import 'package:flutter/material.dart';

import '../../app/app_version.dart';
import '../../services/app_update_service.dart';

Future<void> showUpdatePrompt(
  BuildContext context,
  AppRelease release, {
  UpdateDownloadOpener openDownload = openUpdateInBrowser,
}) async {
  final confirmed = await showDialog<bool>(
    context: context,
    builder: (context) => AlertDialog(
      title: Text('发现新版本 ${release.version}'),
      content: SizedBox(
        width: 360,
        child: SingleChildScrollView(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.start,
            children: [
              const Text('当前版本 $appVersion', style: TextStyle(fontSize: 12)),
              const SizedBox(height: 16),
              Text(release.notes, style: const TextStyle(height: 1.6)),
              const SizedBox(height: 16),
              const Text(
                '将打开浏览器下载，安装时请保留现有应用和课表。',
                style: TextStyle(fontSize: 12),
              ),
            ],
          ),
        ),
      ),
      actions: [
        TextButton(
          onPressed: () => Navigator.pop(context, false),
          child: const Text('稍后'),
        ),
        FilledButton(
          onPressed: () => Navigator.pop(context, true),
          child: const Text('立即更新'),
        ),
      ],
    ),
  );
  if (confirmed != true || !context.mounted) return;
  bool opened;
  try {
    opened = await openDownload(release.downloadUri);
  } catch (_) {
    opened = false;
  }
  if (!opened && context.mounted) {
    await showDialog<void>(
      context: context,
      builder: (context) => AlertDialog(
        title: const Text('未能打开浏览器'),
        content: SingleChildScrollView(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: [
              const Text('可以复制下方链接到浏览器下载：'),
              const SizedBox(height: 12),
              SelectableText(release.downloadUri.toString()),
            ],
          ),
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(context),
            child: const Text('知道了'),
          ),
        ],
      ),
    );
  }
}