/*-
 * ============LICENSE_START=======================================================
 * ONAP - SO
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.mso.adapters.sdnc.impl;


import java.io.StringWriter;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import org.openecomp.mso.logger.MsoLogger;
import org.openecomp.mso.logger.MessageEnum;
public class Utils {

	private static MsoLogger msoLogger = MsoLogger.getMsoLogger(MsoLogger.Catalog.RA);

	public static String genSdncReq(Document reqDoc, RequestTunables rt) {
		try {

			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
			DocumentBuilder db = dbf.newDocumentBuilder();

			//NewDoc for output
			//Root
			Document newdoc = db.newDocument();
			Element root = newdoc.createElementNS(rt.getNamespace(), "input");
			newdoc.appendChild(root);

			//Header
			Element hdr = newdoc.createElement(rt.getHeaderName());
			root.appendChild(hdr);

			String elemData = rt.getReqId();
			Element hdrChild;
			if (elemData != null && elemData.length() > 0)
			{
				hdrChild = newdoc.createElement("svc-request-id");
				hdrChild.appendChild(newdoc.createTextNode(elemData));
				hdr.appendChild(hdrChild);
			}

			elemData = rt.getAction();
			if (elemData != null && elemData.length() > 0)
			{
				hdrChild = newdoc.createElement("svc-action");
				hdrChild.appendChild(newdoc.createTextNode(elemData));
				hdr.appendChild(hdrChild);
			}

			elemData = rt.getSdncaNotificationUrl();
			if (elemData != null && elemData.length() > 0)
			{
				hdrChild = newdoc.createElement("svc-notification-url");
				hdrChild.appendChild(newdoc.createTextNode(elemData));
				hdr.appendChild(hdrChild);
			}

			//RequestData
			NodeList nodes = reqDoc.getDocumentElement().getChildNodes();
			for (int i = 0; i < nodes.getLength(); i++) {
				Node n = nodes.item(i);
				Node newNode = newdoc.importNode(n, true);
				root.appendChild(newNode);
			}

			String s = domToStr(newdoc);
			msoLogger.debug("Formatted SdncReq:\n" + s);
			return s;

		} catch (Exception e) {
			msoLogger.error(MessageEnum.RA_ERROR_CREATE_SDNC_REQUEST, "SDNC", "", MsoLogger.ErrorCode.BusinessProcesssError, "Exception in genSdncReq", e);
		}
		return null;
	}
	
	public static String genSdncPutReq(Document reqDoc, RequestTunables rt) {
		try {

			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
			DocumentBuilder db = dbf.newDocumentBuilder();

			//NewDoc for output
			//Root
			Document newdoc = db.newDocument();
			
			//RequestData
			NodeList nodes = reqDoc.getDocumentElement().getChildNodes();
			
			
			Element root = newdoc.createElement(nodes.item(0).getNodeName());
			newdoc.appendChild(root);

			NodeList childNodes = nodes.item(0).getChildNodes();
			for (int i = 0; i < childNodes.getLength(); i++) {				
					Node n = childNodes.item(i);
					Node newNode = newdoc.importNode(n, true);
					root.appendChild(newNode);				
			}

			String s = domToStr(newdoc);
			msoLogger.debug("Formatted SdncPutReq:\n" + s);
			return s;

		} catch (Exception e) {
			msoLogger.error(MessageEnum.RA_ERROR_CREATE_SDNC_REQUEST, "SDNC", "", MsoLogger.ErrorCode.DataError, "Exception in genSdncPutReq", e);
		}
		return null;
	}

	public static String genMsoFailResp(SDNCResponse resp) {
		try {

			DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
			DocumentBuilder db = dbf.newDocumentBuilder();

			//NewDoc for output
			//Root
			Document newdoc = db.newDocument();
			Element root = newdoc.createElement("output");
			newdoc.appendChild(root);

			Element elem1 = newdoc.createElement("svc-request-id");
			elem1.appendChild(newdoc.createTextNode(resp.getReqId()));
			root.appendChild(elem1);

			Element elem2 = newdoc.createElement("response-code");
			elem2.appendChild(newdoc.createTextNode(String.valueOf(resp.getRespCode())));
			root.appendChild(elem2);

			Element elem3 = newdoc.createElement("response-message");
			elem3.appendChild(newdoc.createTextNode(String.valueOf(resp.getRespMsg())));
			root.appendChild(elem3);

			String s = domToStr(newdoc);
			msoLogger.debug("Formatted SdncReq:" + s);
			return s;

		} catch (Exception e) {
			msoLogger.error(MessageEnum.RA_ERROR_CREATE_SDNC_RESPONSE, "SDNC", "", MsoLogger.ErrorCode.DataError, "Exception in genMsoFailResp", e);
		}
		return null;
	}


	public static String domToStr(Document doc)
	{
		if (doc != null)
		{
			try {
				DOMSource ds = new DOMSource(doc);
				StringWriter sw = new StringWriter();
				StreamResult sr = new StreamResult(sw);
				TransformerFactory tf = TransformerFactory.newInstance();
				Transformer t = tf.newTransformer();
				//t.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");//<?xml version="1.0" encoding="UTF-8"?>
				t.transform(ds, sr);
				String s = sw.toString();
				
				// This is an awful fix for now but we don't want that xmlns="" to be generated
				s = s.replaceAll("xmlns=\"\"", "");
				return s;
			} catch (Exception e) {
				msoLogger.error(MessageEnum.RA_ERROR_CONVERT_XML2STR, "", "", MsoLogger.ErrorCode.DataError, "Exception - domToStr", e);
			}
		}
		return null;
	}
}