public class JsonGetData extends AsyncTask<Void,Void,String> {
    private TextView texter;
    private Context context;
    private ListView listview;
    private ArrayList<Departure>departureList;
    private String ide;

    public JsonGetData(TextView textv, Context c,ListView l, String id) {
        texter = textv;
        context = c;
        listview = l;
        departureList = new ArrayList<>();
        ide = id;


    }
    @Override
    protected String doInBackground(Void... params) {
        HttpURLConnection connection = null;
        BufferedReader reader = null;
        String URL = getURL(ide);
        try {
            URL url = new URL(URL);
            connection = (HttpURLConnection) url.openConnection();
            connection.connect();

            InputStream stream = connection.getInputStream();
            reader = new BufferedReader(new InputStreamReader(stream));
            StringBuffer buffer = new StringBuffer();
            String line = "";
            while((line = reader.readLine()) != null){
                buffer.append(line);
            }
            String finalJson = buffer.toString();
            JSONObject parentObject = new JSONObject(finalJson);
            JSONArray parentArray;
            JSONObject object = parentObject.getJSONObject("DepartureBoard");
            String serverTime = object.getString("servertime");
            parentArray = object.getJSONArray("Departure");
            JSONObject oneTime = parentArray.getJSONObject(0);
            String busStop = oneTime.getString("stop");

            for (int i = 0 ; i<parentArray.length(); i++) {
                Departure departure = new Departure();
                JSONObject jRealObject = parentArray.getJSONObject(i);

                departure.setDestination(jRealObject.getString("direction"));
                departure.setTimeLeft(getTime(serverTime, jRealObject.getString("rtTime")));
                departure.setRtTime(jRealObject.getString("rtTime"));
                departure.setvNumber(jRealObject.getString("sname"));
                departure.setBgColor(jRealObject.getString("fgColor"));
                departure.setTxColor(jRealObject.getString("bgColor"));
                departure.setPosition(jRealObject.getString("track"));

                departureList.add(departure);
            }
            Collections.sort(departureList, new Comparator<Departure>() {
                @Override
                public int compare(Departure lhs, Departure rhs) {
                    return lhs.getTimeLeft().compareTo(rhs.getTimeLeft());
                }
            });
            return busStop;


        }
        catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (JSONException e) {
            e.printStackTrace();
        } catch (ParseException e) {
            e.printStackTrace();
        } finally{
            if(connection != null) {
                connection.disconnect();
            }
            try {
                if(reader!=null){
                    reader.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
        return null;
    }

    @Override
    protected void onPostExecute(String result) {
        super.onPostExecute(result);

        DepartureAdapter adapter = new DepartureAdapter(context, R.layout.custom_row_2,departureList);
        listview.setAdapter(adapter);
        texter.setText(result);

    }



    public String getTime(String serverTime, String rtTime) throws ParseException {

        SimpleDateFormat format = new SimpleDateFormat("HH:mm");
        Date srvTime = format.parse(serverTime);
        Date rTime = format.parse(rtTime);
        long difference = rTime.getTime() - srvTime.getTime();
        if(difference == 0){
            return "Nu";
        }else {
            long diffMin = difference / (60 * 1000) % 60;
            return "" + diffMin + "min";
        }

    }

    private String getURL(String id){
        String key="8ac536c3-8ba4-46b0-9f3f-dfda1d57e48d";
        String ide=id;
        String URL;
        URL ="http://api.vasttrafik.se/bin/rest.exe/v1/departureBoard?authKey="+key+"&format=json&jsonCallback=processJSON&id="+ide+"&timeSpan=8";
        return URL;
    }

}