/*-
 * ============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 com.att.bpm.scripts;

//import groovy.util.Node;

import java.util.concurrent.ExecutionException;

import org.camunda.bpm.engine.delegate.BpmnError
import org.camunda.bpm.engine.runtime.Execution
import org.apache.commons.lang3.*

import javax.xml.parsers.DocumentBuilder
import javax.xml.parsers.DocumentBuilderFactory

import org.w3c.dom.Document
import org.w3c.dom.Element
import org.w3c.dom.NamedNodeMap
import org.w3c.dom.Node
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource


import org.openecomp.mso.bpmn.core.WorkflowException


public abstract class VfModuleBase extends AbstractServiceTaskProcessor {
	
	protected XmlParser xmlParser = new XmlParser()
	
	/**
	 * Get the XmlParser.
	 * 
	 * @return the XmlParser.
	 */
	protected XmlParser getXmlParser() {
		return xmlParser
	}
	
	/**
	 * Find the VF Module with specified ID in the specified Generic VF.  If no such
	 * VF Module is found, null is returned.
	 * 
	 * @param genericVnf The Generic VNF in which to search for the specified VF Moduel.
	 * @param vfModuleId The ID of the VF Module for which to search.
	 * @return a VFModule object for the found VF Module or null if no VF Module is found.
	 */
	protected VfModule findVfModule(String genericVnf, String vfModuleId) {
		
		def genericVnfNode = xmlParser.parseText(genericVnf)
		def vfModulesNode = utils.getChildNode(genericVnfNode, 'vf-modules')
		if (vfModulesNode == null) {
			return null
		}
		def vfModuleList = utils.getIdenticalChildren(vfModulesNode, 'vf-module')
		for (vfModuleNode in vfModuleList) {
			def vfModuleIdNode = utils.getChildNode(vfModuleNode, 'vf-module-id')
			if ((vfModuleIdNode != null) && (vfModuleIdNode.text().equals(vfModuleId))) {
				return new VfModule(vfModuleNode, (vfModuleList.size() == 1))
			}
		}
		return null
	}
	
	/**
	 * Transform all '*_network' parameter specifications from the incoming '*-params' root
	 * element to a corresponding list of 'vnf-networks' specifications (typically used when
	 * invoking the VNF Rest Adpater). Each element in '*-params' whose name attribute ends
	 * with '_network' is used to create an 'vnf-networks' element.
	 * 
	 * @param paramsNode A Node representing a '*-params' element.
	 * @return a String of 'vnf-networks' elements, one for each 'param' element whose name
	 * attribute ends with '_network'.
	 */
	protected String transformNetworkParamsToVnfNetworks(String paramsRootXml) {
		if ((paramsRootXml == null) || (paramsRootXml.isEmpty())) {
			return ''
		}
		def String vnfNetworks = ''
		try {
			paramsRootXml = utils.removeXmlNamespaces(paramsRootXml)
			def paramsNode = xmlParser.parseText(paramsRootXml)
			def params = utils.getIdenticalChildren(paramsNode, 'param')
			for (param in params) {
				def String attrName = (String) param.attribute('name')
				if (attrName.endsWith('_network')) {
					def networkRole = attrName.substring(0, (attrName.length()-'_network'.length()))
					def networkName = param.text()
					String vnfNetwork = """
						<vnf-networks>
							<network-role>${networkRole}</network-role>
							<network-name>${networkName}</network-name>
						</vnf-networks>
					"""
					vnfNetworks = vnfNetworks + vnfNetwork
				}
			}
		} catch (Exception e) {
			logWarn('Exception transforming \'_network\' params to vnfNetworks', e)
		}
		return vnfNetworks
	}
	
	/**
	 * Transform the parameter specifications from the incoming '*-params' root element to
	 * a corresponding list of 'entry's (typically used when invoking the VNF Rest Adpater).
	 * Each element in '*-params' is used to create an 'entry' element.
	 *
	 * @param paramsNode A Node representing a '*-params' element.
	 * @return a String of 'entry' elements, one for each 'param' element.
	 */
	protected String transformParamsToEntries(String paramsRootXml) {
		if ((paramsRootXml == null) || (paramsRootXml.isEmpty())) {
			return ''
		}
		def String entries = ''
		try {
			paramsRootXml = utils.removeXmlNamespaces(paramsRootXml)
			def paramsNode = xmlParser.parseText(paramsRootXml)
			def params = utils.getIdenticalChildren(paramsNode, 'param')
			for (param in params) {
				def key = (String) param.attribute('name')
				if (key == null) {
					key = ''
				}
				def value = (String) param.text()
				String entry = """
					<entry>
						<key>${key}</key>
						<value>${value}</value>
					</entry>
				"""
				entries = entries + entry
			}
		} catch (Exception e) {
			logWarn('Exception transforming params to entries', e)
		}
		return entries
	}
	
	/**
	 * Transform the parameter specifications from the incoming '*-params' root element to
	 * a corresponding list of 'entry's (typically used when invoking the VNF Rest Adpater).
	 * Each element in '*-params' is used to create an 'entry' element.
	 *
	 * @param paramsNode A Node representing a '*-params' element.
	 * @return a String of 'entry' elements, one for each 'param' element.
	 */
	protected String transformVolumeParamsToEntries(String paramsRootXml) {
		if ((paramsRootXml == null) || (paramsRootXml.isEmpty())) {
			return ''
		}
		def String entries = ''
		try {
			paramsRootXml = utils.removeXmlNamespaces(paramsRootXml)
			def paramsNode = xmlParser.parseText(paramsRootXml)
			def params = utils.getIdenticalChildren(paramsNode, 'param')
			for (param in params) {
				def key = (String) param.attribute('name')
				if (key == null) {
					key = ''
				}
				if ( !(key in ['vnf_id', 'vnf_name', 'vf_module_id', 'vf_module_name'])) {
					def value = (String) param.text()
					String entry = """
						<entry>
							<key>${key}</key>
							<value>${value}</value>
						</entry>
					"""
					entries = entries + entry
				}
			}
		} catch (Exception e) {
			logWarn('Exception transforming params to entries', e)
		}
		return entries
	}
	
	/**
	 * Extract the Tenant Id from the Volume Group information returned by AAI.
	 * 
	 * @param volumeGroupXml Volume Group XML returned by AAI.
	 * @return the Tenant Id extracted from the Volume Group information. 'null' is returned if
	 * the Tenant Id is missing or could not otherwise be extracted.
	 */
	protected String getTenantIdFromVolumeGroup(String volumeGroupXml) {
		def groovy.util.Node volumeGroupNode = xmlParser.parseText(volumeGroupXml)
		def groovy.util.Node relationshipList = utils.getChildNode(volumeGroupNode, 'relationship-list')
		if (relationshipList != null) {
			def groovy.util.NodeList relationships = utils.getIdenticalChildren(relationshipList, 'relationship')
			for (groovy.util.Node relationship in relationships) {
				def groovy.util.Node relatedTo = utils.getChildNode(relationship, 'related-to')
				if ((relatedTo != null) && (relatedTo.text().equals('tenant'))) {
					def groovy.util.NodeList relationshipDataList = utils.getIdenticalChildren(relationship, 'relationship-data')
					for (groovy.util.Node relationshipData in relationshipDataList) {
						def groovy.util.Node relationshipKey = utils.getChildNode(relationshipData, 'relationship-key')
						if ((relationshipKey != null) && (relationshipKey.text().equals('tenant.tenant-id'))) {
							def groovy.util.Node relationshipValue = utils.getChildNode(relationshipData, 'relationship-value')
							if (relationshipValue != null) {
								return relationshipValue.text()
							}
						}
					}
				}
			}
		}
		return null
	}
	
	
	/*
	 * Parses VNF parameters passed in on the incoming requests and SDNC parameters returned from SDNC get response 
	 * and puts them into the format expected by VNF adapter.
	 * @param vnfParamsMap -  map of VNF parameters passed in the request body
	 * @param sdncGetResponse - response string from SDNC GET topology request
	 * @param vnfId
	 * @param vnfName
	 * @param vfModuleId
	 * @param vfModuleName
	 * @return a String of key/value entries for vfModuleParams
	 */
	  
	 
	 protected String buildVfModuleParams(String vnfParams, String sdncGetResponse, String vnfId, String vnfName,
			String vfModuleId, String vfModuleName) {
			
			//Get SDNC Response Data 		
			
			String data = utils.getNodeXml(sdncGetResponse, "response-data")
			data = data.replaceAll("&lt;", "<")
			data = data.replaceAll("&gt;", ">")

			String serviceData = utils.getNodeXml(data, "service-data")
			serviceData = utils.removeXmlPreamble(serviceData)
			serviceData = utils.removeXmlNamespaces(serviceData)
			String vnfRequestInfo = utils.getNodeXml(serviceData, "vnf-request-information")
			String oldVnfId = utils.getNodeXml(vnfRequestInfo, "vnf-id")
			oldVnfId = utils.removeXmlPreamble(oldVnfId)
			oldVnfId = utils.removeXmlNamespaces(oldVnfId)
			serviceData = serviceData.replace(oldVnfId, "")
			def vnfId1 = utils.getNodeText1(serviceData, "vnf-id")			

			// Add-on data
			String vnfInfo =
				"""<entry>
						<key>vnf_id</key>
						<value>${vnfId}</value>
					</entry>
					<entry>
						<key>vnf_name</key>
						<value>${vnfName}</value>
					</entry>
					<entry>
						<key>vf_module_id</key>
						<value>${vfModuleId}</value>
					</entry>
					<entry>
						<key>vf_module_name</key>
						<value>${vfModuleName}</value>
					</entry>"""

			utils.logAudit("vnfInfo: " + vnfInfo)
			InputSource source = new InputSource(new StringReader(data));
			DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
			docFactory.setNamespaceAware(true)
			DocumentBuilder docBuilder = docFactory.newDocumentBuilder()
			Document responseXml = docBuilder.parse(source)


			// Availability Zones Data
			String aZones = ""
			StringBuilder sbAZone = new StringBuilder()
			NodeList aZonesList = responseXml.getElementsByTagNameNS("*", "availability-zones")
			String aZonePosition = "0"
			for (int z = 0; z < aZonesList.getLength(); z++) {
				Node node = aZonesList.item(z)
				if (node.getNodeType() == Node.ELEMENT_NODE) {
					Element eElement = (Element) node
					String aZoneValue = utils.getElementText(eElement, "availability-zone")
					aZonePosition = z.toString()
					String aZoneXml =
							"""<entry>
						<key>availability_zone_${aZonePosition}</key>
						<value>${aZoneValue}</value>
				</entry>"""
					aZones = sbAZone.append(aZoneXml)
				}
			}

			// VNF Networks Data
			String vnfNetworkNetId = ""
			String vnfNetworkNetName = ""
			String vnfNetworkSubNetId = ""
			String vnfNetworkV6SubNetId = ""
			String vnfNetworkNetFqdn = ""
			StringBuilder sbNet = new StringBuilder()
			StringBuilder sbNet2 = new StringBuilder()
			StringBuilder sbNet3 = new StringBuilder()
			StringBuilder sbNet4 = new StringBuilder()
			StringBuilder sbNet5 = new StringBuilder()
			NodeList vnfNetworkList = responseXml.getElementsByTagNameNS("*", "vnf-networks")
			for (int x = 0; x < vnfNetworkList.getLength(); x++) {
				Node node = vnfNetworkList.item(x)
				if (node.getNodeType() == Node.ELEMENT_NODE) {
					Element eElement = (Element) node
					String vnfNetworkKey = utils.getElementText(eElement, "network-role")
					String vnfNetworkNeutronIdValue = utils.getElementText(eElement, "neutron-id")
					String vnfNetworkNetNameValue = utils.getElementText(eElement, "network-name")
					String vnfNetworkSubNetIdValue = utils.getElementText(eElement, "subnet-id")
					String vnfNetworkV6SubNetIdValue = utils.getElementText(eElement, "ipv6-subnet-id")
					String vnfNetworkNetFqdnValue = utils.getElementText(eElement, "contrail-network-fqdn")
					String vnfNetworkNetIdXml =
							"""<entry>
								<key>${vnfNetworkKey}_net_id</key>
								<value>${vnfNetworkNeutronIdValue}</value>
							</entry>"""
					vnfNetworkNetId = sbNet.append(vnfNetworkNetIdXml)
					String vnfNetworkNetNameXml =
							"""<entry>
						<key>${vnfNetworkKey}_net_name</key>
						<value>${vnfNetworkNetNameValue}</value>
				</entry>"""
					vnfNetworkNetName = sbNet2.append(vnfNetworkNetNameXml)
					String vnfNetworkSubNetIdXml =
							"""<entry>
						<key>${vnfNetworkKey}_subnet_id</key>
						<value>${vnfNetworkSubNetIdValue}</value>
				</entry>"""
					vnfNetworkSubNetId = sbNet3.append(vnfNetworkSubNetIdXml)
					String vnfNetworkV6SubNetIdXml =
							"""<entry>
						<key>${vnfNetworkKey}_v6_subnet_id</key>
						<value>${vnfNetworkV6SubNetIdValue}</value>
				</entry>"""
					vnfNetworkV6SubNetId = sbNet5.append(vnfNetworkV6SubNetIdXml)
					String vnfNetworkNetFqdnXml =
							"""<entry>
						<key>${vnfNetworkKey}_net_fqdn</key>
						<value>${vnfNetworkNetFqdnValue}</value>
				</entry>"""
					vnfNetworkNetFqdn = sbNet4.append(vnfNetworkNetFqdnXml)
				}
			}

			// VNF-VMS Data
			String vnfVMS = ""
			String vnfVMSPositions = ""
			String vmNetworks = ""
			String vmNetworksPositions = ""
			String vmNetworksPositionsV6 = ""
			String interfaceRoutePrefixes = ""
			def key
			def value
			def networkKey
			def networkValue
			def floatingIPKey
			def floatingIPKeyValue
			def floatingIPV6Key
			def floatingIPV6KeyValue
			StringBuilder sb = new StringBuilder()
			StringBuilder sbPositions = new StringBuilder()
			StringBuilder sbVmNetworks = new StringBuilder()
			StringBuilder sbNetworksPositions = new StringBuilder()
			StringBuilder sbInterfaceRoutePrefixes = new StringBuilder()
			StringBuilder sbNetworksPositionsV6 = new StringBuilder()

			NodeList vmsList = responseXml.getElementsByTagNameNS("*","vnf-vms")
			for (int x = 0; x < vmsList.getLength(); x++) {
				Node node = vmsList.item(x)
				if (node.getNodeType() == Node.ELEMENT_NODE) {
					Element eElement = (Element) node
					key = utils.getElementText(eElement, "vm-type")
					String values
					String position = "0"
					StringBuilder sb1 = new StringBuilder()
					NodeList valueList = eElement.getElementsByTagNameNS("*","vm-names")
					NodeList vmNetworksList = eElement.getElementsByTagNameNS("*","vm-networks")
					for(int i = 0; i < valueList.getLength(); i++){
						Node node1 = valueList.item(i)
						if (node1.getNodeType() == Node.ELEMENT_NODE) {
							Element eElement1 = (Element) node1
							value = utils.getElementText(eElement1, "vm-name")
							if (i != valueList.getLength() - 1) {
								values = sb1.append(value + ",")
							}
							else {
								values = sb1.append(value);
							}
							position = i.toString()
							String vnfPositionXml =
									"""<entry>
								<key>${key}_name_${position}</key>
								<value>${value}</value>
							</entry>"""
							vnfVMSPositions = sbPositions.append(vnfPositionXml)
						}
					}
					for(int n = 0; n < vmNetworksList.getLength(); n++){
						String floatingIpKeyValueStr = ""
						String floatingIpV6KeyValueStr = ""
						Node nodeNetworkKey = vmNetworksList.item(n)
						if (nodeNetworkKey.getNodeType() == Node.ELEMENT_NODE) {
							Element eElementNetworkKey = (Element) nodeNetworkKey
							String ipAddressValues
							String ipV6AddressValues
							String networkPosition = "0"
							StringBuilder sb2 = new StringBuilder()
							StringBuilder sb3 = new StringBuilder()
							StringBuilder sb4 = new StringBuilder()
							networkKey = utils.getElementText(eElementNetworkKey, "network-role")
							floatingIPKey = key + '_' + networkKey + '_floating_ip'
							floatingIPKeyValue = utils.getElementText(eElementNetworkKey, "floating-ip")
							if(!floatingIPKeyValue.isEmpty()){								
								floatingIpKeyValueStr = """<entry>
								<key>$floatingIPKey</key>
								<value>$floatingIPKeyValue</value>
							</entry>"""
							}
							floatingIPV6Key = key + '_' + networkKey + '_floating_v6_ip'
							floatingIPV6KeyValue = utils.getElementText(eElementNetworkKey, "floating-ip-v6")
							if(!floatingIPV6KeyValue.isEmpty()){								
								floatingIpV6KeyValueStr = """<entry>
								<key>$floatingIPV6Key</key>
								<value>$floatingIPV6KeyValue</value>
							</entry>"""
							}
							NodeList networkIpsList = eElementNetworkKey.getElementsByTagNameNS("*","network-ips")
							for(int a = 0; a < networkIpsList.getLength(); a++){
								Node ipAddress = networkIpsList.item(a)
								if (ipAddress.getNodeType() == Node.ELEMENT_NODE) {
									Element eElementIpAddress = (Element) ipAddress
									String ipAddressValue = utils.getElementText(eElementIpAddress, "ip-address")
									if (a != networkIpsList.getLength() - 1) {
										ipAddressValues = sb2.append(ipAddressValue + ",")
									}
									else {
										ipAddressValues = sb2.append(ipAddressValue);
									}
									networkPosition = a.toString()
									String vmNetworksPositionsXml =
											"""<entry>
										<key>${key}_${networkKey}_ip_${networkPosition}</key>
										<value>${ipAddressValue}</value>
									</entry>"""
									vmNetworksPositions = sbNetworksPositions.append(vmNetworksPositionsXml)
								}
							}
							vmNetworksPositions = sbNetworksPositions.append(floatingIpKeyValueStr).append(floatingIpV6KeyValueStr)
						
							String vmNetworksXml =
									"""<entry>
								<key>${key}_${networkKey}_ips</key>
								<value>${ipAddressValues}</value>
							</entry>"""
							vmNetworks = sbVmNetworks.append(vmNetworksXml)
							
							NodeList interfaceRoutePrefixesList = eElementNetworkKey.getElementsByTagNameNS("*","interface-route-prefixes")
							String interfaceRoutePrefixValues = sb3.append("[")
							
							for(int a = 0; a < interfaceRoutePrefixesList.getLength(); a++){								
								Node interfaceRoutePrefix = interfaceRoutePrefixesList.item(a)								
								if (interfaceRoutePrefix.getNodeType() == Node.ELEMENT_NODE) {
									Element eElementInterfaceRoutePrefix = (Element) interfaceRoutePrefix
									String interfaceRoutePrefixValue = utils.getElementText(eElementInterfaceRoutePrefix, "interface-route-prefix")
									if (a != interfaceRoutePrefixesList.getLength() - 1) {									
										interfaceRoutePrefixValues = sb3.append("{\"interface_route_table_routes_route_prefix\": \"" + interfaceRoutePrefixValue + "\"}" + ",")
									}
									else {
										interfaceRoutePrefixValues = sb3.append("{\"interface_route_table_routes_route_prefix\": \"" + interfaceRoutePrefixValue + "\"}")
									}									
								}
							}
							interfaceRoutePrefixValues = sb3.append("]")
							if (interfaceRoutePrefixesList.getLength() > 0) {
								String interfaceRoutePrefixesXml = 
												"""<entry>
											<key>${key}_${networkKey}_route_prefixes</key>
											<value>${interfaceRoutePrefixValues}</value>
										</entry>"""					
								interfaceRoutePrefixes = sbInterfaceRoutePrefixes.append(interfaceRoutePrefixesXml)
							}
							
							NodeList networkIpsV6List = eElementNetworkKey.getElementsByTagNameNS("*","network-ips-v6")
							for(int a = 0; a < networkIpsV6List.getLength(); a++){
								Node ipV6Address = networkIpsV6List.item(a)
								if (ipV6Address.getNodeType() == Node.ELEMENT_NODE) {
									Element eElementIpV6Address = (Element) ipV6Address
									String ipV6AddressValue = utils.getElementText(eElementIpV6Address, "ip-address-ipv6")
									if (a != networkIpsV6List.getLength() - 1) {
										ipV6AddressValues = sb4.append(ipV6AddressValue + ",")
									}
									else {
										ipV6AddressValues = sb4.append(ipV6AddressValue);
									}
									networkPosition = a.toString()
									String vmNetworksPositionsV6Xml =
											"""<entry>
										<key>${key}_${networkKey}_v6_ip_${networkPosition}</key>
										<value>${ipV6AddressValue}</value>
									</entry>"""
									vmNetworksPositionsV6 = sbNetworksPositionsV6.append(vmNetworksPositionsV6Xml)
								}
							}
							String vmNetworksV6Xml =
									"""<entry>
								<key>${key}_${networkKey}_v6_ips</key>
								<value>${ipV6AddressValues}</value>
							</entry>"""
							vmNetworks = sbVmNetworks.append(vmNetworksV6Xml)
						}
					}
					String vnfXml =
							"""<entry>
				<key>${key}_names</key>
				<value>${values}</value>
					</entry>"""
					vnfVMS = sb.append(vnfXml)
				}
			}
		//SDNC Response Params
			String sdncResponseParams = ""
			List<String> sdncResponseParamsToSkip = ["vnf_id", "vf_module_id", "vnf_name", "vf_module_name"]
			String vnfParamsChildNodes = utils.getChildNodes(data, "vnf-parameters")
			if(vnfParamsChildNodes == null || vnfParamsChildNodes.length() < 1){
				// No SDNC params
			}else{				
				NodeList paramsList = responseXml.getElementsByTagNameNS("*", "vnf-parameters")
				for (int z = 0; z < paramsList.getLength(); z++) {
					Node node = paramsList.item(z)
					Element eElement = (Element) node
					String vnfParameterName = utils.getElementText(eElement, "vnf-parameter-name")
					if (!sdncResponseParamsToSkip.contains(vnfParameterName)) {
						String vnfParameterValue = utils.getElementText(eElement, "vnf-parameter-value")
						String paraEntry =
						"""<entry>
							<key>${vnfParameterName}</key>
							<value>${vnfParameterValue}</value>
						</entry>"""
						sdncResponseParams = sb.append(paraEntry)
					}
				}
			}


		def vfModuleParams = """
		${vnfInfo}
		${aZones}
		${vnfNetworkNetId}
		${vnfNetworkNetName}
		${vnfNetworkSubNetId}
		${vnfNetworkV6SubNetId}
		${vnfNetworkNetFqdn}
        ${vnfVMS}
        ${vnfVMSPositions}
		${vmNetworks}
		${vmNetworksPositions}
		${vmNetworksPositionsV6}
		${interfaceRoutePrefixes}
		${vnfParams}
		${sdncResponseParams}"""
		
		return vfModuleParams
		
	}
	
	
}