import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:package_info_plus/package_info_plus.dart';
import '../providers/app_provider.dart';
import '../utils/user_prefs.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'reviewed_stamp_icon.dart';
import '../pages/explore/encounter_page.dart';
import '../pages/explore/stroll_page.dart';
import '../pages/explore/reviewed_page.dart';
import '../pages/playlist/playlist_list_page.dart';
import '../pages/explore/media_calendar_page.dart';
import '../pages/people/person_list_page.dart';
import '../pages/markdown_reader/md_reader_tab_page.dart';
import '../pages/epub_reader/epub_library_page.dart';
import '../pages/settings/tag_management_page.dart';
import '../pages/movies/movie_detail_page.dart';
import '../pages/movies/movie_form_page.dart';
import '../pages/book/book_detail_page.dart';
import '../pages/book/book_form_page.dart';
import '../pages/note/note_detail_page.dart';
import '../pages/note/note_form_page.dart';
import '../pages/game/game_detail_page.dart';
import '../pages/profile/settings_page.dart';
import '../models/data_models.dart';
import 'fade_in_local_image.dart';

/// 自定义侧边栏
class CustomDrawer extends StatefulWidget {
  final bool embedded;
  const CustomDrawer({super.key, this.embedded = false});

  @override
  State<CustomDrawer> createState() => _CustomDrawerState();
}

class _CustomDrawerState extends State<CustomDrawer> {
  String _version = '0.1.5';

  // 热力图缓存
  int _cachedMoviesHash = 0;
  int _cachedBooksHash = 0;
  int _cachedNotesHash = 0;
  int _cachedGamesHash = 0;
  Map<DateTime, int>? _cachedDailyCounts;
  int? _cachedMaxCount;

  // 最近添加缓存
  List<_RecentItem>? _cachedRecentItems;

  /// 用列表长度 + 首末元素ID生成轻量哈希，避免 identical() 在 Provider 返回新实例时永远失败
  int _listHash<T>(List<T> list) {
    if (list.isEmpty) return 0;
    final first = list.first;
    final last = list.last;
    return Object.hash(list.length, first, last);
  }

  bool _isHeatmapCacheValid(List<Movie> movies, List<Book> books, List<Note> notes, List<Game> games) {
    return _cachedDailyCounts != null &&
        _cachedMoviesHash == _listHash(movies) &&
        _cachedBooksHash == _listHash(books) &&
        _cachedNotesHash == _listHash(notes) &&
        _cachedGamesHash == _listHash(games);
  }

  bool _isRecentCacheValid(List<Movie> movies, List<Book> books, List<Note> notes, List<Game> games) {
    return _cachedRecentItems != null &&
        _cachedMoviesHash == _listHash(movies) &&
        _cachedBooksHash == _listHash(books) &&
        _cachedNotesHash == _listHash(notes) &&
        _cachedGamesHash == _listHash(games);
  }

  @override
  void initState() {
    super.initState();
    _loadVersionInfo();
  }

  Future<void> _loadVersionInfo() async {
    final packageInfo = await PackageInfo.fromPlatform();
    if (mounted) setState(() => _version = packageInfo.version);
  }

  @override
  Widget build(BuildContext context) {
    final colors = Theme.of(context).colorScheme;
    final userPrefs = UserPrefs();
    final showHeatmap = userPrefs.showSidebarHeatmap;
    final showRecent = userPrefs.showSidebarRecent;
    final showQuickActions = userPrefs.showSidebarQuickActions;
    final showTools = userPrefs.showSidebarEncounter ||
        userPrefs.showSidebarStroll ||
        userPrefs.showSidebarReviewed ||
        userPrefs.showSidebarPlaylist ||
        userPrefs.showSidebarCalendar ||
        userPrefs.showSidebarPerson ||
        userPrefs.showSidebarTags ||
        userPrefs.showSidebarMdReader ||
        userPrefs.showSidebarEpub;

    final content = SafeArea(
      child: SingleChildScrollView(
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            _buildProfileCard(context),
            if (showQuickActions) ...[
              const SizedBox(height: 12),
              _buildQuickActions(context),
            ],
            if (showHeatmap) ...[
              const SizedBox(height: 16),
              _buildCalendarSection(context),
            ],
            if (showRecent) ...[
              const SizedBox(height: 16),
              _buildRecentSection(context),
            ],
            if (showTools) ...[
              const SizedBox(height: 16),
              _buildToolsCard(context),
            ],
            Padding(
              padding: const EdgeInsets.fromLTRB(20, 20, 20, 16),
              child: Row(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
                  Text('v$_version', style: TextStyle(fontSize: 11, color: colors.onSurface.withValues(alpha: 0.2))),
                  const SizedBox(width: 16),
                  GestureDetector(
                    onTap: () {
                      if (!widget.embedded) Navigator.pop(context);
                      Navigator.push(context, MaterialPageRoute(builder: (_) => const SettingsPage()));
                    },
                    child: Icon(Icons.settings_outlined, size: 14, color: colors.onSurface.withValues(alpha: 0.2)),
                  ),
                ],
              ),
            ),
            const SizedBox(height: 16),
          ],
        ),
      ),
    );

    if (widget.embedded) return content;
    return Drawer(
      backgroundColor: colors.surfaceContainerHigh,
      child: content,
    );
  }

  // ─── 头像 + 统计卡片 ─────────────────────────────────────────────────

  Widget _buildProfileCard(BuildContext context) {
    return Consumer<AppProvider>(
      builder: (context, provider, child) {
        final colors = Theme.of(context).colorScheme;
        final userPrefs = UserPrefs();
        final nickname = userPrefs.nickname;
        final motto = userPrefs.motto;
        final avatarPath = userPrefs.avatarPath;
        final movieCount = provider.movies.where((m) => !m.isDeleted).length;
        final bookCount = provider.books.length;
        final noteCount = provider.notes.length;
        final gameCount = provider.games.where((g) => !g.isDeleted).length;

        // 根据功能开关过滤显示的统计项
        final statItems = <(IconData, int, String, Color)>[];
        if (userPrefs.showMovieTab) statItems.add((Icons.movie_outlined, movieCount, '观影', const Color(0xFF2563EB)));
        if (userPrefs.showBookTab) statItems.add((Icons.menu_book_outlined, bookCount, '阅读', const Color(0xFF16A34A)));
        if (userPrefs.showNoteTab) statItems.add((Icons.note_outlined, noteCount, '笔记', const Color(0xFF9333EA)));
        if (userPrefs.showGameTab) statItems.add((Icons.sports_esports_outlined, gameCount, '游戏', const Color(0xFFEA580C)));

        return Container(
          margin: const EdgeInsets.fromLTRB(16, 16, 16, 0),
          padding: const EdgeInsets.all(16),
          decoration: BoxDecoration(
            color: colors.surface,
            borderRadius: BorderRadius.circular(16),
          ),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                children: [
                  Container(
                    width: 44,
                    height: 44,
                    decoration: BoxDecoration(
                      shape: BoxShape.circle,
                      color: colors.surfaceContainerHighest,
                      border: Border.all(color: colors.outlineVariant, width: 0.5),
                    ),
                    clipBehavior: Clip.antiAlias,
                    child: avatarPath != null && avatarPath.isNotEmpty
                        ? FadeInLocalImage(path: avatarPath, fit: BoxFit.cover,
                            errorWidget: Icon(Icons.person_outline, size: 22, color: colors.onSurface.withValues(alpha: 0.3)))
                        : Icon(Icons.person_outline, size: 22, color: colors.onSurface.withValues(alpha: 0.3)),
                  ),
                  const SizedBox(width: 12),
                  Expanded(
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        Text(nickname, style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600, color: colors.onSurface)),
                        const SizedBox(height: 2),
                        Text(motto, maxLines: 2, overflow: TextOverflow.ellipsis,
                            style: TextStyle(fontSize: 12, color: colors.onSurface.withValues(alpha: 0.35))),
                      ],
                    ),
                  ),
                ],
              ),
              if (statItems.isNotEmpty) ...[
                const SizedBox(height: 14),
                Row(
                  children: statItems.map((item) {
                    final (icon, count, label, color) = item;
                    return Expanded(
                      child: Column(
                        mainAxisSize: MainAxisSize.min,
                        children: [
                          Text(_formatCount(count), style: TextStyle(fontSize: 16, fontWeight: FontWeight.w700, color: color)),
                          const SizedBox(height: 2),
                          Row(
                            mainAxisAlignment: MainAxisAlignment.center,
                            mainAxisSize: MainAxisSize.min,
                            children: [
                              Icon(icon, size: 11, color: colors.onSurface.withValues(alpha: 0.4)),
                              const SizedBox(width: 3),
                              Text(label, style: TextStyle(fontSize: 10, color: colors.onSurface.withValues(alpha: 0.4))),
                            ],
                          ),
                        ],
                      ),
                    );
                  }).toList(),
                ),
              ],
            ],
          ),
        );
      },
    );
  }

  String _formatCount(int count) {
    if (count >= 10000) return '${(count / 10000).toStringAsFixed(1)}万';
    if (count >= 1000) return '${(count / 1000).toStringAsFixed(1)}k';
    return count.toString();
  }

  // ─── 快捷操作 ──────────────────────────────────────────────────────

  Widget _buildQuickActions(BuildContext context) {
    final colors = Theme.of(context).colorScheme;
    final userPrefs = UserPrefs();

    final actions = <(IconData, String, Color, VoidCallback)>[];
    if (userPrefs.showMovieTab) actions.add((
      Icons.add_photo_alternate_outlined, '影视', const Color(0xFF2563EB),
      () { if (!widget.embedded) { Navigator.pop(context); } Navigator.push(context, MaterialPageRoute(builder: (_) => const MovieFormPage())); },
    ));
    if (userPrefs.showBookTab) actions.add((
      Icons.menu_book_outlined, '阅读', const Color(0xFF16A34A),
      () { if (!widget.embedded) { Navigator.pop(context); } Navigator.push(context, MaterialPageRoute(builder: (_) => const BookFormPage())); },
    ));
    if (userPrefs.showNoteTab) actions.add((
      Icons.edit_note_outlined, '笔记', const Color(0xFF9333EA),
      () { if (!widget.embedded) { Navigator.pop(context); } Navigator.push(context, MaterialPageRoute(builder: (_) => const NoteFormPage())); },
    ));

    if (actions.isEmpty) return const SizedBox.shrink();

    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 16),
      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 10),
      decoration: BoxDecoration(
        color: colors.surface,
        borderRadius: BorderRadius.circular(16),
      ),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: actions.map((action) {
          final (icon, label, color, onTap) = action;
          return Expanded(
            child: GestureDetector(
              onTap: onTap,
              behavior: HitTestBehavior.opaque,
              child: Padding(
                padding: const EdgeInsets.symmetric(vertical: 4),
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    Container(
                      width: 36, height: 36,
                      decoration: BoxDecoration(
                        color: color.withValues(alpha: 0.1),
                        borderRadius: BorderRadius.circular(10),
                      ),
                      child: Icon(icon, size: 18, color: color),
                    ),
                    const SizedBox(height: 4),
                    Text(label, style: TextStyle(fontSize: 11, fontWeight: FontWeight.w500, color: colors.onSurface.withValues(alpha: 0.6))),
                  ],
                ),
              ),
            ),
          );
        }).toList(),
      ),
    );
  }

  // ─── 功能入口卡片 ────────────────────────────────────────────────────

  Widget _buildToolsCard(BuildContext context) {
    final colors = Theme.of(context).colorScheme;
    final userPrefs = UserPrefs();

    final exploreItems = <(Widget, String, Widget)>[];
    if (userPrefs.showSidebarEncounter) exploreItems.add((SvgPicture.string('<svg viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" width="20" height="20"><path d="M518.217143 432.64V73.142857A73.142857 73.142857 0 0 1 603.428571 1.097143 512 512 0 0 1 1022.902857 420.571429 73.142857 73.142857 0 0 1 950.857143 505.782857H591.36a73.142857 73.142857 0 0 1-73.142857-73.142857z" fill="currentColor"/><path d="M493.714286 566.857143h340.297143a73.142857 73.142857 0 0 1 73.142857 85.577143A457.142857 457.142857 0 1 1 371.565714 117.76a73.142857 73.142857 0 0 1 85.577143 73.142857V530.285714a36.571429 36.571429 0 0 0 36.571429 36.571429z" fill="currentColor"/></svg>', color: colors.onSurface), '统计', const EncounterPage()));
    if (userPrefs.showSidebarStroll) exploreItems.add((SvgPicture.string('<svg viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" width="20" height="20"><path d="M261.156045 240.64C117.796045 240.64 0.036045 358.4 0.036045 505.856a219.648 219.648 0 0 0 16.8448 88.4224C37.924045 657.408 113.700045 771.072 244.208845 922.624l4.1984 4.1984c8.3968 8.448 21.0432 8.448 29.44-4.1984 130.5088-155.7504 202.0864-265.216 227.328-328.3456 8.448-29.4912 16.8448-58.9312 16.8448-88.4224 0-147.3024-117.76-265.216-261.12-265.216z m0 349.44A88.9344 88.9344 0 0 1 172.631245 501.76 86.272 86.272 0 0 1 261.156045 413.3888a88.4224 88.4224 0 0 1 0 176.7936zM724.106445 47.104c-96.8192 0-172.5952 80.0256-172.5952 176.8448a249.1392 249.1392 0 0 0 8.3968 58.9312c16.8448 42.0864 67.3792 117.76 151.552 223.0784a18.944 18.944 0 0 0 21.0432 0c88.4224-105.216 138.9568-176.7936 151.552-223.0784 8.448-16.8448 8.448-37.888 8.448-58.9312A168.2944 168.2944 0 0 0 724.106445 47.104z m0 235.776a57.5488 57.5488 0 0 1-58.9312-58.9312 58.9312 58.9312 0 0 1 117.76 0 60.2624 60.2624 0 0 1-58.9312 58.9312z m-8.448 698.7776c-155.7504 0-311.5008-54.7328-324.1472-58.9312a19.968 19.968 0 0 1 12.6464-37.888c4.1984 0 416.768 143.36 555.6736-37.888 12.6464-16.8448 21.0432-42.0864 16.8448-63.1296s-12.6464-37.888-29.4912-50.5344c-33.6384-25.2416-79.9744-42.0864-143.36-50.4832-46.08-8.448-84.1728-37.888-96.8192-75.776a93.1328 93.1328 0 0 1-4.1984-33.6896 21.0432 21.0432 0 0 1 42.0864 0 38.0928 38.0928 0 0 0 4.1984 21.0432 79.36 79.36 0 0 0 63.3856 50.7392c67.3792 12.5952 122.112 29.44 160 58.9312 25.2416 16.8448 42.0864 46.08 50.4832 79.9744a120.4224 120.4224 0 0 1-25.2416 92.6208c-67.328 79.9744-172.5952 105.216-282.0608 105.216z m0 0" fill="currentColor"/></svg>', color: colors.onSurface), '漫步', const StrollPage()));
    if (userPrefs.showSidebarReviewed) exploreItems.add((SvgPicture.string('<svg viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" width="20" height="20"><path d="M550.4 755.2V298.496c0-36.352 12.8-67.584 38.4-93.696 26.112-25.6 57.344-38.4 93.696-38.4h213.504L900.096 256c0 2.048 0 4.608 0.512 7.168 0.512 2.56 1.536 5.12 2.56 7.168 0.512 2.56 2.048 4.608 3.072 6.656 1.536 2.048 3.072 4.096 5.12 6.144 1.536 1.536 3.584 3.072 5.632 4.608 2.048 1.536 4.608 2.56 6.656 3.584 2.56 1.024 4.608 1.536 7.168 2.048 2.56 0.512 5.12 1.024 7.68 1.024 2.56 0 5.12-0.512 7.168-1.024 2.56-0.512 5.12-1.024 7.68-2.048 2.048-1.024 4.096-2.048 6.656-3.584 2.048-1.536 3.584-3.072 5.632-4.608l4.608-6.144c1.536-2.048 2.56-4.096 3.584-6.656 1.024-2.048 1.536-4.608 2.048-7.168 0.512-2.56 1.024-5.12 1.024-7.168V170.496c0-22.528-8.192-41.472-24.064-57.344-15.36-15.872-34.816-23.552-56.832-23.552h-213.504c-57.856 0-107.008 19.968-147.968 60.928-8.192 8.704-15.872 17.408-22.528 26.624-7.168-9.216-14.336-17.92-23.04-26.624-40.96-40.96-90.112-60.928-147.968-60.928H128c-22.528 0-41.984 7.68-57.344 23.552-15.872 15.872-24.064 34.816-24.064 57.344v554.496c0 22.528 8.192 41.472 24.064 57.344 15.36 15.872 34.816 24.064 57.344 24.064h256c24.576 0 45.568 8.704 62.976 26.112 17.408 17.408 26.112 38.4 26.624 62.976 0 2.048 0 5.12 0.512 7.68 0.512 2.56 1.024 5.12 2.048 7.168 1.024 2.56 2.048 4.608 3.584 6.656l4.608 6.144 6.144 4.608c2.048 1.536 4.096 2.56 6.656 3.584 2.048 1.024 4.608 1.536 7.168 2.048 2.56 0.512 5.12 1.024 7.68 1.024 2.048 0 4.096-0.512 6.656-1.024 2.048 0 4.096-1.024 6.144-1.536 2.048-1.024 4.096-1.536 6.144-3.072 2.048-1.024 3.584-2.048 5.632-3.584 1.536-2.048 7.168-8.192 8.704-10.24 1.024-2.048 2.048-4.096 2.56-6.144 1.024-2.048 1.536-4.096 1.536-6.656 0.512-1.024 1.024-5.12 1.024-6.144v-140.8z m-76.8 0c-26.624-17.408-56.32-25.6-89.6-25.6h-256L123.392 170.496l217.6-4.096c36.864 0 67.584 12.8 93.696 38.4 25.6 25.6 38.4 56.832 38.912 93.184v457.216z m503.296-328.704a38.5536 38.5536 0 0 1-11.264 27.136l-170.496 170.496c-2.048 2.048-4.096 3.584-6.144 5.12-2.048 1.024-4.096 2.56-6.656 3.072-2.048 1.024-4.608 2.048-7.168 2.56-2.56 0.512-5.12 0.512-7.168 0.512-2.56 0-5.12 0-7.68-0.512a29.5936 29.5936 0 0 1-7.168-2.56c-2.56-0.512-4.608-2.048-6.656-3.072a54.272 54.272 0 0 1-6.144-5.12l-84.992-84.992a34.2528 34.2528 0 0 1-8.192-12.8 36.1472 36.1472 0 0 1-3.072-14.336c0-2.56 0-5.12 0.512-7.68 0.512-2.56 1.536-5.12 2.56-7.168 0.512-2.56 2.048-4.608 3.072-6.656 1.536-2.048 3.072-4.096 5.12-6.144 1.536-1.536 3.584-3.072 5.632-4.608 2.048-1.536 4.608-2.56 6.656-3.584 2.56-1.024 4.608-1.536 7.168-2.048 2.56-0.512 5.12-0.512 7.68-0.512 5.12 0 9.728 0.512 14.848 2.56 4.608 2.048 8.704 4.608 12.288 8.192L768 542.72l143.36-143.36c3.584-3.584 7.68-6.656 12.288-8.192 4.608-2.048 9.728-3.072 14.848-3.072 2.56 0 5.12 0 7.168 0.512 2.56 0.512 5.12 1.536 7.68 2.56 2.048 0.512 4.096 2.048 6.656 3.072a50.9952 50.9952 0 0 1 10.24 10.752c1.536 2.048 2.56 4.608 3.584 6.656 1.024 2.56 1.536 4.608 2.048 7.168 0.512 2.56 1.024 5.12 1.024 7.68z m0 243.2v55.296c0 22.528-8.192 41.472-24.064 57.344-15.36 15.872-34.816 24.064-56.832 24.064h-256c-25.088 0-46.08 8.704-63.488 26.112-17.408 17.408-26.112 38.4-26.112 63.488v-140.8c26.112-17.408 55.808-25.6 89.6-25.6h256l4.096-59.904c0-2.56 0-5.12 0.512-7.68 0.512-2.56 1.536-4.608 2.56-7.168 0.512-2.048 2.048-4.608 3.072-6.656 1.536-2.048 3.072-4.096 5.12-5.632 1.536-2.048 3.584-3.584 5.632-5.12 2.048-1.024 4.608-2.56 6.656-3.072 2.56-1.024 4.608-2.048 7.168-2.56 2.56-0.512 5.12-0.512 7.68-0.512a31.488 31.488 0 0 1 14.848 3.072c2.048 0.512 4.096 2.048 6.656 3.072a50.9952 50.9952 0 0 1 10.24 10.752c1.536 2.048 2.56 4.608 3.584 6.656 1.024 2.56 1.536 4.608 2.048 7.168 0.512 2.56 1.024 5.12 1.024 7.68z" fill="currentColor"/></svg>', color: colors.onSurface), '已阅', const ReviewedPage()));
    if (userPrefs.showSidebarPlaylist) exploreItems.add((SvgPicture.string('<svg viewBox="0 0 1024 1024" xmlns="http://www.w3.org/2000/svg" width="20" height="20"><path d="M864 42.666667a32 32 0 0 1 31.850667 28.928L896 74.666667v874.666666a32 32 0 0 1-28.928 31.850667L864 981.333333h-704a32 32 0 0 1-31.850667-28.928L128 949.333333v-874.666666a32 32 0 0 1 28.928-31.850667L160 42.666667h704z m-533.333333 714.666666H192V917.333333h138.666667v-160z m298.666666-213.333333h-234.666666V917.333333h234.666666V544z m202.666667 213.333333h-138.666667V917.333333H832v-160z m0-213.333333h-138.666667v149.333333H832v-149.333333z m-501.333333 0H192v149.333333h138.666667v-149.333333z m0-213.333333H192v149.333333h138.666667v-149.333333zM629.333333 106.666667h-234.666666v373.333333h234.666666V106.666667zM832 330.666667h-138.666667v149.333333H832v-149.333333zM832 106.666667h-138.666667v160H832V106.666667zM330.666667 106.666667H192v160h138.666667V106.666667z" fill="currentColor"/></svg>', color: colors.onSurface), '书影片单', const PlaylistListPage()));
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    if (userPrefs.showSidebarMdReader) toolItems.add((Icon(Icons.description_outlined, size: 20, color: colors.onSurface), 'MD阅读', const MdReaderTabPage()));
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    if (exploreItems.isEmpty && toolItems.isEmpty) return const SizedBox.shrink();

    return Column(
      crossAxisAlignment: CrossAxisAlignment.start,
      children: [
        if (exploreItems.isNotEmpty) ...[
          _buildGroupTitle('探索', colors),
          const SizedBox(height: 6),
          _buildGroupCard(context, exploreItems),
        ],
        if (toolItems.isNotEmpty) ...[
          const SizedBox(height: 16),
          _buildGroupTitle('工具', colors),
          const SizedBox(height: 6),
          _buildGroupCard(context, toolItems),
        ],
      ],
    );
  }

  Widget _buildGroupTitle(String title, ColorScheme colors) {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 20),
      child: Text(title, style: TextStyle(fontSize: 11, fontWeight: FontWeight.w600, color: colors.onSurface.withValues(alpha: 0.3), letterSpacing: 1)),
    );
  }

  Widget _buildGroupCard(BuildContext context, List<(Widget, String, Widget)> items) {
    final colors = Theme.of(context).colorScheme;
    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 16),
      decoration: BoxDecoration(
        color: colors.surface,
        borderRadius: BorderRadius.circular(16),
      ),
      child: Column(
        children: List.generate(items.length * 2 - 1, (i) {
          if (i.isOdd) {
            return Divider(height: 1, indent: 52, endIndent: 20, color: colors.outlineVariant);
          }
          final idx = i ~/ 2;
          final (icon, title, page) = items[idx];
          return _buildToolItem(icon, title, () {
            if (!widget.embedded) Navigator.pop(context);
            Navigator.push(context, MaterialPageRoute(builder: (_) => page));
          }, topRounded: idx == 0, bottomRounded: idx == items.length - 1);
        }),
      ),
    );
  }

  Widget _buildToolItem(Widget icon, String title, VoidCallback onTap, {bool topRounded = false, bool bottomRounded = false, bool enabled = true}) {
    final colors = Theme.of(context).colorScheme;
    final effectiveOnTap = enabled ? onTap : null;
    final iconOpacity = enabled ? 0.7 : 0.25;
    final textOpacity = enabled ? 1.0 : 0.35;
    return InkWell(
      onTap: effectiveOnTap,
      borderRadius: BorderRadius.only(
        topLeft: topRounded ? const Radius.circular(16) : Radius.zero,
        topRight: topRounded ? const Radius.circular(16) : Radius.zero,
        bottomLeft: bottomRounded ? const Radius.circular(16) : Radius.zero,
        bottomRight: bottomRounded ? const Radius.circular(16) : Radius.zero,
      ),
      child: Padding(
        padding: const EdgeInsets.symmetric(vertical: 14, horizontal: 20),
        child: Row(
          children: [
            SizedBox(width: 20, height: 20, child: Opacity(opacity: iconOpacity, child: icon)),
            const SizedBox(width: 12),
            Expanded(child: Text(title, style: TextStyle(fontSize: 14, fontWeight: FontWeight.w500, color: colors.onSurface.withValues(alpha: textOpacity)))),
            Icon(Icons.chevron_right, size: 16, color: colors.onSurface.withValues(alpha: 0.2)),
          ],
        ),
      ),
    );
  }

  // ─── 热力图 ──────────────────────────────────────────────────────────

  // ─── 热力图缓存计算 ───

  (int, Map<DateTime, int>) _computeDailyCounts(List<Movie> movies, List<Book> books, List<Note> notes, List<Game> games) {
    if (_isHeatmapCacheValid(movies, books, notes, games)) {
      return (_cachedMaxCount!, _cachedDailyCounts!);
    }

    final dailyCounts = <DateTime, int>{};
    for (final movie in movies.where((m) => !m.isDeleted)) {
      final date = DateTime(movie.createdAt.year, movie.createdAt.month, movie.createdAt.day);
      dailyCounts[date] = (dailyCounts[date] ?? 0) + 1;
    }
    for (final book in books.where((b) => !b.isDeleted)) {
      final date = DateTime(book.createdAt.year, book.createdAt.month, book.createdAt.day);
      dailyCounts[date] = (dailyCounts[date] ?? 0) + 1;
    }
    for (final note in notes.where((n) => !n.isDeleted)) {
      final date = DateTime(note.createdAt.year, note.createdAt.month, note.createdAt.day);
      dailyCounts[date] = (dailyCounts[date] ?? 0) + 1;
    }
    for (final game in games.where((g) => !g.isDeleted)) {
      final date = DateTime(game.createdAt.year, game.createdAt.month, game.createdAt.day);
      dailyCounts[date] = (dailyCounts[date] ?? 0) + 1;
    }

    int maxCount = 0;
    for (final c in dailyCounts.values) {
      if (c > maxCount) maxCount = c;
    }
    if (maxCount == 0) maxCount = 1;

    _cachedMoviesHash = _listHash(movies);
    _cachedBooksHash = _listHash(books);
    _cachedNotesHash = _listHash(notes);
    _cachedGamesHash = _listHash(games);
    _cachedDailyCounts = dailyCounts;
    _cachedMaxCount = maxCount;
    return (maxCount, dailyCounts);
  }

  List<_RecentItem> _computeRecentItems(List<Movie> movies, List<Book> books, List<Note> notes, List<Game> games) {
    if (_isRecentCacheValid(movies, books, notes, games)) {
      return _cachedRecentItems!;
    }

    final items = <_RecentItem>[];
    for (final m in movies.where((m) => !m.isDeleted)) {
      items.add(_RecentItem(type: 'movie', title: m.title, date: m.createdAt, data: m, imagePath: m.posterPath));
    }
    for (final b in books.where((b) => !b.isDeleted)) {
      items.add(_RecentItem(type: 'book', title: b.title, date: b.createdAt, data: b, imagePath: b.coverPath));
    }
    for (final n in notes.where((n) => !n.isDeleted)) {
      items.add(_RecentItem(type: 'note', title: n.title.isNotEmpty ? n.title : '随手记', date: n.createdAt, data: n));
    }
    for (final g in games.where((g) => !g.isDeleted)) {
      items.add(_RecentItem(type: 'game', title: g.title, date: g.createdAt, data: g, imagePath: g.coverPath));
    }
    items.sort((a, b) => b.date.compareTo(a.date));

    _cachedMoviesHash = _listHash(movies);
    _cachedBooksHash = _listHash(books);
    _cachedNotesHash = _listHash(notes);
    _cachedGamesHash = _listHash(games);
    _cachedRecentItems = items;
    return items;
  }

  Widget _buildCalendarSection(BuildContext context) {
    final movies = context.select<AppProvider, List<Movie>>((p) => p.movies);
    final books = context.select<AppProvider, List<Book>>((p) => p.books);
    final notes = context.select<AppProvider, List<Note>>((p) => p.notes);
    final games = context.select<AppProvider, List<Game>>((p) => p.games);
    final colors = Theme.of(context).colorScheme;

    final (maxCount, dailyCounts) = _computeDailyCounts(movies, books, notes, games);

        final now = DateTime.now();
        final today = DateTime(now.year, now.month, now.day);
        final daysSinceSunday = today.weekday % 7;
        final lastSunday = today.subtract(Duration(days: daysSinceSunday));

        const totalWeeks = 20;
        const weekDays = 7;
        const cellGap = 1.5;
        // 可用宽度 = drawer宽度 - margin(16*2) - container padding(18*2)
        final drawerWidth = widget.embedded ? 260.0 : MediaQuery.sizeOf(context).width;
        final availableWidth = drawerWidth - 32 - 36;
        final cellSize = ((availableWidth - (totalWeeks - 1) * cellGap) / totalWeeks).clamp(6.0, 10.0);

        final cells = List.generate(weekDays, (_) => List.generate(totalWeeks, (_) => 0));
        for (int week = 0; week < totalWeeks; week++) {
          for (int day = 0; day < weekDays; day++) {
            final date = lastSunday.subtract(Duration(days: (totalWeeks - 1 - week) * 7 + (6 - day)));
            cells[day][week] = dailyCounts[date] ?? 0;
          }
        }

        // 连续打卡天数
        int streak = 0;
        for (int i = 0; i < 365; i++) {
          final date = today.subtract(Duration(days: i));
          if (dailyCounts[date] != null && dailyCounts[date]! > 0) {
            streak++;
          } else {
            break;
          }
        }

        final monthLabels = <int, String>{};
        for (int week = 0; week < totalWeeks; week++) {
          final date = lastSunday.subtract(Duration(days: (totalWeeks - 1 - week) * 7));
          final key = date.month;
          if (!monthLabels.containsKey(key) || date.day <= 7) {
            monthLabels[week] = '${date.month}月';
          }
        }
        final sortedWeeks = monthLabels.keys.toList()..sort();
        final keepWeeks = {sortedWeeks.first, sortedWeeks[sortedWeeks.length ~/ 2], sortedWeeks.last};

        return Container(
          margin: const EdgeInsets.symmetric(horizontal: 16),
          padding: const EdgeInsets.all(18),
          decoration: BoxDecoration(color: colors.surface, borderRadius: BorderRadius.circular(16)),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              Row(
                children: [
                  Icon(Icons.calendar_today, size: 14, color: colors.onSurface.withValues(alpha: 0.4)),
                  const SizedBox(width: 8),
                  Text('热力图', style: TextStyle(fontSize: 13, fontWeight: FontWeight.w500, color: colors.onSurface.withValues(alpha: 0.6))),
                  const Spacer(),
                  if (streak > 0) ...[
                    Icon(Icons.local_fire_department, size: 14, color: const Color(0xFFFF6D00)),
                    const SizedBox(width: 3),
                    Text('连续 $streak 天', style: TextStyle(fontSize: 11, fontWeight: FontWeight.w500, color: const Color(0xFFFF6D00))),
                  ],
                ],
              ),
              const SizedBox(height: 14),
              Column(
                mainAxisSize: MainAxisSize.min,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                    SizedBox(
                      height: 16,
                      child: Row(
                        children: List.generate(totalWeeks, (week) {
                          final label = keepWeeks.contains(week) ? monthLabels[week] : null;
                          return SizedBox(
                            width: week < totalWeeks - 1 ? cellSize + cellGap : cellSize,
                            child: label != null ? Text(label, style: TextStyle(fontSize: 9, color: colors.onSurface.withValues(alpha: 0.3))) : null,
                          );
                        }),
                      ),
                    ),
                    const SizedBox(height: 2),
                    ...List.generate(weekDays, (day) => Row(
                      children: List.generate(totalWeeks, (week) {
                        final count = cells[day][week];
                        final date = lastSunday.subtract(Duration(days: (totalWeeks - 1 - week) * 7 + (6 - day)));
                        return GestureDetector(
                          onTap: count > 0 ? () => _showDayDetail(context, date, dailyCounts[date] ?? 0, movies, books, notes, games) : null,
                          child: Tooltip(
                            message: '${date.month}月${date.day}日${count > 0 ? ' · $count条' : ''}',
                            child: Container(
                              width: cellSize, height: cellSize,
                              margin: EdgeInsets.only(right: week < totalWeeks - 1 ? cellGap : 0, bottom: day < weekDays - 1 ? cellGap : 0),
                              decoration: BoxDecoration(
                                color: _heatmapColor(count, maxCount),
                                borderRadius: BorderRadius.circular(2),
                                border: count > 0 ? null : Border.all(color: colors.outlineVariant.withValues(alpha: 0.3), width: 0.5),
                              ),
                            ),
                          ),
                        );
                      }),
                    )),
                  ],
                ),
              const SizedBox(height: 8),
              Row(
                mainAxisAlignment: MainAxisAlignment.end,
                children: [
                  Text('少', style: TextStyle(fontSize: 9, color: colors.onSurface.withValues(alpha: 0.3))),
                  const SizedBox(width: 3),
                  _legendCell(const Color(0xFFF0F0F0)),
                  _legendCell(const Color(0xFFC8E6C9)),
                  _legendCell(const Color(0xFF66BB6A)),
                  _legendCell(const Color(0xFF2E7D32)),
                  _legendCell(const Color(0xFF1B5E20)),
                  const SizedBox(width: 3),
                  Text('多', style: TextStyle(fontSize: 9, color: colors.onSurface.withValues(alpha: 0.3))),
                ],
              ),
            ],
          ),
        );
  }

  void _showDayDetail(BuildContext context, DateTime date, int count, List<Movie> movies, List<Book> books, List<Note> notes, List<Game> games) {
    final colors = Theme.of(context).colorScheme;
    final dayMovies = movies.where((m) => !m.isDeleted && DateTime(m.createdAt.year, m.createdAt.month, m.createdAt.day) == date).toList();
    final dayBooks = books.where((b) => !b.isDeleted && DateTime(b.createdAt.year, b.createdAt.month, b.createdAt.day) == date).toList();
    final dayNotes = notes.where((n) => !n.isDeleted && DateTime(n.createdAt.year, n.createdAt.month, n.createdAt.day) == date).toList();
    final dayGames = games.where((g) => !g.isDeleted && DateTime(g.createdAt.year, g.createdAt.month, g.createdAt.day) == date).toList();

    showModalBottomSheet(
      context: context,
      backgroundColor: colors.surface,
      shape: const RoundedRectangleBorder(borderRadius: BorderRadius.vertical(top: Radius.circular(16))),
      builder: (ctx) => SafeArea(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Container(width: 36, height: 4, margin: const EdgeInsets.only(top: 12, bottom: 8),
                decoration: BoxDecoration(color: colors.onSurface.withValues(alpha: 0.15), borderRadius: BorderRadius.circular(2))),
            Padding(
              padding: const EdgeInsets.fromLTRB(20, 4, 20, 12),
              child: Row(
                children: [
                  Text('${date.month}月${date.day}日', style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600, color: colors.onSurface)),
                  const SizedBox(width: 8),
                  Text('$count条记录', style: TextStyle(fontSize: 13, color: colors.onSurface.withValues(alpha: 0.45))),
                ],
              ),
            ),
            Flexible(
              child: ListView(
                shrinkWrap: true,
                padding: const EdgeInsets.only(bottom: 12),
                children: [
                  if (dayMovies.isNotEmpty) ...[
                    for (final m in dayMovies) _dayDetailItem(ctx, Icons.movie_outlined, m.title, colors.primary),
                  ],
                  if (dayBooks.isNotEmpty) ...[
                    for (final b in dayBooks) _dayDetailItem(ctx, Icons.menu_book_outlined, b.title, const Color(0xFF16A34A)),
                  ],
                  if (dayNotes.isNotEmpty) ...[
                    for (final n in dayNotes) _dayDetailItem(ctx, Icons.note_outlined, n.title.isNotEmpty ? n.title : '随手记', const Color(0xFF9333EA)),
                  ],
                  if (dayGames.isNotEmpty) ...[
                    for (final g in dayGames) _dayDetailItem(ctx, Icons.sports_esports_outlined, g.title, const Color(0xFFEA580C)),
                  ],
                ],
              ),
            ),
          ],
        ),
      ),
    );
  }

  Widget _dayDetailItem(BuildContext ctx, IconData icon, String title, Color color) {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 6),
      child: Row(
        children: [
          Container(
            width: 28, height: 28,
            decoration: BoxDecoration(color: color.withValues(alpha: 0.1), borderRadius: BorderRadius.circular(7)),
            child: Icon(icon, size: 15, color: color),
          ),
          const SizedBox(width: 12),
          Expanded(child: Text(title, maxLines: 1, overflow: TextOverflow.ellipsis,
              style: TextStyle(fontSize: 14, color: Theme.of(ctx).colorScheme.onSurface))),
        ],
      ),
    );
  }

  Color _heatmapColor(int count, int maxCount) {
    if (count == 0) return const Color(0xFFF0F0F0);
    final ratio = count / maxCount;
    if (ratio <= 0.25) return const Color(0xFFC8E6C9);
    if (ratio <= 0.50) return const Color(0xFF66BB6A);
    if (ratio <= 0.75) return const Color(0xFF2E7D32);
    return const Color(0xFF1B5E20);
  }

  Widget _legendCell(Color color) {
    return Container(width: 10, height: 10, margin: const EdgeInsets.symmetric(horizontal: 1),
        decoration: BoxDecoration(color: color, borderRadius: BorderRadius.circular(2)));
  }

  // ─── 最近添加 ────────────────────────────────────────────────────────

  Widget _buildRecentSection(BuildContext context) {
    final movies = context.select<AppProvider, List<Movie>>((p) => p.movies);
    final books = context.select<AppProvider, List<Book>>((p) => p.books);
    final notes = context.select<AppProvider, List<Note>>((p) => p.notes);
    final games = context.select<AppProvider, List<Game>>((p) => p.games);
    final colors = Theme.of(context).colorScheme;
    final recent = _computeRecentItems(movies, books, notes, games);
    if (recent.isEmpty) return const SizedBox.shrink();

    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 16),
      padding: const EdgeInsets.all(18),
      decoration: BoxDecoration(color: colors.surface, borderRadius: BorderRadius.circular(16)),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          Row(
            children: [
              Icon(Icons.schedule, size: 14, color: colors.onSurface.withValues(alpha: 0.4)),
              const SizedBox(width: 8),
              Text('最近添加', style: TextStyle(fontSize: 13, fontWeight: FontWeight.w500, color: colors.onSurface.withValues(alpha: 0.6))),
            ],
          ),
          const SizedBox(height: 14),
          ...recent.take(6).map((item) => InkWell(
            onTap: () => _openRecentItem(context, item),
            borderRadius: BorderRadius.circular(8),
            child: Padding(
              padding: const EdgeInsets.only(bottom: 10, top: 2),
              child: Row(
                children: [
                  _buildRecentLeading(item, colors),
                  const SizedBox(width: 10),
                  Expanded(
                    child: Text(item.title, maxLines: 1, overflow: TextOverflow.ellipsis,
                        style: TextStyle(fontSize: 13, color: colors.onSurface.withValues(alpha: 0.75))),
                  ),
                  const SizedBox(width: 8),
                  Text(_recentTimeAgo(item.date), style: TextStyle(fontSize: 10, color: colors.onSurface.withValues(alpha: 0.25))),
                ],
              ),
            ),
          )),
        ],
      ),
    );
  }

  void _openRecentItem(BuildContext context, _RecentItem item) {
    if (!widget.embedded) Navigator.pop(context);
    switch (item.type) {
      case 'movie':
        Navigator.push(context, MaterialPageRoute(builder: (_) => MovieDetailPage(movie: item.data as Movie)));
      case 'book':
        Navigator.push(context, MaterialPageRoute(builder: (_) => BookDetailPage(book: item.data as Book)));
      case 'note':
        Navigator.push(context, MaterialPageRoute(builder: (_) => NoteDetailPage(note: item.data as Note)));
      case 'game':
        Navigator.push(context, MaterialPageRoute(builder: (_) => GameDetailPage(game: item.data as Game)));
    }
  }

  String _recentTimeAgo(DateTime date) {
    final diff = DateTime.now().difference(date);
    if (diff.inDays >= 365) return '${(diff.inDays / 365).floor()}年前';
    if (diff.inDays >= 30) return '${(diff.inDays / 30).floor()}月前';
    if (diff.inDays > 0) return '${diff.inDays}天前';
    if (diff.inHours > 0) return '${diff.inHours}小时前';
    return '刚刚';
  }

  Widget _buildRecentLeading(_RecentItem item, ColorScheme colors) {
    final imagePath = item.imagePath;
    if (imagePath != null && imagePath.isNotEmpty) {
      return Container(
        width: 22, height: 22,
        decoration: BoxDecoration(
          borderRadius: BorderRadius.circular(5),
        ),
        clipBehavior: Clip.antiAlias,
        child: FadeInLocalImage(
          path: imagePath,
          fit: BoxFit.cover,
          errorWidget: _buildRecentTypeIcon(item, colors),
        ),
      );
    }
    return _buildRecentTypeIcon(item, colors);
  }

  Widget _buildRecentTypeIcon(_RecentItem item, ColorScheme colors) {
    return Container(
      width: 22, height: 22,
      decoration: BoxDecoration(
        color: _typeColor(item.type).withValues(alpha: 0.1),
        borderRadius: BorderRadius.circular(5),
      ),
      child: Icon(
        item.type == 'movie' ? Icons.movie_outlined : item.type == 'book' ? Icons.menu_book_outlined : item.type == 'game' ? Icons.sports_esports_outlined : Icons.note_outlined,
        size: 12, color: _typeColor(item.type),
      ),
    );
  }

  Color _typeColor(String type) {
    return switch (type) {
      'movie' => const Color(0xFF2563EB),
      'book' => const Color(0xFF16A34A),
      'note' => const Color(0xFF9333EA),
      'game' => const Color(0xFFEA580C),
      _ => const Color(0xFF6B7280),
    };
  }
}

class _RecentItem {
  final String type;
  final String title;
  final DateTime date;
  final dynamic data;
  final String? imagePath;
  _RecentItem({required this.type, required this.title, required this.date, required this.data, this.imagePath});
}