import 'dart:io';

import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:kooltab2/utils/app_update_util.dart';

import 'app_config.dart';

class UpdateChecker {
  static bool _hasChecked = false;

  static Future<void> check(BuildContext context) async {
    if (!Platform.isAndroid) return;
    if (_hasChecked) {
      debugPrint("Update already checked this boot");
      return;
    }

    _hasChecked = true;

    final updater = AppUpdateUtil(serverUrl: kUpdateServerUrl);

    try {
      final update = await updater.checkForUpdate();

      if (update == null) {
        debugPrint("No update available");
        return;
      }

      debugPrint("Update available: ${update.version}");

      if (!context.mounted) return;

      _showUpdateDialog(context, update);
    } catch (e) {
      debugPrint("Update check failed: $e");
    }
  }

  static void _showUpdateDialog(BuildContext context, UpdateInfo update) {
    showDialog(
      context: context,
      barrierDismissible: !update.mandatory,
      builder: (dialogContext) => AlertDialog(
        title: const Text("Update available"),
        content: Column(
          mainAxisSize: MainAxisSize.min,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text("Version ${update.version} is available."),
            const SizedBox(height: 12),
            Text(update.notes),
          ],
        ),
        actions: [
          if (!update.mandatory)
            TextButton(
              onPressed: () => Navigator.pop(dialogContext),
              child: const Text("Later"),
            ),
          FilledButton(
            onPressed: () {
              Navigator.pop(dialogContext);
              context.push('/update-progress', extra: update);
            },
            child: const Text("Update"),
          ),
        ],
      ),
    );
  }
}