import 'package:flutter/material.dart';

/// 圓形頭像組件
///
/// 顯示用戶首字母或默認比特幣符號。通過 [radius] 控制大小，
/// [fontSize] 控制文字大小，[text] 可傳入用戶頭像文字。
class AvatarCircle extends StatelessWidget {
  final double radius;
  final double fontSize;
  final String? text;

  const AvatarCircle({
    super.key,
    required this.radius,
    required this.fontSize,
    this.text,
  });

  @override
  Widget build(BuildContext context) {
    final colorScheme = Theme.of(context).colorScheme;

    return CircleAvatar(
      radius: radius,
      backgroundColor: colorScheme.primary.withOpacity(0.15),
      child: Text(
        text ?? '₿',
        style: TextStyle(
          fontSize: fontSize,
          color: colorScheme.primary,
          fontWeight: FontWeight.w700,
        ),
      ),
    );
  }
}