import 'dart:io';
import 'dart:ui' as ui;
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:path_provider/path_provider.dart';
import 'package:share_plus/share_plus.dart';
import '../../widgets/tier_avatar_ring.dart';

class ShareRankCard extends StatefulWidget {
  final String username;
  final String tier;
  final int rank;
  final int ep;
  final int rewardPoints;

  const ShareRankCard({
    super.key,
    required this.username,
    required this.tier,
    required this.rank,
    required this.ep,
    this.rewardPoints = 0,
  });

  @override
  State<ShareRankCard> createState() => _ShareRankCardState();
}

class _ShareRankCardState extends State<ShareRankCard> {
  final GlobalKey _boundaryKey = GlobalKey();
  bool _sharing = false;

  static const _tierGradients = {
    'Bronze':   [Color(0xFF92400E), Color(0xFFD97706)],
    'Silver':   [Color(0xFF475569), Color(0xFF94A3B8)],
    'Gold':     [Color(0xFF92400E), Color(0xFFFBBF24)],
    'Platinum': [Color(0xFF4C1D95), Color(0xFF8B5CF6)],
    'Diamond':  [Color(0xFF1E3A8A), Color(0xFF60A5FA)],
  };

  List<Color> get _gradient {
    return _tierGradients[widget.tier] ?? [const Color(0xFF0F172A), const Color(0xFF1E293B)];
  }

  Future<void> _share() async {
    if (_sharing) return;
    setState(() => _sharing = true);
    try {
      final boundary = _boundaryKey.currentContext!.findRenderObject() as RenderRepaintBoundary;
      final image = await boundary.toImage(pixelRatio: 3.0);
      final byteData = await image.toByteData(format: ui.ImageByteFormat.png);
      if (byteData == null) return;
      final bytes = byteData.buffer.asUint8List();

      final tempDir = await getTemporaryDirectory();
      final file = File('${tempDir.path}/eventify_rank_${widget.username}.png');
      await file.writeAsBytes(bytes);

      await Share.shareXFiles(
        [XFile(file.path)],
        text: 'I\'m ranked #${widget.rank} on Eventify with ${widget.ep} EP! 🏆 #Eventify #Kerala',
      );
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('Could not share rank card')),
        );
      }
    } finally {
      if (mounted) setState(() => _sharing = false);
    }
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        RepaintBoundary(
          key: _boundaryKey,
          child: Container(
            width: 320,
            padding: const EdgeInsets.all(24),
            decoration: BoxDecoration(
              gradient: const LinearGradient(
                begin: Alignment.topLeft,
                end: Alignment.bottomRight,
                colors: [Color(0xFF0F172A), Color(0xFF1E293B)],
              ),
              borderRadius: BorderRadius.circular(20),
            ),
            child: Column(
              mainAxisSize: MainAxisSize.min,
              children: [
                // Tier gradient header bar
                Container(
                  height: 6,
                  decoration: BoxDecoration(
                    gradient: LinearGradient(colors: _gradient),
                    borderRadius: BorderRadius.circular(3),
                  ),
                ),
                const SizedBox(height: 20),
                // Avatar
                TierAvatarRing(username: widget.username, tier: widget.tier, size: 80),
                const SizedBox(height: 12),
                // Username
                Text(
                  widget.username,
                  style: const TextStyle(fontSize: 20, fontWeight: FontWeight.w800, color: Colors.white),
                ),
                const SizedBox(height: 4),
                // Tier badge
                Container(
                  padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
                  decoration: BoxDecoration(
                    gradient: LinearGradient(colors: _gradient),
                    borderRadius: BorderRadius.circular(12),
                  ),
                  child: Text(
                    widget.tier.isEmpty ? 'Contributor' : widget.tier,
                    style: const TextStyle(fontSize: 12, fontWeight: FontWeight.w700, color: Colors.white),
                  ),
                ),
                const SizedBox(height: 20),
                // Stats row
                Row(
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  children: [
                    _stat('Rank', '#${widget.rank}'),
                    Container(width: 1, height: 40, color: Colors.white12),
                    _stat('EP', '${widget.ep}'),
                    Container(width: 1, height: 40, color: Colors.white12),
                    _stat('RP', '${widget.rewardPoints}'),
                  ],
                ),
                const SizedBox(height: 20),
                // Branding
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: const [
                    Icon(Icons.bolt, size: 14, color: Color(0xFF3B82F6)),
                    SizedBox(width: 4),
                    Text(
                      'EVENTIFY',
                      style: TextStyle(
                        fontSize: 12,
                        fontWeight: FontWeight.w900,
                        color: Color(0xFF3B82F6),
                        letterSpacing: 2,
                      ),
                    ),
                  ],
                ),
              ],
            ),
          ),
        ),
        const SizedBox(height: 16),
        ElevatedButton.icon(
          onPressed: _sharing ? null : _share,
          icon: _sharing
              ? const SizedBox(
                  width: 16,
                  height: 16,
                  child: CircularProgressIndicator(strokeWidth: 2, color: Colors.white),
                )
              : const Icon(Icons.share, size: 18),
          label: Text(_sharing ? 'Sharing...' : 'Share Rank Card'),
          style: ElevatedButton.styleFrom(
            backgroundColor: const Color(0xFF1D4ED8),
            foregroundColor: Colors.white,
            padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10)),
          ),
        ),
      ],
    );
  }

  Widget _stat(String label, String value) {
    return Column(
      mainAxisSize: MainAxisSize.min,
      children: [
        Text(
          value,
          style: const TextStyle(fontSize: 18, fontWeight: FontWeight.w800, color: Colors.white),
        ),
        const SizedBox(height: 2),
        Text(
          label,
          style: const TextStyle(fontSize: 11, color: Color(0xFF94A3B8)),
        ),
      ],
    );
  }
}