/*-
 * ============LICENSE_START=======================================================
 * ONAP - SO
 * ================================================================================
 * Copyright (C) 2018 Huawei Technologies Co., Ltd. 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.bpmn.infrastructure.scripts;

import static org.apache.commons.lang3.StringUtils.*;
import groovy.xml.XmlUtil
import groovy.json.*

import org.openecomp.mso.bpmn.core.domain.ServiceDecomposition
import org.openecomp.mso.bpmn.core.domain.ServiceInstance
import org.openecomp.mso.bpmn.core.domain.CompareModelsResult
import org.openecomp.mso.bpmn.core.domain.ModelInfo
import org.openecomp.mso.bpmn.core.json.JsonUtils
import org.openecomp.mso.bpmn.common.scripts.AaiUtil
import org.openecomp.mso.bpmn.common.scripts.AbstractServiceTaskProcessor
import org.openecomp.mso.bpmn.common.scripts.ExceptionUtil
import org.openecomp.mso.bpmn.common.scripts.SDNCAdapterUtils
import org.openecomp.mso.bpmn.common.scripts.VidUtils
import org.openecomp.mso.bpmn.core.RollbackData
import org.openecomp.mso.bpmn.core.WorkflowException
import org.openecomp.mso.rest.APIResponse;
import org.openecomp.mso.rest.RESTClient
import org.openecomp.mso.rest.RESTConfig

import java.util.UUID;
import javax.xml.parsers.DocumentBuilder
import javax.xml.parsers.DocumentBuilderFactory

import org.camunda.bpm.engine.delegate.BpmnError
import org.camunda.bpm.engine.delegate.DelegateExecution
import org.json.JSONObject;
import org.json.JSONArray;
import org.apache.commons.lang3.*
import org.apache.commons.codec.binary.Base64;
import org.springframework.web.util.UriUtils;

import org.w3c.dom.Document
import org.w3c.dom.Element
import org.w3c.dom.Node
import org.w3c.dom.NodeList
import org.xml.sax.InputSource
/**
 * This groovy class supports the <class>CompareModelofE2EServiceInstance.bpmn</class> process.
 *
 * Inputs:
 * @param - msoRequestId
 * @param - globalSubscriberId
 * @param - subscriptionServiceType
 * @param - serviceInstanceId
 * @param - modelInvariantIdTarget
 * @param - modelVersionIdTarget

 *
 * Outputs:
 * @param - WorkflowException
 */
public class CompareModelofE2EServiceInstance extends AbstractServiceTaskProcessor {

	String Prefix="CMPMDSI_"
	private static final String DebugFlag = "isDebugEnabled"
	
	ExceptionUtil exceptionUtil = new ExceptionUtil()
	JsonUtils jsonUtil = new JsonUtils()
	VidUtils vidUtils = new VidUtils()

	public void preProcessRequest (DelegateExecution execution) {
		def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
		execution.setVariable("prefix",Prefix)
		String msg = ""
		
		utils.log("INFO", " *** preProcessRequest Request *** ", isDebugEnabled)
	
		try {
			// check for incoming json message/input
			String siRequest = execution.getVariable("bpmnRequest")
			utils.logAudit(siRequest)
			
	
			String requestId = execution.getVariable("mso-request-id")
			execution.setVariable("msoRequestId", requestId)
			utils.log("INFO", "Input Request:" + siRequest + " reqId:" + requestId, isDebugEnabled)
			
			String serviceInstanceId = execution.getVariable("serviceInstanceId")
			if (isBlank(serviceInstanceId)) {
				msg = "Input serviceInstanceId' is null"
				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
			}
			
			//subscriberInfo
			String globalSubscriberId = jsonUtil.getJsonValue(siRequest, "globalSubscriberId")
			if (isBlank(globalSubscriberId)) {
				msg = "Input globalSubscriberId' is null"
				utils.log("INFO", msg, isDebugEnabled)
			} else {
				execution.setVariable("globalSubscriberId", globalSubscriberId)
			}
			
			//subscriptionServiceType
			String subscriptionServiceType = jsonUtil.getJsonValue(siRequest, "serviceType")
			if (isBlank(subscriptionServiceType)) {
				msg = "Input subscriptionServiceType is null"
				utils.log("DEBUG", msg, isDebugEnabled)
				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
			} else {
				execution.setVariable("serviceType", subscriptionServiceType)
			}
			
			//modelInvariantIdTarget
			String modelInvariantIdTarget = jsonUtil.getJsonValue(siRequest, "modelInvariantIdTarget")
			if (isBlank(modelInvariantIdTarget)) {
				msg = "Input modelInvariantIdTarget' is null"
				utils.log("INFO", msg, isDebugEnabled)
				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
			} else {
				execution.setVariable("modelInvariantIdTarget", modelInvariantIdTarget)
			}
			
			//modelVersionIdTarget
			String modelVersionIdTarget = jsonUtil.getJsonValue(siRequest, "modelVersionIdTarget")
			if (isBlank(modelVersionIdTarget)) {
				msg = "Input modelVersionIdTarget is null"
				utils.log("DEBUG", msg, isDebugEnabled)
				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
			} else {
				execution.setVariable("modelVersionIdTarget", modelVersionIdTarget)
			}

			execution.setVariable("operationType", "CompareModel") 	

		} catch (Exception ex){
			msg = "Exception in preProcessRequest " + ex.getMessage()
			utils.log("INFO", msg, isDebugEnabled)
			exceptionUtil.buildAndThrowWorkflowException(execution, 7000, msg)
		}
		utils.log("INFO"," ***** Exit preProcessRequest *****",  isDebugEnabled)
	}

	public void sendSyncResponse (DelegateExecution execution) {
		def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
		utils.log("INFO", " *** sendSyncResponse  *** ", isDebugEnabled)

		try {
			CompareModelsResult compareModelsResult = execution.getVariable("compareModelsResult")
			
			// RESTResponse (for API Handler(APIH) Reply Task)
			String syncResponse = compareModelsResult.toJsonStringNoRootName()
			utils.log("INFO", " sendSynchResponse: xmlSyncResponse - " + "\n" + syncResponse, isDebugEnabled)
			sendWorkflowResponse(execution, 202, syncResponse)

		} catch (Exception ex) {
			String msg  = "Exception in sendSyncResponse: " + ex.getMessage()
			exceptionUtil.buildAndThrowWorkflowException(execution, 7000, msg)
		}
		utils.log("INFO"," ***** Exit sendSyncResopnse *****",  isDebugEnabled)
	}
	
	public void sendSyncError (DelegateExecution execution) {
		def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
		utils.log("INFO", " *** sendSyncError *** ", isDebugEnabled)

		try {
			String errorMessage = ""
			if (execution.getVariable("WorkflowException") instanceof WorkflowException) {
				WorkflowException wfe = execution.getVariable("WorkflowException")
				errorMessage = wfe.getErrorMessage()
			} else {
				errorMessage = "Sending Sync Error."
			}

			String buildworkflowException =
				"""<aetgt:WorkflowException xmlns:aetgt="http://org.openecomp/mso/workflow/schema/v1">
					<aetgt:ErrorMessage>${errorMessage}</aetgt:ErrorMessage>
					<aetgt:ErrorCode>7000</aetgt:ErrorCode>
				   </aetgt:WorkflowException>"""

			utils.logAudit(buildworkflowException)
			sendWorkflowResponse(execution, 500, buildworkflowException)

		} catch (Exception ex) {
			utils.log("INFO", " Sending Sync Error Activity Failed. " + "\n" + ex.getMessage(), isDebugEnabled)
		}

	}
	
	public void prepareCompletionRequest (DelegateExecution execution) {
		def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
		utils.log("INFO", " *** prepareCompletion *** ", isDebugEnabled)

		try {
			String requestId = execution.getVariable("msoRequestId")
			String source = execution.getVariable("source")
			String msoCompletionRequest =
			"""<aetgt:MsoCompletionRequest xmlns:aetgt="http://org.openecomp/mso/workflow/schema/v1"
								xmlns:ns="http://org.openecomp/mso/request/types/v1">
						<request-info xmlns="http://org.openecomp/mso/infra/vnf-request/v1">
							<request-id>${requestId}</request-id>
							<action>COMPAREMODEL</action>
							<source>${source}</source>
			   			</request-info>
						<aetgt:status-message>E2E Service Instance Compare model successfully.</aetgt:status-message>
			   			<aetgt:mso-bpel-name>CompareModelofE2EServiceInstance</aetgt:mso-bpel-name>
					</aetgt:MsoCompletionRequest>"""

			// Format Response
			String xmlMsoCompletionRequest = utils.formatXml(msoCompletionRequest)

			execution.setVariable("completionRequest", xmlMsoCompletionRequest)
			utils.log("INFO", " Overall SUCCESS Response going to CompleteMsoProcess - " + "\n" + xmlMsoCompletionRequest, isDebugEnabled)

		} catch (Exception ex) {
			String msg = " Exception in prepareCompletion:" + ex.getMessage()
			utils.log("INFO", msg, isDebugEnabled)
			exceptionUtil.buildAndThrowWorkflowException(execution, 7000, msg)
		}
		utils.log("INFO", "*** Exit prepareCompletionRequest ***", isDebugEnabled)
	}
	
	public void prepareFalloutRequest(DelegateExecution execution){
		def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
		utils.log("INFO", " *** prepareFalloutRequest *** ", isDebugEnabled)

		try {
			WorkflowException wfex = execution.getVariable("WorkflowException")
			utils.log("INFO", " Input Workflow Exception: " + wfex.toString(), isDebugEnabled)
			String requestId = execution.getVariable("msoRequestId")
			String source = execution.getVariable("source")
			String requestInfo =
			"""<request-info xmlns="http://org.openecomp/mso/infra/vnf-request/v1">
					<request-id>${requestId}</request-id>
					<action>COMPAREMODEL</action>
					<source>${source}</source>
				   </request-info>"""

			String falloutRequest = exceptionUtil.processMainflowsBPMNException(execution, requestInfo)
			execution.setVariable("falloutRequest", falloutRequest)
		} catch (Exception ex) {
			utils.log("INFO", "Exception prepareFalloutRequest:" + ex.getMessage(), isDebugEnabled)
			String errorException = "  Bpmn error encountered in CompareModelofE2EServiceInstance flow. FalloutHandlerRequest,  buildErrorResponse() - " + ex.getMessage()
			String requestId = execution.getVariable("msoRequestId")
			String falloutRequest =
			"""<aetgt:FalloutHandlerRequest xmlns:aetgt="http://org.openecomp/mso/workflow/schema/v1"
					                             xmlns:ns="http://org.openecomp/mso/request/types/v1"
					                             xmlns:wfsch="http://org.openecomp/mso/workflow/schema/v1">
					   <request-info xmlns="http://org.openecomp/mso/infra/vnf-request/v1">
					      <request-id>${requestId}</request-id>
					      <action>COMPAREMODEL</action>
					      <source>UUI</source>
					   </request-info>
						<aetgt:WorkflowException xmlns:aetgt="http://org.openecomp/mso/workflow/schema/v1">
							<aetgt:ErrorMessage>${errorException}</aetgt:ErrorMessage>
							<aetgt:ErrorCode>7000</aetgt:ErrorCode>
						</aetgt:WorkflowException>
					</aetgt:FalloutHandlerRequest>"""

			execution.setVariable("falloutRequest", falloutRequest)
		}
		utils.log("INFO", "*** Exit prepareFalloutRequest ***", isDebugEnabled)
	}

}