import 'dart:io';

import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/foundation.dart' show kIsWeb;
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../features/events/services/events_service.dart';
import '../features/events/models/event_models.dart';
import 'learn_more_screen.dart';
import 'settings_screen.dart';
import '../core/app_decoration.dart';
import '../core/constants.dart';

class ProfileScreen extends StatefulWidget {
  const ProfileScreen({Key? key}) : super(key: key);

  @override
  State<ProfileScreen> createState() => _ProfileScreenState();
}

class _ProfileScreenState extends State<ProfileScreen>
    with SingleTickerProviderStateMixin {
  String _username = '';
  String _email = 'not provided';
  String _profileImage = '';
  final ImagePicker _picker = ImagePicker();

  final EventsService _eventsService = EventsService();

  List<EventModel> _ongoingEvents = [];
  List<EventModel> _upcomingEvents = [];
  List<EventModel> _pastEvents = [];

  bool _loadingEvents = true;

  // Gradient used for EXP bar and rainbow bar (6-color rainbow)
  static const LinearGradient _expGradient = LinearGradient(
    colors: [
      Color(0xFFA855F7), // purple-500
      Color(0xFFEC4899), // pink-500
      Color(0xFFF97316), // orange-500
      Color(0xFFEAB308), // yellow-500
      Color(0xFF22C55E), // green-500
      Color(0xFF3B82F6), // blue-500
    ],
  );

  // Animation state
  late AnimationController _animController;
  double _expProgress = 0.0;
  int _animatedLikes = 0;
  int _animatedPosts = 0;
  int _animatedViews = 0;

  // Target stat values (matching web: 1.2K, 45, 3.4K)
  static const int _targetLikes = 1200;
  static const int _targetPosts = 45;
  static const int _targetViews = 3400;

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

    // Animation controller for EXP bar + stat counters
    _animController = AnimationController(
      vsync: this,
      duration: const Duration(milliseconds: 2000),
    );

    _loadProfile();
    _startAnimations();
  }

  @override
  void dispose() {
    _animController.dispose();
    super.dispose();
  }

  void _startAnimations() {
    // Delay to match React's setTimeout(500ms)
    Future.delayed(const Duration(milliseconds: 500), () {
      if (!mounted) return;

      // Animate EXP bar: 0 → 0.65 with ease-out over 1.3s
      final expTween = Tween<double>(begin: 0.0, end: 0.65);
      final expAnim = CurvedAnimation(
        parent: _animController,
        curve: const Interval(0.0, 0.65, curve: Curves.easeOut),
      );
      // Update fields without setState — AnimatedBuilder handles the rebuilds
      expAnim.addListener(() {
        _expProgress = expTween.evaluate(expAnim);
      });

      _animController.addListener(() {
        final t = _animController.value;
        _animatedLikes = (t * _targetLikes).round();
        _animatedPosts = (t * _targetPosts).round();
        _animatedViews = (t * _targetViews).round();
      });

      _animController.forward();
    });
  }

  /// Format large numbers: ≥1M → "X.XM", ≥1K → "X.XK", else raw
  String _formatNumber(int n) {
    if (n >= 1000000) {
      final val = n / 1000000;
      return '${val.toStringAsFixed(1)}M';
    } else if (n >= 1000) {
      final val = n / 1000;
      return '${val.toStringAsFixed(1)}K';
    }
    return n.toString();
  }

  // ───────── Data Loading (unchanged) ─────────

  Future<void> _loadProfile() async {
    final prefs = await SharedPreferences.getInstance();
    final currentEmail =
        prefs.getString('current_email') ?? prefs.getString('email') ?? '';

    _email = currentEmail.isNotEmpty ? currentEmail : 'not provided';

    final displayKey =
        currentEmail.isNotEmpty ? 'display_name_$currentEmail' : 'display_name';
    final profileImageKey =
        currentEmail.isNotEmpty ? 'profileImage_$currentEmail' : 'profileImage';

    _username = prefs.getString(displayKey) ??
        prefs.getString('display_name') ??
        _email;
    _profileImage =
        prefs.getString(profileImageKey) ?? prefs.getString('profileImage') ?? '';

    await _loadEventsForProfile(prefs);
    if (mounted) setState(() {});
  }

  Future<void> _loadEventsForProfile([SharedPreferences? prefs]) async {
    setState(() {
      _loadingEvents = true;
      _ongoingEvents = [];
      _upcomingEvents = [];
      _pastEvents = [];
    });

    prefs ??= await SharedPreferences.getInstance();
    final pincode = prefs.getString('pincode') ?? 'all';

    try {
      final events = await _eventsService.getEventsByPincode(pincode);

      final now = DateTime.now();
      final today = DateTime(now.year, now.month, now.day);
      final ongoing = <EventModel>[];
      final upcoming = <EventModel>[];
      final past = <EventModel>[];

      DateTime? tryParseDate(String? s) {
        if (s == null) return null;
        try {
          return DateTime.tryParse(s);
        } catch (_) {
          return null;
        }
      }

      for (final e in events) {
        final parsedStart = tryParseDate(e.startDate);
        final parsedEnd = tryParseDate(e.endDate);

        if (parsedStart == null) {
          upcoming.add(e);
        } else if (parsedStart.isAtSameMomentAs(today) ||
            (parsedStart.isBefore(today) &&
                parsedEnd != null &&
                !parsedEnd.isBefore(today))) {
          ongoing.add(e);
        } else if (parsedStart.isBefore(today)) {
          past.add(e);
        } else {
          upcoming.add(e);
        }
      }

      upcoming.sort((a, b) {
        final da = tryParseDate(a.startDate) ?? DateTime(9999);
        final db = tryParseDate(b.startDate) ?? DateTime(9999);
        return da.compareTo(db);
      });
      past.sort((a, b) {
        final da = tryParseDate(a.startDate) ?? DateTime(0);
        final db = tryParseDate(b.startDate) ?? DateTime(0);
        return db.compareTo(da);
      });

      if (mounted) {
        setState(() {
          _ongoingEvents = ongoing;
          _upcomingEvents = upcoming;
          _pastEvents = past;
        });
      }
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context)
            .showSnackBar(SnackBar(content: Text('Failed to load events: $e')));
      }
    } finally {
      if (mounted) setState(() => _loadingEvents = false);
    }
  }

  Future<void> _saveProfile(
      String name, String email, String profileImage) async {
    final prefs = await SharedPreferences.getInstance();
    final currentEmail =
        prefs.getString('current_email') ?? prefs.getString('email') ?? email;

    final displayKey =
        currentEmail.isNotEmpty ? 'display_name_$currentEmail' : 'display_name';
    final profileImageKey =
        currentEmail.isNotEmpty ? 'profileImage_$currentEmail' : 'profileImage';

    await prefs.setString(displayKey, name);
    await prefs.setString(profileImageKey, profileImage);
    await prefs.setString('email', currentEmail);
    await prefs.setString('current_email', currentEmail);

    setState(() {
      _username = name;
      _email = currentEmail.isNotEmpty ? currentEmail : 'not provided';
      _profileImage = profileImage;
    });
  }

  // ───────── Image picking (unchanged) ─────────

  Future<void> _pickFromGallery() async {
    try {
      final XFile? xfile =
          await _picker.pickImage(source: ImageSource.gallery, imageQuality: 85);
      if (xfile == null) return;
      if (kIsWeb) {
        ScaffoldMessenger.of(context).showSnackBar(const SnackBar(
            content:
                Text('Use "Enter Asset Path" on web/desktop or add server URL.')));
        return;
      }
      final String path = xfile.path;
      await _saveProfile(_username, _email, path);
    } catch (e) {
      debugPrint('Image pick error: $e');
      ScaffoldMessenger.of(context)
          .showSnackBar(SnackBar(content: Text('Failed to pick image: $e')));
    }
  }

  Future<void> _enterAssetPathDialog() async {
    final ctl = TextEditingController(text: _profileImage);
    final result = await showDialog<String?>(
      context: context,
      builder: (ctx) {
        // Note: ctl is disposed after dialog closes below
        final theme = Theme.of(ctx);
        return AlertDialog(
          title: const Text('Enter image path or URL'),
          content: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              TextField(
                controller: ctl,
                decoration: const InputDecoration(
                  labelText: 'Asset path (e.g. assets/images/profile.jpg) or URL',
                ),
              ),
              const SizedBox(height: 8),
              Text(
                'Use an asset path (for bundled images) or an https:// URL (web).',
                style:
                    theme.textTheme.bodySmall?.copyWith(color: theme.hintColor),
              ),
            ],
          ),
          actions: [
            TextButton(
                onPressed: () => Navigator.of(ctx).pop(null),
                child: const Text('Cancel')),
            ElevatedButton(
                onPressed: () => Navigator.of(ctx).pop(ctl.text.trim()),
                child: const Text('Use')),
          ],
        );
      },
    );

    ctl.dispose();
    if (result == null || result.isEmpty) return;
    await _saveProfile(_username, _email, result);
  }

  Future<void> _openEditDialog() async {
    final nameCtl = TextEditingController(text: _username);
    final emailCtl = TextEditingController(text: _email);

    showModalBottomSheet(
      context: context,
      isScrollControlled: true,
      backgroundColor: Colors.transparent,
      builder: (ctx) {
        // nameCtl and emailCtl are disposed via .then() below
        final theme = Theme.of(ctx);
        return DraggableScrollableSheet(
          expand: false,
          initialChildSize: 0.44,
          minChildSize: 0.28,
          maxChildSize: 0.92,
          builder: (context, scrollController) {
            return Container(
              padding: const EdgeInsets.fromLTRB(18, 14, 18, 18),
              decoration: BoxDecoration(
                color: theme.cardColor,
                borderRadius:
                    const BorderRadius.vertical(top: Radius.circular(20)),
              ),
              child: SingleChildScrollView(
                controller: scrollController,
                child: Column(
                  children: [
                    Container(
                        width: 48,
                        height: 6,
                        decoration: BoxDecoration(
                            color: theme.dividerColor,
                            borderRadius: BorderRadius.circular(6))),
                    const SizedBox(height: 12),
                    Row(
                      children: [
                        Text('Edit profile',
                            style: theme.textTheme.titleMedium
                                ?.copyWith(fontWeight: FontWeight.bold)),
                        const Spacer(),
                        IconButton(
                          icon: const Icon(Icons.photo_camera),
                          onPressed: () async {
                            Navigator.of(context).pop();
                            await _pickFromGallery();
                          },
                        ),
                        IconButton(
                          icon: const Icon(Icons.link),
                          onPressed: () {
                            Navigator.of(context).pop();
                            _enterAssetPathDialog();
                          },
                        ),
                      ],
                    ),
                    const SizedBox(height: 8),
                    TextField(
                        controller: nameCtl,
                        decoration: InputDecoration(
                            labelText: 'Name',
                            filled: true,
                            fillColor: theme.cardColor,
                            border: OutlineInputBorder(
                                borderRadius: BorderRadius.circular(8)))),
                    const SizedBox(height: 8),
                    TextField(
                        controller: emailCtl,
                        decoration: InputDecoration(
                            labelText: 'Email',
                            filled: true,
                            fillColor: theme.cardColor,
                            border: OutlineInputBorder(
                                borderRadius: BorderRadius.circular(8)))),
                    const SizedBox(height: 14),
                    Row(
                      children: [
                        const Spacer(),
                        TextButton(
                            onPressed: () => Navigator.of(context).pop(),
                            child: const Text('Cancel')),
                        const SizedBox(width: 8),
                        ElevatedButton(
                          onPressed: () async {
                            final newName = nameCtl.text.trim().isEmpty
                                ? _email
                                : nameCtl.text.trim();
                            final newEmail = emailCtl.text.trim().isEmpty
                                ? _email
                                : emailCtl.text.trim();
                            await _saveProfile(newName, newEmail, _profileImage);
                            Navigator.of(context).pop();
                          },
                          child: const Text('Save'),
                        ),
                      ],
                    ),
                    const SizedBox(height: 8),
                    Text(
                      'Tip: tap the camera icon to pick from gallery (mobile). Or tap the link icon to paste an asset path or URL.',
                      style: theme.textTheme.bodySmall
                          ?.copyWith(color: theme.hintColor),
                    ),
                  ],
                ),
              ),
            );
          },
        );
      },
    ).then((_) {
      nameCtl.dispose();
      emailCtl.dispose();
    });
  }

  // ───────── Avatar builder (reused, with size param) ─────────

  Widget _buildProfileAvatar({double size = 96}) {
    final path = _profileImage.trim();
    if (path.startsWith('http')) {
      return ClipOval(
          child: CachedNetworkImage(
              imageUrl: path,
              width: size,
              height: size,
              fit: BoxFit.cover,
              placeholder: (_, __) =>
                  Container(width: size, height: size, color: const Color(0xFFE5E7EB)),
              errorWidget: (_, __, ___) =>
                  Icon(Icons.person, size: size / 2, color: Colors.grey)));
    }
    if (kIsWeb) {
      return ClipOval(
          child: Image.asset(
              path.isNotEmpty ? path : 'assets/images/profile.jpg',
              width: size,
              height: size,
              fit: BoxFit.cover,
              errorBuilder: (_, __, ___) =>
                  Icon(Icons.person, size: size / 2, color: Colors.grey)));
    }
    if (path.isNotEmpty &&
        (path.startsWith('/') || path.contains(Platform.pathSeparator))) {
      final file = File(path);
      if (file.existsSync()) {
        return ClipOval(
            child: Image.file(file,
                width: size,
                height: size,
                fit: BoxFit.cover,
                errorBuilder: (_, __, ___) =>
                    Icon(Icons.person, size: size / 2, color: Colors.grey)));
      }
    }
    return ClipOval(
        child: Image.asset('assets/images/profile.jpg',
            width: size,
            height: size,
            fit: BoxFit.cover,
            errorBuilder: (_, __, ___) =>
                Icon(Icons.person, size: size / 2, color: Colors.grey)));
  }

  // ───────── Event list tile (updated styling) ─────────

  Widget _eventListTileFromModel(EventModel ev, {bool faded = false}) {
    final theme = Theme.of(context);
    final title = ev.title ?? ev.name ?? '';
    final dateLabel =
        (ev.startDate != null && ev.endDate != null && ev.startDate == ev.endDate)
            ? ev.startDate!
            : ((ev.startDate != null && ev.endDate != null)
                ? '${ev.startDate} - ${ev.endDate}'
                : (ev.startDate ?? ''));
    final location = ev.place ?? '';
    final imageUrl = (ev.thumbImg != null && ev.thumbImg!.isNotEmpty)
        ? ev.thumbImg!
        : (ev.images.isNotEmpty ? ev.images.first.image : null);

    final titleStyle = theme.textTheme.bodyLarge?.copyWith(
        fontWeight: FontWeight.w600,
        color: faded ? theme.hintColor : theme.textTheme.bodyLarge?.color);
    final subtitleStyle = theme.textTheme.bodySmall?.copyWith(
        fontSize: 13,
        color: faded
            ? theme.hintColor.withValues(alpha: 0.7)
            : theme.hintColor);

    Widget leadingWidget() {
      if (imageUrl != null && imageUrl.trim().isNotEmpty) {
        if (imageUrl.startsWith('http')) {
          return ClipRRect(
              borderRadius: BorderRadius.circular(12),
              child: CachedNetworkImage(
                  imageUrl: imageUrl,
                  width: 60,
                  height: 60,
                  fit: BoxFit.cover,
                  placeholder: (_, __) => Container(
                      width: 60,
                      height: 60,
                      color: const Color(0xFFE5E7EB)),
                  errorWidget: (_, __, ___) => Container(
                      width: 60,
                      height: 60,
                      color: theme.dividerColor,
                      child: Icon(Icons.image, color: theme.hintColor))));
        } else if (!kIsWeb) {
          final path = imageUrl;
          if (path.startsWith('/') || path.contains(Platform.pathSeparator)) {
            final file = File(path);
            if (file.existsSync()) {
              return ClipRRect(
                  borderRadius: BorderRadius.circular(12),
                  child: Image.file(file,
                      width: 60,
                      height: 60,
                      fit: BoxFit.cover,
                      errorBuilder: (_, __, ___) => Container(
                          width: 60,
                          height: 60,
                          color: theme.dividerColor,
                          child: Icon(Icons.image, color: theme.hintColor))));
            }
          }
        }
        return ClipRRect(
            borderRadius: BorderRadius.circular(12),
            child: Image.asset(imageUrl,
                width: 60,
                height: 60,
                fit: BoxFit.cover,
                errorBuilder: (_, __, ___) => Container(
                    width: 60,
                    height: 60,
                    color: theme.dividerColor,
                    child: Icon(Icons.image, color: theme.hintColor))));
      }
      return Container(
          width: 60,
          height: 60,
          decoration: BoxDecoration(
            color: theme.dividerColor,
            borderRadius: BorderRadius.circular(12),
          ),
          child: Icon(Icons.image, color: theme.hintColor));
    }

    return Container(
      margin: const EdgeInsets.symmetric(vertical: 6),
      decoration: BoxDecoration(
        color: theme.cardColor,
        borderRadius: BorderRadius.circular(16),
        boxShadow: [
          BoxShadow(
              color: Colors.black.withValues(alpha: 0.03),
              blurRadius: 15,
              offset: const Offset(0, 4))
        ],
      ),
      child: ListTile(
        onTap: () {
          if (ev.id != null) {
            Navigator.of(context)
                .push(MaterialPageRoute(builder: (_) => LearnMoreScreen(eventId: ev.id)));
          }
        },
        contentPadding: const EdgeInsets.symmetric(horizontal: 12, vertical: 8),
        leading: leadingWidget(),
        title: Text(title, style: titleStyle),
        subtitle: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            const SizedBox(height: 4),
            Text(dateLabel, style: subtitleStyle),
            const SizedBox(height: 2),
            Text(location, style: subtitleStyle),
          ],
        ),
        trailing: Container(
          width: 40,
          height: 40,
          decoration: BoxDecoration(
              color: theme.colorScheme.primary.withValues(alpha: 0.12),
              borderRadius: BorderRadius.circular(10)),
          child: Icon(Icons.qr_code_scanner, color: theme.colorScheme.primary),
        ),
      ),
    );
  }

  // ═══════════════════════════════════════════════
  //  NEW UI WIDGETS — matching web profile layout
  // ═══════════════════════════════════════════════

  // ───────── Gradient Header ─────────

  Widget _buildGradientHeader(BuildContext context, double height) {
    return Container(
      width: double.infinity,
      height: height,
      decoration: AppDecoration.blueGradient.copyWith(
        borderRadius: const BorderRadius.only(
          bottomLeft: Radius.circular(40),
          bottomRight: Radius.circular(40),
        ),
      ),
      child: SafeArea(
        bottom: false,
        child: Padding(
          padding: const EdgeInsets.fromLTRB(20, 14, 20, 0),
          child: Row(
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              const SizedBox(width: 40), // balance
              const Spacer(),
              Text(
                'Profile',
                style: Theme.of(context).textTheme.titleMedium?.copyWith(
                    color: Colors.white, fontWeight: FontWeight.w600),
              ),
              const Spacer(),
              GestureDetector(
                onTap: () => Navigator.of(context)
                    .push(MaterialPageRoute(builder: (_) => const SettingsScreen())),
                child: Container(
                  width: 40,
                  height: 40,
                  decoration: BoxDecoration(
                      color: Colors.white24,
                      borderRadius: BorderRadius.circular(10)),
                  child: const Icon(Icons.settings, color: Colors.white),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  // ───────── Cover Banner ─────────

  Widget _buildCoverBanner() {
    return Stack(
      children: [
        Container(
          height: 160,
          width: double.infinity,
          decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(16),
            gradient: const LinearGradient(
              colors: [
                Color(0xFFE879A8), // rose/pink tint (page bg bleed)
                Color(0xFF7DD3FC), // sky-300
                Color(0xFF67E8F9), // cyan-300
                Color(0xFF0284C7), // sky-600
              ],
              stops: [0.0, 0.35, 0.6, 1.0],
              begin: Alignment.topLeft,
              end: Alignment.bottomRight,
            ),
          ),
        ),
        // Edit pencil button (top-right, matching web)
        Positioned(
          top: 16,
          right: 16,
          child: GestureDetector(
            onTap: () => _openEditDialog(),
            child: Container(
              width: 36,
              height: 36,
              decoration: BoxDecoration(
                color: Colors.white.withValues(alpha: 0.2),
                shape: BoxShape.circle,
              ),
              child: const Icon(Icons.edit, color: Colors.white, size: 18),
            ),
          ),
        ),
      ],
    );
  }

  // ───────── Avatar overlapping banner + EXP bar ─────────

  Widget _buildAvatarSection() {
    // Use a Stack so the avatar overlaps the bottom of the banner
    return Stack(
      clipBehavior: Clip.none,
      children: [
        // Banner
        _buildCoverBanner(),
        // Avatar positioned at bottom-left, half overlapping
        Positioned(
          bottom: -36,
          left: 16,
          child: GestureDetector(
            onTap: () => _openEditDialog(),
            child: Container(
              decoration: BoxDecoration(
                shape: BoxShape.circle,
                border: Border.all(color: Colors.white, width: 3),
                boxShadow: [
                  BoxShadow(
                    color: Colors.black.withValues(alpha: 0.1),
                    blurRadius: 8,
                    offset: const Offset(0, 2),
                  ),
                ],
              ),
              child: _buildProfileAvatar(size: 80),
            ),
          ),
        ),
      ],
    );
  }

  // ───────── Animated EXP Progress Bar ─────────

  Widget _buildExpBar() {
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 16),
      child: Row(
        children: [
          Text(
            'exp.',
            style: TextStyle(
              fontSize: 14,
              fontWeight: FontWeight.w300,
              color: Colors.grey.shade500,
            ),
          ),
          const SizedBox(width: 8),
          Expanded(
            child: AnimatedBuilder(
              animation: _animController,
              builder: (context, _) => LayoutBuilder(
                builder: (context, constraints) {
                  final fullWidth = constraints.maxWidth;
                  final filledWidth = fullWidth * _expProgress;
                  return Container(
                    height: 8,
                    decoration: BoxDecoration(
                      borderRadius: BorderRadius.circular(4),
                      color: Colors.grey.shade200,
                    ),
                    child: Align(
                      alignment: Alignment.centerLeft,
                      child: Container(
                        width: filledWidth,
                        height: 8,
                        decoration: BoxDecoration(
                          borderRadius: BorderRadius.circular(4),
                          gradient: _expGradient,
                        ),
                      ),
                    ),
                  );
                },
              ),
            ),
          ),
        ],
      ),
    );
  }

  // ───────── Stats Row (animated counters + top/bottom borders) ─────────

  Widget _buildStatsRow() {
    Widget statColumn(String value, String label) {
      return Expanded(
        child: Column(
          mainAxisSize: MainAxisSize.min,
          children: [
            Text(
              value,
              style: const TextStyle(
                fontSize: 24,
                fontWeight: FontWeight.w600,
                color: AppConstants.textPrimary,
              ),
            ),
            const SizedBox(height: 2),
            Text(
              label,
              style: const TextStyle(
                fontSize: 12,
                fontWeight: FontWeight.w300,
                color: AppConstants.textSecondary,
              ),
            ),
          ],
        ),
      );
    }

    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 8),
      padding: const EdgeInsets.symmetric(vertical: 16),
      decoration: BoxDecoration(
        border: Border(
          top: BorderSide(color: Colors.grey.shade200, width: 1),
          bottom: BorderSide(color: Colors.grey.shade200, width: 1),
        ),
      ),
      child: AnimatedBuilder(
        animation: _animController,
        builder: (context, _) => IntrinsicHeight(
          child: Row(
            children: [
              statColumn(_formatNumber(_animatedLikes), 'Likes'),
              VerticalDivider(color: Colors.grey.shade200, thickness: 1, width: 1),
              statColumn(_formatNumber(_animatedPosts), 'Posts'),
              VerticalDivider(color: Colors.grey.shade200, thickness: 1, width: 1),
              statColumn(_formatNumber(_animatedViews), 'Views'),
            ],
          ),
        ),
      ),
    );
  }

  // ───────── Social Icons Row ─────────

  Widget _buildSocialIcons() {
    final icons = [
      Icons.emoji_events_outlined,   // trophy (matching web)
      Icons.camera_alt_outlined,     // instagram camera
      Icons.flutter_dash,            // twitter-like bird
      Icons.layers_outlined,         // layers/stack
    ];

    return Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: icons.map((icon) {
        return Padding(
          padding: const EdgeInsets.symmetric(horizontal: 16),
          child: Icon(icon, size: 24, color: Colors.grey.shade500),
        );
      }).toList(),
    );
  }

  // ───────── Rainbow Bar ─────────

  Widget _buildRainbowBar() {
    return Container(
      height: 4,
      margin: const EdgeInsets.symmetric(horizontal: 24),
      decoration: BoxDecoration(
        borderRadius: BorderRadius.circular(2),
        gradient: _expGradient,
      ),
    );
  }

  // ───────── Profile Card (white, overlapping header) ─────────

  Widget _buildProfileCard(BuildContext context) {
    final theme = Theme.of(context);

    return Container(
      margin: const EdgeInsets.symmetric(horizontal: 16),
      padding: const EdgeInsets.all(16),
      decoration: BoxDecoration(
        color: theme.cardColor,
        borderRadius: BorderRadius.circular(32),
        boxShadow: [
          BoxShadow(
            color: Colors.black.withValues(alpha: 0.03),
            blurRadius: 15,
            offset: const Offset(0, 4),
          ),
        ],
      ),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // Cover Banner + Avatar
          _buildAvatarSection(),

          // Spacer for avatar overflow (avatar extends 36px below banner)
          const SizedBox(height: 44),

          // EXP bar
          _buildExpBar(),
          const SizedBox(height: 16),

          // Name
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 16),
            child: Text(
              _username,
              style: const TextStyle(
                fontSize: 24,
                fontWeight: FontWeight.w600,
                color: AppConstants.textPrimary,
                letterSpacing: -0.3,
              ),
            ),
          ),
          const SizedBox(height: 8),

          // Email
          Padding(
            padding: const EdgeInsets.symmetric(horizontal: 16),
            child: Text(
              _email,
              style: const TextStyle(
                fontSize: 14,
                fontWeight: FontWeight.w300,
                color: AppConstants.textSecondary,
              ),
            ),
          ),
          const SizedBox(height: 24),

          // Stats Row
          _buildStatsRow(),
          const SizedBox(height: 24),

          // Social Icons
          _buildSocialIcons(),
          const SizedBox(height: 16),
        ],
      ),
    );
  }

  // ───────── Event Sections ─────────

  Widget _buildEventSections(BuildContext context) {
    final theme = Theme.of(context);

    Widget sectionHeading(String text) {
      return Text(
        text,
        style: theme.textTheme.titleMedium
            ?.copyWith(fontWeight: FontWeight.w600, fontSize: 18),
      );
    }

    return Padding(
      padding: const EdgeInsets.fromLTRB(18, 16, 18, 0),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        children: [
          // Ongoing Events
          if (_ongoingEvents.isNotEmpty) ...[
            sectionHeading('Ongoing Events'),
            const SizedBox(height: 12),
            Column(
                children:
                    _ongoingEvents.map((e) => _eventListTileFromModel(e)).toList()),
            const SizedBox(height: 24),
          ],

          // Upcoming Events
          sectionHeading('Upcoming Events'),
          const SizedBox(height: 12),
          if (_loadingEvents)
            const SizedBox.shrink()
          else if (_upcomingEvents.isEmpty)
            Padding(
              padding: const EdgeInsets.symmetric(vertical: 12),
              child: Text('No upcoming events',
                  style: theme.textTheme.bodyMedium
                      ?.copyWith(color: theme.hintColor)),
            )
          else
            Column(
                children: _upcomingEvents
                    .map((e) => _eventListTileFromModel(e))
                    .toList()),
          const SizedBox(height: 24),

          // Past Events
          sectionHeading('Past Events'),
          const SizedBox(height: 12),
          if (_loadingEvents)
            const SizedBox.shrink()
          else if (_pastEvents.isEmpty)
            Padding(
              padding: const EdgeInsets.symmetric(vertical: 12),
              child: Text('No past events',
                  style: theme.textTheme.bodyMedium
                      ?.copyWith(color: theme.hintColor)),
            )
          else
            Column(
                children: _pastEvents
                    .map((e) => _eventListTileFromModel(e, faded: true))
                    .toList()),
        ],
      ),
    );
  }

  // ═══════════════════════════════════════════════
  //  BUILD
  // ═══════════════════════════════════════════════

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    const double headerHeight = 200.0;
    const double cardTopOffset = 130.0;

    Widget sectionTitle(String text) => Padding(
          padding: const EdgeInsets.fromLTRB(18, 16, 18, 12),
          child: Text(
            text,
            style: theme.textTheme.titleMedium
                ?.copyWith(fontWeight: FontWeight.w600, fontSize: 18),
          ),
        );

    return Scaffold(
      backgroundColor: theme.scaffoldBackgroundColor,
      // CustomScrollView: only visible event cards are built — no full-tree Column renders
      body: CustomScrollView(
        physics: const BouncingScrollPhysics(),
        slivers: [
          // Header gradient + Profile card overlap (same visual as before)
          SliverToBoxAdapter(
            child: Stack(
              children: [
                _buildGradientHeader(context, headerHeight),
                Padding(
                  padding: EdgeInsets.only(top: cardTopOffset),
                  child: _buildProfileCard(context),
                ),
              ],
            ),
          ),

          // ── Ongoing Events ──
          if (_ongoingEvents.isNotEmpty) ...[
            SliverToBoxAdapter(child: sectionTitle('Ongoing Events')),
            SliverPadding(
              padding: const EdgeInsets.symmetric(horizontal: 18),
              sliver: SliverList(
                delegate: SliverChildBuilderDelegate(
                  (ctx, i) => _eventListTileFromModel(_ongoingEvents[i]),
                  childCount: _ongoingEvents.length,
                ),
              ),
            ),
            const SliverToBoxAdapter(child: SizedBox(height: 24)),
          ],

          // ── Upcoming Events ──
          SliverToBoxAdapter(child: sectionTitle('Upcoming Events')),
          if (_loadingEvents)
            const SliverToBoxAdapter(child: SizedBox.shrink())
          else if (_upcomingEvents.isEmpty)
            SliverToBoxAdapter(
              child: Padding(
                padding: const EdgeInsets.symmetric(horizontal: 18, vertical: 12),
                child: Text('No upcoming events',
                    style: theme.textTheme.bodyMedium
                        ?.copyWith(color: theme.hintColor)),
              ),
            )
          else
            SliverPadding(
              padding: const EdgeInsets.symmetric(horizontal: 18),
              sliver: SliverList(
                delegate: SliverChildBuilderDelegate(
                  (ctx, i) => _eventListTileFromModel(_upcomingEvents[i]),
                  childCount: _upcomingEvents.length,
                ),
              ),
            ),
          const SliverToBoxAdapter(child: SizedBox(height: 24)),

          // ── Past Events ──
          SliverToBoxAdapter(child: sectionTitle('Past Events')),
          if (_loadingEvents)
            const SliverToBoxAdapter(child: SizedBox.shrink())
          else if (_pastEvents.isEmpty)
            SliverToBoxAdapter(
              child: Padding(
                padding: const EdgeInsets.symmetric(horizontal: 18, vertical: 12),
                child: Text('No past events',
                    style: theme.textTheme.bodyMedium
                        ?.copyWith(color: theme.hintColor)),
              ),
            )
          else
            SliverPadding(
              padding: const EdgeInsets.symmetric(horizontal: 18),
              sliver: SliverList(
                delegate: SliverChildBuilderDelegate(
                  (ctx, i) => _eventListTileFromModel(_pastEvents[i], faded: true),
                  childCount: _pastEvents.length,
                ),
              ),
            ),

          const SliverToBoxAdapter(child: SizedBox(height: 32)),
        ],
      ),
    );
  }
}