import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:go_router/go_router.dart';
import 'package:jiu_client/core/auth/auth_state.dart';
import 'package:jiu_client/core/theme/themes.dart';
import 'package:jiu_client/models/shop.dart';
import 'package:jiu_client/providers/shop_provider.dart';
import 'package:jiu_client/providers/license_provider.dart';
import 'package:jiu_client/providers/update_provider.dart';
import 'package:jiu_client/providers/connectivity_provider.dart';
import 'package:jiu_client/providers/session_heartbeat.dart';
import 'package:jiu_client/screens/shell/app_shell.dart';
import 'package:jiu_client/widgets/app_status_bar.dart';

import 'golden_harness.dart';

/// 外壳挂载版 golden 骨架：把屏放进真 AppShell（顶栏+侧栏+状态栏）渲染，
/// 与原型整页截图（fidelity.mjs 的 proto 基准）同构，可直接整屏 diff。
/// 门店/用户/版本对齐原型：鼎晟酒行/DSJH-001、王经理(管理员)、v1.0.72。

class _FakeAuth extends AuthNotifier {
  _FakeAuth() {
    state = const AuthState(
      user: AuthUser(
          accessToken: 't',
          refreshToken: 'r',
          id: 1,
          username: 'wang',
          realName: '王经理',
          shopNo: 'DSJH-001',
          shopId: 1,
          role: 'admin'),
    );
  }
}

class _FakeUpdate extends UpdateNotifier {
  @override
  Future<AppUpdateInfo?> build() async => null;
}

class _FakeLicense extends LicenseNotifier {
  @override
  Future<LicenseInfo?> build() async => null;
}

const _shop = ShopInfo(
    id: 1,
    code: 'DSJH-001',
    name: '鼎晟酒行',
    address: '浙江省杭州市',
    phone: '0571-88886666',
    managerName: '王经理');

/// 外壳自身依赖的 provider 覆盖（认证/门店/授权/更新/网络/心跳/版本）。
List<Override> shellOverrides() => [
      authStateProvider.overrideWith((ref) => _FakeAuth()),
      shopInfoProvider.overrideWith((ref) => _shop),
      licenseProvider.overrideWith(() => _FakeLicense()),
      updateProvider.overrideWith(() => _FakeUpdate()),
      // 跳过联网首检 / 不启动心跳，避免后台 Timer 泄漏
      connectivityProvider
          .overrideWith((ref) => ConnectivityNotifier(skipInit: true)),
      sessionHeartbeatProvider.overrideWith((ref) => SessionHeartbeat(ref)),
      appVersionProvider.overrideWith((ref) => 'v1.0.72'),
      isReadonlyProvider.overrideWithValue(false),
    ];

// 外壳 nav 引用 9 个分支序号（入/出库·库存·财务·往来·基础数据·设备·设置·关于）。
StatefulShellBranch _branch(String path, [WidgetBuilder? builder]) =>
    StatefulShellBranch(routes: [
      GoRoute(
          path: path,
          builder: (ctx, _) => builder?.call(ctx) ?? const SizedBox.expand()),
    ]);

GoRouter _router(String initialPath, WidgetBuilder screen) => GoRouter(
      initialLocation: initialPath,
      routes: [
        StatefulShellRoute.indexedStack(
          builder: (ctx, state, shell) => AppShell(navigationShell: shell),
          branches: [
            for (final p in const [
              '/stock-in',
              '/stock-out',
              '/inventory',
              '/finance',
              '/partners',
              '/products',
              '/devices',
              '/settings',
              '/about',
            ])
              _branch(p, p == initialPath ? screen : null),
          ],
        ),
      ],
    );

/// 在指定主题下把 [screen] 挂进外壳渲染并比对 golden（1280×900@2x 对齐原型）。
Future<void> pumpShellGolden(
  WidgetTester tester, {
  required String path,
  required WidgetBuilder screen,
  required String theme,
  required String goldenName,
  List<Override> overrides = const [],
  Size logical = const Size(1280, 900),
  double dpr = 2.0,
}) async {
  await ensureGoldenFonts();
  // 冻结状态栏时钟，确定化 golden（与 app_shell golden 同基准时刻）。
  AppStatusBar.clock = () => DateTime(2026, 7, 13, 9, 30, 15);
  AppStatusBar.ticking = false;
  tester.view.physicalSize = Size(logical.width * dpr, logical.height * dpr);
  tester.view.devicePixelRatio = dpr;
  addTearDown(tester.view.resetPhysicalSize);
  addTearDown(tester.view.resetDevicePixelRatio);

  await tester.pumpWidget(ProviderScope(
    overrides: [...shellOverrides(), ...overrides],
    child: MaterialApp.router(
      debugShowCheckedModeBanner: false,
      theme: withGoldenFont(buildTheme(theme)),
      routerConfig: _router(path, screen),
    ),
  ));
  await tester.pumpAndSettle();

  await expectLater(
    find.byType(MaterialApp),
    matchesGoldenFile('goldens/$goldenName.png'),
  );
}

/// 「同一屏 × A/B/C 三主题」外壳挂载 golden 组。
void shellGoldenAcrossThemes(
  String description, {
  required String path,
  required WidgetBuilder screen,
  required String goldenPrefix,
  List<Override> Function()? overrides,
  Size logical = const Size(1280, 900),
  double dpr = 2.0,
}) {
  for (final theme in const ['a', 'b', 'c']) {
    testWidgets('$description · theme $theme', (tester) async {
      await pumpShellGolden(
        tester,
        path: path,
        screen: screen,
        theme: theme,
        goldenName: '${goldenPrefix}_$theme',
        overrides: overrides?.call() ?? const [],
        logical: logical,
        dpr: dpr,
      );
    });
  }
}