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

import '../../providers/session_provider.dart';
import '../../providers/sm_account_provider.dart';
import '../../providers/update_provider.dart';
import '../../shared/app_info.dart';
import '../../shared/theme/app_theme.dart';
import '../../shared/widgets/app_card.dart';
import '../../shared/widgets/app_loading_ring.dart';
import '../../shared/widgets/app_inline_alert.dart';
import '../../shared/widgets/app_sliver_header.dart';
import '../../shared/widgets/page_background.dart';
import '../../shared/widgets/server_avatar.dart';
import '../modules/modules_home_page.dart';
import '../settings/settings_page.dart';

class ProfilePage extends ConsumerWidget {
  const ProfilePage({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final activeSession = ref.watch(activeSessionProvider);
    final account = ref.watch(smAccountProvider).value;
    final appVersion =
        ref.watch(appVersionProvider).value ?? kSmPlayerVersionFallback;
    final updateState = ref.watch(updateProvider);

    return Scaffold(
      backgroundColor: Colors.transparent,
      extendBodyBehindAppBar: true,
      body: Stack(
        children: [
          const Positioned.fill(child: PageBackground()),
          CustomScrollView(
            physics: const AlwaysScrollableScrollPhysics(
              parent: BouncingScrollPhysics(),
            ),
            slivers: [
              const AppSliverHeader(title: '我的'),
              SliverPadding(
                padding: const EdgeInsets.fromLTRB(16, 12, 16, 32),
                sliver: SliverList(
                  delegate: SliverChildListDelegate.fixed([
                    _SearchEntry(onTap: () => context.push('/global-search')),
                    const SizedBox(height: 12),
                    _ServerAccountCard(
                      serverName: activeSession?.serverName ?? '未连接服务器',
                      userName: activeSession?.userName ?? '添加或登录 Emby 服务器',
                      iconUrl: '',
                      active: activeSession != null,
                      onTap: () => context.go('/servers'),
                    ),
                    const SizedBox(height: 12),
                    _SmAccountCard(
                      account: account,
                      onTap: () => context.push('/account-center'),
                    ),
                    const SizedBox(height: 18),
                    const _SectionTitle('快捷入口'),
                    _MenuCard(
                      children: [
                        _ProfileMenuItem(
                          icon: Icons.history_rounded,
                          title: '观看历史',
                          subtitle: '跨服务器继续观看',
                          onTap: () => context.go('/history'),
                        ),
                        _ProfileMenuItem(
                          icon: Icons.favorite_outline_rounded,
                          title: '我的收藏',
                          subtitle: '查看所有服务器收藏',
                          onTap: () => context.go('/favorites-all'),
                        ),
                        _ProfileMenuItem(
                          icon: Icons.new_releases_outlined,
                          title: '最近添加',
                          subtitle: '按服务器聚合最新内容',
                          onTap: () => context.go('/recent'),
                        ),
                      ],
                    ),
                    const SizedBox(height: 18),
                    const _SectionTitle('应用'),
                    _MenuCard(
                      children: [
                        _ProfileMenuItem(
                          icon: Icons.extension_rounded,
                          title: '模块中心',
                          subtitle: '导入、配置与浏览 ForwardWidgets 模块',
                          onTap: () => showModuleCenterSheet(context),
                        ),
                        _ProfileMenuItem(
                          icon: Icons.settings_outlined,
                          title: '设置',
                          subtitle: '播放、账号与外观',
                          onTap: () => showSettingsDialog(context),
                        ),
                        _ProfileMenuItem(
                          icon: Icons.update_outlined,
                          title: '检查更新',
                          subtitle: _updateSubtitle(updateState, appVersion),
                          trailing: updateState.status == UpdateStatus.checking
                              ? const AppLoadingRing(size: 18)
                              : null,
                          onTap:
                              updateState.status == UpdateStatus.checking ||
                                  updateState.status ==
                                      UpdateStatus.downloading ||
                                  updateState.status ==
                                      UpdateStatus.readyToInstall
                              ? null
                              : () => ref
                                    .read(updateProvider.notifier)
                                    .manualCheck(),
                        ),
                      ],
                    ),
                    if (updateState.status == UpdateStatus.error) ...[
                      const SizedBox(height: 12),
                      AppInlineAlert(
                        message: updateState.error ?? '检查更新失败',
                        tone: AppAlertTone.error,
                      ),
                    ],
                  ]),
                ),
              ),
            ],
          ),
        ],
      ),
    );
  }

  String _updateSubtitle(UpdateState state, String appVersion) {
    return switch (state.status) {
      UpdateStatus.checking => '当前版本 $appVersion，正在检查',
      UpdateStatus.upToDate => '当前版本 $appVersion，已是最新版本',
      UpdateStatus.available => '发现新版本 ${state.info?.version ?? ''}',
      UpdateStatus.downloading => '正在下载更新',
      UpdateStatus.readyToInstall => '正在打开安装程序',
      UpdateStatus.error => state.error ?? '检查失败',
      UpdateStatus.idle => '当前版本 $appVersion',
    };
  }
}

class _SearchEntry extends StatelessWidget {
  final VoidCallback onTap;

  const _SearchEntry({required this.onTap});

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    return AppCard(
      onTap: onTap,
      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 14),
      child: Row(
        children: [
          Icon(Icons.search_rounded, color: theme.colorScheme.primary),
          const SizedBox(width: 12),
          Expanded(
            child: Text(
              '搜索电影、剧集、演员',
              style: theme.textTheme.bodyMedium?.copyWith(
                color: theme.colorScheme.onSurface.withValues(alpha: 0.62),
              ),
            ),
          ),
          const Icon(Icons.chevron_right_rounded, size: 20),
        ],
      ),
    );
  }
}

class _ServerAccountCard extends StatelessWidget {
  final String serverName;
  final String userName;
  final String iconUrl;
  final bool active;
  final VoidCallback onTap;

  const _ServerAccountCard({
    required this.serverName,
    required this.userName,
    required this.iconUrl,
    required this.active,
    required this.onTap,
  });

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    return AppCard(
      onTap: onTap,
      padding: const EdgeInsets.all(16),
      child: Row(
        children: [
          ServerAvatar(
            name: serverName,
            iconUrl: iconUrl,
            size: 52,
            isActive: active,
            showActiveBorder: true,
          ),
          const SizedBox(width: 14),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  serverName,
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                  style: theme.textTheme.titleMedium?.copyWith(
                    fontWeight: FontWeight.w700,
                  ),
                ),
                const SizedBox(height: 3),
                Text(
                  userName,
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                  style: theme.textTheme.bodySmall?.copyWith(
                    color: theme.colorScheme.onSurface.withValues(alpha: 0.58),
                  ),
                ),
              ],
            ),
          ),
          const Icon(Icons.chevron_right_rounded),
        ],
      ),
    );
  }
}

class _SmAccountCard extends StatelessWidget {
  final SmAccountState? account;
  final VoidCallback onTap;

  const _SmAccountCard({required this.account, required this.onTap});

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final status = account?.status ?? SmAuthStatus.unauthenticated;
    final loggedIn = status == SmAuthStatus.authenticated;
    final title = loggedIn ? 'player 账号' : '登录 player 账号';
    final subtitle = loggedIn
        ? (account?.email.isNotEmpty == true ? account!.email : '已登录')
        : '用于 TMDB、Trakt 等扩展服务';

    return AppCard(
      onTap: onTap,
      padding: const EdgeInsets.all(16),
      child: Row(
        children: [
          Container(
            width: 42,
            height: 42,
            decoration: BoxDecoration(
              color: theme.colorScheme.primary.withValues(alpha: 0.12),
              borderRadius: BorderRadius.circular(14),
            ),
            child: Icon(
              loggedIn ? Icons.verified_user_outlined : Icons.person_add_alt_1,
              color: theme.colorScheme.primary,
            ),
          ),
          const SizedBox(width: 12),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(title, style: theme.textTheme.titleSmall),
                const SizedBox(height: 3),
                Text(
                  subtitle,
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                  style: theme.textTheme.bodySmall?.copyWith(
                    color: theme.colorScheme.onSurface.withValues(alpha: 0.58),
                  ),
                ),
              ],
            ),
          ),
          const Icon(Icons.chevron_right_rounded),
        ],
      ),
    );
  }
}

class _SectionTitle extends StatelessWidget {
  final String text;

  const _SectionTitle(this.text);

  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.fromLTRB(4, 0, 4, 8),
      child: Text(
        text,
        style: Theme.of(context).textTheme.labelLarge?.copyWith(
          color: context.appTokens.mutedForeground,
          fontWeight: FontWeight.w600,
        ),
      ),
    );
  }
}

class _MenuCard extends StatelessWidget {
  final List<Widget> children;

  const _MenuCard({required this.children});

  @override
  Widget build(BuildContext context) {
    return AppCard(
      padding: EdgeInsets.zero,
      child: Column(
        children: [
          for (var i = 0; i < children.length; i++) ...[
            if (i > 0)
              Divider(
                height: 1,
                indent: 56,
                color: Theme.of(
                  context,
                ).colorScheme.onSurface.withValues(alpha: 0.08),
              ),
            children[i],
          ],
        ],
      ),
    );
  }
}

class _ProfileMenuItem extends StatelessWidget {
  final IconData icon;
  final String title;
  final String? subtitle;
  final Widget? trailing;
  final VoidCallback? onTap;

  const _ProfileMenuItem({
    required this.icon,
    required this.title,
    this.subtitle,
    this.trailing,
    this.onTap,
  });

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    return InkWell(
      onTap: onTap,
      child: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 13),
        child: Row(
          children: [
            Icon(icon, size: 22, color: theme.colorScheme.primary),
            const SizedBox(width: 16),
            Expanded(
              child: Column(
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  Text(title, style: theme.textTheme.bodyMedium),
                  if (subtitle != null) ...[
                    const SizedBox(height: 2),
                    Text(
                      subtitle!,
                      maxLines: 1,
                      overflow: TextOverflow.ellipsis,
                      style: theme.textTheme.bodySmall?.copyWith(
                        color: theme.colorScheme.onSurface.withValues(
                          alpha: 0.54,
                        ),
                      ),
                    ),
                  ],
                ],
              ),
            ),
            trailing ?? const Icon(Icons.chevron_right_rounded, size: 20),
          ],
        ),
      ),
    );
  }
}