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

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

/// One app, two lines of work. The tests that matter here are about the
/// direction the resolver fails in: an unconfigured or unrecognised tenant must
/// land on the parcel line, because that is the larger business and the failure
/// it cannot afford is a rider losing the screen that collects a customer's
/// cash. Showing a meal rider a payment prompt he can dismiss is the cheap
/// mistake.
void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  /// Resolves through the free function, not the GetX controller — see the
  /// note on [ServiceProfile.active] for why data code must not need a
  /// container. [ServiceProfile.setActive] is what `TenantController.load`
  /// would have done.
  Future<ServiceProfile> resolveWith(Map<String, Object> prefs) async {
    SharedPreferences.setMockInitialValues(prefs);
    final profile = await resolveServiceProfile();
    ServiceProfile.setActive(profile);
    return profile;
  }

  tearDown(() => ServiceProfile.setActive(ServiceProfile.parcel));

  group('tenant resolution', () {
    test(
      'an unknown tenant falls back to parcel, not to the meal flow',
      () async {
        final p = await resolveWith({'tenantid': 4242});
        expect(p.line, ServiceLine.parcel);
        expect(p.collectsCash, isTrue);
        expect(p.needsVerification, isTrue);
      },
    );

    test('a login with no tenant at all still gets a working app', () async {
      final p = await resolveWith({});
      expect(p.line, ServiceLine.parcel);
    });

    test('the tenant name selects meals, case and spacing aside', () async {
      final p = await resolveWith({
        'tenantid': 0,
        'tenantname': '  DailyGrubs ',
      });
      expect(p.line, ServiceLine.milkMan);
    });

    test(
      'a meal rider is not asked for money, proof or a verification form',
      () async {
        final p = await resolveWith({'tenantname': 'meals'});
        expect(p.collectsCash, isFalse);
        expect(p.needsVerification, isFalse);
        expect(p.needsProofPhoto, isFalse);
        // He cannot decline one subscriber's lunch.
        expect(p.acceptsPerStop, isFalse);
        expect(p.sourceIsKitchen, isTrue);
      },
    );

    test(
      'an unrecognised name falls through to the id rather than deciding',
      () async {
        // A client the app has never been told about must not guess its way onto
        // the meal flow.
        final p = await resolveWith({
          'tenantname': 'someclient',
          'tenantid': 1,
        });
        expect(p.line, ServiceLine.parcel);
      },
    );
  });

  group('the money gate', () {
    final stop = <String, dynamic>{'collectionamt': 450};

    test(
      'a parcel route still collects what the stop says it collects',
      () async {
        await resolveWith({'tenantid': 1});
        expect(stopCollectionAmount(stop), 450);
      },
    );

    test('a meal tenant collects nothing, whatever the payload says', () async {
      await resolveWith({'tenantname': 'meals'});
      // The one gate every "is anything owed?" branch in the app reads.
      expect(stopCollectionAmount(stop), 0);
      expect(stopCollectionAmount({'codamount': '₹1,200'}), 0);
    });

    test('the alternate spellings still work on a parcel route', () async {
      await resolveWith({'tenantid': 1});
      expect(stopCollectionAmount({'pickupamt': '₹1,200'}), 1200);
      expect(stopCollectionAmount({'codamount': 75.5}), 75.5);
    });
  });

  group('the tenant id sent at login', () {
    test('an ordinary build declares none, and the field is omitted', () {
      // `--dart-define=TENANT_ID` is unset here, as it is in every default
      // build. `hasTenantId` is what gates the field onto the request body, so
      // a plain APK asks the server to decide rather than asserting a tenant.
      expect(MilerApi.tenantId, 0);
      expect(MilerApi.hasTenantId, isFalse);
    });

    test('zero is never a tenant', () {
      // Sending `tenantid: 0` would look like a real lookup key to the server.
      // The only way to say "you decide" is to leave the field out, so the
      // guard is > 0 rather than a null check.
      expect(MilerApi.hasTenantId, MilerApi.tenantId > 0);
    });
  });
}