import 'package:flutter/material.dart';

class NetworkOrAssetImage extends StatelessWidget {
  final String? imageUrl;
  final double width;
  final double? height;
  final BoxFit fit;
  final String placeholderAsset;

  const NetworkOrAssetImage({
    super.key,
    required this.imageUrl,
    this.width = 60.0,
    this.height,
    this.fit = BoxFit.cover,
    this.placeholderAsset = 'assets/images/avatar/default.png',
  });

  @override
  Widget build(BuildContext context) {
    final isNetwork = imageUrl != null && imageUrl!.isNotEmpty && (imageUrl!.startsWith('http://') || imageUrl!.startsWith('https://'));

    if (isNetwork) {
      return Image.network(
        imageUrl!,
        width: width,
        height: height,
        fit: fit,
        loadingBuilder: (context, child, loadingProgress) {
          if (loadingProgress == null) {
            return child;
          }
          // 显示占位
          return Image.asset(
            placeholderAsset,
            width: width,
            height: height,
            fit: fit,
          );
        },
        errorBuilder: (context, error, stackTrace) {
          return Image.asset(
            placeholderAsset,
            width: width,
            height: height,
            fit: fit,
          );
        },
      );
    } else {
      return Image.asset(
        (imageUrl != null && imageUrl!.isNotEmpty) ? imageUrl! : placeholderAsset,
        width: width,
        height: height,
        fit: fit,
      );
    }
  }
}