import 'package:flutter/material.dart';
import 'package:flutter_webview_plugin/flutter_webview_plugin.dart';

class PaymentView extends StatefulWidget {
  final String selectedUrl;

  PaymentView({this.selectedUrl});

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

class _PaymentViewState extends State<PaymentView> {
  final flutterWebviewPlugin = new FlutterWebviewPlugin();

  @override
  void initState() {
    super.initState();
    flutterWebviewPlugin.onBack.listen((event) {
      Navigator.pop(context);
    });
    flutterWebviewPlugin.onUrlChanged.listen((String url) {
      print(url);
      if (url.contains("#access_token")) {
        succeed(url);
      }

      if (url.contains(
          "https://www.facebook.com/connect/login_success.html?error=access_denied&error_code=200&error_description=Permissions+error&error_reason=user_denied")) {
        denied();
      }
      if (url.contains("https://expresspaygh.com/retry_later.php")) {
        denied();
      }
    });
  }

  denied() {
    Navigator.pop(context);
  }

  succeed(String url) {
    var params = url.split("access_token=");

    var endparam = params[1].split("&");
    flutterWebviewPlugin.clearCache();
    flutterWebviewPlugin.cleanCookies();
    flutterWebviewPlugin.dispose();
    Navigator.pop(context, endparam[0]);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        height: MediaQuery.of(context).size.height,
        margin: EdgeInsets.only(top: 10),
        child: WebviewScaffold(
          url: widget.selectedUrl,
          scrollBar: true,
        ),
      ),
    );
  }
}