package org.onap.vid.policy;

import org.apache.commons.codec.binary.Base64;
import org.eclipse.jetty.util.security.Password;
import org.json.simple.JSONObject;
import org.onap.vid.client.HttpBasicClient;
import org.onap.vid.exceptions.GenericUncheckedException;
import org.onap.vid.policy.rest.RequestDetails;
import org.onap.portalsdk.core.logging.logic.EELFLoggerDelegate;
import org.onap.portalsdk.core.util.SystemProperties;

import javax.ws.rs.client.Client;
import javax.ws.rs.client.Entity;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedHashMap;
import javax.ws.rs.core.Response;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Collections;
import java.util.Date;

public class PolicyRestInterface extends PolicyRestInt implements PolicyRestInterfaceIfc {

	/** The logger. */
	private static final EELFLoggerDelegate logger = EELFLoggerDelegate.getLogger(PolicyRestInterface.class);
	
	public static final String APPLICATION_JSON = "application/json";

	/** The client. */
	private static Client client = null;

	/** The common headers. */
	private MultivaluedHashMap<String, Object> commonHeaders;
	public PolicyRestInterface() {
		super();
	}

	/** The Constant dateFormat. */
	static final DateFormat dateFormat = new SimpleDateFormat("HH:mm:ss:SSSS");

	public void initRestClient()
	{
		final String methodname = "initRestClient()";
		
		final String mechId = SystemProperties.getProperty(PolicyProperties.POLICY_CLIENT_MECHID_VAL);
		final String clientPassword = SystemProperties.getProperty(PolicyProperties.POLICY_CLIENT_PASSWORD_VAL);
		final String username = SystemProperties.getProperty(PolicyProperties.POLICY_USERNAME_VAL);
		final String password = SystemProperties.getProperty(PolicyProperties.POLICY_PASSWORD_VAL);
		final String environment = SystemProperties.getProperty(PolicyProperties.POLICY_ENVIRONMENT_VAL);
				
		final String decrypted_client_password = Password.deobfuscate(clientPassword);		
		String mechAuthString = mechId + ":" + decrypted_client_password;		
		byte[] mechAuthEncBytes = Base64.encodeBase64(mechAuthString.getBytes());
		String clientAuth = new String(mechAuthEncBytes);
		
		final String decrypted_password = Password.deobfuscate(password);		
		String authString = username + ":" + decrypted_password;		
		byte[] authEncBytes = Base64.encodeBase64(authString.getBytes());
		String authorization = new String(authEncBytes);
		
		commonHeaders = new MultivaluedHashMap<> ();
		commonHeaders.put("ClientAuth",  Collections.singletonList((Object) ("Basic " + clientAuth)));
		commonHeaders.put("Authorization",  Collections.singletonList((Object) ("Basic " + authorization)));
		commonHeaders.put("Environment",  Collections.singletonList((Object) (environment)));
		
		if (client == null) {
			
			try {
				client = HttpBasicClient.getClient();
			} catch (Exception e) {
				System.out.println(  methodname + " Unable to get the SSL client");
			}
		}
	}
	
	@SuppressWarnings("unchecked")
	public <T> void  Get (T t, String sourceId, String path, RestObject<T> restObject ) {
		String methodName = "Get";
		
		logger.debug(EELFLoggerDelegate.debugLogger, methodName + " start");
		
		String url="";
		restObject.set(t);
		
		url = SystemProperties.getProperty(PolicyProperties.POLICY_SERVER_URL_VAL) + path;
        logger.debug(EELFLoggerDelegate.debugLogger, dateFormat.format(new Date()) + "<== " +  methodName + " sending request to url= " + url);
		
        initRestClient();
		
		final Response cres = client.target(url)
			 .request()
	         .accept(APPLICATION_JSON)
	         .headers(commonHeaders)
	         .get();
		
		int status = cres.getStatus();
		restObject.setStatusCode (status);
		
		if (status == 200) {
			 t = (T) cres.readEntity(t.getClass());
			 restObject.set(t);
			 logger.debug(EELFLoggerDelegate.debugLogger, dateFormat.format(new Date()) + methodName + " REST api was successfull!");
		    
		 } else {
		     throw new GenericUncheckedException(methodName + " with status="+ status + ", url= " + url );
		 }

		logger.debug(EELFLoggerDelegate.debugLogger,methodName + " received status=" + status );
		
		return;
	}
   
   @SuppressWarnings("unchecked")
   	public <T> void Delete(T t, RequestDetails r, String sourceID, String path, RestObject<T> restObject) {
	 
		String methodName = "Delete";
		String url="";
		Response cres = null;
		
		logger.debug(EELFLoggerDelegate.debugLogger,dateFormat.format(new Date()) + "<== " +  methodName + " start");
		logRequest (r);

		try {
			initRestClient();
			
			url = SystemProperties.getProperty(PolicyProperties.POLICY_SERVER_URL_VAL) + path;
			logger.debug(EELFLoggerDelegate.debugLogger,dateFormat.format(new Date()) + " methodName sending request to: " + url);
	
			cres = client.target(url)
					 .request()
			         .accept(APPLICATION_JSON)
	        		 .headers(commonHeaders)
			         //.entity(r)
			         .build("DELETE", Entity.entity(r, MediaType.APPLICATION_JSON)).invoke();

			int status = cres.getStatus();
	    	restObject.setStatusCode (status);
	    	
			if (status == 404) { // resource not found
				String msg = "Resource does not exist...: " + cres.getStatus();
				logger.debug(EELFLoggerDelegate.debugLogger,dateFormat.format(new Date()) + "<== " + msg);
			} else if (status == 200  || status == 204){
				logger.debug(EELFLoggerDelegate.debugLogger,dateFormat.format(new Date()) + "<== " + "Resource " + url + " deleted");
			} else if (status == 202) {
				String msg = "Delete in progress: " + status;
				logger.debug(EELFLoggerDelegate.debugLogger,dateFormat.format(new Date()) + "<== " + msg);
			}
			else {
				String msg = "Deleting Resource failed: " + status;
					logger.debug(EELFLoggerDelegate.debugLogger,dateFormat.format(new Date()) + "<== " + msg);
			}
			
			try {
	   			t = (T) cres.readEntity(t.getClass());
	   			restObject.set(t);
            }
            catch ( Exception e ) {
            	logger.debug(EELFLoggerDelegate.debugLogger,dateFormat.format(new Date()) + "<== " + methodName + " No response entity, this is probably ok, e="
            			+ e.getMessage());
            }
   
        } 
		catch (Exception e)
        {
        	 logger.debug(EELFLoggerDelegate.debugLogger,dateFormat.format(new Date()) + "<== " + methodName + " with url="+url+ ", Exception: " + e.toString());
        	 throw e;
        
        }
	}
	
	@SuppressWarnings("unchecked")
	public <T> void Post(T t, JSONObject requestDetails, String uuid, String path, RestObject<T> restObject) {
		
        String methodName = "Post";
        String url="";

        System.out.println( "POST policy rest interface");
       
        try {
            
            initRestClient();    
    
            url = SystemProperties.getProperty(PolicyProperties.POLICY_SERVER_URL_VAL) + path;
            System.out.println( "<== " +  methodName + " sending request to url= " + url);
            // Change the content length
            final Response cres = client.target(url)
            	 .request()
                 .accept(APPLICATION_JSON)
	        	 .headers(commonHeaders)
                 //.header("content-length", 201)
                 //.header("X-FromAppId",  sourceID)
                 .post(Entity.entity(requestDetails, MediaType.APPLICATION_JSON));
            
            try {
	   			t = (T) cres.readEntity(t.getClass());
	   			restObject.set(t);
            }
            catch ( Exception e ) {
            	
            	System.out.println("<== " + methodName + " No response entity, this is probably ok, e=" + e.getMessage());
            }

            int status = cres.getStatus();
    		restObject.setStatusCode (status);
    		
    		if ( status >= 200 && status <= 299 ) {
    			System.out.println( "<== " + methodName + " REST api POST was successful!");
    		
             } else {
            	 System.out.println( "<== " + methodName + " with status="+status+", url="+url);
             }    
   
        } catch (Exception e)
        {
        	System.out.println( "<== " + methodName + " with url="+url+ ", Exception: " + e.toString());
        	 throw e;
        
        }
    }
	
	public <T> T getInstance(Class<T> clazz) throws IllegalAccessException, InstantiationException
	{
		return clazz.newInstance();
	}

	@Override
	public void logRequest(RequestDetails r) {
		// TODO Auto-generated method stub
	} 	
}