/**
 * 
 */
package org.gcube.portlets.user.uriresolvermanager.readers;

import static org.gcube.resources.discovery.icclient.ICFactory.clientFor;
import static org.gcube.resources.discovery.icclient.ICFactory.queryFor;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.gcube.common.resources.gcore.ServiceEndpoint;
import org.gcube.common.resources.gcore.ServiceEndpoint.AccessPoint;
import org.gcube.common.resources.gcore.ServiceEndpoint.Property;
import org.gcube.common.resources.gcore.utils.Group;
import org.gcube.common.scope.api.ScopeProvider;
import org.gcube.portlets.user.uriresolvermanager.entity.ServiceProperty;
import org.gcube.portlets.user.uriresolvermanager.util.ScopeUtil;
import org.gcube.resources.discovery.client.api.DiscoveryClient;
import org.gcube.resources.discovery.client.queries.api.SimpleQuery;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * @Oct 7, 2014
 *
 */
public class RuntimeResourceReader {
	
	public static final Logger logger = LoggerFactory.getLogger(RuntimeResourceReader.class);
	
	public List<ServiceProperty> serviceProperties;

	private String resourceName;

	private String scope;

	/**
	 * @throws Exception 
	 * 
	 */
	public RuntimeResourceReader(String scope, String resourceName) throws Exception {
		this.scope = scope;
		this.resourceName = resourceName;
		readResource(scope, resourceName);
	}
	/**
	 * 
	 * @param scope
	 * @return the application URI
	 * @throws Exception
	 */
	private String readResource(String scope, String resourceName) throws Exception {
		
		try{
			
			this.resourceName = resourceName;
	
			String infraName = ScopeUtil.getInfrastructureNameFromScope(scope);
			
			logger.info("Instancing root scope: "+infraName);
			ScopeProvider.instance.set(infraName);
			
			SimpleQuery query = queryFor(ServiceEndpoint.class);
			query.addCondition("$resource/Profile/Name/string() eq '"+resourceName+"'");
			
			DiscoveryClient<ServiceEndpoint> client = clientFor(ServiceEndpoint.class);
	
			List<ServiceEndpoint> r = client.submit(query);
			if (r == null || r.isEmpty()) throw new Exception("Cannot retrieve the runtime resource: "+resourceName);
	
			ServiceEndpoint se = r.get(0);
			if(se.profile()==null)
				throw new Exception("IS profile is null for resource: "+resourceName);
			
			Group<AccessPoint> accessPoints = se.profile().accessPoints();
			if(accessPoints.size()==0) throw new Exception("Accesspoint in resource "+resourceName+" not found");
			
			AccessPoint ap = accessPoints.iterator().next();
			
			
			Group<Property> properties = ap.properties();
			
			if(properties.size()==0){
				logger.warn("Properties in resource "+resourceName+" not found");
			}else{
		
				serviceProperties = new ArrayList<ServiceProperty>(properties.size());
				
				Iterator<Property> iter = properties.iterator();
			
				while (iter.hasNext()) {
					
					Property prop = iter.next();
					
					serviceProperties.add(new ServiceProperty(prop.value(), true));
				}
			}
			
			logger.info("returning URI: "+ap.address());
			return ap.address();
	//			parameters.setUser(ap.username()); //username
	//			
	//			String decryptedPassword = StringEncrypter.getEncrypter().decrypt(ap.password());
	//			 
	//			parameters.setPassword(decryptedPassword); //password
	//			Group<Property> properties = ap.properties();
			
		}catch (Exception e) {
			logger.error("Sorry, an error occurred on reading the resource "+resourceName+ "Runtime Reosurces",e);
			throw new Exception("Sorry, an error occurred on reading the resource "+resourceName+ "Runtime Reosurces");
		}
	}

	public List<ServiceProperty> getServiceProperties() {
		return serviceProperties;
	}

	public String getResourceName() {
		return resourceName;
	}


	@Override
	public String toString() {
		StringBuilder builder = new StringBuilder();
		builder.append("RuntimeResourceReader [serviceProperties=");
		builder.append(serviceProperties);
		builder.append(", resourceName=");
		builder.append(resourceName);
		builder.append("]");
		return builder.toString();
	}
	
	public static void main(String[] args) {
		try {
			RuntimeResourceReader resolver = new RuntimeResourceReader("/gcube", "Gis-Resolver");
			System.out.println(resolver);
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}


}