import 'dart:typed_data';

import 'package:flutter/material.dart';
import 'package:share_plus/share_plus.dart';
import 'package:path_provider/path_provider.dart';
import 'dart:io';

/// Full-screen zoomable image viewer with share and close controls.
class ImageViewer extends StatelessWidget {
  final Uint8List imageBytes;

  const ImageViewer({super.key, required this.imageBytes});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.black,
      body: SafeArea(
        child: Stack(
          children: [
            // Zoomable image
            Center(
              child: InteractiveViewer(
                minScale: 1.0,
                maxScale: 5.0,
                child: Image.memory(
                  imageBytes,
                  fit: BoxFit.contain,
                ),
              ),
            ),
            // Top bar with actions
            Positioned(
              top: 0,
              left: 0,
              right: 0,
              child: Container(
                padding:
                    const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
                decoration: BoxDecoration(
                  gradient: LinearGradient(
                    begin: Alignment.topCenter,
                    end: Alignment.bottomCenter,
                    colors: [
                      Colors.black.withAlpha(180),
                      Colors.transparent,
                    ],
                  ),
                ),
                child: Row(
                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
                  children: [
                    IconButton(
                      icon: const Icon(Icons.close, color: Colors.white),
                      onPressed: () => Navigator.pop(context),
                    ),
                    Row(
                      children: [
                        IconButton(
                          icon: const Icon(Icons.share, color: Colors.white),
                          onPressed: () => _share(context),
                        ),
                      ],
                    ),
                  ],
                ),
              ),
            ),
          ],
        ),
      ),
    );
  }

  Future<void> _share(BuildContext context) async {
    try {
      final dir = await getTemporaryDirectory();
      final file = File(
          '${dir.path}/pailot_image_${DateTime.now().millisecondsSinceEpoch}.png');
      await file.writeAsBytes(imageBytes);
      await SharePlus.instance.share(
        ShareParams(files: [XFile(file.path)]),
      );
    } catch (e) {
      if (context.mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Share failed: $e')),
        );
      }
    }
  }
}