package org.gcube.portlets.widgets.wsexplorer.server.stohub;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.gcube.common.authorization.library.provider.SecurityTokenProvider;
import org.gcube.common.portal.PortalContext;
import org.gcube.common.scope.api.ScopeProvider;
import org.gcube.common.storagehub.client.plugins.AbstractPlugin;
import org.gcube.common.storagehub.client.proxies.ItemManagerClient;
import org.gcube.common.storagehub.client.proxies.WorkspaceManagerClient;
import org.gcube.common.storagehub.model.acls.ACL;
import org.gcube.common.storagehub.model.items.FolderItem;
import org.gcube.common.storagehub.model.items.Item;
import org.gcube.common.storagehub.model.items.SharedFolder;

import com.liferay.portal.kernel.log.Log;
import com.liferay.portal.kernel.log.LogFactoryUtil;


public class StorageHubServiceUtil {
	private static Log _log = LogFactoryUtil.getLog(StorageHubServiceUtil.class);
	public static final String ACCOUNTING_HL_NODE_NAME = "hl:accounting";

	public static Item getRoot(HttpServletRequest request) {
		PortalContext pContext = PortalContext.getConfiguration();
		String userName = pContext.getCurrentUser(request).getUsername();
		String scope = pContext.getCurrentScope(request);
		String authorizationToken = pContext.getCurrentUserToken(scope, userName);
		ScopeProvider.instance.set(scope);
		SecurityTokenProvider.instance.set(authorizationToken);
		WorkspaceManagerClient client = AbstractPlugin.workspace().build();
		Item itemRoot = client.getWorkspace(ACCOUNTING_HL_NODE_NAME);
		return itemRoot;
	}

	public static Item getItem(HttpServletRequest request, String itemId) {
		PortalContext pContext = PortalContext.getConfiguration();
		String userName = pContext.getCurrentUser(request).getUsername();
		String scope = pContext.getCurrentScope(request);
		String authorizationToken = pContext.getCurrentUserToken(scope, userName);
		ScopeProvider.instance.set(scope);
		SecurityTokenProvider.instance.set(authorizationToken);
		ItemManagerClient client = AbstractPlugin.item().build();
		Item toReturn = client.get(itemId, ACCOUNTING_HL_NODE_NAME);
		return toReturn;
	}

	public static List<? extends Item> getParents(HttpServletRequest request, String itemId) {
		PortalContext pContext = PortalContext.getConfiguration();
		String userName = pContext.getCurrentUser(request).getUsername();
		String scope = pContext.getCurrentScope(request);
		String authorizationToken = pContext.getCurrentUserToken(scope, userName);
		ScopeProvider.instance.set(scope);
		SecurityTokenProvider.instance.set(authorizationToken);
		ItemManagerClient client = AbstractPlugin.item().build();
		List<? extends Item> toReturn = client.getAnchestors(itemId, ACCOUNTING_HL_NODE_NAME);
		return toReturn;
	}
	
	public static FolderItem createFolder(HttpServletRequest request, String parentId, String name, String description) {
		PortalContext pContext = PortalContext.getConfiguration();
		String userName = pContext.getCurrentUser(request).getUsername();
		String scope = pContext.getCurrentScope(request);
		String authorizationToken = pContext.getCurrentUserToken(scope, userName);
		ScopeProvider.instance.set(scope);
		SecurityTokenProvider.instance.set(authorizationToken);
		ItemManagerClient client = AbstractPlugin.item().build();
		String createdFolderId = client.createFolder(parentId, name, description);
		return (FolderItem) client.get(createdFolderId, ACCOUNTING_HL_NODE_NAME);
	}

	/**
	 * 
	 * @param request
	 * @return the VRE Folders Id
	 */
	public static String getVREFoldersId(HttpServletRequest request) {
		PortalContext pContext = PortalContext.getConfiguration();
		String userName = pContext.getCurrentUser(request).getUsername();
		String scope = pContext.getCurrentScope(request);
		String authorizationToken = pContext.getCurrentUserToken(scope, userName);
		ScopeProvider.instance.set(scope);
		SecurityTokenProvider.instance.set(authorizationToken);
		String toReturn = "";
		try {
			WorkspaceManagerClient wsclient = AbstractPlugin.workspace().build();
			try {
				List<? extends Item> list = wsclient.getVreFolders("hl:accounting");
				toReturn =list.iterator().next().getParentId();
			} catch (Exception e) {
				_log.info("This user has no VRE Folders", e);
				return null;
			}			
		}catch (Exception e) {
			e.printStackTrace();
		}
		return toReturn;
	}


	public static String getUserACLForFolderId(HttpServletRequest request, String folderId) {
		PortalContext pContext = PortalContext.getConfiguration();
		String userName = pContext.getCurrentUser(request).getUsername();
		String scope = pContext.getCurrentScope(request);
		String authorizationToken = pContext.getCurrentUserToken(scope, userName);
		ScopeProvider.instance.set(scope);
		SecurityTokenProvider.instance.set(authorizationToken);

		Item theFolder = getItem(request, folderId);
		if (!theFolder.isShared()) {
			return "OWNER";
		} else {
			ItemManagerClient client = AbstractPlugin.item().build();
			List<ACL> acls = client.getACL(folderId);
			SharedFolder sharedFolder = (SharedFolder) theFolder;
	        
			boolean found = false; //this is needed because in case o VRE Foder the permission is assigned ot the group and not to the user.
			for (ACL acl : acls) {
				if (acl.getPricipal().compareTo(userName) == 0) {
					found = true;
					return acl.getAccessTypes().get(0).toString();
				}
			}
			if (!found && sharedFolder.isVreFolder()) {
				for (ACL acl : acls) {
					if (acl.getPricipal().startsWith(pContext.getInfrastructureName()))
						return acl.getAccessTypes().get(0).toString();
				}
			}
		}
		return "UNDEFINED";
	}


	/**
	 * 
	 */
	public static int getItemChildrenCount(HttpServletRequest request, String itemId) {
		PortalContext pContext = PortalContext.getConfiguration();
		String userName = pContext.getCurrentUser(request).getUsername();
		String scope = pContext.getCurrentScope(request);
		String authorizationToken = pContext.getCurrentUserToken(scope, userName);
		ScopeProvider.instance.set(scope);
		SecurityTokenProvider.instance.set(authorizationToken);
		ItemManagerClient client = AbstractPlugin.item().build();
		return client.childrenCount(itemId);
	}
}