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/stock_out_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);
}

Map<String, dynamic> _orderJson({
  int id = 1,
  String orderNo = 'SO2024010001',
  String status = 'draft',
}) =>
    {
      'id': id,
      'order_no': orderNo,
      'type': 'sale',
      'warehouse_id': 1,
      'warehouse_name': '主仓库',
      'partner_id': 2,
      'partner_name': '王记饭店',
      'operator_id': null,
      'status': status,
      'order_date': '2024-01-05',
      'total_amount': 2000.0,
      'remark': null,
      'items': [],
    };

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

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

  // ---------------------------------------------------------------------------
  // list()
  // ---------------------------------------------------------------------------
  group('StockOutRepository.list()', () {
    test('returns PageResult with orders on 200', () async {
      adapter.onGet(
        '/stock-out/orders',
        (server) => server.reply(200, {
          'data': [_orderJson()],
          'total': 1,
          'page': 1,
          'page_size': 20,
        }),
        queryParameters: {'page': 1, 'page_size': 20},
      );

      final result = await repo.list();

      expect(result.total, 1);
      expect(result.data.length, 1);
      expect(result.data.first.orderNo, 'SO2024010001');
      expect(result.data.first.status, 'draft');
    });

    test('returns empty list without error', () async {
      adapter.onGet(
        '/stock-out/orders',
        (server) => server.reply(200, {
          'data': [],
          'total': 0,
          'page': 1,
          'page_size': 20,
        }),
        queryParameters: {'page': 1, 'page_size': 20},
      );

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

    test('passes status and date params when provided', () async {
      adapter.onGet(
        '/stock-out/orders',
        (server) => server.reply(200, {
          'data': [],
          'total': 0,
          'page': 1,
          'page_size': 20,
        }),
        queryParameters: {
          'page': 1,
          'page_size': 20,
          'status': 'approved',
          'start_date': '2024-01-01',
          'end_date': '2024-01-31',
        },
      );

      final result = await repo.list(
        status: 'approved',
        startDate: '2024-01-01',
        endDate: '2024-01-31',
      );
      expect(result.data, isEmpty);
    });

    test('401 throws AppException', () async {
      adapter.onGet(
        '/stock-out/orders',
        (server) => server.reply(401, {'error': 'unauthorized'}),
        queryParameters: {'page': 1, 'page_size': 20},
      );

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

    test('400 throws AppException with error message', () async {
      adapter.onGet(
        '/stock-out/orders',
        (server) => server.reply(400, {'error': 'invalid filter'}),
        queryParameters: {'page': 1, 'page_size': 20},
      );

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

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

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

  // ---------------------------------------------------------------------------
  // get()
  // ---------------------------------------------------------------------------
  group('StockOutRepository.get()', () {
    test('returns order detail on 200', () async {
      adapter.onGet(
        '/stock-out/orders/1',
        (server) => server.reply(200, {'data': _orderJson(id: 1)}),
      );

      final order = await repo.get(1);

      expect(order.id, 1);
      expect(order.orderNo, 'SO2024010001');
    });

    test('404 throws AppException', () async {
      adapter.onGet(
        '/stock-out/orders/999',
        (server) => server.reply(404, {'error': 'order not found'}),
      );

      expect(
        () => repo.get(999),
        throwsA(predicate<AppException>((e) => e.statusCode == 404)),
      );
    });
  });

  // ---------------------------------------------------------------------------
  // create()
  // ---------------------------------------------------------------------------
  group('StockOutRepository.create()', () {
    test('returns created order on 201', () async {
      final payload = {
        'warehouse_id': 1,
        'partner_id': 2,
        'items': [
          {'product_id': 1, 'quantity': 5.0, 'unit_price': 200.0, 'total_price': 1000.0}
        ]
      };
      adapter.onPost(
        '/stock-out/orders',
        (server) => server.reply(201, {'data': _orderJson(id: 10)}),
        data: payload,
      );

      final order = await repo.create(payload);

      expect(order.id, 10);
    });

    test('400 response throws AppException', () async {
      adapter.onPost(
        '/stock-out/orders',
        (server) => server.reply(400, {'error': 'insufficient stock'}),
        data: {'warehouse_id': 1, 'items': []},
      );

      expect(
        () => repo.create({'warehouse_id': 1, 'items': []}),
        throwsA(isA<AppException>()),
      );
    });
  });

  // ---------------------------------------------------------------------------
  // submit() / approve() / reject()
  // ---------------------------------------------------------------------------
  group('StockOutRepository workflow actions', () {
    test('submit completes without error on 200', () async {
      adapter.onPut(
        '/stock-out/orders/1/submit',
        (server) => server.reply(200, {'message': 'submitted'}),
      );

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

    test('submit 400 throws AppException', () async {
      adapter.onPut(
        '/stock-out/orders/1/submit',
        (server) => server.reply(400, {'error': 'already submitted'}),
      );

      expect(
        () => repo.submit(1),
        throwsA(
          predicate<AppException>(
            (e) => e.message == 'already submitted' && e.statusCode == 400,
          ),
        ),
      );
    });

    test('approve completes without error on 200', () async {
      adapter.onPut(
        '/stock-out/orders/1/approve',
        (server) => server.reply(200, {'message': 'approved'}),
      );

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

    test('approve 400 (insufficient stock) throws AppException', () async {
      adapter.onPut(
        '/stock-out/orders/1/approve',
        (server) => server.reply(400, {'error': 'insufficient stock for product 茅台'}),
      );

      expect(
        () => repo.approve(1),
        throwsA(
          predicate<AppException>(
            (e) => e.message.contains('insufficient stock') && e.statusCode == 400,
          ),
        ),
      );
    });

    test('reject completes without error on 200', () async {
      adapter.onPut(
        '/stock-out/orders/1/reject',
        (server) => server.reply(200, {'message': 'rejected'}),
      );

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

    test('reject 400 throws AppException', () async {
      adapter.onPut(
        '/stock-out/orders/1/reject',
        (server) => server.reply(400, {'error': 'cannot reject approved order'}),
      );

      expect(
        () => repo.reject(1),
        throwsA(isA<AppException>()),
      );
    });
  });
}