import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:go_router/go_router.dart';

import '../models/video_item.dart';
import '../providers/auth_provider.dart';
import '../screens/assets/assets_screen.dart';
import '../screens/assets/withdraw_screen.dart';
import '../screens/auth/login_screen.dart';
import '../screens/auth/register_screen.dart';
import '../screens/downloads/downloads_screen.dart';
import '../screens/home/home_shell.dart';
import '../screens/membership/membership_screen.dart';
import '../screens/notification/notifications_screen.dart';
import '../screens/payment/recharge_screen.dart';
import '../screens/payment/usdt_pay_screen.dart';
import '../screens/player/simple_player_screen.dart';
import '../screens/profile/edit_video_screen.dart';
import '../screens/profile/invite_screen.dart';
import '../screens/profile/profile_edit_screen.dart';
import '../screens/profile/user_profile_screen.dart';
import '../screens/profile/video_list_screens.dart';
import '../screens/search/search_screen.dart';
import '../screens/search/tag_videos_screen.dart';
import '../screens/settings/settings_screen.dart';
import '../screens/splash/splash_screen.dart';
import '../screens/upload/upload_screen.dart';
import '../screens/wallet/wallet_screen.dart';
import '../services/payment_service.dart';

/// 声明式路由（02-技术文档：go_router）
/// /home 对游客开放（游客可浏览 Feed，观看超限 2002 时才引导登录）；
/// 受保护页面（上传/钱包/会员等）在各自页面入口校验登录态并跳 /login。
final routerProvider = Provider<GoRouter>((ref) {
  // 认证状态变化仅触发 redirect 重估（refreshListenable），
  // 绝不能 watch 后重建 GoRouter —— 重建会把当前路由重置回启动页，
  // 启动页再次执行 bootstrap → 状态再变化 → 无限循环（卡死在启动页）。
  final refresh = ValueNotifier<int>(0);
  ref.listen(authProvider, (_, __) => refresh.value++);
  ref.onDispose(refresh.dispose);

  return GoRouter(
    initialLocation: '/',
    refreshListenable: refresh,
    redirect: (context, state) {
      final auth = ref.read(authProvider);
      final loggingIn = state.matchedLocation == '/login' ||
          state.matchedLocation == '/register';
      // 启动恢复未完成：停在 splash
      if (!auth.restored && state.matchedLocation != '/') return '/';
      // 已登录去登录页 → 回首页
      if (auth.isLoggedIn && loggingIn) return '/home';
      return null;
    },
    routes: [
      GoRoute(path: '/', builder: (_, __) => const SplashScreen()),
      GoRoute(path: '/login', builder: (_, __) => const LoginScreen()),
      GoRoute(path: '/register', builder: (_, __) => const RegisterScreen()),
      GoRoute(path: '/home', builder: (_, __) => const HomeShell()),
      GoRoute(path: '/search', builder: (_, __) => const SearchScreen()),
      // 标签视频页（游客可）
      GoRoute(
        path: '/tags/:name',
        builder: (_, state) =>
            TagVideosScreen(tagName: state.pathParameters['name']!),
      ),
      // 搜索结果单视频播放（extra 传 VideoItem）
      GoRoute(
        path: '/search/play',
        builder: (_, state) =>
            SimplePlayerScreen(item: state.extra! as VideoItem),
      ),
      // 通用单视频播放（extra 传 VideoItem）— 系列切换/Feed 点击等场景
      GoRoute(
        path: '/player',
        builder: (_, state) =>
            SimplePlayerScreen(item: state.extra! as VideoItem),
      ),
      // 他人公开主页（游客可）
      GoRoute(
        path: '/user/:id',
        builder: (_, state) =>
            UserProfileScreen(userId: int.parse(state.pathParameters['id']!)),
      ),
      // 我的：作品/收藏/历史（页面内需登录，未登录由入口守卫）
      GoRoute(path: '/mine/works', builder: (_, __) => VideoGridScreen.works()),
      // 编辑作品（extra 传 VideoItem，仅作者）
      GoRoute(
        path: '/mine/works/edit',
        builder: (_, state) =>
            EditVideoScreen(video: state.extra! as VideoItem),
      ),
      GoRoute(
        path: '/mine/favorites',
        builder: (_, __) => VideoGridScreen.favorites(),
      ),
      GoRoute(path: '/mine/history', builder: (_, __) => const HistoryScreen()),
      // 已下载（离线可看）
      GoRoute(
        path: '/mine/downloads',
        builder: (_, __) => const DownloadsScreen(),
      ),
      // 编辑资料 / 头像（页面内兜底未登录引导）
      GoRoute(
        path: '/profile/edit',
        builder: (_, __) => const ProfileEditScreen(),
      ),
      // 钱包 / 会员中心（页面内兜底未登录引导）
      GoRoute(path: '/wallet', builder: (_, __) => const WalletScreen()),
      GoRoute(path: '/membership', builder: (_, __) => const MembershipScreen()),
      // 消息通知（页面内兜底未登录引导）
      GoRoute(
        path: '/notifications',
        builder: (_, __) => const NotificationsScreen(),
      ),
      // 发布作品（页面内兜底未登录引导）
      GoRoute(path: '/upload', builder: (_, __) => const UploadScreen()),
      // 邀请好友（页面内需登录）
      GoRoute(path: '/invite', builder: (_, __) => const InviteScreen()),
      // 收益资产 / 提现（页面内兜底未登录引导）
      GoRoute(path: '/assets', builder: (_, __) => const AssetsScreen()),
      GoRoute(
        path: '/assets/withdraw',
        builder: (_, __) => const WithdrawScreen(),
      ),
      // 充值 / USDT 支付（需登录，页面内兜底）
      GoRoute(path: '/recharge', builder: (_, __) => const RechargeScreen()),
      GoRoute(
        path: '/recharge/usdt',
        builder: (_, state) =>
            UsdtPayScreen(order: state.extra! as RechargeOrderInfo),
      ),
      // 设置
      GoRoute(path: '/settings', builder: (_, __) => const SettingsScreen()),
    ],
  );
});