import 'package:flutter_test/flutter_test.dart';
import 'package:miaoji_zhang/shared/services/local_database.dart';

void main() {
  test('本地转账按方向统计并按稳定身份幂等', () {
    final database = LocalDatabase.inMemoryForTesting();
    addTearDown(database.close);
    database.upsertBudget(2026, 7, 1, null, 100, false);
    database.upsertBudget(2026, 7, 1, 1, 80, false);

    final transferOut = <String, dynamic>{
      'ledgerId': 1,
      'categoryId': 1,
      'type': 'transfer',
      'transferDirection': 'out',
      'counterparty': '张三',
      'amount': 40,
      'occurredAt': '2026-07-25T03:00:00.000Z',
      'source': 'accessibility',
      'clientRequestId': 'wx-event-out-a',
      'provider': 'wechat',
      'providerTransactionId': 'wx-order-out-001',
      'recognitionOccurrenceId': 'wx-occurrence-out-a',
    };
    final createdOut = database.createTransaction(transferOut);
    final providerRetry = database.createTransaction({
      ...transferOut,
      'clientRequestId': 'wx-event-out-b',
      'recognitionOccurrenceId': 'wx-occurrence-out-b',
    });
    expect(providerRetry['id'], createdOut['id']);

    final transferIn = <String, dynamic>{
      'ledgerId': 1,
      'categoryId': 101,
      'type': 'transfer',
      'transferDirection': 'in',
      'counterparty': '张三',
      'amount': 75,
      'occurredAt': '2026-07-25T03:05:00.000Z',
      'source': 'accessibility',
      'clientRequestId': 'wx-event-in-a',
      'recognitionOccurrenceId': 'wx-occurrence-in-001',
    };
    final createdIn = database.createTransaction(transferIn);
    final occurrenceRetry = database.createTransaction({
      ...transferIn,
      'clientRequestId': 'wx-event-in-b',
    });
    expect(occurrenceRetry['id'], createdIn['id']);

    final month = database.monthSummary(2026, 7, 1);
    expect(month['count'], 2);
    expect(month['expense'], 40);
    expect(month['income'], 75);
    expect(month['balance'], 35);

    final stats = database.periodStats('month', DateTime(2026, 7, 25), 1);
    expect(stats['totalExpense'], 40);
    expect(stats['totalIncome'], 75);

    final budgets = database.budgets(2026, 7, 1);
    expect((budgets['total'] as Map<String, dynamic>)['spent'], 40);
    expect(
      ((budgets['categories'] as List).single as Map<String, dynamic>)['spent'],
      40,
    );
  });

  test('本地数据库拒绝缺少方向的转账', () {
    final database = LocalDatabase.inMemoryForTesting();
    addTearDown(database.close);

    expect(
      () => database.createTransaction({
        'ledgerId': 1,
        'categoryId': 1,
        'type': 'transfer',
        'amount': 20,
        'occurredAt': '2026-07-25T03:00:00.000Z',
      }),
      throwsStateError,
    );
  });

  test('云端回写失败时保留待同步的本地账单', () {
    final database = LocalDatabase.inMemoryForTesting();
    addTearDown(database.close);
    final local = database.createTransaction({
      'ledgerId': 1,
      'categoryId': 1,
      'type': 'expense',
      'amount': 28,
      'occurredAt': '2026-07-25T03:00:00.000Z',
      'source': 'manual',
    });
    final localId = local['id'] as int;

    expect(
      () => database.replaceLocalTransaction(localId, {
        ...local,
        'id': 42,
        'occurredAt': 'invalid-time',
      }),
      throwsFormatException,
    );
    expect(database.transaction(localId), isNotNull);
    expect(database.transaction(42), isNull);
  });
}