import 'package:flutter/material.dart';
import 'package:cached_network_image/cached_network_image.dart';

class TierAvatarRing extends StatelessWidget {
  final String username;
  final String tier;
  final double size;
  final bool showDiceBear;
  final String? imageUrl;
  final VoidCallback? onTap;

  static const Map<String, Color> _tierColors = {
    'Bronze': Color(0xFFFED7AA),
    'Silver': Color(0xFFE2E8F0),
    'Gold': Color(0xFFFEF3C7),
    'Platinum': Color(0xFFEDE9FE),
    'Diamond': Color(0xFFE0E7FF),
  };

  static const Color _fallbackColor = Color(0xFF475569);

  const TierAvatarRing({
    super.key,
    required this.username,
    required this.tier,
    this.size = 48.0,
    this.showDiceBear = true,
    this.imageUrl,
    this.onTap,
  });

  Color get _ringColor => _tierColors[tier] ?? _fallbackColor;

  String get _avatarUrl {
    if (imageUrl != null && imageUrl!.isNotEmpty) {
      return imageUrl!;
    }
    return 'https://api.dicebear.com/9.x/notionists/svg?seed=$username';
  }

  Widget _buildAvatar() {
    final double radius = size / 2 - 5;

    if (!showDiceBear) {
      return CircleAvatar(
        radius: radius,
        backgroundColor: const Color(0xFF1E293B),
        child: Icon(
          Icons.person,
          color: Colors.white54,
          size: size * 0.5,
        ),
      );
    }

    return CachedNetworkImage(
      imageUrl: _avatarUrl,
      memCacheWidth: (size * 2).round(),
      memCacheHeight: (size * 2).round(),
      maxWidthDiskCache: (size * 4).round(),
      maxHeightDiskCache: (size * 4).round(),
      imageBuilder: (context, imageProvider) => CircleAvatar(
        radius: radius,
        backgroundImage: imageProvider,
      ),
      placeholder: (context, url) => CircleAvatar(
        radius: radius,
        backgroundColor: const Color(0xFF1E293B),
        child: SizedBox(
          width: size * 0.4,
          height: size * 0.4,
          child: const CircularProgressIndicator(
            strokeWidth: 2,
            color: Colors.white38,
          ),
        ),
      ),
      errorWidget: (context, url, error) => CircleAvatar(
        radius: radius,
        backgroundColor: const Color(0xFF1E293B),
        child: Icon(
          Icons.person,
          color: Colors.white54,
          size: size * 0.5,
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    final Color ringColor = _ringColor;
    final double containerSize = size + 6;

    final Widget ring = Container(
      width: containerSize,
      height: containerSize,
      decoration: BoxDecoration(
        shape: BoxShape.circle,
        border: Border.all(color: ringColor, width: 3),
        boxShadow: [
          BoxShadow(
            color: ringColor.withOpacity(0.4),
            blurRadius: 8,
            spreadRadius: 1,
          ),
        ],
      ),
      child: Center(child: _buildAvatar()),
    );

    if (onTap != null) {
      return GestureDetector(
        onTap: onTap,
        child: ring,
      );
    }

    return ring;
  }
}