class Subscribe extends StatefulWidget {
  final User user;

  Subscribe({this.user});

  @override
  _SubscribeState createState() => _SubscribeState();
}

class _SubscribeState extends State<Subscribe> {
  bool showSpinner = true;
  InAppPurchaseConnection _iap = InAppPurchaseConnection.instance;
  bool _available = true;
  List<ProductDetails> _products = [];
  List<PurchaseDetails> _purchases = [];
  StreamSubscription _subscription;
  String storeID = 'chromaticStoreID';

  // Get available products (our monthly subscription)
  Future<void> _getProducts() async {
    Set<String> ids = <String>[storeID].toSet();
    ProductDetailsResponse response = await _iap.queryProductDetails(ids);
    print('Products Available: ${response.productDetails}');

    setState(() {
      _products = response.productDetails;
    });
  }

  // Get past purchase for restoring if already purchased
  Future<void> _getPastPurchases() async {
    QueryPurchaseDetailsResponse response = await _iap.queryPastPurchases();
    print('Past Purchase: ${response.pastPurchases}');

    for (PurchaseDetails purchase in response.pastPurchases) {
      if (Platform.isIOS) {
        _iap.completePurchase(purchase);
      }
    }
    setState(() {
      showSpinner = false;
      _purchases = response.pastPurchases;
    });
  }

  // Initialize the In app purchase module by loading products available and past purchases plus listening for any purchases
  void _iapInitialize() async {
    _available = await _iap.isAvailable();
    print('Available? -> $_available');

    if (_available) {
      await _getProducts();
      await _getPastPurchases();

      _verifyPurchase();

      _subscription = _iap.purchaseUpdatedStream.listen((data) => setState(() {
            print('New Purchase: $data');
            _purchases.addAll(data);
            _verifyPurchase();
          }));
    }
  }

  @override
  void initState() {
    super.initState();
    _iapInitialize();
  }

[  +17 ms] I/flutter (11387): Firebase login success!
[   +3 ms] I/flutter (11387): Removing User Cache from DB
[  +18 ms] I/flutter (11387): Not a Subscriber
[  +56 ms] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): Failed to handle method call
[        ] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): java.lang.IllegalArgumentException:
Support for pending purchases must be enabled. Enable this by calling 'enablePendingPurchases()' on
BillingClientBuilder.
[   +1 ms] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
com.android.billingclient.api.BillingClient$Builder.build(BillingClient.java:309)
[        ] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
io.flutter.plugins.inapppurchase.InAppPurchasePlugin.buildBillingClient(InAppPurchasePlugin.java:278)
[        ] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
io.flutter.plugins.inapppurchase.InAppPurchasePlugin.startConnection(InAppPurchasePlugin.java:126)
[   +1 ms] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
io.flutter.plugins.inapppurchase.InAppPurchasePlugin.onMethodCall(InAppPurchasePlugin.java:89)
[   +1 ms] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:222)
[   +8 ms] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:96)
[        ] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:643)
[        ] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
android.os.MessageQueue.nativePollOnce(Native Method)
[        ] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
android.os.MessageQueue.next(MessageQueue.java:325)
[   +3 ms] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
android.os.Looper.loop(Looper.java:142)
[   +1 ms] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
android.app.ActivityThread.main(ActivityThread.java:6944)
[   +4 ms] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
java.lang.reflect.Method.invoke(Native Method)
[   +1 ms] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
[   +1 ms] E/MethodChannel#plugins.flutter.io/in_app_purchase(11387): 	at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)


 info • Unused import: 'package:flare_flutter/flare_actor.dart' •
          lib/components/broadcastTile.dart:12:8 • unused_import
   info • The value of the local variable 'playState' isn't used •
          lib/components/broadcastTile.dart:71:10 • unused_local_variable
   info • Unused import: 'package:listener/views/localNotification.dart' •
          lib/components/message.dart:5:8 • unused_import
   info • The value of the local variable 'playState' isn't used •
          lib/components/savedTile.dart:53:10 • unused_local_variable
   info • Unused import: 'package:flare_flutter/flare_actor.dart' • lib/views/homepage.dart:22:8
          • unused_import
   info • This function has a return type of 'FutureOr<User>', but doesn't end with a return
          statement • lib/views/login.dart:181:51 • missing_return
   info • This function has a return type of 'FutureOr<FirebaseUser>', but doesn't end with a
          return statement • lib/views/login.dart:186:51 • missing_return
   info • The member 'positions' can only be used within instance members of subclasses of
          'package:flutter/src/widgets/scroll_controller.dart' • lib/views/savedSongs.dart:96:27
          • invalid_use_of_protected_member

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.7.8+hotfix.4, on Mac OS X 10.14.5 18F132, locale en-US)
 
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] Xcode - develop for iOS and macOS (Xcode 10.3)
[✓] iOS tools - develop for iOS devices
[✓] Android Studio (version 3.4)
[✓] VS Code (version 1.36.1)
[✓] Connected device (1 available)

• No issues found!