// update_dialog.dart — 「发现新版本」更新提示弹窗。
//
// 只做「展示 + 引导下载」:点「下载更新」用 url_launcher 打开对应平台的下载直链
// (浏览器下载),不做应用内静默安装/自动重启。force_update=true 时不可关闭
// (无「稍后」按钮、点遮罩/返回也关不掉)。
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';

import '../l10n/app_text.dart';
import '../pangolin_theme.dart';
import '../state/update_provider.dart';
import 'pangolin_icons.dart';

/// 展示更新弹窗。调用方(设置页「检查更新」)在拿到 `info.hasUpdate == true` 时调用。
Future<void> showUpdateDialog(BuildContext context, AppText t, AppUpdateInfo info) {
  return showDialog<void>(
    context: context,
    barrierDismissible: !info.forceUpdate,
    builder: (ctx) => PopScope(
      canPop: !info.forceUpdate,
      child: _UpdateDialog(t: t, info: info),
    ),
  );
}

class _UpdateDialog extends StatelessWidget {
  const _UpdateDialog({required this.t, required this.info});
  final AppText t;
  final AppUpdateInfo info;

  @override
  Widget build(BuildContext context) {
    final c = context.pangolin;
    return AlertDialog(
      backgroundColor: c.surface,
      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(PangolinRadius.xl)),
      title: Row(children: [
        Container(
          width: 34,
          height: 34,
          decoration: BoxDecoration(color: c.accentSubtle, shape: BoxShape.circle),
          child: Icon(PangolinIcons.zap, size: 18, color: c.accent),
        ),
        const SizedBox(width: 12),
        Expanded(
          child: Text(
            t.updateAvailableTitle(info.latestVersion),
            overflow: TextOverflow.ellipsis,
            style: PangolinText.body.copyWith(color: c.fg1, fontWeight: FontWeight.w700),
          ),
        ),
      ]),
      content: SingleChildScrollView(
        child: Text(
          info.releaseNotes.isEmpty ? t.updateNotesFallback : info.releaseNotes,
          style: PangolinText.sm.copyWith(color: c.fg2, height: 1.5),
        ),
      ),
      actions: [
        if (!info.forceUpdate)
          TextButton(
            onPressed: () => Navigator.of(context).pop(),
            child: Text(t.updateLater, style: PangolinText.sm.copyWith(color: c.fg2, fontWeight: FontWeight.w600)),
          ),
        TextButton(
          onPressed: () async {
            final url = platformDownloadUrl(info.downloadUrls);
            if (url != null && url.isNotEmpty) {
              final uri = Uri.parse(url);
              if (await canLaunchUrl(uri)) {
                await launchUrl(uri, mode: LaunchMode.externalApplication);
              }
            }
            if (context.mounted) Navigator.of(context).pop();
          },
          child: Text(t.updateDownload, style: PangolinText.sm.copyWith(color: c.accent, fontWeight: FontWeight.w700)),
        ),
      ],
    );
  }
}