/**
 *
 */
package org.gcube.portlets.user.workspaceexplorerapp.server;

import javax.servlet.http.HttpSession;

import org.gcube.common.storagehubwrapper.server.StorageHubWrapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

// TODO: Auto-generated Javadoc
/**
 * The Class WsUtil.
 *
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it Sep 13, 2016
 */
public class WsUtil {

	public static final Logger logger = LoggerFactory.getLogger(WsUtil.class);
	public static final String ENVIRONMENT_VARIABLE_SCOPE_NAME = "EnvironmentVariableScope";
	public static final String SESSION_SCOPE = "session_scope";

	/**
	 * Gets the storage hub wrapper.
	 *
	 * @param httpSession the http session
	 * @return the storage hub wrapper
	 * @throws Exception the exception
	 */
	public static StorageHubWrapper getStorageHubWrapper(HttpSession httpSession) throws Exception {

		try {
			String scope = getScope(httpSession);
			// TODO
			String token = "MUST BE PROVIDED";
			logger.debug("Getting " + StorageHubWrapper.class.getSimpleName() + 
					" by token: " + token.substring(0, 10) +" MASKED TOKEN" + 
					" by using the scope: " + scope);

			return new StorageHubWrapper(scope, token, false, false, true);
		} catch (Exception e) {
			logger.error("Error during getting storageHub wrapper", e);
			throw new Exception("Error on inizializing the StorageHub");
		}
	}
	
	
	/**
	 * Gets the workpace.
	 *
	 * @param httpSession the http session
	 * @return the workpace
	 * @throws Exception the exception
	 */
	public static org.gcube.common.storagehubwrapper.server.tohl.Workspace getWorkspace(HttpSession httpSession) throws Exception {

		try {
			StorageHubWrapper wrapper = getStorageHubWrapper(httpSession);
			return wrapper.getWorkspace();
		} catch (Exception e) {
			logger.error("Error on getting the Workspace", e);
			throw new Exception("Error on getting the Workspace");
		}
	}

//	/**
//	 * Gets the workspace.
//	 *
//	 * @param httpSession the http session
//	 * @return the workspace
//	 * @throws InternalErrorException           the internal error exception
//	 * @throws HomeNotFoundException            the home not found exception
//	 * @throws WorkspaceFolderNotFoundException the workspace folder not found
//	 *                                          exception
//	 * @throws UserNotFoundException            the user not found exception
//	 */
//	public static Workspace getWorkspace(HttpSession httpSession) throws InternalErrorException, HomeNotFoundException,
//			WorkspaceFolderNotFoundException, UserNotFoundException {
////		ASLSession session = getASLSession(httpSession);
//
//		String scope = getScope(httpSession);
//		// GET CONTEXT
//		logger.info("Setting scope: " + scope);
//		ScopeProvider.instance.set(scope);
//		return HomeLibrary.getHomeManagerFactory().getHomeManager().getGuestLogin().getWorkspace();
//	}

	/**
	 * Gets the scope.
	 *
	 * @param httpSession the http session
	 * @return the scope
	 */
	public static String getScope(HttpSession httpSession) {
		String scope = (String) httpSession.getAttribute(SESSION_SCOPE);
		logger.info("Variable " + SESSION_SCOPE + " read from httpsession is: " + scope);

		if (scope == null) {
			logger.info("Variable " + SESSION_SCOPE + " is null reading from web.xml context");
			String variableScopeName = httpSession.getServletContext()
					.getInitParameter(ENVIRONMENT_VARIABLE_SCOPE_NAME);
			logger.info("Found param-value '" + variableScopeName
					+ "' from web context, reading its value from ENVIRONMENT");
			scope = System.getenv(variableScopeName);
			logger.info("Value of " + variableScopeName + " from ENVIRONMENT is: " + scope);
		}

		httpSession.setAttribute(ENVIRONMENT_VARIABLE_SCOPE_NAME, scope);
		return scope;
	}
}