import 'package:commons_core/commons_core.dart';
import 'package:drift/drift.dart' hide isNull;
import 'package:flutter_test/flutter_test.dart';
import 'package:tane/data/variety_repository.dart';
import 'package:tane/db/database.dart';
import 'package:tane/db/enums.dart';

import '../support/test_support.dart';

void main() {
  late AppDatabase db;
  late VarietyRepository repo;
  late String varietyId;
  setUp(() async {
    db = newTestDatabase();
    repo = newTestRepository(db);
    varietyId = await repo.addQuickVariety(label: 'Tomate rosa');
  });
  tearDown(() => db.close());

  Future<Movement> movementById(String id) =>
      (db.select(db.movements)..where((m) => m.id.equals(id))).getSingle();

  Future<Lot> lotById(String id) =>
      (db.select(db.lots)..where((l) => l.id.equals(id))).getSingle();

  test('a plain gift records just the given movement', () async {
    final lotId = await repo.addLot(varietyId: varietyId);

    final result = await repo.recordHandover(
      lotId: lotId,
      direction: HandoverDirection.iGave,
      counterparty: 'María',
    );

    expect(result.saleId, isNull);
    expect(result.plantareId, isNull);
    final movement = await movementById(result.movementId);
    expect(movement.type, MovementType.given);
    expect(movement.lotId, lotId);
    expect(movement.notes, 'María');
    expect(movement.plantareId, isNull);
    expect(await repo.watchSales().first, isEmpty);
    expect(await repo.watchPlantares().first, isEmpty);
  });

  test(
    'giving all depletes the lot, privatizes it and drops its price',
    () async {
      final lotId = await repo.addLot(
        varietyId: varietyId,
        quantity: const Quantity(kind: QuantityKind.grams, count: 40),
        abundance: Abundance.plentyToShare,
        offerStatus: OfferStatus.sell,
        priceAmount: 3,
        priceCurrency: '€',
      );

      final result = await repo.recordHandover(
        lotId: lotId,
        direction: HandoverDirection.iGave,
        gaveAll: true,
      );

      // The movement carries what actually moved: the lot's whole quantity.
      final movement = await movementById(result.movementId);
      expect(movement.quantityKind, QuantityKind.grams.name);
      expect(movement.quantityPrecise, 40);

      // The lot stays as an empty jar, withdrawn from the market.
      final lot = await lotById(lotId);
      expect(lot.quantityPrecise, 0);
      expect(lot.quantityKind, QuantityKind.grams.name);
      expect(lot.abundance, isNull);
      expect(lot.offerStatus, OfferStatus.private);
      expect(lot.priceAmount, isNull);
      expect(lot.priceCurrency, isNull);
      expect(
        (await repo.shareableLots()).where((l) => l.lotId == lotId),
        isEmpty,
      );
    },
  );

  test('giving part keeps the lot open and offered', () async {
    final lotId = await repo.addLot(
      varietyId: varietyId,
      quantity: const Quantity(kind: QuantityKind.grams, count: 40),
      offerStatus: OfferStatus.shared,
    );

    final result = await repo.recordHandover(
      lotId: lotId,
      direction: HandoverDirection.iGave,
      quantity: const Quantity(kind: QuantityKind.grams, count: 10),
    );

    final movement = await movementById(result.movementId);
    expect(movement.quantityPrecise, 10);
    final lot = await lotById(lotId);
    expect(lot.quantityPrecise, 40); // untouched: the log holds the history
    expect(lot.offerStatus, OfferStatus.shared);
    expect(
      (await repo.shareableLots()).where((l) => l.lotId == lotId),
      hasLength(1),
    );
  });

  test('a payment on a give creates the matching sale record', () async {
    final lotId = await repo.addLot(varietyId: varietyId);

    final result = await repo.recordHandover(
      lotId: lotId,
      direction: HandoverDirection.iGave,
      counterparty: 'María',
      withPayment: true,
      paymentAmount: 2.5,
      paymentCurrency: 'Ğ1',
    );

    final sales = await repo.watchSales().first;
    expect(sales, hasLength(1));
    expect(sales.single.id, result.saleId);
    expect(sales.single.direction, SaleDirection.iSold);
    expect(sales.single.varietyId, varietyId);
    expect(sales.single.counterparty, 'María');
    expect(sales.single.amount, 2.5);
    expect(sales.single.currency, 'Ğ1');
  });

  test('a promise on a give creates a plantare owed to me, linked from the '
      'movement', () async {
    final lotId = await repo.addLot(varietyId: varietyId);

    final result = await repo.recordHandover(
      lotId: lotId,
      direction: HandoverDirection.iGave,
      counterparty: 'María',
      withPromise: true,
      promiseOwedDescription: 'un puñado la próxima temporada',
    );

    final plantares = await repo.watchPlantares().first;
    expect(plantares, hasLength(1));
    expect(plantares.single.id, result.plantareId);
    expect(plantares.single.direction, PlantareDirection.owedToMe);
    expect(plantares.single.varietyId, varietyId);
    expect(plantares.single.counterparty, 'María');
    expect(plantares.single.owedDescription, 'un puñado la próxima temporada');
    // The link the model reserved: the movement carries the plantare id.
    final movement = await movementById(result.movementId);
    expect(movement.plantareId, result.plantareId);
  });

  test('receiving with payment and promise mirrors the directions', () async {
    final lotId = await repo.addLot(
      varietyId: varietyId,
      quantity: const Quantity(kind: QuantityKind.grams, count: 40),
    );

    final result = await repo.recordHandover(
      lotId: lotId,
      direction: HandoverDirection.iReceived,
      // Meaningless on a receive; must not deplete anything.
      gaveAll: true,
      withPayment: true,
      paymentAmount: 5,
      paymentCurrency: '€',
      withPromise: true,
    );

    final movement = await movementById(result.movementId);
    expect(movement.type, MovementType.received);
    final lot = await lotById(lotId);
    expect(lot.quantityPrecise, 40);
    final sales = await repo.watchSales().first;
    expect(sales.single.direction, SaleDirection.iBought);
    final plantares = await repo.watchPlantares().first;
    expect(plantares.single.direction, PlantareDirection.iReturn);
  });
}