import 'package:flutter/material.dart';

class FullScreenImageViewer extends StatefulWidget {
  final List<String> photoUrls;
  final int initialIndex;

  const FullScreenImageViewer({
    super.key,
    required this.photoUrls,
    required this.initialIndex,
  });

  @override
  State<FullScreenImageViewer> createState() => _FullScreenImageViewerState();
}

class _FullScreenImageViewerState extends State<FullScreenImageViewer> {
  late PageController _pageController;

  @override
  void initState() {
    super.initState();
    _pageController = PageController(initialPage: widget.initialIndex);
  }

  String _resolveImageUrl(String path) {
    if (path.startsWith('http://') || path.startsWith('https://')) return path;
    return 'https://sharing-api.sparkit.by/$path';
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.black,
      appBar: AppBar(
        backgroundColor: Colors.transparent,
        iconTheme: const IconThemeData(color: Colors.white),
      ),
      body: PageView.builder(
        controller: _pageController,
        itemCount: widget.photoUrls.length,
        itemBuilder: (context, index) {
          final photo = widget.photoUrls[index];
          final imageUrl = _resolveImageUrl(photo);
          return InteractiveViewer(
            child: Center(
              child: Image.network(
                imageUrl,
                fit: BoxFit.contain,
                errorBuilder: (context, error, stackTrace) {
                  return const Icon(Icons.error, color: Colors.white, size: 64);
                },
              ),
            ),
          );
        },
      ),
    );
  }
}