/// Widget: File Preview Item
///
/// Displays a file preview with icon, name, size, and remove button.
library;

import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
import 'package:worker/core/theme/colors.dart';

/// File Preview Item Widget
///
/// Shows uploaded file with:
/// - File type icon (PDF, image, etc.)
/// - File name
/// - File size
/// - Remove button
class FilePreviewItem extends StatelessWidget {
  const FilePreviewItem({
    super.key,
    required this.file,
    required this.onRemove,
  });

  final PlatformFile file;
  final VoidCallback onRemove;

  IconData _getFileIcon() {
    final extension = file.extension?.toLowerCase();
    if (extension == 'pdf') return Icons.picture_as_pdf;
    if (extension == 'jpg' || extension == 'jpeg' || extension == 'png') {
      return Icons.image;
    }
    return Icons.insert_drive_file;
  }

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

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

    return Container(
      margin: const EdgeInsets.only(bottom: 8),
      padding: const EdgeInsets.all(12),
      decoration: BoxDecoration(
        color: colorScheme.surfaceContainerHighest,
        borderRadius: BorderRadius.circular(8),
      ),
      child: Row(
        children: [
          Container(
            width: 40,
            height: 40,
            decoration: BoxDecoration(
              color: colorScheme.primary,
              borderRadius: BorderRadius.circular(6),
            ),
            child: Icon(_getFileIcon(), color: colorScheme.surface, size: 20),
          ),
          const SizedBox(width: 12),
          Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Text(
                  file.name,
                  style: TextStyle(
                    fontSize: 14,
                    fontWeight: FontWeight.w600,
                    color: colorScheme.onSurface,
                  ),
                  maxLines: 1,
                  overflow: TextOverflow.ellipsis,
                ),
                const SizedBox(height: 4),
                Text(
                  _formatFileSize(file.size),
                  style: TextStyle(
                    fontSize: 12,
                    color: colorScheme.onSurfaceVariant,
                  ),
                ),
              ],
            ),
          ),
          IconButton(
            icon: const Icon(Icons.close, size: 20),
            color: AppColors.danger,
            onPressed: onRemove,
            padding: EdgeInsets.zero,
            constraints: const BoxConstraints(minWidth: 24, minHeight: 24),
          ),
        ],
      ),
    );
  }
}