///necessary data for the post method

/// this is the token from firebase
 private String serverkey = "key=AAAAa0iy3a8:APA91bG4y2nlRXfTsK0F2Hji2xdIIzboWWB49-TAGQnoHtYekhhSOPqOGy_qipXEwL-
  Ps0smPhzEB1GaZDvXq4McJLZtIfXHRYptErL0Nn7grjB_nv-zkXC0yzMWO6hh2IE5q_i5Ct9O";

     ////this is the url to make the post to
    private String serverUrl = "https://fcm.googleapis.com/fcm/send";

 private void getDetails() {

        requestQueue = VolleySingleton.getInstance(this).getRequestQueue();

        final String api = "https://www.thesportsdb.com/api/v1/json/4013070/latestsoccer.php";

        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.GET, api, null, response -> {
            try {
                JSONObject jsonObjects = response.getJSONObject("teams");
                JSONArray jsonArray = jsonObjects.getJSONArray("Match");
                for (int i = 0; i < jsonArray.length(); i++) {
                    JSONObject jsonObject = jsonArray.getJSONObject(i);
                    String league = jsonObject.getString("League");
                    if (league.equals("Brasileirão Série B")) {

                        /// this is the data that i should post and then retreive to pass the notification
                        String datetime = jsonObject.getString("Date");
                        String hometeam = jsonObject.getString("HomeTeam");
                        String awayteam = jsonObject.getString("AwayTeam");
                        String time = jsonObject.getString("Time");
                        String date = datetime.substring(0, 10);

                        //// subsribe users to a topic
                        FirebaseMessaging.getInstance().subscribeToTopic("sport");
                        //// making a post request
                        JsonObjectRequest jsonObjectRequest1 = new JsonObjectRequest(Request.Method.POST, serverUrl, null, response1 -> {

                            OkHttpClient okHttpClient = new OkHttpClient();
                            JSONObject jsonObject0 = new JSONObject();
                            JSONObject jsonObject1 = new JSONObject();
                            try {
                                //// the data to post ( date , hometeam,awayteam,time)
                                jsonObject1.put("date",date);
                                jsonObject1.put("hometeam",hometeam);
                                jsonObject1.put("awayteam",awayteam);
                                jsonObject1.put("time",time);

                                ///// parsing content type
                                MediaType mediaType = MediaType.parse("application/json");

                                ////setting up the request body which has ( header , authentication key ...)
                                RequestBody requestBody  = RequestBody.create(mediaType,jsonObject0.toString());
                                okhttp3.Request request = new okhttp3.Request.Builder()
                                        .header("Authorization",serverkey)
                                        .url("https://fcm.googleapis.com/fcm/send")
                                        .post(requestBody)
                                        .build();
                                ///// here is the response
                                okhttp3.Response okresponse = null;
                                try {
                                    okresponse = okHttpClient.newCall(request).execute();
                                    String finalResponse = Objects.requireNonNull(okresponse.body()).string();
                                    Log.d("TODO","final response " + finalResponse);
                                } catch (IOException e) {
                                    e.printStackTrace();
                                }

                            } catch (JSONException e) {
                                e.printStackTrace();
                            }
                        }, new Response.ErrorListener() {
                            @Override
                            public void onErrorResponse(VolleyError error) {

                            }
                        });
                        requestQueue.add(jsonObjectRequest1);
                    }

                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

        }, error -> {

        });

        requestQueue.add(jsonObjectRequest);
    }