///**
// *
// */
//package org.gcube.datatransfer.resolver;
//
//import java.io.IOException;
//import java.util.HashSet;
//import java.util.Set;
//
//import javax.servlet.Filter;
//import javax.servlet.FilterChain;
//import javax.servlet.FilterConfig;
//import javax.servlet.ServletException;
//import javax.servlet.ServletRequest;
//import javax.servlet.ServletResponse;
//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;
//
//import org.gcube.datatransfer.resolver.catalogue.CatalogueRequestParameter;
//import org.gcube.datatransfer.resolver.catalogue.UrlEncoderUtil;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
//
//
//
///**
// * The Class UriResolverRewriteFilter.
// *
// * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
// * Dec 5, 2016
// */
//public class UriResolverRewriteFilter implements Filter{
//
//	/**
//	 *
//	 */
//	public static final String SERVLET_URI_RESOLVER = "/uri-resolver";
//
//	private static final String PATH_SEPARATOR = "/";
//	public static final String SERVLET_GEONETWORK = "/geonetwork";
//	public static final String REQUEST_PARAMETER_SEPARATOR = "#";
//
//	public static final String PARAMETER_SMP_ID = "smp-id";
//	public static final String SERVLET_STORAGE_ID = "id";
//
//	public static final String PARAMETER_ENC_CATALOGUE_LINK = "cl";
//	public static final String PARAMETER_DIRECT_CATALOGUE_LINK = "dl";
//	public static final String SERVLET_CATALOGUE = "/catalogue";
//
//	protected static final Logger logger = LoggerFactory.getLogger(UriResolverRewriteFilter.class);
//	private FilterConfig config;
//
//	private static final Set<String> resourceCataloguesCodes = new HashSet<String>(ResourceCatalogueCodes.codes());
//
//	//private ApplicationProfileReaderForCatalogueResolver appPrfCatResolver = new ApplicationProfileReaderForCatalogueResolver(scope, useRootScope)
//
//	/**
//	 * Gets the config.
//	 *
//	 * @return the config
//	 */
//	public FilterConfig getConfig() {
//
//		return config;
//	}
//
//	/* (non-Javadoc)
//	 * @see javax.servlet.Filter#destroy()
//	 */
//	@Override
//	public void destroy() {
//		  logger.trace("run destroy");
//	}
//
//
//	/* (non-Javadoc)
//	 * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
//	 */
//	@Override
//	public void doFilter(ServletRequest req, ServletResponse response, FilterChain chain) throws IOException, ServletException {
//		/* wrap the request in order to read the inputstream multiple times */
//	    MultiReadHttpServletRequest multiReadRequest = new MultiReadHttpServletRequest((HttpServletRequest) req);
//		String requestURI = multiReadRequest.getRequestURI();
//		String queryString = multiReadRequest.getQueryString();
//		String servletPath = multiReadRequest.getServletPath();
//		logger.debug("Request URI: " + requestURI + ", QueryString: " +queryString+ ", Servlet path: "+servletPath);
//
//		try{
//			//IS A REQUEST FOR GEONETWORK AUTHENTICATION? (CKAN HARVESTING?)
//			if(servletPath.startsWith(SERVLET_GEONETWORK) || servletPath.startsWith(SERVLET_URI_RESOLVER+SERVLET_GEONETWORK)){
//				logger.debug("It is a request to geonetwork");
//				GeonetworkRequestDecoder grd = new GeonetworkRequestDecoder(servletPath, queryString);
//				logger.debug("forward to: "+grd.getGeonetworkResolverURIRequest());
//				multiReadRequest.getRequestDispatcher(grd.getGeonetworkResolverURIRequest()).forward(multiReadRequest, response);
//
//			}else{
//					logger.debug("checking if it is a request to catologue...");
//					boolean isCatalogueServletReference = servletPath.startsWith(SERVLET_CATALOGUE);
//
//					String idCodeCatalogue = null;
//					boolean isIdCodeCatalogue = false;
//					String splittedServletPath[] = servletPath.split(PATH_SEPARATOR);
//					if(!isCatalogueServletReference){
//						idCodeCatalogue = splittedServletPath[1];
//						logger.trace("checking if the code: "+idCodeCatalogue+" belongs to a catalogue code");
//						isIdCodeCatalogue = resourceCataloguesCodes.contains(idCodeCatalogue);
//						logger.debug("\tIs it a catalogue code? "+isIdCodeCatalogue);
//					}
//
//					if(isCatalogueServletReference || isIdCodeCatalogue){
//
//						//int startIndex = requestURI.indexOf(SERVLET_CATALOGUE))+SERVLET_CATALOGUE.length();
//						//String vreName = requestURI.substring(beginIndex)
//						HttpServletRequest request = (HttpServletRequest) req;
//						logger.trace("method is: "+request.getMethod());
//
//						if(request.getMethod().compareToIgnoreCase("POST")==0){
//							logger.debug("Managing as Catalogue POST request..");
//							logger.debug("forward to: " + SERVLET_CATALOGUE);
//							multiReadRequest.getRequestDispatcher(SERVLET_CATALOGUE).forward(multiReadRequest, response);
//						}else{
//							logger.debug("Managing as Catalogue GET request..");
//							String newURI = SERVLET_CATALOGUE;
//							//String[] pathSplit = newServletPath.split(PATH_SEPARATOR);
//							if(isIdCodeCatalogue){
//								//TO BUILD A COMPLETE URL
//	//							logger.debug("is a catalogue code, rebuilding complete url...");
//	//							ResourceCatalogueCodes rcc = ResourceCatalogueCodes.valueOfId(idCodeCatalogue);
//	//							newServletPath = SERVLET_CATALOGUE+splittedServletPath[2]+PATH_SEPARATOR+rcc.getValue()+PATH_SEPARATOR+splittedServletPath[3];
//	//							logger.debug("rebuilded complete url: "+newServletPath);
//								logger.debug("is a catalogue code, resolving a short url in clear ...");
//								ResourceCatalogueCodes rcc = ResourceCatalogueCodes.valueOfCodeId(idCodeCatalogue);
//								logger.debug("found VRE name: "+splittedServletPath[2]);
//								String gcubeScope = CatalogueRequestParameter.GCUBE_SCOPE.getKey() +"="+splittedServletPath[2];
//								String eC = CatalogueRequestParameter.ENTITY_CONTEXT.getKey() +"="+rcc.getValue();
//								logger.debug("found id code: "+idCodeCatalogue+", resolving it with context name: "+eC);
//								String eN = CatalogueRequestParameter.ENTITY_NAME.getKey() +"="+splittedServletPath[3];
//								logger.debug("found entity name: "+eN);
//								String encodedQuery = UrlEncoderUtil.encodeQuery(gcubeScope,eC,eN);
//								newURI+=  "?" + PARAMETER_DIRECT_CATALOGUE_LINK + "=" + encodedQuery;
//							}else
//								if(splittedServletPath.length==5){
//									logger.info("resolving a complete URL in clear...");
//									logger.debug("found VRE name: "+splittedServletPath[2]);
//									String gcubeScope = CatalogueRequestParameter.GCUBE_SCOPE.getKey() +"="+splittedServletPath[2];
//									String eC = CatalogueRequestParameter.ENTITY_CONTEXT.getKey() +"="+splittedServletPath[3];
//									logger.debug("found context name: "+eC);
//									String eN = CatalogueRequestParameter.ENTITY_NAME.getKey() +"="+splittedServletPath[4];
//									logger.debug("found entity name: "+eN);
//									String encodedQuery = UrlEncoderUtil.encodeQuery(gcubeScope,eC,eN);
//									newURI+=  "?" + PARAMETER_DIRECT_CATALOGUE_LINK + "=" + encodedQuery;
//							}else{
//
//								logger.info("Resolving an encrypted URL to catalogue...");
//								int lastSlash = requestURI.lastIndexOf(PATH_SEPARATOR);
//								String toCatalogueLink = requestURI.substring(lastSlash + 1, requestURI.length());
//								newURI+=  "?" + PARAMETER_ENC_CATALOGUE_LINK + "=" + toCatalogueLink;
//							}
//
//							logger.debug("forward to: " + newURI);
//							multiReadRequest.getRequestDispatcher(newURI).forward(multiReadRequest, response);
//						}
//
//					//chain.doFilter(multiReadRequest, response);
//				}else{
//					logger.debug("It is a request to workspace/storage");
//					//LAST CASE, IS WORKSPACE REQUEST?
//					if (queryString == null) { // IS A /XXXXX
//						logger.debug("QueryString is null, is It a new SMP public uri by ID?");
//						int lastSlash = requestURI.lastIndexOf(PATH_SEPARATOR);
//						if (lastSlash + 1 == requestURI.length()) {
//							logger.debug("'/' is last index, doFilter Request");
//							// req.getRequestDispatcher("/").forward(req, res);
//							chain.doFilter(multiReadRequest, response);
//						}
//						else {
//							String toStorageID = requestURI.substring(lastSlash + 1, requestURI.length());
//							// String newURI = requestURI.replace(toReplace,
//							// SERVLET_RESOLVER_BY_ID+"?"+SMP_ID+"="+toReplace);
//							String newURI = SERVLET_STORAGE_ID + "?" + PARAMETER_SMP_ID + "=" + toStorageID;
//							logger.debug("forward to: " + newURI);
//							multiReadRequest.getRequestDispatcher(newURI).forward(multiReadRequest, response);
//						}
//					}
//					else {
//						logger.debug("It is NOT a SMP public uri by ID, doFilter Request");
//						chain.doFilter(multiReadRequest, response);
//					}
//				}
//
//			}
//		}catch(BadRequestException bre){
//			if (response instanceof HttpServletResponse){
//				HttpServletResponse httpResponse = (HttpServletResponse) response;
//				httpResponse.sendError(HttpServletResponse.SC_BAD_REQUEST, bre.getMessage());
//			}
//		}
//	}
//
//
//	/**
//	 * Gets the scope.
//	 *
//	 * @param scope the scope
//	 * @return the scope
//	 */
//	private static String getScope(String scope){
//		logger.debug("Read scope path: "+scope);
////		String scope = servletPath.substring(servletPath.indexOf("/"), servletPath.length());
//		return PATH_SEPARATOR+scope.replaceAll("_", PATH_SEPARATOR);
//	}
//
//	/* (non-Javadoc)
//	 * @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
//	 */
//	@Override
//	public void init(FilterConfig config) throws ServletException {
//		 logger.trace("run init");
//		 this.config = config;
//	}
//
//	/*public static void main(String[] args) {
//
//		String split = "/catalogue/NextNext/dataset/sarda-sarda";
//
//		String[] array = split.split("/");
//
//		System.out.println(array.length);
//
//		for (int i = 0; i < array.length; i++) {
//			System.out.println(i+" "+array[i]);
//		}
//
//		System.out.println(array[2]);
//
//	}*/
//}