/**
 *
 */
package org.gcube.common.storagehubwrapper.server.converter;

import java.util.List;

import org.gcube.common.storagehub.model.Metadata;
import org.gcube.common.storagehub.model.items.AbstractFileItem;
import org.gcube.common.storagehub.model.items.ExternalLink;
import org.gcube.common.storagehub.model.items.ExternalURL;
import org.gcube.common.storagehub.model.items.FolderItem;
import org.gcube.common.storagehub.model.items.GCubeItem;
import org.gcube.common.storagehub.model.items.GenericFileItem;
import org.gcube.common.storagehub.model.items.Item;
import org.gcube.common.storagehub.model.items.PDFFileItem;
import org.gcube.common.storagehub.model.items.SharedFolder;
import org.gcube.common.storagehub.model.items.TrashItem;
import org.gcube.common.storagehub.model.items.VreFolder;
import org.gcube.common.storagehub.model.items.nodes.Accounting;
import org.gcube.common.storagehub.model.items.nodes.Content;
import org.gcube.common.storagehub.model.items.nodes.ImageContent;
import org.gcube.common.storagehub.model.items.nodes.PDFContent;
import org.gcube.common.storagehub.model.items.nodes.accounting.AccountEntry;
import org.gcube.common.storagehub.model.service.Version;
import org.gcube.common.storagehubwrapper.shared.tohl.WorkspaceItem;
import org.gcube.common.storagehubwrapper.shared.tohl.WorkspaceItemType;
import org.gcube.common.storagehubwrapper.shared.tohl.impl.FileItem;
import org.gcube.common.storagehubwrapper.shared.tohl.impl.GcubeItem;
import org.gcube.common.storagehubwrapper.shared.tohl.impl.ImageFile;
import org.gcube.common.storagehubwrapper.shared.tohl.impl.PDFFile;
import org.gcube.common.storagehubwrapper.shared.tohl.impl.PropertyMap;
import org.gcube.common.storagehubwrapper.shared.tohl.impl.URLFile;
import org.gcube.common.storagehubwrapper.shared.tohl.impl.URLFileItem;
import org.gcube.common.storagehubwrapper.shared.tohl.impl.WorkspaceFileVersion;
import org.gcube.common.storagehubwrapper.shared.tohl.impl.WorkspaceFolder;
import org.gcube.common.storagehubwrapper.shared.tohl.impl.WorkspaceSharedFolder;
import org.gcube.common.storagehubwrapper.shared.tohl.items.FileItemType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * The Class HLMapper.
 *
 * @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
 *         Jun 20, 2018
 */
public class HLMapper {

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

	/**
	 * To URL file.
	 *
	 * @param extLink the ext link
	 * @return the URL file
	 * @throws Exception the exception
	 */
	public static URLFile toURLFile(ExternalLink extLink) throws Exception {
		return (URLFile) toWorkspaceItem(extLink, false, false, false);
	}

	/**
	 * To workspace item.
	 *
	 * @param <T>  the generic type
	 * @param item the item
	 * @return the t
	 * @throws Exception the exception
	 */
	public static <T extends WorkspaceItem> T toWorkspaceItem(Item item) throws Exception {

		return toWorkspaceItem(item, false, false, false);
	}

	/**
	 * To accounting entries.
	 *
	 * @param item the item
	 * @return the list
	 */
	public static List<AccountEntry> toAccountingEntries(Item item) {

		List<AccountEntry> accountingEntries = null;

		Accounting accounting = item.getAccounting();
		if (accounting != null) {
			accountingEntries = accounting.getEntries();
		}

		return accountingEntries;
	}

	/**
	 * To property map.
	 *
	 * @param metadata the metadata
	 * @return the property map
	 */
	public static PropertyMap toPropertyMap(Metadata metadata) {

		PropertyMap pm = null;
		if (metadata != null)
			pm = new PropertyMap(metadata.getMap());

		// IN CASE OF EMPTY MAP RETURNS NULL
		if (pm != null && pm.getValues() != null && pm.getValues().isEmpty())
			pm = null;

		return pm;
	}

	/**
	 * To workspace file version.
	 *
	 * @param fileVersion the file version
	 * @return the workspace file version
	 */
	public static WorkspaceFileVersion toWorkspaceFileVersion(Version fileVersion) {
		WorkspaceFileVersion wsFileVersion = new WorkspaceFileVersion();
		wsFileVersion.setId(fileVersion.getId());
		wsFileVersion.setName(fileVersion.getName());
		wsFileVersion.setCreated(fileVersion.getCreated());
		wsFileVersion.setCurrentVersion(fileVersion.isCurrent());
		// TODO MUST BE TERMINATED
		return wsFileVersion;
	}

	/**
	 * To workspace item.
	 *
	 * @param <T>               the generic type
	 * @param item              the item
	 * @param withAccounting    the with accounting
	 * @param withFileDetails   the with file details
	 * @param withMapProperties the with map properties
	 * @return the t
	 * @throws Exception the exception
	 */
	public static <T extends WorkspaceItem> T toWorkspaceItem(Item item, boolean withAccounting,
			boolean withFileDetails, boolean withMapProperties) throws Exception {

		try {
			List<AccountEntry> accountingEntries = null;

			if (withAccounting)
				accountingEntries = toAccountingEntries(item);

			org.gcube.common.storagehubwrapper.shared.tohl.impl.WorkspaceItem theItem = null;
			WorkspaceItemType type = null;
			Boolean isFolder = false;

			String itemName = item.getName();
			boolean isRoot = false;

			logger.trace("The item: " + item);
			logger.trace("Converting Item: " + item.getName() + " with id: " + item.getId());

			// THE ITEM IS A KIND OF FOLDER
			if (item instanceof FolderItem) {
				isFolder = true;
				FolderItem folderItem = (FolderItem) item; // ??
				theItem = new WorkspaceFolder();
				type = WorkspaceItemType.FOLDER;
				if (item instanceof SharedFolder || item instanceof VreFolder) {
					SharedFolder sharedfolder = (SharedFolder) item; // ??
					theItem = new WorkspaceSharedFolder();
					type = WorkspaceItemType.SHARED_FOLDER;
					itemName = sharedfolder.getTitle(); // IN CASE OF SHARED FOLDER THE NAME IS AN UUID, I'M USING THE
														// TITLE

					if (sharedfolder.isVreFolder()) {
						// logger.debug("Converting shared folder: "+theItem.getClass());
						// VreFolder vreFolder = (VreFolder) item;
						// theItem = new WorkspaceVREFolder(); //NEVER INSTANCE THE WorkspaceVREFolder
						// because VreFolder is never used by HL/StorageHub
						itemName = sharedfolder.getDisplayName(); // IN CASE OF VRE FOLDER I'M USING THE DISPLAYNAME
						((WorkspaceSharedFolder) theItem).setVreFolder(true);
						type = WorkspaceItemType.VRE_FOLDER;
					}
				}

				boolean isPublicItem = folderItem.isPublicItem();
				// ((WorkspaceFolder) theItem).setPublicFolder(folderItem.isPublicItem());
				// logger.debug("Wrapped as Folder");

				// TODO THIS MUST BE REMOVED. Checking the old property isPublic added as
				// "<boolean>true</boolean>" by HL
				if (!isPublicItem) {
					try {
						// Map<String, Object> map = item.getPropertyMap().getValues();
//	    				logger.debug("Property Map size: "+map.size());
//	    				for (String key : map.keySet()) {
//	    					logger.debug("Key: "+key+ "value: "+map.get(key));
//						}
						String isPublic = (String) item.getMetadata().getMap().get("isPublic");
						logger.debug("The item name: " + item.getName() + " has isPublic property like: " + isPublic);
						isPublicItem = isPublic != null ? isPublic.toLowerCase().contains("true") : false;
					} catch (Exception e) {
						// silent
					}
				}

				((WorkspaceFolder) theItem).setPublicFolder(isPublicItem);

			}

			// THE ITEM IS A KIND OF FILE
			if (item instanceof AbstractFileItem) {
				theItem = new FileItem();
				type = WorkspaceItemType.FILE_ITEM;
				FileItemType fileItemType = null;
				if (item instanceof ExternalURL) {
					theItem = new URLFileItem();
					fileItemType = FileItemType.URL_DOCUMENT;
				} else if (item instanceof GenericFileItem) {
					GenericFileItem gFI = (GenericFileItem) item; // ??
					fileItemType = FileItemType.DOCUMENT;
				} else if (item instanceof PDFFileItem) {
					theItem = new PDFFile();
					fileItemType = FileItemType.PDF_DOCUMENT;
					if (withFileDetails) {
						PDFFileItem pdfFI = (PDFFileItem) item;
						PDFContent pdfContent = pdfFI.getContent();
						PDFFile thePDFFileItem = (PDFFile) theItem;
						thePDFFileItem.setNumberOfPages(pdfContent.getNumberOfPages());
						thePDFFileItem.setProducer(pdfContent.getProducer());
						thePDFFileItem.setVersion(pdfContent.getVersion());
						thePDFFileItem.setTitle(pdfContent.getTitle());
						thePDFFileItem.setAuthor(pdfContent.getAuthor());
					}
				} else if (item instanceof org.gcube.common.storagehub.model.items.ImageFile) {
					theItem = new ImageFile();
					fileItemType = FileItemType.IMAGE_DOCUMENT;
					if (withFileDetails) {
						org.gcube.common.storagehub.model.items.ImageFile imgFI = (org.gcube.common.storagehub.model.items.ImageFile) item; // ??
						ImageFile theImageFileItem = (ImageFile) theItem;
						ImageContent content = imgFI.getContent();
						theImageFileItem.setHeight(content.getHeight());
						theImageFileItem.setWidth(content.getWidth());
						theImageFileItem.setThumbnailWidth(content.getThumbnailHeight());
						theImageFileItem.setThumbnailHeight(content.getThumbnailHeight());
					}
				}

				AbstractFileItem itemAb = (AbstractFileItem) item;
				Content aC = itemAb.getContent();
				FileItem theFileItem = (FileItem) theItem;
				theFileItem.setFileItemType(fileItemType);

				if (aC != null) {
					logger.debug("The content is not null for item: " + itemAb.getId());
					theFileItem.setMimeType(aC.getMimeType());
					theFileItem.setSize(aC.getSize());
				} else
					logger.warn("The content is null for item: " + itemAb.getId());

				// TODO ADD VERSION NAME

			}

			// ADDING (GCUBE) PROPERTIES
			PropertyMap pm = null;
			if (withMapProperties || isFolder) {
				// System.out.println("Setting map: "+item.getPropertyMap().getValues());
				pm = toPropertyMap(item.getMetadata());
			}

			// CONVERTING EXTERNALLINK
			if (item instanceof ExternalLink) {
				logger.trace("FOUND an ExternalLink...");
				type = WorkspaceItemType.URL_ITEM;
				ExternalLink extLink = (ExternalLink) item;
				theItem = new URLFile();
				URLFile theURLFile = (URLFile) theItem;
				theURLFile.setValue(extLink.getValue());
			}

			// CONVERTING TRASH ITEM
			if (item.isTrashed() && item instanceof TrashItem) {
				type = WorkspaceItemType.TRASH_ITEM;
				TrashItem trashItem = (TrashItem) item;
				itemName = trashItem.getTitle(); // IN CASE OF TRASHED ITEM THE NAME IS THE ID, SO I'M USING THE TITLE
				theItem = new org.gcube.common.storagehubwrapper.shared.tohl.impl.TrashItem();
				org.gcube.common.storagehubwrapper.shared.tohl.impl.TrashItem theTrashItem = (org.gcube.common.storagehubwrapper.shared.tohl.impl.TrashItem) theItem;
				theTrashItem.setDeletedBy(trashItem.getDeletedBy());
				theTrashItem.setDeletedTime(trashItem.getDeletedTime());
				theTrashItem.setOriginalParentId(trashItem.getOriginalParentId());
				theTrashItem.setDeletedFrom(trashItem.getDeletedFrom());
				theTrashItem.setLenght(trashItem.getLenght());
				theTrashItem.setMimeType(trashItem.getMimeType());

				isFolder = trashItem.isFolder(); // DO NOT MOVE THIS SET
				if (isFolder) // Avoiding null exception on
					type = WorkspaceItemType.TRASH_FOLDER;

				logger.debug("Wrapped as TrashItem");
			}

			if (item instanceof GCubeItem) {
				type = WorkspaceItemType.FILE_ITEM;
				GCubeItem gcubeItem = (GCubeItem) item; // ??
				theItem = new GcubeItem();
				GcubeItem theGcubeItem = (GcubeItem) theItem;
				theGcubeItem.setFileItemType(FileItemType.GCUBE_ITEM);
				theGcubeItem.setScopes(gcubeItem.getScopes());
				theGcubeItem.setCreator(gcubeItem.getCreator());
				theGcubeItem.setItemType(gcubeItem.getItemType());
				theGcubeItem.setShared(gcubeItem.isShared());
				if (withMapProperties) {
					PropertyMap property = toPropertyMap(gcubeItem.getProperty());
					theGcubeItem.setProperty(property);
				}

				logger.debug("Wrapped as GcubeItem");
			}

			if (theItem == null) {
				logger.info("Mapping unknown object as simple FileItem");
				theItem = new FileItem();
				type = WorkspaceItemType.FILE_ITEM;
				FileItem theFileItem = (FileItem) theItem;
				theFileItem.setFileItemType(FileItemType.DOCUMENT);
			}

			theItem.setId(item.getId());
			theItem.setName(itemName);
			theItem.setPath(item.getPath());
			theItem.setParentId(item.getParentId());
			theItem.setTrashed(item.isTrashed());
			theItem.setShared(item.isShared());
			theItem.setLocked(item.isLocked());
			theItem.setTitle(item.getTitle());
			theItem.setDescription(item.getDescription());
			theItem.setLastModifiedBy(item.getLastModifiedBy());
			theItem.setLastModificationTime(item.getLastModificationTime());
			theItem.setCreationTime(item.getCreationTime());
			theItem.setOwner(item.getOwner());
			theItem.setHidden(item.isHidden());
			theItem.setAccounting(accountingEntries);
			theItem.setType(type);
			theItem.setFolder(isFolder);
			theItem.setRoot(isRoot); // THIS IS ALWAYS FALSE. SHUB DOES NOT RETURN THIS INFORMATION
			theItem.setPropertyMap(pm);

			logger.debug("Wrapped WsItem: " + theItem);
			logger.debug("Wrapped WsItem has type: " + theItem.getClass().getName());

			return (T) theItem;

		} catch (Exception e) {
			logger.error("Error on converting the item with id: " + item.getId(), e);
			throw e;
		}

	}

}