import 'package:flutter/material.dart';

import '../../core/models/address.dart';

/// 附件展示 chip
class AttachmentChip extends StatelessWidget {
  final MailAttachment attachment;
  final VoidCallback onTap; // 打开/保存
  final VoidCallback? onRemove;

  const AttachmentChip({
    super.key,
    required this.attachment,
    required this.onTap,
    this.onRemove,
  });

  @override
  Widget build(BuildContext context) {
    final scheme = Theme.of(context).colorScheme;
    final icon = _iconFor(attachment.fileName);
    return InputChip(
      avatar: Icon(icon, size: 18, color: scheme.primary),
      label: Text(
        attachment.fileName,
        overflow: TextOverflow.ellipsis,
        style: const TextStyle(fontSize: 12.5),
      ),
      tooltip: '${attachment.fileName} (${_size(attachment.size)})',
      onPressed: onTap,
      onDeleted: onRemove,
      deleteIcon: onRemove == null ? null : const Icon(Icons.close, size: 15),
      visualDensity: VisualDensity.compact,
    );
  }

  IconData _iconFor(String name) {
    final lower = name.toLowerCase();
    if (lower.endsWith('.pdf')) return Icons.picture_as_pdf_outlined;
    if (lower.endsWith('.doc') || lower.endsWith('.docx')) return Icons.description_outlined;
    if (lower.endsWith('.xls') || lower.endsWith('.xlsx') || lower.endsWith('.csv')) {
      return Icons.table_chart_outlined;
    }
    if (lower.endsWith('.ppt') || lower.endsWith('.pptx')) return Icons.slideshow_outlined;
    if (lower.endsWith('.zip') || lower.endsWith('.rar') || lower.endsWith('.7z')) {
      return Icons.folder_zip_outlined;
    }
    if (lower.endsWith('.png') ||
        lower.endsWith('.jpg') ||
        lower.endsWith('.jpeg') ||
        lower.endsWith('.gif') ||
        lower.endsWith('.webp') ||
        lower.endsWith('.bmp')) {
      return Icons.image_outlined;
    }
    if (lower.endsWith('.mp3') || lower.endsWith('.wav') || lower.endsWith('.flac')) {
      return Icons.music_note_outlined;
    }
    if (lower.endsWith('.mp4') || lower.endsWith('.mov') || lower.endsWith('.avi')) {
      return Icons.movie_outlined;
    }
    return Icons.insert_drive_file_outlined;
  }

  static String _size(int bytes) {
    if (bytes < 1024) return '$bytes B';
    if (bytes < 1024 * 1024) return '${(bytes / 1024).toStringAsFixed(1)} KB';
    return '${(bytes / 1048576).toStringAsFixed(1)} MB';
  }
}