import 'package:dio/dio.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:http_mock_adapter/http_mock_adapter.dart';
import 'package:jiu_client/core/api/api_client.dart';
import 'package:jiu_client/core/exceptions.dart';
import 'package:jiu_client/repositories/warehouse_repository.dart';

const _baseUrl = 'http://localhost:8080/api/v1';

class _TestApiClient extends ApiClient {
  final Dio _testDio;
  _TestApiClient(this._testDio) : super(token: 'test-token');

  @override
  Future<Response> get(String path, {Map<String, dynamic>? params}) =>
      _testDio.get(path, queryParameters: params);

  @override
  Future<Response> post(String path, {dynamic data}) =>
      _testDio.post(path, data: data);

  @override
  Future<Response> put(String path, {dynamic data}) =>
      _testDio.put(path, data: data);

  @override
  Future<Response> delete(String path) => _testDio.delete(path);
}

void main() {
  late Dio dio;
  late DioAdapter adapter;
  late WarehouseRepository repo;

  setUp(() {
    dio = Dio(BaseOptions(baseUrl: _baseUrl));
    adapter = DioAdapter(dio: dio, matcher: const FullHttpRequestMatcher());
    repo = WarehouseRepository(_TestApiClient(dio));
  });

  // ---------------------------------------------------------------------------
  // list()
  // ---------------------------------------------------------------------------
  group('WarehouseRepository.list()', () {
    test('returns list of warehouses on 200', () async {
      adapter.onGet(
        '/warehouses',
        (server) => server.reply(200, {
          'data': [
            {'id': 1, 'name': '主仓库', 'location': '一楼', 'is_default': true},
            {'id': 2, 'name': '冷藏仓', 'location': '地下室', 'is_default': false},
          ]
        }),
      );

      final list = await repo.list();

      expect(list.length, 2);
      expect(list.first.name, '主仓库');
      expect(list.first.isDefault, true);
      expect(list[1].name, '冷藏仓');
      expect(list[1].isDefault, false);
    });

    test('returns empty list without error when data is empty', () async {
      adapter.onGet(
        '/warehouses',
        (server) => server.reply(200, {'data': []}),
      );

      final list = await repo.list();
      expect(list, isEmpty);
    });

    test('401 response throws AppException with status 401', () async {
      adapter.onGet(
        '/warehouses',
        (server) => server.reply(401, {'error': 'unauthorized'}),
      );

      expect(
        () => repo.list(),
        throwsA(
          predicate<AppException>((e) => e.statusCode == 401),
        ),
      );
    });

    test('400 response throws AppException with server error message', () async {
      adapter.onGet(
        '/warehouses',
        (server) => server.reply(400, {'error': 'bad request'}),
      );

      expect(
        () => repo.list(),
        throwsA(
          predicate<AppException>(
            (e) => e.message == 'bad request' && e.statusCode == 400,
          ),
        ),
      );
    });

    test('network error throws AppException with fallback message', () async {
      final badDio = Dio(BaseOptions(
        baseUrl: 'http://localhost:19999',
        connectTimeout: const Duration(milliseconds: 100),
      ));
      final badRepo = WarehouseRepository(_TestApiClient(badDio));

      try {
        await badRepo.list();
        fail('Expected AppException');
      } on AppException catch (e) {
        expect(e.message, isNotEmpty);
      }
    });
  });

  // ---------------------------------------------------------------------------
  // create()
  // ---------------------------------------------------------------------------
  group('WarehouseRepository.create()', () {
    test('returns created Warehouse on 201', () async {
      final payload = {'name': '新仓库', 'location': '二楼', 'is_default': false};
      adapter.onPost(
        '/warehouses',
        (server) => server.reply(201, {
          'data': {
            'id': 3,
            'name': '新仓库',
            'location': '二楼',
            'is_default': false,
          }
        }),
        data: payload,
      );

      final warehouse = await repo.create(payload);

      expect(warehouse.id, 3);
      expect(warehouse.name, '新仓库');
      expect(warehouse.isDefault, false);
    });

    test('400 response throws AppException', () async {
      adapter.onPost(
        '/warehouses',
        (server) => server.reply(400, {'error': 'name is required'}),
        data: {'name': '', 'is_default': false},
      );

      expect(
        () => repo.create({'name': '', 'is_default': false}),
        throwsA(isA<AppException>()),
      );
    });
  });

  // ---------------------------------------------------------------------------
  // update()
  // ---------------------------------------------------------------------------
  group('WarehouseRepository.update()', () {
    test('returns updated Warehouse on 200', () async {
      final payload = {'name': '主仓库(改)', 'is_default': true};
      adapter.onPut(
        '/warehouses/1',
        (server) => server.reply(200, {
          'data': {
            'id': 1,
            'name': '主仓库(改)',
            'location': '一楼',
            'is_default': true,
          }
        }),
        data: payload,
      );

      final warehouse = await repo.update(1, payload);

      expect(warehouse.id, 1);
      expect(warehouse.name, '主仓库(改)');
    });

    test('404 throws AppException', () async {
      adapter.onPut(
        '/warehouses/999',
        (server) => server.reply(404, {'error': 'not found'}),
        data: {'name': 'X'},
      );

      expect(
        () => repo.update(999, {'name': 'X'}),
        throwsA(
          predicate<AppException>((e) => e.statusCode == 404),
        ),
      );
    });
  });

  // ---------------------------------------------------------------------------
  // delete()
  // ---------------------------------------------------------------------------
  group('WarehouseRepository.delete()', () {
    test('completes without error on 200', () async {
      adapter.onDelete(
        '/warehouses/1',
        (server) => server.reply(200, {'message': 'deleted'}),
      );

      await expectLater(repo.delete(1), completes);
    });

    test('404 response throws AppException', () async {
      adapter.onDelete(
        '/warehouses/999',
        (server) => server.reply(404, {'error': 'not found'}),
      );

      expect(
        () => repo.delete(999),
        throwsA(isA<AppException>()),
      );
    });
  });
}