/// 相册列表页签 widget 测试（P3 计划 Task 4）。
///
/// 覆盖：首屏加载与卡片标签行（状态/开关/时区时间/令牌短显）、游标
/// 加载更多（第二页携带 cursor）、空态文案、首屏错误 + 重试恢复。
library;

import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:photo_live/core/api_client.dart';
import 'package:photo_live/core/error_codes.dart';
import 'package:photo_live/features/albums/providers.dart';
import 'package:photo_live/l10n/app_localizations.dart';
import 'package:photo_live/pages/albums_tab.dart';

import '../helpers/fakes.dart';

void main() {
  late FakeSessionStore store;

  setUp(() {
    store = FakeSessionStore();
  });

  ApiClient clientOf(FakeAdapter adapter) => ApiClient(
        sessionStore: store,
        dio: Dio(BaseOptions(baseUrl: 'http://test.local'))
          ..httpClientAdapter = adapter,
      );

  Future<void> pumpTab(WidgetTester tester, ApiClient client) async {
    await tester.pumpWidget(
      ProviderScope(
        overrides: [apiClientProvider.overrideWith((ref) => client)],
        child: MaterialApp(
          localizationsDelegates: AppLocalizations.localizationsDelegates,
          supportedLocales: AppLocalizations.supportedLocales,
          home: const AlbumsTab(),
        ),
      ),
    );
    await tester.pumpAndSettle();
  }

  testWidgets('首屏加载 → 卡片渲染标题/状态/开关标签/时区时间/令牌短显',
      (tester) async {
    final adapter = FakeAdapter(
      (o) => o.path == '/v1/albums'
          ? (200, cursorPageBody([albumJson(
              status: 'offline',
              uploadEnabled: true,
              publicEnabled: false,
              downloadEnabled: true,
              originalDownloadEnabled: false,
            )]))
          : throw StateError('unexpected ${o.path}'),
    );
    await pumpTab(tester, clientOf(adapter));

    expect(find.text('开幕晚宴'), findsOneWidget);
    expect(find.text('Offline'), findsOneWidget);
    // 四个开关标签（色调区分开关，文案一致）。
    expect(find.text('Upload'), findsOneWidget);
    expect(find.text('Public'), findsOneWidget);
    expect(find.text('Download'), findsOneWidget);
    expect(find.text('Original'), findsOneWidget);
    // Asia/Shanghai 墙钟 14:30；结束未定。
    expect(find.text('2026/9/18 14:30 ~ Not set'), findsOneWidget);
    // 令牌短显（前 10 字符 + 省略号）。
    expect(find.text('sharetoken…'), findsOneWidget);
    expect(find.byIcon(Icons.add), findsOneWidget, reason: 'FAB 新建入口');
  });

  testWidgets('滚动接近底部 → 游标加载第二页（携带 cursor）', (tester) async {
    final page1 = List<Map<String, dynamic>>.generate(
      20,
      (i) => albumJson(id: 'alb-${i + 1}'),
    );
    final page2 = List<Map<String, dynamic>>.generate(
      10,
      (i) => albumJson(id: 'alb-${i + 21}'),
    );
    final adapter = FakeAdapter(
      (o) {
        if (o.path != '/v1/albums') throw StateError('unexpected ${o.path}');
        final cursor = o.uri.queryParameters['cursor'];
        if (cursor == null) return (200, cursorPageBody(page1, nextCursor: 'c1'));
        if (cursor == 'c1') return (200, cursorPageBody(page2));
        throw StateError('unexpected cursor $cursor');
      },
    );
    await pumpTab(tester, clientOf(adapter));

    // 首屏只拉第一页（20 条入 state；ListView 懒构建，不逐条断言渲染）。
    expect(adapter.requests, hasLength(1));
    final container = ProviderScope.containerOf(
      tester.element(find.byType(AlbumsTab)),
    );
    expect(container.read(albumListProvider).items, hasLength(20));

    // 上滑触发加载更多。
    await tester.drag(find.byType(ListView), const Offset(0, -2400));
    await tester.pumpAndSettle();

    expect(adapter.requests, hasLength(2));
    expect(
      adapter.requests.last.uri.queryParameters['cursor'],
      'c1',
      reason: '第二页携带游标 c1',
    );
    expect(
      container.read(albumListProvider).items,
      hasLength(30),
      reason: '两页累积',
    );
  });

  testWidgets('空列表 → 空态文案', (tester) async {
    final adapter = FakeAdapter(
      (o) => o.path == '/v1/albums'
          ? (200, cursorPageBody(<Map<String, dynamic>>[]))
          : throw StateError('unexpected ${o.path}'),
    );
    await pumpTab(tester, clientOf(adapter));

    expect(
      find.text('No albums yet. Tap "Create album" to get started'),
      findsOneWidget,
    );
  });

  testWidgets('首屏错误 → 错误视图，重试后恢复', (tester) async {
    var failFirst = true;
    final adapter = FakeAdapter(
      (o) {
        if (o.path != '/v1/albums') throw StateError('unexpected ${o.path}');
        if (failFirst) {
          failFirst = false;
          return (500, errorBody(ErrorCodes.internalError));
        }
        return (200, cursorPageBody([albumJson()]));
      },
    );
    await pumpTab(tester, clientOf(adapter));

    expect(
      find.text('Service temporarily unavailable. Please retry later'),
      findsOneWidget,
    );

    await tester.tap(find.text('Retry'));
    await tester.pumpAndSettle();

    expect(find.text('开幕晚宴'), findsOneWidget);
  });
}