/******************************************************************************
"Copyright (c) 2015-2015, Intel Corporation
All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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    and/or other materials provided with the distribution.
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    software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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******************************************************************************/

package com.intel.security;

import java.io.UnsupportedEncodingException;
import org.json.JSONException;
import org.json.JSONObject;

public class SecureTransport {

	protected native int openJNI(String url, int method, String serverKey,
			int timeout, int instanceIDArraySize, long[] instanceIDArray);
	protected native int setURLJNI(long instanceID, String url,String serverKey);
	protected native int setMethodJNI(long instanceID, int method);
	protected native int setHeadersJNI(long instanceID, String headers);
	protected native int getResponseHeaderJNI(long instanceID, int responseHeaderSize,
			byte[] responseHeaderBuffer);
	protected native int getResponseBodyJNI(long instanceID, int responseBodySize,
			byte[] responseBodyBuffer);
	protected native int sendRequestJNI(long instanceID, String requestBody,
			int requestFormat, String secureDataDescriptors,
			long[] httpArray, int answerArraySize, int[] answerArray);
	protected native int abortJNI(long instanceID);
	protected native int destroyJNI(long instanceID);

    final protected String dataEncoding = "UTF-16LE";
    final protected String webStringEncoding = "UTF-8";

	public long OpenAPI(String url, int method, String serverKey,
			int timeout) throws ErrorCodeException {

		// create array to get instanceID as a result in array 
		final int instanceIDArraySize = 1; 
		long[] instanceIDArray = new long[instanceIDArraySize];
		
		int result = openJNI(url, method, serverKey, timeout, 
				instanceIDArraySize, instanceIDArray);
		if (result != 0) {            
			throw new ErrorCodeException(result);
		}

		long instanceID = instanceIDArray[0];        
		return instanceID;    
	}

	public void SetURLAPI(long instanceID, String url,String serverKey) throws ErrorCodeException {

		int result = setURLJNI(instanceID, url,serverKey);
		if (result != 0) {            
			throw new ErrorCodeException(result);
		}

		return;        
	}

	public void SetMethodAPI(long instanceID, int method) throws ErrorCodeException {

		int result = setMethodJNI(instanceID, method);
		if (result != 0) {            
			throw new ErrorCodeException(result);
		}

		return;        
	}
	public void SetHeadersAPI(long instanceID, String headers) throws ErrorCodeException {

		int result = setHeadersJNI(instanceID, headers);
		if (result != 0) {            
			throw new ErrorCodeException(result);
		}

		return;
	}


	public JSONObject SendRequestAPI(long instanceID, String requestBody, int requestFormat, 
			String secureDataDescriptors) throws ErrorCodeException, UnsupportedEncodingException, JSONException {

		// create array to get dataSize as a result in array 
		final int answerArraySize = 2; // [responseHeaderSize, responseBodySize]
		int[] answerArray = new int[answerArraySize];
		long[] httpArray=new long[1];

		int result = sendRequestJNI(instanceID, requestBody, requestFormat, secureDataDescriptors, 
				httpArray,answerArraySize, answerArray);
		if (result != 0) {            
			throw new ErrorCodeException(result);
		}

		String responseHeader = "";

		int responseHeaderSize = answerArray[0];
		if (responseHeaderSize > 0){
			byte[] responseHeaderBuffer = new byte[responseHeaderSize];
			result = getResponseHeaderJNI(instanceID, responseHeaderSize, responseHeaderBuffer);
			if (result != 0) {        
				throw new ErrorCodeException(result);
			}

			responseHeader = new String(responseHeaderBuffer,0,responseHeaderSize-1,webStringEncoding);
		}
		String responseBody = "";
		int responseBodySize = answerArray[1];
		if (responseBodySize > 0){
			byte[] responseBodyBuffer = new byte[responseBodySize];
			result = getResponseBodyJNI(instanceID, responseBodySize, responseBodyBuffer);
			if (result != 0) {        
				throw new ErrorCodeException(result);
			}

			responseBody = new String(responseBodyBuffer,0,responseBodySize-1,webStringEncoding);
		}

		// write response to JSONObject
        JSONObject responseObject = new JSONObject();                   
        responseObject.put("responseHeader", responseHeader);
        responseObject.put("responseBody", responseBody);		
		responseObject.put("responseHttpStatus", httpArray[0]);
		
		return responseObject;
	}

	public void AbortAPI(long instanceID) throws ErrorCodeException {

		int result = abortJNI(instanceID);
		if (result != 0) {            
			throw new ErrorCodeException(result);
		}

		return;        
	} 
	
	public void DestroyAPI(long instanceID) throws ErrorCodeException {

		int result = destroyJNI(instanceID);
		if (result != 0) {            
			throw new ErrorCodeException(result);
		}

		return;        
	}    

}