import 'package:dio/dio.dart';
import 'package:fintracker_app/core/api/api_client.dart';
import 'package:flutter_test/flutter_test.dart';

/// Captures whatever `onRequest` passes on, so the rewritten query can be inspected.
class _Capture extends RequestInterceptorHandler {
  RequestOptions? seen;

  @override
  void next(RequestOptions options) => seen = options;
}

void main() {
  RequestOptions run(Map<String, dynamic> query) {
    final handler = _Capture();
    DateQueryInterceptor().onRequest(
      RequestOptions(path: '/networth/series', queryParameters: query),
      handler,
    );
    return handler.seen!;
  }

  test('a DateTime becomes a plain YYYY-MM-DD date', () {
    // the value the generated client hands over: DateTime.now(), time and all
    final out = run({'from': DateTime(2025, 9, 18, 10, 31, 29, 84)});
    expect(out.queryParameters['from'], '2025-09-18');
  });

  test('single-digit months and days keep two digits', () {
    final out = run({'from': DateTime(2026, 1, 5)});
    expect(out.queryParameters['from'], '2026-01-05');
  });

  test('non-date parameters are passed through untouched', () {
    final out = run({'page': 2, 'q': 'кофе', 'include_deleted': false});
    expect(out.queryParameters, {
      'page': 2,
      'q': 'кофе',
      'include_deleted': false,
    });
  });
}