package org.gcube.vremanagement.vremodeler.impl;

import java.io.StringReader;
import java.sql.ResultSet;
import java.util.ArrayList;
import org.apache.axis.components.uuid.UUIDGen;
import org.apache.axis.components.uuid.UUIDGenFactory;
import org.apache.axis.message.addressing.EndpointReferenceType;
import org.gcube.common.core.faults.GCUBEFault;
import org.gcube.common.core.porttypes.GCUBEStartupPortType;
import org.gcube.common.core.utils.logging.GCUBELog;
import org.gcube.vremanagement.vremodeler.db.DBInterface;
import org.globus.wsrf.encoding.ObjectDeserializer;
import org.globus.wsrf.tests.basic.CreateResource;
import org.xml.sax.InputSource;



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() throws GCUBEFault {
		ArrayList<String> toReturn= new ArrayList<String>(); 
		ResultSet res=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 GCUBEFault(e);}
		GetExistingNamesResponseMessage response = new GetExistingNamesResponseMessage();
		response.setNames(toReturn.toArray(new String[0]));
		return response;
	}
	
	
	
	
	/**
	 * Initialize the DB
	 * 
	 * @param request void
	 * @return void
	 * @throws RemoteException remote exception
	 */
	public void initDB() throws GCUBEFault {
		logger.debug("initDB method");
		//new InitThread(factoryEPR, cred).start();
				
	}
	
	
	/**
	 * 
	 * @param request void
	 * @return String
	 * @throws RemoteException -
	 */
	public String getAllVREs()  throws GCUBEFault{
		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 GCUBEFault(e);}
		try {
			 toReturn=XMLUtil.PrepareAllVREsXML(res);
		} catch (Exception e) {
			logger.error("VDLModel parsing error in function getAllDLs "+e.getMessage());
			throw new GCUBEFault(e);
		}
		return toReturn;
		
	}

		
	/**
	 * 
	 * remove the DL instance
	 * 
	 * @param request the id of DL to remove
	 * @return void
	 * @throws RemoteException -
	 */
	public void removeDL(String request) throws GCUBEFault{
		try{
			ResultSet res=DBInterface.queryDB("Select VRE.epr from VRE where VRE.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("VRE not retreived in DB");
			
			//destroy the resource;
			DBInterface.ExecuteUpdate("DELETE FROM VRE where VRE.id='"+request+"';");
			
		}catch(Exception e){
			logger.error("VDLModel: "+e.getMessage());
			throw new GCUBEFault( e);
		}
		
	}


	
	
}