package org.gcube.portlets.widgets.wstaskexecutor.server;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.gcube.common.portal.PortalContext;
import org.gcube.common.workspacetaskexecutor.dataminer.WorkspaceDataMinerTaskExecutor;
import org.gcube.common.workspacetaskexecutor.shared.dataminer.TaskConfiguration;
import org.gcube.common.workspacetaskexecutor.shared.exception.ItemNotConfiguredException;
import org.gcube.common.workspacetaskexecutor.shared.exception.WorkspaceFolderLocked;
import org.gcube.common.workspacetaskexecutor.util.EncrypterUtil;
import org.gcube.portlets.widgets.wstaskexecutor.client.rpc.WsTaskExecutorWidgetService;
import org.gcube.portlets.widgets.wstaskexecutor.server.util.PortalContextUtil;
import org.gcube.portlets.widgets.wstaskexecutor.shared.GcubeScope;
import org.gcube.portlets.widgets.wstaskexecutor.shared.GcubeScopeType;
import org.gcube.vomanagement.usermanagement.GroupManager;
import org.gcube.vomanagement.usermanagement.exception.GroupRetrievalFault;
import org.gcube.vomanagement.usermanagement.exception.UserManagementSystemException;
import org.gcube.vomanagement.usermanagement.exception.UserRetrievalFault;
import org.gcube.vomanagement.usermanagement.impl.LiferayGroupManager;
import org.gcube.vomanagement.usermanagement.model.GCubeGroup;
import org.gcube.vomanagement.usermanagement.model.GCubeUser;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.gwt.user.server.rpc.RemoteServiceServlet;
import com.liferay.portal.service.UserLocalServiceUtil;

/**
 * The server side implementation of the RPC service.
 *
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * May 4, 2018
 */
@SuppressWarnings("serial")
public class WsTaskExecutorWidgetServiceImpl extends RemoteServiceServlet implements
    WsTaskExecutorWidgetService {

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

	/**
	 * Checks if is within portal.
	 *
	 * @return true if you're running into the portal, false if in development
	 */
	public static boolean isWithinPortal() {
		try {
			UserLocalServiceUtil.getService();
			return true;
		}
		catch (Exception ex) {
			logger.info("Development Mode ON");
			return false;
		}
	}

	/**
	 * Gets the task executor.
	 *
	 * @return the task executor
	 */
	private WorkspaceDataMinerTaskExecutor getTaskExecutor(){

		GCubeUser user = PortalContextUtil.getUserLogged(this.getThreadLocalRequest());
		WorkspaceDataMinerTaskExecutor exec =  WorkspaceDataMinerTaskExecutor.getInstance();
		exec.withOwner(user.getUsername());
		return exec;
	}

	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wstaskexecutor.client.GreetingService#getListOfScopesForLoggedUser()
	 */
	@Override
	public List<GcubeScope> getListOfScopesForLoggedUser()
		throws Exception {

		logger.debug("getListOfVREsForLoggedUser...: ");
		GCubeUser user = PortalContext.getConfiguration().getCurrentUser(this.getThreadLocalRequest());
		long userId = user.getUserId();

		// Instanciate the manager
		GroupManager groupManager = new LiferayGroupManager();
		List<GcubeScope> listOfScopes = new ArrayList<GcubeScope>();

		if (!isWithinPortal()){
			listOfScopes.add(new GcubeScope("devVRE", "/gcube/devsec/devVRE", GcubeScopeType.VRE));
			listOfScopes.add(new GcubeScope("NextNext", "/gcube/devNext/NextNext", GcubeScopeType.VRE));
			listOfScopes.add(new GcubeScope("devNext", "/gcube/devNext", GcubeScopeType.VO));
			listOfScopes.add(new GcubeScope("devsec", "/gcube/devsec", GcubeScopeType.VO));
			listOfScopes.add(new GcubeScope("gcube", "/gcube", GcubeScopeType.ROOT));
			Collections.sort(listOfScopes);
			return listOfScopes;
		}

		try {

			List<GCubeGroup> listOfGroups = groupManager.listGroupsByUser(userId);
			for (GCubeGroup gCubeGroup : listOfGroups) {
				GcubeScopeType scopeType=null;
				if(groupManager.isVRE(gCubeGroup.getGroupId())){
					scopeType =  GcubeScopeType.VRE;
				}
//				else if(groupManager.isVO(gCubeGroup.getGroupId())){
//					scopeType =  GcubeScopeType.VO;
//				}
//				}else if(groupManager.isRootVO(gCubeGroup.getGroupId())){
//					scopeType =  GcubeScopeType.ROOT;
//				}

				if(scopeType!=null){
					GcubeScope gcubeVRE = new GcubeScope(gCubeGroup.getGroupName(), groupManager.getInfrastructureScope(gCubeGroup.getGroupId()), scopeType);
					listOfScopes.add(gcubeVRE);
				}

			}

			//ADDING THE ROOT SCOPE
//			String infraName = PortalContext.getConfiguration().getInfrastructureName();
//			GcubeScope gcubeRoot = new GcubeScope(infraName, "/"+infraName, GcubeScopeType.ROOT);
//			listOfScopes.add(gcubeRoot);

		}
		catch (UserRetrievalFault | UserManagementSystemException
						| GroupRetrievalFault e) {
			logger.error("Error occurred server-side getting VRE folders: ", e);
			throw new Exception("Sorry, an error occurred server-side getting VRE folders, try again later");
		}

		Collections.sort(listOfScopes);
		logger.info("Returning list of VREs: "+listOfScopes);
		return listOfScopes;
	}





	/**
	 * Creates the task configuration.
	 *
	 * @param workspaceItemId the workspace item id
	 * @param taskConfiguration the task configuration
	 * @return the task configuration
	 * @throws Exception the exception
	 */
	public TaskConfiguration createTaskConfiguration(String workspaceItemId, TaskConfiguration taskConfiguration) throws Exception{

		WorkspaceDataMinerTaskExecutor exec = getTaskExecutor();
		taskConfiguration = setMaskedToken(taskConfiguration);
		exec.setTaskConfiguration(taskConfiguration);

		return taskConfiguration;
	}

	/**
	 * Check item task configurations.
	 *
	 * @param itemId the item id
	 * @return the list
	 * @throws Exception
	 */
	@Override
	public List<TaskConfiguration> checkItemTaskConfigurations(String itemId) throws Exception {

		WorkspaceDataMinerTaskExecutor exec =  WorkspaceDataMinerTaskExecutor.getInstance();
		List<TaskConfiguration> confs = null;
		try {
			confs = exec.checkItemConfigurations(itemId);
		}
		catch (ItemNotConfiguredException e){
			String msg = "No TaskConfiguration found for itemId: "+itemId+", retuning null";
			logger.info(msg);
			throw e;
		}catch (WorkspaceFolderLocked e) {
			logger.info(e.getMessage());
			throw e;

		}catch (Exception e) {
			logger.error("Error on checking TaskConfigurations for itemId: "+itemId,e);
			throw new Exception("Error occurred during checking Task Configurations for id: "+itemId+ ". Refresh and try again later");
		}

		logger.debug("Returning configurations: "+confs);

		return confs;
	}


	/**
	 * Sets the masked token.
	 *
	 * @param taskConfiguration the task configuration
	 * @return the task configuration
	 * @throws Exception the exception
	 */
	private TaskConfiguration setMaskedToken(TaskConfiguration taskConfiguration) throws Exception{

		String scope = taskConfiguration.getScope();
		if(scope==null)
			throw new Exception("Missing scope in the input configuration. Set it and try again");

		GCubeUser user = PortalContextUtil.getUserLogged(this.getThreadLocalRequest());
		String token = PortalContextUtil.getTokenFor(scope, user.getUsername());
		taskConfiguration.setMaskedToken(EncrypterUtil.encryptString(token));

		return taskConfiguration;

	}





}