package com.sample.client;
 
import java.net.URL;
import java.net.URLEncoder;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.List;
import java.util.Map;
 
//sample:starting the Web resource client
public class SampleClient {
 
    public static void main(String[] args) {
        
        final String HOST = args[0];
        final String PORT = args[1];
        
        SampleClient sampleClient = new SampleClient();
        
        try{
            sampleClient.demonstration1(HOST, PORT);
            sampleClient.demonstration2(HOST, PORT);
            
            System.out.println("\n----- Successfully Ended -----");
            
        }catch(Exception e){
            //displaying a detailed exception message
            System.out.println(e.getMessage());
        }
    }
 
    private void demonstration1(String HOST, String PORT) {
 
        System.out.println("\n Demonstration 1 started.");
        System.out.println(" This demonstrates injection of " +
                "javax.ws.rs.core.Request instance " +
                "onto resource class field by using @Context.");
        
        URL url = null;
        HttpURLConnection httpConn = null;
 
        Map<String, List<String>> headers = null;
        List<String> status = null;
        String responseEntity = "";
        

        //calling the Web resource
        try {
            //setting the URI of the Web resource to be called
            url = new URL("http://" + HOST + ":" + PORT+ 
                    "/tutorial/root");
            //setting up the initial connection
            httpConn = (HttpURLConnection) url.openConnection();
            //setting the HTTP() method as "GET"
            httpConn.setRequestMethod("GET");
            //starting the connection
            httpConn.connect();
        }catch (MalformedURLException e) {
            System.out.println(" ERROR: " + e.getClass() + " was thrown. ");
            //displaying the stack trace
            e.printStackTrace();
            throw new RuntimeException(" Demonstration 1 failed.");
        }catch (IOException e) {
            System.out.println(" ERROR: " + e.getClass() + " was thrown. ");
            //displaying the stack trace
            e.printStackTrace();
            throw new RuntimeException(" Demonstration 1 failed.");
        }catch (Exception e) {
            System.out.println(" ERROR: " + e.getClass() + " was thrown. ");
            //displaying the stack trace
            e.printStackTrace();
            throw new RuntimeException(" Demonstration 1 failed.");
        }
 
        System.out.println(" The target URL is \"" + url + "\".");
        System.out.println(" The HTTP method  is " + "\"GET\"" + ".");
 
        try {
            //acquiring the HTTP response header
            headers = httpConn.getHeaderFields();
            //acquiring the HTTP status from the header
            status = headers.get(null);
            //acquiring the input stream reader and read HTTP response //entity body
            BufferedReader rd = new BufferedReader(new InputStreamReader(
                httpConn.getInputStream()));
            String line = "";
            while ((line = rd.readLine()) != null) {
                responseEntity += line;
            }
            //closing the input stream reader
            rd.close();
            //closing the connection
            httpConn.disconnect();
        }catch (Exception e) {
            System.out.println(" ERROR: " + e.getClass() + " was thrown. ");
            //displaying the stack trace
            e.printStackTrace();

            throw new RuntimeException(" Demonstration 1 failed.");
        }
        
        System.out.println(" Connection and interaction ended successfully.");
 
        //sets the expected value of the response status code and entity body
        String statusExpect = "[HTTP/1.1 200 OK]";
        String responseEntityExpect = "RequestMethod: GET";
        
        //checks whether the value of the status code and entity body is equal to the expected value
        if (status.toString().equals(statusExpect) 
                & responseEntity.equals(responseEntityExpect)) {
            //displaying the HTTP header
            System.out.println(" Response headers are " + headers.toString() + ".");
            //displaying the entity body
            System.out.println(" Response entity is " + responseEntity + ",");
            System.out.println(" which means target resource completed " +
                    "the process described above without any problem.");
            
            System.out.println(" Demonstration 1 ended successfully.");
        }else {
            System.out.println(" The response is not as expected.");
            throw new RuntimeException(" Demonstration 1 failed.");
        }
    
    private void demonstration2(String HOST, String PORT) {
 
        System.out.println("\n Demonstration 2 started.");
        System.out.println(" This demonstrates injection of QueryParam " +
                "onto resource bean setter method by using @QueryParam.");
 
        URL url = null;
        HttpURLConnection httpConn = null;
        String responseEntity = "";
        Map<String, List<String>> headers = null;
        List<String> status = null;
        
        //calling the Web resource
        try {
            //setting the URI of the Web resource to be called
            //assigning the query parameter to the URI
 
            url = new URL("http://" + HOST + ":" + PORT+ 
                    "/tutorial/root/getQueryParam?queryParam=queryValue");
            //setting up the initial connection
            httpConn = (HttpURLConnection) url.openConnection();
            //setting the HTTP() method as"GET"
            httpConn.setRequestMethod("GET");
            //starting the connection
            httpConn.connect();

        }catch (MalformedURLException e) {
            System.out.println(" ERROR: " + e.getClass() + " was thrown. ");
            //displaying the stack trace
            e.printStackTrace();
            throw new RuntimeException(" Demonstration 2 failed.");
        }catch (IOException e) {
            System.out.println(" ERROR: " + e.getClass() + " was thrown. ");
            //displaying the stack trace
            e.printStackTrace();
            throw new RuntimeException(" Demonstration 2 failed.");
        }catch (Exception e) {
            System.out.println(" ERROR: " + e.getClass() + " was thrown. ");
            //displaying the stack trace
            e.printStackTrace();
            throw new RuntimeException(" Demonstration 2 failed.");
        }
 
        System.out.println(" The target URL is \"" + url + "\".");
        System.out.println(" The HTTP method  is " + "\"GET\"" + ".");
        
        try {
            //acquiring the HTTP header
            headers = httpConn.getHeaderFields();
            //acquiring the HTTP status code from the HTTP header
            status = headers.get(null);
            //acquiring the input stream reader and reading the response //entity body of the HTTP response
            BufferedReader rd = new BufferedReader(new InputStreamReader(
                httpConn.getInputStream()));
            String line = "";
            while ((line = rd.readLine()) != null) {
                responseEntity += line;
            }
            //closing the input stream reader
            rd.close();
            //closing the connection
            httpConn.disconnect();
        }catch (Exception e) {
            System.out.println(" ERROR: " + e.getClass() + " was thrown. ");
            //displaying the stack trace
            e.printStackTrace();
            throw new RuntimeException(" Demonstration 2 failed.");
        }
        
        System.out.println(" Connection and interaction ended successfully.");
        
        //setting the expected value of the response status code and entity body
        String statusExpect = "[HTTP/1.1 200 OK]";
        String responseEntityExpect = "QueryParameter: queryValue";
        
        //checking whether the status code and entity body are same as the expected values
        if (status.toString().equals(statusExpect) 
                & responseEntity.equals(responseEntityExpect)) {
            //displaying the HTTP header
            System.out.println(" Response headers are " + headers.toString() + ".");
            //displaying the entity body
            System.out.println(" Response entity is " + responseEntity + ",");
            System.out.println(" which means target resource completed " +
                    "the process described above without any problem.");
            
            System.out.println(" Demonstration 2 ended successfully.");
        }else {
            System.out.println(" The response is not as expected.");
            throw new RuntimeException(" Demonstration 2 failed.");
        }
        
    }
    }
 
}