package org.gcube.datatransfer.resolver.services;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.annotation.Nullable;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.QueryParam;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;
import javax.ws.rs.core.StreamingOutput;

import org.apache.commons.io.IOUtils;
import org.gcube.common.scope.api.ScopeProvider;
import org.gcube.datatransfer.resolver.ConstantsResolver;
import org.gcube.datatransfer.resolver.caches.LoadingGeonetworkInstanceCache;
import org.gcube.datatransfer.resolver.gis.GeonetworkInstance;
import org.gcube.datatransfer.resolver.gis.geonetwork.FilterGetRecords;
import org.gcube.datatransfer.resolver.gis.geonetwork.GNAuthentication;
import org.gcube.datatransfer.resolver.gis.geonetwork.GeonetworkRequestFilterParameters.MODE;
import org.gcube.datatransfer.resolver.gis.geonetwork.GeonetworkRequestFilterParameters.VISIBILITY;
import org.gcube.datatransfer.resolver.gis.geonetwork.ReusableInputStream;
import org.gcube.datatransfer.resolver.services.error.ExceptionManager;
import org.gcube.datatransfer.resolver.util.GetResponseRecordFilter;
import org.gcube.datatransfer.resolver.util.HTTPCallsUtils;
import org.gcube.datatransfer.resolver.util.HTTPCallsUtils.HttpResponse;
import org.gcube.datatransfer.resolver.util.ScopeUtil;
import org.gcube.datatransfer.resolver.util.SingleFileStreamingOutput;
import org.gcube.spatial.data.geonetwork.configuration.Configuration;
import org.gcube.spatial.data.geonetwork.extension.ServerAccess.Version;
import org.gcube.spatial.data.geonetwork.model.Account;
import org.gcube.spatial.data.geonetwork.model.Account.Type;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Document;

/**
 * The GeonetworkResolver is a "middle tier" (like a Proxy) to perform queries
 * on D4Science Geonetwork services.
 * 
 * Request format
 * [GEONETWORK_RESOLVER_BASE_URL]/[SCOPE]/[MODE]/[VISIBILITY]/[FILTER_KEY]/[FILTER_VALUE]/$$
 * 
 * See more at
 * https://gcube.wiki.gcube-system.org/gcube/URI_Resolver#Geonetwork_Resolver
 *
 * @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
 *         Oct 23, 2018
 */
@Path("geonetwork")
public class GeonetworkResolver {

	/**
	 *
	 */
	public static final String REPLACED_A_PUBLIC_UUID_PLEASE_IGNORE = "Replaced a public UUID, please ignore";
	public static final String REPLACED_UUID_BY_FILTER_PLEASE_IGNORE = "Replaced UUID by "
			+ GeonetworkResolver.class.getSimpleName() + " filters, please ignore";

	private static Logger logger = LoggerFactory.getLogger(GeonetworkResolver.class);

	public static final String PATH_PARAM_MODE = "mode";
	public static final String PATH_PARAM_REQUEST_DELIMITER = "requestDelimiter";
//	public static final String PATH_PARAM_OWNER = "owner";
	private static final String PATH_PARAM_VISIBILITY = "visibility";

	private static final String PATH_PARAM_SCOPE = "scope";
	public static final String CSW_SERVER = "srv/en/csw";

	public static final String VALUE_OF_REQUEST_DELIMITIER = "$$";
	public static final String PATH_PARAM_REMAINPATH = "remainPath";

	public static final String QUERY_PARAM_RESET_CACHE_PARAM = "resetcache";
	public static final String QUERY_PARAM_RESET_CACHED_SCOPE_PARAM = "resetcachedscope";

	public static final String SRV_EN_MEF_EXPORT = "/srv/en/mef.export"; // MEF Geonetwork service

	public static final String UUID = "uuid";

	public static final String SCOPE_SEPARATOR = "|";

	// protected Map<String, GeonetworkInstance> cacheGNInstances;

	private String helpURI = "https://wiki.gcube-system.org/gcube/GCube_Resource_Catalogue#Geonetwork_Resolver";

	/**
	 * Gets the geonetwork request criteria. Creates a request criteria from input
	 * parameter pathWithoutGN The parameter pathWithoutGN should be an ordered
	 * string (like REST request): SCOPE/MODE/VISIBILITY/OWNER/$$ SCOPE must be:
	 * ROOT|VO|VRE MODE must be: {@link MODE} VISIBILITY must be: {@link VISIBILITY}
	 * OWNER (is optional): filter by owner
	 *
	 * @param req         the req
	 * @param scope       the scope
	 * @param mode        the mode
	 * @param visibility  the visibility
	 * @param filterKey   the filter key
	 * @param filterValue the filter value
	 * @param remainPath  the remain path
	 * @param resetCache  the reset cache
	 * @param resetScope  the reset scope
	 * @return the geonetwork request criteria
	 * @throws WebApplicationException the web application exception
	 */

	@GET
	@Path("/{" + PATH_PARAM_SCOPE + "}/{" + PATH_PARAM_MODE + "}/{" + PATH_PARAM_VISIBILITY
			+ "}/{filterKey}/{filterValue}/$${" + PATH_PARAM_REMAINPATH + ":(/[^?$]+)?}")
	public Response submitGet(@Context HttpServletRequest req, @PathParam(PATH_PARAM_SCOPE) @Nullable String scope,
			@PathParam(PATH_PARAM_MODE) @Nullable String mode,
			@PathParam(PATH_PARAM_VISIBILITY) @Nullable String visibility,
			@PathParam("filterKey") @Nullable String filterKey, @PathParam("filterValue") @Nullable String filterValue,
			@PathParam(PATH_PARAM_REMAINPATH) @Nullable String remainPath,
			@QueryParam(QUERY_PARAM_RESET_CACHE_PARAM) @Nullable String resetCache,
			@QueryParam(QUERY_PARAM_RESET_CACHED_SCOPE_PARAM) @Nullable String resetScope)
			throws WebApplicationException {

		logger.info(this.getClass().getSimpleName() + " GET starts...");
		String gnGetlURL = null;

		try {
			logger.info(
					"Params are [mode: " + mode + ", scope: " + scope + ", visibility: " + visibility + ", filterKey: "
							+ filterKey + ", filterValue: " + filterValue + ", remainPath: " + remainPath + "]");

			if (scope == null || scope.isEmpty()) {
				logger.error("Path Parameter 'scope' not found");
				throw ExceptionManager.badRequestException(req, "Missing mandatory path parameter 'scope'",
						this.getClass(), helpURI);
			}

			if (mode == null || mode.isEmpty()) {
				logger.error("Path Parameter 'scope' not found");
				throw ExceptionManager.badRequestException(req, "Missing mandatory path parameter 'mode'",
						this.getClass(), helpURI);
			}

			scope = ScopeUtil.normalizeScope(scope, "|");
			mode = mode.toUpperCase();
			try {
				MODE.valueOf(mode);
			} catch (Exception e) {
				List<MODE> toPrint = Arrays.asList(MODE.values());
				logger.error(
						"The 'mode' parameter is wrong, Have you pass a valid parameter MODE like " + toPrint + "?");
				throw ExceptionManager.wrongParameterException(req, "The 'mode' parameter must be value of " + toPrint,
						this.getClass(), helpURI);
			}

			if (visibility == null) {
				logger.error("Path Parameter 'visibility' not found");
				throw ExceptionManager.badRequestException(req, "Missing mandatory path parameter 'visibility'",
						this.getClass(), helpURI);
			}

			visibility = visibility.toUpperCase();
			try {
				VISIBILITY.valueOf(visibility);
			} catch (Exception e) {
				List<VISIBILITY> toPrint = Arrays.asList(VISIBILITY.values());
				logger.error("The 'visibility' parameter is wrong, Have you pass a valid parameter VISIBILITY like "
						+ toPrint + "?");
				throw ExceptionManager.wrongParameterException(req,
						"The 'visibility' parameter must be value of " + toPrint, this.getClass(), helpURI);
			}

			logger.info("Remaining path is: " + remainPath);

			try {

				// I'M LOADING GN CONFIGURATIONS (ENDPOINT, USER, PWD AND SO ON..) FOR PASSED
				// SCOPE FROM GN LIBRARY BY A GENERAL METHOD WITHOUT TO PERFORM AUTHENTICATION
				// ON GN,
				// AFTER THAT I'M USING THEM TO PERFORM AUTHENTICATION ON GN VIA HTTP_CLIENTS IF
				// NEEDED
				GeonetworkInstance gnInstance = getGeonetworkInstanceForScope(scope);
				logger.info("set scope provider " + scope);
				ScopeProvider.instance.set(scope);
				Account account = gnInstance.getAccount();
				Version version = gnInstance.getVersion();
				String geonetworkUrl = gnInstance.getEndPoint();
				Configuration config = gnInstance.getConfig() != null ? gnInstance.getConfig() : null;

				if (account == null || account.getUser() == null || account.getPassword() == null || config == null) {
					logger.info("Loading GN instance and configurations via Geonetwork Library...");
					config = gnInstance.getGeonetworkPublisher().getConfiguration();
					account = config.getScopeConfiguration().getAccounts().get(Type.CKAN);
					version = config.getGeoNetworkVersion();
					geonetworkUrl = config.getGeoNetworkEndpoint();
				}

				logger.info("SCOPE: {}, CKAN user used is: {}, GN EndPoint: {}", scope, account.getUser(),
						geonetworkUrl);

				HTTPCallsUtils httpUtils = new HTTPCallsUtils();

				if (visibility.equals(VISIBILITY.PRV.name())) {
					if (account.getUser() != null) {
						switch (version) {
						case DUE:
							boolean authorized = GNAuthentication.login(httpUtils, geonetworkUrl, account.getUser(),
									account.getPassword());
							logger.info("Authorized on GN2 " + geonetworkUrl + " ? " + authorized);
							break;

						default:
							httpUtils = new HTTPCallsUtils(account.getUser(), account.getPassword());
							logger.info("Authorized on GN3 via HTTCallsUtils...");
							break;
						}

					} else {
						logger.warn("I'm not able to perform authentication, the user read from config with "
								+ Type.CKAN + " is null");
					}
				}

				String baseURL = remainPath == null || remainPath.isEmpty() ? geonetworkUrl + "/" + CSW_SERVER
						: geonetworkUrl + "/" + CSW_SERVER + remainPath;
				logger.info("The base URL is: " + baseURL);
				String queryString = req.getQueryString() == null || req.getQueryString().isEmpty() ? ""
						: "?" + req.getQueryString();
				gnGetlURL = baseURL + queryString;
				logger.info("Sending get request to URL: " + gnGetlURL);
				HttpResponse proxedGNResponse = httpUtils.get(gnGetlURL);

				switch (proxedGNResponse.getStatus()) {
				case HttpServletResponse.SC_OK:

					// Building the response
					InputStream streamToWrite = IOUtils.toInputStream(proxedGNResponse.getResponse());
					StreamingOutput so = new SingleFileStreamingOutput(streamToWrite);

					logger.info("Response return Content-Type: " + httpUtils.getLastContentType());

					ResponseBuilder responseBuilder = Response.ok(so).header(ConstantsResolver.CONTENT_TYPE,
							httpUtils.getLastContentType());
					return responseBuilder.build();

				case HttpServletResponse.SC_FORBIDDEN:
					throw ExceptionManager.forbiddenException(req,
							"You are not authorized to perform the request " + gnGetlURL, this.getClass(), helpURI);

				default:
					throw ExceptionManager.internalErrorException(req,
							"Sorry, an error occurred performing the geonetwork request " + gnGetlURL + " with scope "
									+ scope,
							this.getClass(), helpURI);
				}

			} catch (Exception e) {
				logger.error("Exception:", e);
				String error = "Sorry, an error occurred on resolving geonetwork request with scope " + scope
						+ ". Please, contact support!";
				throw ExceptionManager.internalErrorException(req, error, this.getClass(), helpURI);
			}

		} catch (Exception e) {

			if (!(e instanceof WebApplicationException)) {
				// UNEXPECTED EXCEPTION managing it as WebApplicationException
				String error = "Error during perform GET operation to: " + gnGetlURL + ". Please, contact the support!";
				throw ExceptionManager.internalErrorException(req, error, this.getClass(), helpURI);
			}
			// ALREADY MANAGED AS WebApplicationException
			logger.error("Exception:", e);
			throw (WebApplicationException) e;
		}

	}

	/**
	 * Submit post.
	 *
	 * @param req         the req
	 * @param scope       the scope
	 * @param mode        the mode
	 * @param visibility  the visibility
	 * @param filterKey   the filter key
	 * @param filterValue the filter value
	 * @param remainPath  the remain path
	 * @param resetCache  the reset cache
	 * @param resetScope  the reset scope
	 * @return the response
	 * @throws WebApplicationException the web application exception
	 */
	@POST
	@Path("/{" + PATH_PARAM_SCOPE + "}/{" + PATH_PARAM_MODE + "}/{" + PATH_PARAM_VISIBILITY
			+ "}/{filterKey}/{filterValue}/$${" + PATH_PARAM_REMAINPATH + ":(/[^?$]+)?}")
	public Response submitPost(@Context HttpServletRequest req, @PathParam(PATH_PARAM_SCOPE) @Nullable String scope,
			@PathParam(PATH_PARAM_MODE) @Nullable String mode,
			@PathParam(PATH_PARAM_VISIBILITY) @Nullable String visibility,
			@PathParam("filterKey") @Nullable String filterKey, @PathParam("filterValue") @Nullable String filterValue,
			@PathParam(PATH_PARAM_REMAINPATH) @Nullable String remainPath,
			@QueryParam(QUERY_PARAM_RESET_CACHE_PARAM) @Nullable String resetCache,
			@QueryParam(QUERY_PARAM_RESET_CACHED_SCOPE_PARAM) @Nullable String resetScope)
			throws WebApplicationException {

		logger.info(this.getClass().getSimpleName() + " POST starts...");
		String gnCSWlURL = null;

		try {
			logger.info(
					"Params are [mode: " + mode + ", scope: " + scope + ", visibility: " + visibility + ", filterKey: "
							+ filterKey + ", filterValue: " + filterValue + ", remainPath: " + remainPath + "]");

			if (scope == null || scope.isEmpty()) {
				logger.error("Path Parameter 'scope' not found");
				throw ExceptionManager.badRequestException(req, "Missing mandatory path parameter 'scope'",
						this.getClass(), helpURI);
			}

			if (mode == null || mode.isEmpty()) {
				logger.error("Path Parameter 'scope' not found");
				ExceptionManager.badRequestException(req, "Missing mandatory path parameter 'mode'", this.getClass(),
						helpURI);
			}

			scope = ScopeUtil.normalizeScope(scope, "|");
			mode = mode.toUpperCase();
			try {
				MODE.valueOf(mode);
			} catch (Exception e) {
				List<MODE> toPrint = Arrays.asList(MODE.values());
				logger.error(
						"The 'mode' parameter is wrong, Have you pass a valid parameter MODE like " + toPrint + "?");
				throw ExceptionManager.wrongParameterException(req, "The 'mode' parameter must be value of " + toPrint,
						this.getClass(), helpURI);
			}

			if (visibility == null) {
				logger.error("Path Parameter 'visibility' not found");
				throw ExceptionManager.badRequestException(req, "Missing mandatory path parameter 'visibility'",
						this.getClass(), helpURI);
			}

			visibility = visibility.toUpperCase();
			try {
				VISIBILITY.valueOf(visibility);
			} catch (Exception e) {
				List<VISIBILITY> toPrint = Arrays.asList(VISIBILITY.values());
				logger.error("The 'visibility' parameter is wrong, Have you pass a valid parameter VISIBILITY like "
						+ toPrint + "?");
				throw ExceptionManager.wrongParameterException(req,
						"The 'visibility' parameter must be value of " + toPrint, this.getClass(), helpURI);
			}

			// HOW TO PASS ANY FILTER?
			// TODO INVESTIGATE ON HOW TO PASS MORE THAN ONE FILTER...
			Map<String, String> filters = new HashMap<String, String>();
			if (filterKey != null && filterValue != null) {
				// IGNORING THE EMPTY FILTER 'null|null'
				if (filterKey.compareToIgnoreCase("null") != 0) {
					filters.put(filterKey, filterValue);
					logger.debug("Added filter parmas to map filters: " + filters);
				}
			}

			try {

				// I'M LOADING GN CONFIGURATIONS (ENDPOINT, USER, PWD AND SO ON..) FOR PASSED
				// SCOPE FROM GN LIBRARY BY A GENERAL METHOD WITHOUT TO PERFORM AUTHENTICATION
				// ON GN,
				// AFTER THAT I'M USING THEM TO PERFORM AUTHENTICATION ON GN VIA HTTP_CLIENTS IF
				// NEEDED
				GeonetworkInstance gnInstance = getGeonetworkInstanceForScope(scope);
				logger.info("set scope provider " + scope);
				ScopeProvider.instance.set(scope);
				Account account = gnInstance.getAccount();
				Version version = gnInstance.getVersion();
				String geonetworkUrl = gnInstance.getEndPoint();
				Configuration config = gnInstance.getConfig() != null ? gnInstance.getConfig() : null;

				if (account == null || account.getUser() == null || account.getPassword() == null || config == null) {
					logger.info("Loading GN instance and configurations via Geonetwork Library...");
					config = gnInstance.getGeonetworkPublisher().getConfiguration();
					account = config.getScopeConfiguration().getAccounts().get(Type.CKAN);
					version = config.getGeoNetworkVersion();
					geonetworkUrl = config.getGeoNetworkEndpoint();
				}
				logger.info("SCOPE: {}, CKAN user used is: {}, GN EndPoint: {}", scope, account.getUser(),
						geonetworkUrl);

				// logger.info("Parameters..");
				// for (Enumeration<String> e = req.getParameterNames(); e.hasMoreElements();){
				// String p = e.nextElement();
				// logger.debug("param "+p + " value
				// "+Arrays.toString(req.getParameterValues(p)));
				// }

				// DEBUG BODY
				// String readBody = IOUtils.toString(req.getReader());
				// logger.debug("doPost read body request: "+readBody);
				ByteArrayOutputStream byteArray = new ByteArrayOutputStream();

				// SPECIFIC HANDLER FOR GEONETWORK REQUEST: /srv/en/mef.export
				if (remainPath != null && remainPath.compareTo(SRV_EN_MEF_EXPORT) == 0) {
					logger.info("In case of mef.export, perfoming a custom handler");
					gnCSWlURL = geonetworkUrl + SRV_EN_MEF_EXPORT;
					String[] uuidValues = req.getParameterValues(UUID);
					if (uuidValues != null) {
						String data = null;
						for (String uuid : uuidValues) {
							data = UUID + "=" + uuid;
						}
						if (data != null) {
							logger.debug("Writing " + data + " into byte array");
							byteArray.write(data.getBytes());
						} else
							IOUtils.copy(req.getInputStream(), byteArray);
					} else
						IOUtils.copy(req.getInputStream(), byteArray);
				} else {
					logger.debug("IS NOT A REQUEST TO " + SRV_EN_MEF_EXPORT);
					gnCSWlURL = remainPath == null || remainPath.isEmpty() ? geonetworkUrl + "/" + CSW_SERVER
							: geonetworkUrl + "/" + CSW_SERVER + remainPath;
					IOUtils.copy(req.getInputStream(), byteArray);
				}

				HTTPCallsUtils httpUtils = new HTTPCallsUtils();

				// PRIVATE LAYERS
				if (visibility.equals(VISIBILITY.PRV.name())) {
					logger.info("Visibility: " + VISIBILITY.PRV + " getting private layers..");
					// VRE LAYERS
					if (mode.equals(MODE.VRE.name())) {
						logger.info("Getting " + MODE.VRE + " layers..");
						// HARVESTED LAYERS
					} else {
						filters.put("isHarvested", "y");
						logger.info("Getting " + MODE.HARVEST + " layers, I added 'isHarvested = y' to the filters ["
								+ filters + "]");
					}

					if (account.getUser() != null) {
						switch (version) {
						case DUE:
							boolean authorized = GNAuthentication.login(httpUtils, geonetworkUrl, account.getUser(),
									account.getPassword());
							logger.info("Authorized on GN2 " + geonetworkUrl + " ? " + authorized);
							break;

						default:
							httpUtils = new HTTPCallsUtils(account.getUser(), account.getPassword());
							logger.info("Authorized on GN3 via HTTCallsUtils...");
							break;
						}

					} else {
						logger.warn("I'm not able to perform authentication, the user read from config with "
								+ Type.CKAN + " is null");
					}

					// PUBLIC LAYERS
				} else {
					logger.info("Visibility: " + VISIBILITY.PUB + " getting public layers..");
					// VRE LAYERS
					if (mode.equals(MODE.VRE.name())) {
						logger.info("Getting " + MODE.VRE + " layers, the VRE account: " + account.getUser()
								+ " will be used as owner user for filtering... Is it right?");
						filters.put("ownername", account.getUser());
						// HARVESTED LAYERS
					} else {
						// filters.put("isHarvested", "y");
						logger.info("Getting " + MODE.HARVEST + " layers, I'm applying the filters [" + filters + "]");
					}
				}

				logger.info("Sending CSW POST request to URL: " + gnCSWlURL);
				logger.debug("Content-Type: " + req.getContentType());

				// DEBUG
				// logger.debug("POST - BODY : "+byteArray.toString());
				InputStream in = httpUtils.post(gnCSWlURL, new ByteArrayInputStream(byteArray.toByteArray()),
						req.getContentType(), req.getParameterMap());

				if (in == null) {
					logger.warn("Input stream returned is null, sending " + HttpServletResponse.SC_NOT_FOUND);
					throw ExceptionManager.notFoundException(req,
							"Input stream is null to the request " + gnCSWlURL + " with body: " + byteArray.toString(),
							this.getClass(), helpURI);
				}

				try {

					ReusableInputStream reus = new ReusableInputStream(in);

					if (visibility.equals(VISIBILITY.PRV.name())) {
						logger.info(
								"Private VISIBILITY requested, retrieving public file identifiers to apply filtering..");
						FilterGetRecords filterGetRecords = new FilterGetRecords(byteArray.toString(), geonetworkUrl);
						if (filterGetRecords.getFoundPublicIds() != null
								&& filterGetRecords.getFoundPublicIds().size() > 0) {
							logger.info("I'm removing list of public IDs with "
									+ filterGetRecords.getFoundPublicIds().size() + " item/s. Is it right?");
							in = GetResponseRecordFilter.overrideResponseIdsByListIds(reus,
									filterGetRecords.getFoundPublicIds(), REPLACED_A_PUBLIC_UUID_PLEASE_IGNORE);
						}
					}

					if (filters.size() > 0) {
						logger.info("Applying filtering on geonet:info... filter/s used: " + filters);
						Document doc = GetResponseRecordFilter.inputStreamToW3CDocument(reus);
						List<String> fileIdentifiers = GetResponseRecordFilter.getTextContentStringsForTagName(doc,
								"gmd:fileIdentifier");
						List<String> noMatchingFilter = new ArrayList<String>();
						for (String fileId : fileIdentifiers) {

							// CKECKING THE FILTERS
							for (String fkey : filters.keySet()) {
								String value = GetResponseRecordFilter.getMetadataValueByFileIdentifier(fileId,
										config.getGeoNetworkEndpoint(), config.getAdminAccount().getUser(),
										config.getAdminAccount().getPassword(), fkey);
								// String own = GetResponseRecordFilter.getMetaOwnerNameByFileIdentifier(fileId,
								// config.getGeoNetworkEndpoint(),config.getAdminAccount().getUser(),
								// config.getAdminAccount().getPassword());
								String fValue = filters.get(fkey);
								// Either the filter KEY doesn't matching any geonet:info (value==null)
								// or the value of filterKey in geonet:info doesn't matching the passed
								// filterValue (value.compareTo(fValue)!=0)
								if (value == null || value.compareTo(fValue) != 0) {
									logger.trace(fkey + " of File Identifier " + fileId + " not matching the filter: "
											+ fkey + " with value: " + fValue
											+ ", adding it to list to remove file identifier and exit from loop..");
									noMatchingFilter.add(fileId);
									// WHEN I ADD THE FILE IDENTIFIER TO FILTERED ID, I CAN EXIT FROM CKECKING
									// FILTERS LOOP
									break;
								}
							}
						}

						if (noMatchingFilter.size() > 0) {
							logger.info("Removing " + noMatchingFilter.size()
									+ " layer/s that not macthing the filters: " + filters);
							// Document doc2 = GetResponseRecordFilter.inputStreamToW3CDocument(reus);
							in = GetResponseRecordFilter.overrideResponseIdsByListIds(reus, noMatchingFilter,
									REPLACED_UUID_BY_FILTER_PLEASE_IGNORE);
							// in = GetResponseRecordFilter.w3CDocumentToInputStream(doc);

						} else {
							logger.info("No replace on UUIDs was applied from filters: " + filters);
							in = reus;
						}

					}

					ReusableInputStream reusIs = new ReusableInputStream(in);

					// END DEBUG
					logger.info("Response return Content-Type: " + httpUtils.getLastContentType());
					return Response.ok(reusIs)
							// .header(ConstantsResolver.CONTENT_DISPOSITION,"attachment; filename =
							// \""+fileName+"\"")
							.header(ConstantsResolver.CONTENT_TYPE, httpUtils.getLastContentType()).build();

				} catch (Exception e) {
					logger.error("Error on copy the response to send to client: ", e);
					throw ExceptionManager.internalErrorException(req, "Error on copy the response!", this.getClass(),
							helpURI);
				} finally {
					IOUtils.closeQuietly(in);
				}

			} catch (IllegalArgumentException e) {
				logger.error("IllegalArgumentException:", e);
				throw ExceptionManager.badRequestException(req, "Illegal argument to carry out the request!",
						this.getClass(), helpURI);

			} catch (Exception e) {
				logger.error("Exception:", e);
				String error = "Sorry, an error occurred on resolving geonetwork request with scope " + scope
						+ ". Please, contact support!";
				throw ExceptionManager.internalErrorException(req, error, this.getClass(), helpURI);
			}

		} catch (Exception e) {

			if (!(e instanceof WebApplicationException)) {
				// UNEXPECTED EXCEPTION managing it as WebApplicationException
				String error = "Error during perform POST operation to: " + gnCSWlURL
						+ ". Please, contact the support!";
				if (e.getCause() != null)
					error += "\n\nCaused: " + e.getCause().getMessage();
				throw ExceptionManager.internalErrorException(req, error, this.getClass(), helpURI);
			}
			// ALREADY MANAGED AS WebApplicationException
			logger.error("Exception:", e);
			throw (WebApplicationException) e;
		}

	}

	/**
	 * Gets the geonetwork instance for scope.
	 *
	 * @param scope the scope
	 * @return the geonetwork instance for scope
	 * @throws Exception the exception
	 */
	protected GeonetworkInstance getGeonetworkInstanceForScope(String scope) throws Exception {

		logger.info("Trying to read the {} from cache for scope: {}", GeonetworkInstance.class.getSimpleName(), scope);
		GeonetworkInstance geoInstance;
		try {
			geoInstance = LoadingGeonetworkInstanceCache.get(scope);
		} catch (Exception e) {
			logger.error("An error occurred on reading GeonetworkInstance for scope " + scope, e);
			throw new Exception("Sorry, An error occurred on reading GeonetworkInstance for scope " + scope);
		}
		return geoInstance;

	}

}