import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:jiu_client/core/models/page_result.dart';
import 'package:jiu_client/core/theme/themes.dart';
import 'package:jiu_client/models/partner.dart';
import 'package:jiu_client/providers/license_provider.dart';
import 'package:jiu_client/providers/partner_provider.dart';
import 'package:jiu_client/screens/partners/partners_screen.dart';
import 'package:lucide_icons_flutter/lucide_icons.dart';

/// 往来单位屏（Phase2 重建版：单表 + 类型 chips + 应收应付 + 详情抽屉 + frow 弹窗）。
/// WriteGuard 内层会 watch licenseProvider；覆写成同步返回 normal 授权，避免真实网络请求。
class _FakeLicenseNotifier extends LicenseNotifier {
  @override
  Future<LicenseInfo?> build() async => const LicenseInfo(
        id: 1,
        type: 'annual',
        isActive: true,
        maxDevices: 3,
        phase: 'normal',
      );
}

class _FakePartnerNotifier extends PartnerListNotifier {
  final AsyncValue<PageResult<Partner>> _fixed;

  _FakePartnerNotifier(this._fixed);

  @override
  Future<PageResult<Partner>> build() async {
    state = _fixed;
    return state.value ??
        const PageResult(data: [], total: 0, page: 1, pageSize: 20);
  }

  @override
  void reload() {}
  @override
  void setKeyword(String keyword) {}
  @override
  void setType(String? t) {}
  @override
  void setPage(int page) {}
  @override
  Future<void> createPartner(Map<String, dynamic> data) async {}
  @override
  Future<void> updatePartner(int id, Map<String, dynamic> data) async {}
  @override
  Future<void> deletePartner(int id) async {}
}

/// 永久 loading（build 永不完成）。
class _FakeLoadingPartnerNotifier extends PartnerListNotifier {
  @override
  Future<PageResult<Partner>> build() =>
      Completer<PageResult<Partner>>().future;

  @override
  void reload() {}
  @override
  void setKeyword(String keyword) {}
  @override
  void setType(String? t) {}
  @override
  void setPage(int page) {}
}

Widget _buildApp({
  AsyncValue<PageResult<Partner>> state = const AsyncValue.data(
      PageResult(data: [], total: 0, page: 1, pageSize: 1000)),
}) {
  return ProviderScope(
    overrides: [
      licenseProvider.overrideWith(() => _FakeLicenseNotifier()),
      partnersScreenProvider.overrideWith(() => _FakePartnerNotifier(state)),
      partnerBalancesProvider.overrideWith((ref) async => {
            1: (recv: 126800.0, pay: 0.0),
          }),
      // 抽屉「近期单据」：测试环境不发真实请求
      partnerRecentDocsProvider.overrideWith((ref, id) async => const []),
    ],
    child: MaterialApp(
        theme: buildTheme('a'), home: const Scaffold(body: PartnersScreen())),
  );
}

Widget _buildLoadingApp() {
  return ProviderScope(
    overrides: [
      licenseProvider.overrideWith(() => _FakeLicenseNotifier()),
      partnersScreenProvider.overrideWith(() => _FakeLoadingPartnerNotifier()),
      partnerBalancesProvider.overrideWith((ref) async => {}),
    ],
    child: MaterialApp(
        theme: buildTheme('a'), home: const Scaffold(body: PartnersScreen())),
  );
}

const _partners = [
  Partner(
    id: 1,
    code: 'S001',
    name: '张家酒水供应商',
    type: 'supplier',
    contact: '张三',
    phone: '13800138000',
    address: '北京市朝阳区',
  ),
];

void main() {
  void desktop(WidgetTester tester) {
    tester.view.physicalSize = const Size(1280, 800);
    tester.view.devicePixelRatio = 1.0;
    addTearDown(tester.view.resetPhysicalSize);
  }

  group('PartnersScreen', () {
    testWidgets('loading 态显示 CircularProgressIndicator', (tester) async {
      desktop(tester);
      await tester.pumpWidget(_buildLoadingApp());
      await tester.pump();
      expect(find.byType(CircularProgressIndicator), findsOneWidget);
    });

    testWidgets('错误态显示提示与重试', (tester) async {
      desktop(tester);
      await tester.pumpWidget(
          _buildApp(state: AsyncValue.error('网络错误', StackTrace.empty)));
      await tester.pump();
      expect(find.text('暂无数据，网络不可用'), findsOneWidget);
      expect(find.text('重试'), findsOneWidget);
    });

    testWidgets('空列表显示原型空态文案', (tester) async {
      desktop(tester);
      await tester.pumpWidget(_buildApp());
      await tester.pump();
      expect(find.text('没有匹配的往来单位 · 试试调整筛选或搜索'), findsOneWidget);
    });

    testWidgets('列表显示 名称/联系人/电话/类型徽章/应收应付', (tester) async {
      desktop(tester);
      await tester.pumpWidget(_buildApp(
        state: const AsyncValue.data(
            PageResult(data: _partners, total: 1, page: 1, pageSize: 1000)),
      ));
      await tester.pumpAndSettle();
      expect(find.text('张家酒水供应商'), findsOneWidget);
      expect(find.text('张三'), findsOneWidget);
      expect(find.text('13800138000'), findsOneWidget);
      expect(find.text('供应商'), findsWidgets); // chips + 徽章
      expect(find.text('¥126,800'), findsOneWidget); // 应收（balances 假数据）
    });

    testWidgets('类型 chips 与重置在 toolbar 中', (tester) async {
      desktop(tester);
      await tester.pumpWidget(_buildApp());
      await tester.pump();
      expect(find.text('全部'), findsOneWidget);
      expect(find.text('供应商'), findsOneWidget);
      expect(find.text('客户'), findsOneWidget);
      expect(find.text('重置'), findsOneWidget);
    });

    testWidgets('点「新增往来单位」打开 frow 弹窗，空名保存校验', (tester) async {
      desktop(tester);
      await tester.pumpWidget(_buildApp());
      await tester.pump();

      await tester.tap(find.text('新增往来单位').first);
      await tester.pumpAndSettle();
      // DsField：label 在上（「名称」+ 独立红星），非浮动 labelText
      expect(find.text('名称'), findsOneWidget);
      expect(find.text('期初余额'), findsOneWidget);

      await tester.tap(find.text('保存'));
      await tester.pump();
      expect(find.text('不能为空'), findsAtLeastNWidgets(1));
    });

    testWidgets('铅笔打开预填编辑弹窗，弹窗内可发起删除确认', (tester) async {
      desktop(tester);
      await tester.pumpWidget(_buildApp(
        state: const AsyncValue.data(
            PageResult(data: _partners, total: 1, page: 1, pageSize: 1000)),
      ));
      await tester.pumpAndSettle();

      await tester.tap(find.byIcon(LucideIcons.pencil).first);
      await tester.pumpAndSettle();
      expect(find.text('编辑往来单位'), findsOneWidget);
      expect(find.widgetWithText(TextFormField, '张家酒水供应商'), findsOneWidget);

      await tester.tap(find.text('删除'));
      await tester.pumpAndSettle();
      expect(find.text('确认删除'), findsOneWidget);
      expect(find.textContaining('张家酒水供应商'), findsAtLeastNWidgets(1));
    });

    testWidgets('行点击打开详情抽屉（联系信息 + 应收/应付 + 近期单据）', (tester) async {
      desktop(tester);
      await tester.pumpWidget(_buildApp(
        state: const AsyncValue.data(
            PageResult(data: _partners, total: 1, page: 1, pageSize: 1000)),
      ));
      await tester.pumpAndSettle();

      await tester.tap(find.text('张家酒水供应商'));
      await tester.pump(const Duration(milliseconds: 300));
      expect(find.text('联系信息'), findsOneWidget);
      expect(find.text('应收账款'), findsOneWidget);
      expect(find.text('应付账款'), findsOneWidget);
      expect(find.text('近期单据'), findsOneWidget);
    });
  });
}