('logistics never navigates to a customer', () {
      ServiceProfile.setActive(ServiceProfile.parcel);
      final s = stop(id: '2001', kitchen: '', status: 'picked')
        ..['droplat'] = 11.05
        ..['droplon'] = 76.99;
      expect(
        MilkRun.navigatesToCustomer(s),
        isFalse,
        reason: 'its collected parcel goes to a hub; somebody else delivers it',
      );
      expect(MilkRun.navigationTarget(s)?.lat, 11.01);
    });
  });

  group('the ladder a stop climbs', () {
    test('accepted → arrived → picked → out for delivery → delivered', () {
      final s = stop(id: '1001', kitchen: 'Kitchen 1');

      expect(
        MilkRun.stageOf(s, acceptedIds: const {}, collectedIds: const {}),
        StopStatus.assigned,
      );
      expect(
        MilkRun.stageOf(s, acceptedIds: {'1001'}, collectedIds: const {}),
        StopStatus.accepted,
      );

      s['orderstatus'] = 'arrived';
      expect(
        MilkRun.stageOf(s, acceptedIds: {'1001'}, collectedIds: const {}),
        StopStatus.arrived,
      );

      expect(
        MilkRun.stageOf(s, acceptedIds: {'1001'}, collectedIds: {'1001'}),
        StopStatus.picked,
      );
      expect(
        MilkRun.stageOf(
          s,
          acceptedIds: {'1001'},
          collectedIds: {'1001'},
          outForDeliveryIds: {'1001'},
        ),
        StopStatus.outForDelivery,
      );
      expect(
        MilkRun.stageOf(
          s,
          acceptedIds: {'1001'},
          collectedIds: {'1001'},
          outForDeliveryIds: {'1001'},
          deliveredIds: {'1001'},
        ),
        StopStatus.delivered,
      );
    });

    test('picked up is never mistaken for delivered', () {
      // The crate is in his hands at 11:50 and the last box goes through a door
      // at 13:20. Reporting the first as the second bills the client for ninety
      // minutes of work that has not happened.
      expect(StopStatus.picked.isDelivered, isFalse);
      expect(StopStatus.picked.isTerminal, isTrue);
      expect(StopStatus.delivered.isDelivered, isTrue);
      expect(StopStatus.outForDelivery.isDeliveryLeg, isTrue);
      expect(StopStatus.picked.isDeliveryLeg, isFalse);
    });

    test(
      'the pickup arrival and the delivery arrival are different states',
      () {
        expect(stopStatusFromRaw('arrived'), StopStatus.arrived);
        expect(
          stopStatusFromRaw('delivery_arrived'),
          StopStatus.deliveryArrived,
        );
        expect(
          StopStatus.arrived,
          isNot(StopStatus.deliveryArrived),
          reason: 'one is a kitchen counter, the other a customer door',
        );
      },
    );

    test(
      'the backend spelling of out-for-delivery folds to the same state',
      () {
        for (final raw in [
          'Out_for_Delivery',
          'out for delivery',
          'outfordelivery',
        ]) {
          expect(
            stopStatusFromRaw(raw),
            StopStatus.outForDelivery,
            reason: raw,
          );
        }
      },
    );

    test('each rung offers the button that belongs to it', () {
      expect(MilkRun.nextActionLabel(StopStatus.accepted), 'Arrived');
      expect(MilkRun.nextActionLabel(StopStatus.arrived), 'Picked up');
      expect(MilkRun.nextActionLabel(StopStatus.outForDelivery), 'Arrived');
      expect(MilkRun.nextActionLabel(StopStatus.deliveryArrived), 'Delivered');
      expect(MilkRun.nextActionLabel(StopStatus.delivered), isNull);
    });
  });

  group('a collected order is on DELIVERIES, never Activity', () {
    // ── The bug this group exists for ──
    //
    // `picked` at a kitchen was being filed as completed work, so the order
    // left the deliveries list and appeared in the rider's history before he
    // had left the counter. Activity's filter and the deliveries list read the
    // same test from opposite sides, so it broke both at once.

    test('picked is not finished work on a milk run', () {
      ServiceProfile.setActive(ServiceProfile.milkMan);
      expect(StopStatus.picked.isWorkComplete, isFalse);
      expect(StopStatus.delivered.isWorkComplete, isTrue);
      expect(StopStatus.cancelled.isWorkComplete, isTrue);
    });

    test('picked IS finished work on logistics', () {
      ServiceProfile.setActive(ServiceProfile.parcel);
      expect(
        StopStatus.picked.isWorkComplete,
        isTrue,
        reason: 'collecting the parcel is the job; the hub takes it from there',
      );
    });

    test('a picked milk-run stop is still live work', () {
      ServiceProfile.setActive(ServiceProfile.milkMan);
      final s = stop(id: '1001', kitchen: 'Kitchen 1', status: 'picked');
      expect(stopStatusOf(s).isWorkComplete, isFalse);
      expect(stopStatusOf(s).isPicked, isTrue);
    });
  });

  group('the round, on the device', () {
    test('releasing marks the load and finishing clears it', () async {
      expect(await getOutForDeliveryOrderIds(), isEmpty);

      await addOutForDeliveryOrderIds(['1001', '1002', '1003']);
      expect(await getOutForDeliveryOrderIds(), {'1001', '1002', '1003'});

      await removeOutForDeliveryOrderIds(['1002']);
      expect(await getOutForDeliveryOrderIds(), {'1001', '1003'});
    });

    test('a finished day leaves nothing behind for tomorrow', () async {
      await addCollectedOrderIds(['1001']);
      await addOutForDeliveryOrderIds(['1001']);
      await addNotLoadedOrderIds(['1002']);

      await clearServiceRunState();

      expect(await getCollectedOrderIds(), isEmpty);
      expect(await getOutForDeliveryOrderIds(), isEmpty);
      expect(await getNotLoadedOrderIds(), isEmpty);
    });

    test('a milk-run stop is filed as delivered, not picked', () async {
      await addCompletedBookings([
        {'orderid': '1001', 'pickupcustomer': 'A'},
      ]);
      final done = await getCompletedBookings();
      expect(done.single['orderstatus'], 'delivered');
      expect(stopStatusOf(done.single), StopStatus.delivered);
    });

    test('a logistics stop is filed as picked', () async {
      ServiceProfile.setActive(ServiceProfile.parcel);
      await addCompletedBookings([
        {'orderid': '2001', 'pickupcustomer': 'B'},
      ]);
      final done = await getCompletedBookings();
      expect(done.single['orderstatus'], 'picked');
    });
  });

  group('the consignment id survives the trip from the API', () {
    test('the adapter carries source, pincodes and consignment through', () {
      final stop = ApiConfig.pickupFromBooking({
        'bookingid': 42,
        'bookingreference': 'DM-42',
        'status': 'Converted_To_Consignment',
        'pickupaddress': 'Kitchen 1, RS Puram',
        'pickuppincode': '641002',
        'deliveryaddress': '12 Cross Cut Road',
        'deliverypincode': '641012',
        'sourceid': '7',
        'sourcename': 'Kitchen 1',
        'consignmentid': 900,
      });

      // These four were the ones being dropped: without them every milk-run
      // stop grouped into one nameless pile and no drop could be closed.
      expect(stop['sourceid'], '7');
      expect(stop['sourcename'], 'Kitchen 1');
      expect(stop['consignmentid'], '900');
      expect(stop['pickuppincode'], '641002');
      expect(stop['droppincode'], '641012');
    });

    test('a booking with no source groups as no source, not as a guess', () {
      final stop = ApiConfig.pickupFromBooking({
        'bookingid': 43,
        'bookingreference': 'DM-43',
        'pickupaddress': '9 Mettupalayam Road',
      });
      expect(stop['sourcename'], '');
      expect(stop['sourceid'], '');
      expect(stop['consignmentid'], '');
    });

    test('MilkRun reads the consignment the adapter wrote', () {
      expect(MilkRun.consignmentIdOf({'consignmentid': '900'}), '900');
      expect(MilkRun.consignmentIdOf({}), '');
    });
  });

  // ── The label follows the leg, not the payload ──
  //
  // `ApiConfig.pickupFromBooking` stamps `type: pickup` on every row it builds,
  // because a v1 booking *is* a first-mile pickup and the backend has no
  // per-stop type to send. On a milk run that made a bag already in the rider's
  // box describe itself as a pickup: the delivery card offered **Start Pickup**,
  // the confirmation sheet asked him to **Confirm pickup**, and the write path
  // behind that button took the pickup branch — he was being asked to collect
  // something he was carrying.
  // ── Which screen a rung is worked on ──
  //
  // The defect: after accepting on Home, the Deliveries tab offered a live
  // strip for the stop. Tapping it opened the single-stop map, then I'VE
  // ARRIVED, then a confirmation sheet — a second, contradictory route up a
  // ladder whose rungs are supposed to be one bulk slide on Home, at the
  // counter, for the whole stack of bags at once. It also posted the booking
  // ACTIVE from the tab that is meant to be the rider's load.
  group('worksOnOwnScreen', () {
    Map<String, dynamic> booking(String status) => {
      'orderid': 'B1',
      'type': 'pickup',
      'orderstatus': status,
      'kitchenname': 'Vidhya Kitchen',
    };

    test('a kitchen collection is worked on Home, not on its own screen', () {
      ServiceProfile.setActive(ServiceProfile.milkMan);
      for (final status in ['assigned', 'accepted', 'arrived']) {
        expect(
          MilkRun.worksOnOwnScreen(booking(status)),
          isFalse,
          reason: '$status is a rung of the bulk ladder on Home',
        );
      }
    });

    test('the delivery leg is worked on its own screen', () {
      ServiceProfile.setActive(ServiceProfile.milkMan);
      // Both ways a bag is known to be in his hands.
      expect(MilkRun.worksOnOwnScreen(booking('picked')), isTrue);
      expect(
        MilkRun.worksOnOwnScreen(booking('accepted'), collectedIds: {'B1'}),
        isTrue,
      );
    });

    test('every logistics stop is worked on its own screen', () {
      // Nothing is batched on that line: one customer, one parcel, one
      // shipment raised at the door. The rule must not leak across.
      ServiceProfile.setActive(ServiceProfile.parcel);
      for (final status in ['assigned', 'accepted', 'arrived', 'picked']) {
        expect(
          MilkRun.worksOnOwnScreen(booking(status)),
          isTrue,
          reason: status,
        );
      }
    });
  });

  group('workingKind', () {
    Map<String, dynamic> booking(String status) => {
      'orderid': 'B1',
      'pickupcustomer': 'Joe',
      // Exactly what the adapter writes.
      'type': 'pickup',
      'orderstatus': status,
      'kitchenname': 'Vidhya Kitchen',
    };

    test(
      'a collected milk-run order is a delivery, whatever the payload says',
      () {
        ServiceProfile.setActive(ServiceProfile.meals);
        final stop = booking('picked');

        expect(
          stopKindOf(stop),
          StopKind.pickup,
          reason: 'what the payload says',
        );
        expect(
          MilkRun.workingKind(stop),
          StopKind.delivery,
          reason: 'what the rider is actually doing',
        );
        expect(MilkRun.workingKind(stop).startCtaLabel, 'Start Delivery');
        expect(MilkRun.workingKind(stop).completeLabel, 'Delivered');
      },
    );

    test('the collected set is what the delivery screen actually has', () {
      // ── The status is not the record on that screen ──
      //
      // A stop on the work tab comes out of the *accepted* store, which
      // normalises every row it holds to `accepted`. What records the hand-over
      // is the collected set — so asking the leg without it reads a bag already
      // in the rider's box as still needing collection, which is exactly how
      // the delivery card came to offer **Start Pickup**.
      ServiceProfile.setActive(ServiceProfile.meals);
      final onTheTab = booking('accepted');

      expect(MilkRun.workingKind(onTheTab), StopKind.pickup);
      expect(
        MilkRun.workingKind(onTheTab, collectedIds: {'B1'}).startCtaLabel,
        'Start Delivery',
      );
      expect(
        MilkRun.workingKind(onTheTab, collectedIds: {'B1'}).completeLabel,
        'Delivered',
      );
    });

    test('the local collected set counts, before any status lands', () {
      ServiceProfile.setActive(ServiceProfile.meals);
      final stop = booking('accepted');

      // Straight after the pickup slide the server may still say `accepted`;
      // the rider is holding the bag either way.
      expect(MilkRun.workingKind(stop), StopKind.pickup);
      expect(
        MilkRun.workingKind(stop, collectedIds: {'B1'}),
        StopKind.delivery,
      );
    });

    test('before collection it is still a pickup', () {
      ServiceProfile.setActive(ServiceProfile.meals);
      expect(MilkRun.workingKind(booking('accepted')), StopKind.pickup);
    });

    test('a parcel booking is untouched', () {
      ServiceProfile.setActive(ServiceProfile.parcel);
      // A collected parcel goes to a hub and is delivered by somebody else, so
      // the rider never drives to its customer and the word never changes.
      expect(MilkRun.workingKind(booking('picked')), StopKind.pickup);
      expect(
        MilkRun.workingKind(booking('picked')).startCtaLabel,
        'Start Pickup',
      );
    });
  });
}