ThirdProgram

import org.json.JSONArray;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.ProtocolException;
import java.net.URL;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.format.DateTimeFormatter;
import java.util.*;
import java.util.stream.Collectors;

import static java.util.stream.Collectors.toMap;

public class ThirdStage {
    public static void main(String[] args) {
        System.out.println("Krsna");
        ThirdProgram();
    }

    private static void ThirdProgram() {
        try {
            Date dt = (new Date());
            URL restUrI = new URL("https://http-hunt.thoughtworks-labs.net/challenge/input");
            HttpURLConnection conn = (HttpURLConnection) restUrI.openConnection();
            try {
                conn.setRequestMethod("GET");
            } catch (ProtocolException e) {
                e.printStackTrace();
            }
            conn.setRequestProperty("userId", "A7HG3u8e_");
            conn.setRequestProperty("Accept", "application/json");


            JSONObject output = new JSONObject();
            JSONObject myrequest = null;

            myrequest = new JSONObject(new BufferedReader(new InputStreamReader(
                    (conn.getInputStream()))).readLine().toString());

            output.put("toolsSortedOnUsage",FindToolUsage(myrequest.getJSONArray("toolUsage")));
            JSONObject message = new JSONObject();
            message.put("output", output);
            System.out.println(message);
            URL url = new URL("https://http-hunt.thoughtworks-labs.net/challenge/output");
            conn = (HttpURLConnection) url.openConnection();
            conn.setDoOutput(true);
            conn.setRequestMethod("POST");
            conn.setRequestProperty("userId", "A7HG3u8e_");
            conn.setRequestProperty( "Content-Length", Integer.toString(output.toString().length() ));
            conn.setRequestProperty("Accept", "application/json");
            conn.setRequestProperty("content-type", "application/json");
            OutputStreamWriter wr= new OutputStreamWriter(conn.getOutputStream());
            wr.write(output.toString());
            wr.flush();
            Date dt2 = (new Date());
            System.out.println(dt2.getTime()-dt.getTime());
            System.out.println(conn.getResponseCode());
            if (conn.getResponseCode() != HttpURLConnection.HTTP_CREATED) {
                throw new RuntimeException("Failed : HTTP error code : "
                        + conn.getResponseCode());
            }

            BufferedReader br = new BufferedReader(new InputStreamReader(
                    (conn.getInputStream())));

            System.out.println("Output from Server .... \n");


            conn.disconnect();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static JSONArray FindToolUsage(JSONArray toolUsage) {
        Map<String, Integer> foundToolUsage = new HashMap<>();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-mm-dd hh:mm:ss");
        try {

            for(int i=0; i<toolUsage.length();i++){
                String toolName = (String) toolUsage.getJSONObject(i).getString("name");
                //System.out.println(toolName);
                int usage = (int)(format.parse(toolUsage.getJSONObject(i).getString("useEndTime")).getTime() - format.parse(toolUsage.getJSONObject(i).getString("useStartTime")).getTime());
                //System.out.println(usage);
                if(!foundToolUsage.containsKey(toolName)){
                    foundToolUsage.put(toolName,  (usage/(60*1000)));
                }else{
                    foundToolUsage.put(toolName, foundToolUsage.get(toolName)+usage/(60*1000));
                }
                //System.out.println(foundToolUsage.get(toolName));
            }

            final Map<String, Integer> sortedToolUsage = foundToolUsage.entrySet()
                    .stream()
                    .sorted(Collections.reverseOrder(Map.Entry.comparingByValue()))
                    .collect(
                            toMap(Map.Entry::getKey, Map.Entry::getValue, (e1, e2) -> e2,
                                    LinkedHashMap::new));
            //Map<String, String> mampSortedToolUsage = new HashMap<>();
            JSONArray jsonArray = new JSONArray();
            for(String s: sortedToolUsage.keySet()){
                JSONObject json = new JSONObject();
                json.put("name", s);
                json.put("timeUsedInMinutes", foundToolUsage.get(s));
                jsonArray.put(json);
            }
            System.out.println(jsonArray);
            return jsonArray;
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    public class ToolUsageClass{
        String name;
        int usage;


    }

}