eatvio_app/lib/features/chat/presentation/pages/photo_view_screen.dart

import 'dart:io';

import 'package:cached_network_image/cached_network_image.dart';
import 'package:dismissible_page/dismissible_page.dart';
import 'package:eatvio_app/core/const.dart';
import 'package:eatvio_app/theme/app_decoration.dart';
import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:photo_view/photo_view.dart';
import 'package:photo_view/photo_view_gallery.dart';
import 'package:url_launcher/url_launcher.dart';

class PhotoViewScreen extends StatefulWidget {
  final List<String> imageUrls;
  final int index;
  final bool isLocal;

  const PhotoViewScreen({
    super.key,
    required this.imageUrls,
    required this.index,
    this.isLocal = false,
  });

  @override
  State<PhotoViewScreen> createState() => _PhotoViewScreenState();
}

class _PhotoViewScreenState extends State<PhotoViewScreen> {
  late final pageController;
  int imageIndex = 0;

  @override
  void initState() {
    imageIndex = widget.index;
    pageController = PageController(initialPage: imageIndex);
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return DismissiblePage(
      minScale: 1,
      onDismissed: () => GoRouter.of(context).pop(),
      direction: DismissiblePageDismissDirection.vertical,
      isFullScreen: true,
      child: PhotoViewGallery.builder(
        backgroundDecoration: BoxDecoration(
          color: Colors.transparent,
        ),
        scrollPhysics: const BouncingScrollPhysics(),
        builder: (BuildContext context, int index) {
          return PhotoViewGalleryPageOptions(
            imageProvider: widget.isLocal
                ? FileImage(
                    File(widget.imageUrls[index]),
                  ) as ImageProvider
                : CachedNetworkImageProvider(
                    widget.imageUrls[index],
                  ),
            initialScale: PhotoViewComputedScale.contained,
            minScale: PhotoViewComputedScale.contained,
            heroAttributes: PhotoViewHeroAttributes(
              tag: widget.imageUrls[index],
              transitionOnUserGestures: true,
            ),
            errorBuilder: (context, object, stackTrace) {
              return Scaffold(
                backgroundColor: Colors.black,
                body: SafeArea(
                  child: Column(
                    children: [
                      SizedBox(height: 32),
                      Text('Файл'),
                      SizedBox(height: 8),
                      ListTile(
                        shape: RoundedRectangleBorder(
                          borderRadius: BorderRadiusStyle.circleBorder17,
                        ),
                        contentPadding: EdgeInsets.all(16),
                        onTap: () async {
                          if (!await launchUrl(Uri.parse(widget.imageUrls[index]))) {
                            throw Exception('Could not launch ${widget.imageUrls[index]}');
                          }
                        },
                        leading: Icon(
                          Icons.file_copy_outlined,
                          color: Colors.white,
                        ),
                        trailing: Icon(
                          Icons.download_outlined,
                          color: Colors.white,
                        ),
                        title: Text(
                          widget.imageUrls[index].replaceAll(baseUrl + '/storage/' + 'chat_files/', ''),
                          style: TextStyle(
                            color: Colors.white,
                            fontSize: 12,
                          ),
                        ),
                      ),
                    ],
                  ),
                ),
              );
            },
          );
        },
        itemCount: widget.imageUrls.length,
        loadingBuilder: (context, event) => Center(
          child: Container(
            width: 20.0,
            height: 20.0,
            child: CircularProgressIndicator(
              value: event == null ? 0 : event.cumulativeBytesLoaded / event.expectedTotalBytes!,
            ),
          ),
        ),
        pageController: pageController,
        onPageChanged: (page) {
          setState(() {
            imageIndex = page;
          });
        },
      ),
    );
  }
}