package packages.webservice.service_handler;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;

/**
 * Created by Kenneth on 21/2/2017.
 */

public class RequestHandler {

    public String sendPostRequest(String requestUrl, HashMap<String, String> postDataParams) {
        URL url;
        StringBuilder stringBuilder = new StringBuilder();

        try {
            url = new URL(requestUrl);

            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setReadTimeout(15000);
            connection.setConnectTimeout(15000);
            connection.setRequestMethod("POST");
            connection.setDoInput(true);
            connection.setDoOutput(true);

            OutputStream os = connection.getOutputStream();
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
            writer.write(getPostDataString(postDataParams));

            writer.flush();
            writer.close();
            os.close();

            int responseCode = connection.getResponseCode();
            if (responseCode == HttpURLConnection.HTTP_OK) {
                BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));

                stringBuilder = new StringBuilder();
                String response = null;

                while ((response = br.readLine()) != null) {
                    stringBuilder.append(response);

                }

            }

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

        }

        return stringBuilder.toString();

    }

    public String sendGetRequest(String requestUrl) {
        StringBuilder stringBuilder = new StringBuilder();

        try {
            URL url = new URL(requestUrl);

            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));

            String s = null;
            while ((s = bufferedReader.readLine()) != null) {
                stringBuilder.append(s + "\n");

            }

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

        }

        return stringBuilder.toString();

    }

    public String sendGetRequestParam(String requestUrl, String id) {
        StringBuilder stringBuilder = new StringBuilder();

        try {
            URL url = new URL(requestUrl + id);

            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));

            String s;
            while ((s = bufferedReader.readLine()) != null) {
                stringBuilder.append(s + "\n");

            }

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

        }

        return stringBuilder.toString();

    }

    private String getPostDataString(HashMap<String, String> params) throws UnsupportedEncodingException {
        StringBuilder result = new StringBuilder();

        boolean first = true;
        for (Map.Entry<String, String> entry : params.entrySet()) {
            if (first) {
                first = false;

            }
            else {
                result.append("&");

            }

            result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
            result.append("=");
            result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));

        }

        return result.toString();

    }

}