/*-
 * ============LICENSE_START=======================================================
 * OPENECOMP - MSO
 * ================================================================================
 * 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.bpmn.infrastructure.scripts;

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

import org.openecomp.mso.bpmn.core.json.JsonUtils
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.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.runtime.Execution
import org.json.JSONObject;
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>DoDeleteServiceInstance.bpmn</class> process.
 * 
 * Inputs:
 * @param - msoRequestId
 * @param - globalSubscriberId - O
 * @param - subscriptionServiceType - O
 * @param - serviceInstanceId
 * @param - serviceInstanceName - O
 * @param - serviceModelInfo - O
 * @param - productFamilyId
 * @param - sdncVersion 
 * @param - failNotFound - TODO
 * @param - serviceInputParams - TODO
 *
 * Outputs:
 * @param - WorkflowException
 * 
 * Rollback - Deferred
 */
public class DoDeleteServiceInstance extends AbstractServiceTaskProcessor {

	String Prefix="DDELSI_"
	ExceptionUtil exceptionUtil = new ExceptionUtil()
	JsonUtils jsonUtil = new JsonUtils()
	VidUtils vidUtils = new VidUtils()

	public void preProcessRequest (Execution execution) {
		def isDebugEnabled = execution.getVariable("isDebugLogEnabled")
		utils.log("DEBUG"," ***** preProcessRequest *****",  isDebugEnabled)
		String msg = ""

		try {
			String requestId = execution.getVariable("msoRequestId")
			execution.setVariable("prefix",Prefix)

			//Inputs
			//requestDetails.subscriberInfo. for AAI GET & PUT & SDNC assignToplology
			String globalSubscriberId = execution.getVariable("globalSubscriberId") //globalCustomerId
			if (globalSubscriberId == null)
			{
				execution.setVariable("globalSubscriberId", "")
			}

			//requestDetails.requestParameters. for AAI PUT & SDNC assignTopology
			String subscriptionServiceType = execution.getVariable("subscriptionServiceType")
			if (subscriptionServiceType == null)
			{
				execution.setVariable("subscriptionServiceType", "")
			}

			//Generated in parent for AAI PUT
			String serviceInstanceId = execution.getVariable("serviceInstanceId")
			if (isBlank(serviceInstanceId)){
				msg = "Input serviceInstanceId is null"
				utils.log("DEBUG", msg, isDebugEnabled)
				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
			}

			String sdncCallbackUrl = execution.getVariable('URN_mso_workflow_sdncadapter_callback')
			if (isBlank(sdncCallbackUrl)) {
				msg = "URN_mso_workflow_sdncadapter_callback is null"
				utils.log("DEBUG", msg, isDebugEnabled)
				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
			}
			execution.setVariable("sdncCallbackUrl", sdncCallbackUrl)
			utils.log("DEBUG","SDNC Callback URL: " + sdncCallbackUrl, isDebugEnabled)

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

	public void preProcessSDNCDelete (Execution execution) {
		def isDebugEnabled = execution.getVariable("isDebugLogEnabled")
		utils.log("DEBUG"," ***** preProcessSDNCDelete *****", isDebugEnabled)
		String msg = ""

		try {
			/*
			 String uuid = execution.getVariable('testReqId') // for junits
			 if(uuid==null){
			 uuid = execution.getVariable("msoRequestId") + "-" +  	System.currentTimeMillis()
			 }
			 */
			def serviceInstanceId = execution.getVariable("serviceInstanceId")
			def serviceInstanceName = execution.getVariable("serviceInstanceName")
			def callbackURL = execution.getVariable("sdncCallbackUrl")
			def requestId = execution.getVariable("msoRequestId")
			def serviceId = execution.getVariable("productFamilyId")
			def subscriptionServiceType = execution.getVariable("subscriptionServiceType")
			def globalSubscriberId = execution.getVariable("globalSubscriberId") //globalCustomerId

			String serviceModelInfo = execution.getVariable("serviceModelInfo")
			def modelInvariantId = ""
			def modelVersion = ""
			def modelUUId = ""
			def modelName = ""
			if (!isBlank(serviceModelInfo))
			{
				modelInvariantId = jsonUtil.getJsonValue(serviceModelInfo, "modelInvariantId")
				modelVersion = jsonUtil.getJsonValue(serviceModelInfo, "modelVersion")
				modelUUId = jsonUtil.getJsonValue(serviceModelInfo, "modelVersionId")
				modelName = jsonUtil.getJsonValue(serviceModelInfo, "modelName")
				
				if (modelInvariantId == null) {
					modelInvariantId = ""
				}
				if (modelVersion == null) {
					modelVersion = ""
				}
				if (modelUUId == null) {
					modelUUId = ""
				}
				if (modelName == null) {
					modelName = ""
				}
			}
			if (serviceInstanceName == null) {
				serviceInstanceName = ""
			}
			if (serviceId == null) {
				serviceId = ""
			}
			
			def sdncRequestId = UUID.randomUUID().toString()

			String sdncDelete =
			"""<sdncadapterworkflow:SDNCAdapterWorkflowRequest xmlns:ns5="http://org.openecomp/mso/request/types/v1"
													xmlns:sdncadapterworkflow="http://org.openecomp/mso/workflow/schema/v1"
													xmlns:sdncadapter="http://org.openecomp/workflow/sdnc/adapter/schema/v1">
				   <sdncadapter:RequestHeader>
							<sdncadapter:RequestId>${sdncRequestId}</sdncadapter:RequestId>
							<sdncadapter:SvcInstanceId>${serviceInstanceId}</sdncadapter:SvcInstanceId>
							<sdncadapter:SvcAction>delete</sdncadapter:SvcAction>
							<sdncadapter:SvcOperation>service-topology-operation</sdncadapter:SvcOperation>
							<sdncadapter:CallbackUrl>${callbackURL}</sdncadapter:CallbackUrl>
					</sdncadapter:RequestHeader>
				<sdncadapterworkflow:SDNCRequestData>
					<request-information>
						<request-id>${requestId}</request-id>
						<source>MSO</source>
						<notification-url/>
						<order-number/>
						<order-version/>
						<request-action>DeleteServiceInstance</request-action>
					</request-information>
					<service-information>
						<service-id>${serviceId}</service-id>
						<subscription-service-type>${subscriptionServiceType}</subscription-service-type>
						<ecomp-model-information>
					         <model-invariant-uuid>${modelInvariantId}</model-invariant-uuid>
					         <model-uuid>${modelUUId}</model-uuid>
					         <model-version>${modelVersion}</model-version>
					         <model-name>${modelName}</model-name>
					    </ecomp-model-information>
						<service-instance-id>${serviceInstanceId}</service-instance-id>
						<subscriber-name/>
						<global-customer-id>${globalSubscriberId}</global-customer-id>
					</service-information>
					<service-request-input>
						<service-instance-name>${serviceInstanceName}</service-instance-name>
					</service-request-input>
				</sdncadapterworkflow:SDNCRequestData>
				</sdncadapterworkflow:SDNCAdapterWorkflowRequest>"""

			sdncDelete = utils.formatXml(sdncDelete)
			def sdncRequestId2 = UUID.randomUUID().toString()
			String sdncDeactivate = sdncDelete.replace(">delete<", ">deactivate<").replace(">${sdncRequestId}<", ">${sdncRequestId2}<")
			execution.setVariable("sdncDelete", sdncDelete)
			execution.setVariable("sdncDeactivate", sdncDeactivate)
			utils.log("DEBUG","sdncDeactivate:\n" + sdncDeactivate, isDebugEnabled)
			utils.log("DEBUG","sdncDelete:\n" + sdncDelete, isDebugEnabled)

		} catch (BpmnError e) {
			throw e;
		} catch(Exception ex) {
			msg = "Exception in preProcessSDNCDelete. " + ex.getMessage()
			utils.log("DEBUG", msg, isDebugEnabled)
			exceptionUtil.buildAndThrowWorkflowException(execution, 7000, "Exception Occured in preProcessSDNCDelete.\n" + ex.getMessage())
		}
		utils.log("DEBUG"," *****Exit preProcessSDNCDelete *****", isDebugEnabled)
	}

	public void postProcessSDNCDelete(Execution execution, String response, String method) {

		def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
		utils.log("DEBUG"," ***** postProcessSDNC " + method + " *****", isDebugEnabled)
		String msg = ""

		try {
			WorkflowException workflowException = execution.getVariable("WorkflowException")
			boolean successIndicator = execution.getVariable("SDNCA_SuccessIndicator")
			utils.log("DEBUG", "SDNCResponse: " + response, isDebugEnabled)
			utils.log("DEBUG", "workflowException: " + workflowException, isDebugEnabled)
			
			SDNCAdapterUtils sdncAdapterUtils = new SDNCAdapterUtils(this)
			sdncAdapterUtils.validateSDNCResponse(execution, response, workflowException, successIndicator)

			if(execution.getVariable(Prefix + 'sdncResponseSuccess') == true){
				utils.log("DEBUG","Good response from SDNC Adapter for service-instance " + method + "response:\n" + response, isDebugEnabled)

			}else{
				msg = "Bad Response from SDNC Adapter for service-instance " + method
				utils.log("DEBUG", msg, isDebugEnabled)
				exceptionUtil.buildAndThrowWorkflowException(execution, 3500, msg)
			}
		} catch (BpmnError e) {
			throw e;
		} catch(Exception ex) {
			msg = "Exception in postProcessSDNC " + method + " Exception:" + ex.getMessage()
			utils.log("DEBUG", msg, isDebugEnabled)
			exceptionUtil.buildAndThrowWorkflowException(execution, 7000, msg)
		}
		utils.log("DEBUG"," *** Exit postProcessSDNC " + method + " ***", isDebugEnabled)
	}

	public void postProcessAAIGET(Execution execution) {
		def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
		utils.log("DEBUG"," ***** postProcessAAIGET ***** ", isDebugEnabled)
		String msg = ""

		try {

			String serviceInstanceId = execution.getVariable("serviceInstanceId")
			boolean foundInAAI = execution.getVariable("GENGS_FoundIndicator")

			if(foundInAAI == true){
				utils.log("DEBUG","Found Service-instance in AAI", isDebugEnabled)

				//Extract GlobalSubscriberId
				String siRelatedLink = execution.getVariable("GENGS_siResourceLink")
				if (isBlank(siRelatedLink))
				{
					msg = "Could not retrive ServiceInstance data from AAI to delete id:" + serviceInstanceId
					utils.log("DEBUG", msg, isDebugEnabled)
					exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
				}
				else
				{
					utils.log("DEBUG","Found Service-instance in AAI. link: " + siRelatedLink, isDebugEnabled)
					String  globalSubscriberId = execution.getVariable("globalSubscriberId")
					if(isBlank(globalSubscriberId)){
						int custStart = siRelatedLink.indexOf("customer/")
						int custEnd = siRelatedLink.indexOf("/service-subscriptions")
						globalSubscriberId = siRelatedLink.substring(custStart + 9, custEnd)
						execution.setVariable("globalSubscriberId", globalSubscriberId)
					}

					//Extract Service Type if not provided on request
					String serviceType = execution.getVariable("subscriptionServiceType")
					if(isBlank(serviceType)){
						int serviceStart = siRelatedLink.indexOf("service-subscription/")
						int serviceEnd = siRelatedLink.indexOf("/service-instances/")
						String serviceTypeEncoded = siRelatedLink.substring(serviceStart + 21, serviceEnd)
						serviceType = UriUtils.decode(serviceTypeEncoded, "UTF-8")
						execution.setVariable("subscriptionServiceType", serviceType)
					}

					if (isBlank(globalSubscriberId) || isBlank(serviceType))
					{
						msg = "Could not retrive global-customer-id & service-type from AAI to delete id:" + serviceInstanceId
						utils.log("DEBUG", msg, isDebugEnabled)
						exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
					}
				}

				String siData = execution.getVariable("GENGS_service")
				utils.log("DEBUG", "SI Data", isDebugEnabled)
				if (isBlank(siData))
				{
					msg = "Could not retrive ServiceInstance data from AAI to delete id:" + serviceInstanceId
					utils.log("DEBUG", msg, isDebugEnabled)
					exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
				}
				else
				{
					utils.log("DEBUG", "SI Data" + siData, isDebugEnabled)
					//Confirm there are no related service instances (vnf/network or volume)
					if (utils.nodeExists(siData, "relationship-list")) {
						utils.log("DEBUG", "SI Data relationship-list exists:", isDebugEnabled)
						InputSource source = new InputSource(new StringReader(siData));
						DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
						DocumentBuilder docBuilder = docFactory.newDocumentBuilder()
						Document serviceXml = docBuilder.parse(source)

						NodeList nodeList = serviceXml.getElementsByTagName("relationship")
						for (int x = 0; x < nodeList.getLength(); x++) {
							Node node = nodeList.item(x)
							if (node.getNodeType() == Node.ELEMENT_NODE) {
								Element eElement = (Element) node
								def e = eElement.getElementsByTagName("related-to").item(0).getTextContent()
								if(e.equals("generic-vnf") || e.equals("l3-network")){
									utils.log("DEBUG", "ServiceInstance still has relationship(s) to generic-vnfs or l3-networks", isDebugEnabled)
									execution.setVariable("siInUse", true)
									//there are relationship dependencies to this Service Instance
									msg = " Stopped deleting Service Instance, it has dependencies. Service instance id: " + serviceInstanceId
									utils.log("DEBUG", msg, isDebugEnabled)
									exceptionUtil.buildAndThrowWorkflowException(execution, 2500, msg)
								}else{
									utils.log("DEBUG", "Relationship NOT related to OpenStack", isDebugEnabled)
								}
							}
						}
					}
				}
			}else{
				boolean succInAAI = execution.getVariable("GENGS_SuccessIndicator")
				if(succInAAI != true){
					utils.log("DEBUG","Error getting Service-instance from AAI", + serviceInstanceId, isDebugEnabled)
					WorkflowException workflowException = execution.getVariable("WorkflowException")
					utils.logAudit("workflowException: " + workflowException)
					if(workflowException != null){
						exceptionUtil.buildAndThrowWorkflowException(execution, workflowException.getErrorCode(), workflowException.getErrorMessage())
					}
					else
					{
						msg = "Failure in postProcessAAIGET GENGS_SuccessIndicator:" + succInAAI
						utils.log("DEBUG", msg, isDebugEnabled)
						exceptionUtil.buildAndThrowWorkflowException(execution, 2500, msg)
					}
				}
				utils.log("DEBUG","Service-instance NOT found in AAI. Silent Success", isDebugEnabled)
			}
		} catch (BpmnError e) {
			throw e;
		} catch (Exception ex) {
			msg = "Exception in DoDeleteServiceInstance.postProcessAAIGET. " + ex.getMessage()
			utils.log("DEBUG", msg, isDebugEnabled)
			exceptionUtil.buildAndThrowWorkflowException(execution, 7000, msg)
		}
		utils.log("DEBUG"," *** Exit postProcessAAIGET *** ", isDebugEnabled)
	}
	
	public void postProcessAAIDEL(Execution execution) {
		def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
		utils.log("DEBUG"," ***** postProcessAAIDEL ***** ", isDebugEnabled)
		String msg = ""
		try {
			String serviceInstanceId = execution.getVariable("serviceInstanceId")
			boolean succInAAI = execution.getVariable("GENDS_SuccessIndicator")
			if(succInAAI != true){
				msg = "Error deleting Service-instance in AAI" + serviceInstanceId
				utils.log("DEBUG", msg, isDebugEnabled)
				WorkflowException workflowException = execution.getVariable("WorkflowException")
				utils.logAudit("workflowException: " + workflowException)
				if(workflowException != null){
					exceptionUtil.buildAndThrowWorkflowException(execution, workflowException.getErrorCode(), workflowException.getErrorMessage())
				}
				else
				{
					exceptionUtil.buildAndThrowWorkflowException(execution, 2500, msg)
				}
			}
		} catch (BpmnError e) {
			throw e;
		} catch (Exception ex) {
			msg = "Exception in DoDeleteServiceInstance.postProcessAAIDEL. " + ex.getMessage()
			utils.log("DEBUG", msg, isDebugEnabled)
			exceptionUtil.buildAndThrowWorkflowException(execution, 7000, msg)
		}
		utils.log("DEBUG"," *** Exit postProcessAAIDEL *** ", isDebugEnabled)
	}
}