package org.gcube.vremanagement.vremodeler.impl;

import java.io.StringReader;
import java.net.URL;
import java.rmi.RemoteException;
import java.sql.ResultSet;
import java.util.ArrayList;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NameNotFoundException;
import javax.naming.NamingException;
import javax.xml.namespace.QName;
import javax.xml.rpc.server.ServiceLifecycle;

import org.apache.axis.components.uuid.UUIDGen;
import org.apache.axis.components.uuid.UUIDGenFactory;
import org.apache.axis.message.addressing.AttributedURI;
import org.apache.axis.message.addressing.EndpointReferenceType;
import org.gcube.common.core.contexts.GCUBEServiceContext;
import org.gcube.common.core.faults.GCUBEFault;
import org.gcube.common.core.porttypes.GCUBEStartupPortType;
import org.gcube.common.core.utils.logging.GCUBELog;
import org.globus.wsrf.Constants;
import org.globus.wsrf.NoResourceHomeException;
import org.globus.wsrf.ResourceContext;
import org.globus.wsrf.ResourceContextException;
import org.globus.wsrf.ResourceHome;
import org.globus.wsrf.ResourceKey;
import org.globus.wsrf.container.ServiceHost;
import org.globus.wsrf.encoding.ObjectDeserializer;
import org.globus.wsrf.impl.SimpleResourceKey;
import org.globus.wsrf.tests.basic.CreateResource;
import org.globus.wsrf.tests.basic.CreateResourceResponse;
import org.globus.wsrf.utils.AddressingUtils;
import org.gridforum.jgss.ExtendedGSSCredential;
import org.oasis.wsrf.lifetime.Destroy;
import org.xml.sax.InputSource;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;



public class ModelFactoryService extends GCUBEStartupPortType{
	
	private GCUBELog logger = new GCUBELog(this);
	private static final UUIDGen uuidGen = UUIDGenFactory.getUUIDGen();
	
	@Override
	protected ServiceContext getServiceContext() {
		return ServiceContext.getContext();
	}
	
	/* Implementation of createResource Operation */
	public EndpointReferenceType createResource(CreateResource request) throws GCUBEFault {
		String id=uuidGen.nextUUID();
		ModelerResource mr;
		try{
			ModelerContext pctx= ModelerContext.getPortTypeContext();
			mr=(ModelerResource)pctx.getWSHome().create(pctx.makeKey(id), id);
			return mr.getEPR();
		}catch (Exception e){logger.error("error creating resource",e); throw new GCUBEFault(e);}
	}
	
	
	/**
	 * return the existing DL Name
	 * 
	 * @param request void
	 * @return array of string qith exististin dl names
	 * @throws RemoteException -
	 */
	public GetExistingNamesResponseMessage getExistingNamesDLs(GetExistingNamesRequestMessage request) throws RemoteException {
		GetExistingNamesResponseMessage response=new GetExistingNamesResponseMessage();
		ArrayList<String> toReturn= new ArrayList<String>(); 
		ResultSet res=null;
		ExtendedGSSCredential cred;
		if (isSecurityEnabled){
			try {
				cred=credentialsListener.getCredentials(new NAL().getDefaultVO());
				if (cred==null) logger.debug("null cerdentials");
				logger.debug("VDLModel - initDB - with credential");
			} catch (Exception e) {
				logger.debug("VDLModel - initDB - null credential");
				cred=null;
			}
		}else cred=null;
		try{
			DBInterface.connect();
			res= DBInterface.queryDB("select DL.name from DL;");
			while (res.next())	toReturn.add(res.getString(1));
			String customXquery="for $query in collection(\"/db/Profiles/VDL\")//Document/Data/child::*[local-name()='Profile']/DILIGENTResource return <name>$query/Profile/Name/string()</name>";
			String queryResult= DISHLSClient.getGeneralQueryManager(cred, factoryEPR).queryDISIC(customXquery,cred, factoryEPR);
			logger.debug("VDL get Name QUERY: "+queryResult);
		}catch(Exception e) {logger.error("VDL Model: error on DB"); throw new RemoteException("VDLModel: error on DB",e);}
		response.setNames(toReturn.toArray(new String[0]));
		return response;
	}
	
	
	
	
	/**
	 * Initialize the DB
	 * 
	 * @param request void
	 * @return void
	 * @throws RemoteException remote exception
	 */
	public VoidType initDB(VoidType request) throws RemoteException {
		logger.debug("initDB method");
		ExtendedGSSCredential cred;
		if (isSecurityEnabled){
			try {
				cred=credentialsListener.getCredentials(new NAL().getDefaultVO());
				if (cred==null) logger.debug("null cerdentials");
				logger.debug("VDLModel - initDB - with credential");
			} catch (Exception e) {
				logger.debug("VDLModel - initDB - null credential");
				cred=null;
			}
		}else cred=null;
		
		new InitThread(factoryEPR, cred).start();
		
		return new VoidType();
	}
	
	
	/**
	 * 
	 * @param request void
	 * @return String
	 * @throws RemoteException -
	 */
	public String getAllDLs(GetAllDLsMessageRequest request) throws RemoteException{
		String toReturn = null;
		ResultSet res=null;
		try{
			DBInterface.connect();
			res= DBInterface.queryDB("select DL.name, DL.description, DL.status, DL.epr  from DL;");
		}catch(Exception e) {logger.error("VDL Model: error on DB"); throw new RemoteException("VDLModel: error on DB",e);}
		try {
			 toReturn=XMLUtil.PrepareAllDLsXML(res);
		} catch (Exception e) {
			logger.error("VDLModel parsing error in function getAllDLs "+e.getMessage());
			throw new RemoteException("VDLModel parsing error in function getAllDLs",e);
		}
		return toReturn;
		
	}

	protected ResourceHome getInstanceResourceHome() throws NoResourceHomeException, ResourceContextException {
		ResourceHome home;
		
		ResourceContext ctx;
			
		logger.debug("DILIGENT: getInstanceResourceHome on ModelFactoryService");
		
		ctx = ResourceContext.getResourceContext();
		
		logger.debug("DILIGENT: Resource Context = " + ctx.toString() + "on getInstanceResourceHome on ModelFactoryService");
		
		String homeLoc = Constants.JNDI_SERVICES_BASE_NAME + ctx.getService() + "/instanceHome";
		
		try {
			Context initialContext = new InitialContext();
			home = (ResourceHome) initialContext.lookup(homeLoc);
		} catch (NameNotFoundException e) {
			throw new NoResourceHomeException();
		} catch (NamingException e) {
			throw new ResourceContextException("", e);
		}

		return home;
	}
	
	
	/**
	 * 
	 * remove the DL instance
	 * 
	 * @param request the id of DL to remove
	 * @return void
	 * @throws RemoteException -
	 */
	public RemoveDLResponseMessage removeDL(String request) throws RemoteException{
		
		
		ResourceManager rMan;
		try{
			ResultSet res=DBInterface.queryDB("Select DL.epr from DL where DL.id='"+request+"';");
			EndpointReferenceType dlEpr;
			
						
			if (res.next()){
				StringReader stringReader = new StringReader(res.getString(1));
				InputSource inputSource = new InputSource(stringReader);
				dlEpr = (EndpointReferenceType) ObjectDeserializer.deserialize(inputSource, EndpointReferenceType.class);
			}else throw new Exception("DL not retreived in DB");
			
			ModelServiceAddressingLocator msal=new ModelServiceAddressingLocator();
			ModelPortType vdlModelPT=msal.getModelPortTypePort(dlEpr);
						
			if (ModelFactoryService.isSecurityEnabled){
				ExtendedGSSCredential cred=org.gcube.vremanagement.vremodeler.impl.credentialsListener.getCredentials((new NAL()).getDefaultVO()); 
				rMan= DISIP.getResourceManager(cred,dlEpr);
				ConfigureSecurity.setSecurity(((javax.xml.rpc.Stub) vdlModelPT), cred);
			}else rMan= DISIP.getResourceManager(null,dlEpr);
						
			rMan.remove(dlEpr);
			vdlModelPT.destroy(new Destroy());
			DBInterface.ExecuteUpdate("DELETE FROM DL where DL.id='"+request+"';");
			
		}catch(Exception e){
			logger.error("VDLModel: "+e.getMessage());
			throw new RemoteException(e.getMessage(), e);}
		return new RemoveDLResponseMessage();
	}


	
	
}