import 'dart:io';
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:android_intent_plus/android_intent.dart';
import 'package:android_intent_plus/flag.dart';
import 'package:app_settings/app_settings.dart';

class AppLinksHelper {
  static Future<void> checkAndShowDialogOnce(BuildContext context) async {
    final prefs = await SharedPreferences.getInstance();
    final shown = prefs.getBool('supported_links_enabled') ?? false;

    if (!shown) {
      _showAppLinkDialog(context);
    }
  }

  static void _showAppLinkDialog(BuildContext context) {
    showDialog(
      context: context,
      builder: (_) => AlertDialog(
        title: const Text('Enable App Links'),
        content: Platform.isIOS
            ? const Text(
          'To ensure links like www.fcsc.com open directly in this app:\n\n'
              '1. Open iOS Settings.\n'
              '2. Scroll down and tap on "Your App Name".\n'
              '3. Make sure "Allow Universal Links" is enabled (if visible).\n\n'
              'Note: Some iOS versions do not show this explicitly.',
        )
            : const Text(
          'To enable links like www.fcsc.com to open in this app:\n\n'
              '1. Tap "Open Settings".\n'
              '2. Tap "Supported web addresses".\n'
              '3. Make sure your domain is enabled.\n\n'
              'This helps open links directly in the app.',
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.of(context).pop(),
            child: const Text('Later'),
          ),
          TextButton(
            onPressed: () async {
              Navigator.of(context).pop();

              if (Platform.isIOS) {
                AppSettings.openAppSettings();
              } else {
                _openAppLinkSettingsAndroid();
              }

              final prefs = await SharedPreferences.getInstance();
              await prefs.setBool('supported_links_enabled', true);
            },
            child: const Text('Open Settings'),
          ),
        ],
      ),
    );
  }

  static void _openAppLinkSettingsAndroid() {
    const packageName = 'ae.gov.fcsc.stats'; // 🔁 Replace with your app's package
    final intent = AndroidIntent(
      action: 'android.settings.APP_OPEN_BY_DEFAULT_SETTINGS',
      data: 'package:$packageName',
      flags: <int>[Flag.FLAG_ACTIVITY_NEW_TASK],
    );
    intent.launch();
  }
}