import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:jiu_client/core/api/api_client.dart';
import 'package:jiu_client/core/auth/auth_state.dart';
import 'package:jiu_client/core/theme/themes.dart';
import 'package:jiu_client/models/product_option.dart';
import 'package:jiu_client/models/stock_in.dart';
import 'package:jiu_client/models/warehouse.dart';
import 'package:jiu_client/providers/stock_in_provider.dart';
import 'package:jiu_client/providers/warehouse_provider.dart';
import 'package:jiu_client/providers/product_option_provider.dart';
import 'package:jiu_client/repositories/stock_in_repository.dart';
import 'package:jiu_client/screens/stock_in/stock_in_form_screen.dart';
import 'package:jiu_client/widgets/ds/grid_combo_cell.dart';

class _FakeWarehouses extends WarehouseListNotifier {
  @override
  Future<List<Warehouse>> build() async =>
      const [Warehouse(id: 1, name: '主仓', isDefault: true)];
}

/// 可配置仓库列表的假 notifier（T5 默认仓填充回归用）。
class _ConfigurableWarehouses extends WarehouseListNotifier {
  final List<Warehouse> _list;
  _ConfigurableWarehouses(this._list);
  @override
  Future<List<Warehouse>> build() async => _list;
}

/// 编辑模式假仓库：get() 返回固定单据（供 _loadEditOrder 消费）。
class _FakeStockInRepoForEdit extends StockInRepository {
  final StockInOrder order;
  _FakeStockInRepoForEdit(this.order) : super(ApiClient(token: 't'));

  @override
  Future<StockInOrder> get(int id) async => order;
}

class _FakeNames extends ProductNameListNotifier {
  @override
  Future<List<ProductNameOption>> build() async => const [
        ProductNameOption(id: 10, name: '茅台飞天', code: 'P001'),
        ProductNameOption(id: 11, name: '五粮液', code: 'P002'),
      ];
}

class _FakeSeries extends ProductSeriesListNotifier {
  @override
  Future<List<ProductSeriesOption>> build() async => const [
        ProductSeriesOption(id: 20, name: '53度'),
      ];
}

class _FakeSpecs extends ProductSpecListNotifier {
  @override
  Future<List<ProductSpecOption>> build() async => const [
        ProductSpecOption(id: 30, name: '500ml'),
      ];
}

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();
  SharedPreferences.setMockInitialValues({});

  testWidgets('stock-in form: picking 商品名称 fills the cell', (tester) async {
    tester.view.physicalSize = const Size(1400, 1000);
    tester.view.devicePixelRatio = 1.0;
    addTearDown(tester.view.resetPhysicalSize);

    await tester.pumpWidget(ProviderScope(
      overrides: [
        warehouseListProvider.overrideWith(() => _FakeWarehouses()),
        productNameListProvider.overrideWith(() => _FakeNames()),
        productSeriesListProvider.overrideWith(() => _FakeSeries()),
        productSpecListProvider.overrideWith(() => _FakeSpecs()),
        isReadonlyProvider.overrideWithValue(false),
      ],
      child: MaterialApp(
        theme: buildTheme('a'),
        home: const Scaffold(body: StockInFormScreen()),
      ),
    ));
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 100));

    // Tap the 商品名称 cell to focus/open its popup.
    final nameCell = find.text('选择商品名称');
    expect(nameCell, findsWidgets);
    await tester.tap(nameCell.first);
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 100));

    // The option list should appear.
    expect(find.text('五粮液'), findsWidgets,
        reason: 'popup list should show options');

    // Tap the option.
    await tester.tap(find.text('五粮液').last);
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 100));

    // After picking, the cell should display 五粮液 and the hint should be gone.
    expect(find.text('五粮液'), findsOneWidget,
        reason: 'cell should show the picked name');
    expect(find.text('选择商品名称'), findsNothing,
        reason: 'hint should be replaced by the picked name');
  });

  // ── T5：新建入库单默认填充默认仓库（2026-07-14）──────────────────────
  //
  // _initWarehouseDefault 语义：仓库列表加载完成后，
  //   isDefault 的仓 优先；无默认时仅剩 1 个仓才取它；否则保持未选（null）。
  //   编辑模式不受影响（_loadEditOrder 已从单据自身仓库回填）。

  int? _warehouseSelectedId(WidgetTester tester) => tester
      .widgetList<GridComboCell>(find.byType(GridComboCell))
      .firstWhere((c) => c.hint == '选择仓库…')
      .selectedId;

  Future<void> _pumpForm(WidgetTester tester, List<Override> overrides,
      {int? editOrderId}) async {
    tester.view.physicalSize = const Size(1400, 1000);
    tester.view.devicePixelRatio = 1.0;
    addTearDown(tester.view.resetPhysicalSize);
    await tester.pumpWidget(ProviderScope(
      overrides: overrides,
      child: MaterialApp(
        theme: buildTheme('a'),
        home: Scaffold(body: StockInFormScreen(editOrderId: editOrderId)),
      ),
    ));
    await tester.pump();
    await tester.pump(const Duration(milliseconds: 100));
    // _initWarehouseDefault / _loadEditOrder 都是异步（await provider.future），
    // 多 pump 几拍确保 setState 落地。
    await tester.pump(const Duration(milliseconds: 100));
  }

  testWidgets('新建入库单：有默认仓（isDefault=true）时自动选中默认仓',
      (tester) async {
    await _pumpForm(tester, [
      warehouseListProvider.overrideWith(() => _FakeWarehouses()), // 主仓 isDefault
      productNameListProvider.overrideWith(() => _FakeNames()),
      productSeriesListProvider.overrideWith(() => _FakeSeries()),
      productSpecListProvider.overrideWith(() => _FakeSpecs()),
      isReadonlyProvider.overrideWithValue(false),
    ]);
    expect(_warehouseSelectedId(tester), 1);
  });

  testWidgets('新建入库单：无默认仓且多仓时保持未选', (tester) async {
    await _pumpForm(tester, [
      warehouseListProvider.overrideWith(() => _ConfigurableWarehouses(const [
            Warehouse(id: 1, name: '主仓', isDefault: false),
            Warehouse(id: 2, name: '分仓', isDefault: false),
          ])),
      productNameListProvider.overrideWith(() => _FakeNames()),
      productSeriesListProvider.overrideWith(() => _FakeSeries()),
      productSpecListProvider.overrideWith(() => _FakeSpecs()),
      isReadonlyProvider.overrideWithValue(false),
    ]);
    expect(_warehouseSelectedId(tester), isNull);
  });

  testWidgets('新建入库单：无默认仓但仅有 1 个仓时自动选中该仓', (tester) async {
    await _pumpForm(tester, [
      warehouseListProvider.overrideWith(() => _ConfigurableWarehouses(const [
            Warehouse(id: 7, name: '唯一仓', isDefault: false),
          ])),
      productNameListProvider.overrideWith(() => _FakeNames()),
      productSeriesListProvider.overrideWith(() => _FakeSeries()),
      productSpecListProvider.overrideWith(() => _FakeSpecs()),
      isReadonlyProvider.overrideWithValue(false),
    ]);
    expect(_warehouseSelectedId(tester), 7);
  });

  testWidgets('编辑模式：不被默认仓覆盖，仍显示单据原仓库', (tester) async {
    const order = StockInOrder(
      id: 99,
      orderNo: 'SI2024010099',
      warehouseId: 2, // 单据原仓库 = 分仓（非默认仓）
      status: 'draft',
      items: [],
    );
    await _pumpForm(
      tester,
      [
        // 主仓（id=1）isDefault=true，若默认仓填充逻辑误在编辑模式生效会把它选中，
        // 但单据自身仓库是 id=2，回归断言二者不一致时以单据为准。
        warehouseListProvider.overrideWith(() => _ConfigurableWarehouses(const [
              Warehouse(id: 1, name: '主仓', isDefault: true),
              Warehouse(id: 2, name: '分仓', isDefault: false),
            ])),
        stockInRepositoryProvider
            .overrideWithValue(_FakeStockInRepoForEdit(order)),
        productNameListProvider.overrideWith(() => _FakeNames()),
        productSeriesListProvider.overrideWith(() => _FakeSeries()),
        productSpecListProvider.overrideWith(() => _FakeSpecs()),
        isReadonlyProvider.overrideWithValue(false),
      ],
      editOrderId: 99,
    );
    expect(_warehouseSelectedId(tester), 2);
  });
}