fin-tracker/app/lib/features/tax/providers.dart

import 'package:flutter_riverpod/flutter_riverpod.dart';

import '../../core/api/api_client.dart';
import '../../core/cache/cached.dart';
import 'data/tax_api.dart';

final taxApiProvider = Provider<TaxApi>(
  (ref) => TaxApi(ref.watch(apiProvider).dio),
);

final taxYearProvider = StateProvider<int>((ref) => DateTime.now().year);

/// Optional account filter; null = all accounts.
final taxAccountProvider = StateProvider<int?>((ref) => null);

/// See `docs/ai/offline-cache.md`.
final taxSummaryProvider = FutureProvider.autoDispose<Cached<TaxSummary>>((
  ref,
) async {
  return ref
      .watch(taxApiProvider)
      .summary(
        year: ref.watch(taxYearProvider),
        accountId: ref.watch(taxAccountProvider),
      );
});

final taxLotsProvider = FutureProvider.autoDispose<Cached<List<TaxLot>>>((
  ref,
) async {
  return ref
      .watch(taxApiProvider)
      .lots(
        year: ref.watch(taxYearProvider),
        accountId: ref.watch(taxAccountProvider),
      );
});

void invalidateTaxProviders(WidgetRef ref) {
  ref.invalidate(taxSummaryProvider);
  ref.invalidate(taxLotsProvider);
}