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/service_profile.dart';
import 'package:miler/data/milk_run.dart';
import 'package:miler/data/work_domain.dart';
import 'package:miler/views/Dashboard/pickups/stop_type.dart';

/// ─────────────────────────────────────────────────────────────────────────
/// ONE ORDER, ONE SCREEN
///
/// ```
///   ASSIGNED ─ accept ─▶ ACCEPTED ─ go ─▶ ARRIVED ─ pick up ─▶ PICKED
///   └────────────────── HOME owns all of this ──────────────┘     │
///                                                  pickup-complete │
///                                                                  ▼
///                                       DELIVERIES owns from here on
/// ```
///
/// [WorkBoundary] is the single function that decides which side a row is on.
/// Deliveries asked it; **Home never did** — it assigned the raw fetch to its
/// route list and let each card work itself out. So on a kitchen line, where
/// `isWorkComplete` is `delivered || cancelled`, a *picked* stop stayed in
/// Home's route while simultaneously sitting in Deliveries' queue: one bag, two
/// screens, two different next actions.
///
/// These hold the guarantee itself rather than either screen's filter — the
/// two lists are provably disjoint and provably exhaustive, so no future filter
/// can drift back apart from the other.
/// ─────────────────────────────────────────────────────────────────────────
void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

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

  Map<String, dynamic> stop(String id, String status) => {
    'orderid': id,
    'pickupid': int.parse(id),
    'sourcename': 'Vidhya Kitchen',
    'orderstatus': status,
  };

  /// The whole day, in every state a row can reach.
  List<Map<String, dynamic>> day() => [
    stop('1001', 'assigned'),
    stop('1002', 'accepted'),
    stop('1003', 'arrived'),
    stop('1004', 'picked'),
    stop('1005', 'outfordelivery'),
    stop('1006', 'delivered'),
    stop('1007', 'cancelled'),
    stop('1008', 'skipped'),
  ];

  group('the two lists never overlap', () {
    for (final profile in [ServiceProfile.milkMan, ServiceProfile.parcel]) {
      test('on ${profile.line.name}', () {
        ServiceProfile.setActive(profile);
        const accepted = {'1002', '1003'};
        const collected = {'1004'};

        final home = WorkBoundary.pickupQueue(
          day(),
          acceptedIds: accepted,
          collectedIds: collected,
        ).map((s) => s['orderid']).toSet();
        final deliveries = WorkBoundary.deliveryQueue(
          day(),
          acceptedIds: accepted,
          collectedIds: collected,
        ).map((s) => s['orderid']).toSet();

        expect(
          home.intersection(deliveries),
          isEmpty,
          reason: 'an order on both screens is one bag with two next actions',
        );
      });
    }
  });

  group('the boundary is pickup-complete, never acceptance', () {
    setUp(() => ServiceProfile.setActive(ServiceProfile.milkMan));

    test('an accepted booking is Home\'s, not delivery work', () {
      // The one rule the delivery screens hang off: accepting is a decision
      // about work still to be done, not evidence anything was collected.
      // Reading it as a hand-over opened a map, an I'VE ARRIVED and a
      // confirmation sheet for a pickup the rider had not made.
      expect(
        WorkBoundary.domainOf(stop('1002', 'accepted'), acceptedIds: {'1002'}),
        WorkDomain.pickup,
      );
    });

    test('an arrived booking is still Home\'s', () {
      expect(
        WorkBoundary.domainOf(stop('1003', 'arrived'), acceptedIds: {'1003'}),
        WorkDomain.pickup,
      );
    });

    test('the collected record moves it, and only after the call landed', () {
      // `addCollectedOrderIds` is written by Home *after* pickup-complete comes
      // back successful — never optimistically.
      expect(
        WorkBoundary.domainOf(stop('1004', 'accepted')),
        WorkDomain.pickup,
      );
      expect(
        WorkBoundary.domainOf(stop('1004', 'accepted'), collectedIds: {'1004'}),
        WorkDomain.delivery,
      );
    });

    test('the backend status moves it on its own', () {
      for (final s in ['picked', 'outfordelivery']) {
        expect(
          WorkBoundary.domainOf(stop('1004', s)),
          WorkDomain.delivery,
          reason: '$s is past the counter',
        );
      }
    });
  });

  group('closed work belongs to neither', () {
    test('a delivered milk-run stop leaves both screens', () {
      ServiceProfile.setActive(ServiceProfile.milkMan);
      expect(
        WorkBoundary.domainOf(stop('1006', 'delivered')),
        WorkDomain.closed,
      );
    });

    test('a picked parcel booking is closed; a picked milk run is not', () {
      // Collecting IS the job on logistics — the hub delivers it. On a round it
      // is the middle of the morning.
      ServiceProfile.setActive(ServiceProfile.parcel);
      expect(WorkBoundary.domainOf(stop('1004', 'picked')), WorkDomain.closed);

      ServiceProfile.setActive(ServiceProfile.milkMan);
      expect(
        WorkBoundary.domainOf(stop('1004', 'picked')),
        WorkDomain.delivery,
      );
    });
  });

  _sourceNameContract();

  group('the consignment id survives the pivot', () {
    test('it is filed under the order id the door reads', () async {
      // `updatePickedStatus` sent no `orderid`, so the mapper filed the
      // consignment under the *booking* id while `closeDelivery` looked it up
      // by **order** id. Every collected stop was stored under a key nothing
      // would ask for, and pressing Delivered answered "this order was never
      // picked up on the system" for a bag in the rider's hands.
      await rememberConsignmentId('DM-BK-16DA518D-6381', '55123');
      final ids = await getConsignmentIds();
      expect(ids['DM-BK-16DA518D-6381'], '55123');
    });

    test('an empty id is never stored, so nothing can be fabricated', () async {
      await rememberConsignmentId('DM-1', '');
      await rememberConsignmentId('', '55124');
      expect(await getConsignmentIds(), isEmpty);
    });
  });
}

/// ─────────────────────────────────────────────────────────────────────────
/// ONE READER FOR A PLACE'S NAME
///
/// `MilkRun.sourceNameOf` read `sourcename` / `kitchenname`; `stopSourceName`
/// read those *and* the CamelCase `SourceName` / `KitchenName` the payload
/// sometimes carries. A booking with only the capitalised key had a counter
/// according to one and none according to the other — and the route card used
/// both in one expression, so the group was not flat (there is a counter) but
/// was titled "pickup" (there is no counter to name).
///
/// On a device that is a foldable place headed by a leg description, holding
/// one order named after the same stop — exactly the shape the `flat` flag
/// exists to prevent.
void _sourceNameContract() {
  group('a place has one name', () {
    for (final key in const [
      'sourcename',
      'SourceName',
      'kitchenname',
      'KitchenName',
    ]) {
      test('$key is read by both readers', () {
        final stop = <String, dynamic>{'orderid': '1', key: 'Vidhya Kitchen'};
        expect(MilkRun.sourceNameOf(stop), 'Vidhya Kitchen');
        expect(stopSourceName(stop), 'Vidhya Kitchen');
        expect(stopSourceName(stop), MilkRun.sourceNameOf(stop));
      });
    }

    test('no key means no counter, from both', () {
      const stop = <String, dynamic>{'orderid': '1'};
      expect(MilkRun.sourceNameOf(stop), isEmpty);
      expect(stopSourceName(stop), isEmpty);
    });
  });
}