package org.gcube.portlets.user.workspace.client.view.trash;

import java.util.List;

import org.gcube.portlets.user.workspace.client.ConstantsExplorer;
import org.gcube.portlets.user.workspace.client.model.FileTrashedModel;
import org.gcube.portlets.user.workspace.client.resources.Resources;
import org.gcube.portlets.user.workspace.shared.WorkspaceTrashOperation;

import com.extjs.gxt.ui.client.widget.Window;
import com.extjs.gxt.ui.client.widget.layout.FitLayout;

/**
 * 
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * @May 23, 2013
 * 
 * Singleton 
 */
public class WindowTrash extends Window {

	private List<FileTrashedModel> trashedFiles;
	private TrashInfoContainer trashContainers;
	private static WindowTrash INSTANCE = null;
	
	
	private WindowTrash() {
		initAccounting();
	    setIcon(Resources.getTrashFull()); //TODO
	    setHeading("Trash");
	}
	
	/**
	 * 
	 * @return
	 */
	public static synchronized WindowTrash getInstance(){
		if(INSTANCE==null)
			INSTANCE = new WindowTrash();
		
		return INSTANCE;
	}

	private void initAccounting() {
		setLayout(new FitLayout());
		setSize(750, 400);
		setResizable(true);
		setMaximizable(true);
		this.trashContainers = new TrashInfoContainer();
		add(trashContainers);
	}

	public void setWindowTitle(String title) {
		this.setHeading(title);

	}
	
	
	/**
	 * 
	 * @param fileModelId
	 * @return
	 */
	public boolean deleteFileFromTrash(String fileModelId){
		boolean deleted = this.trashContainers.deleteItem(fileModelId);
		
		updateTrashIcon(this.trashContainers.trashSize()>0);
		
		return deleted;
	}
	

	public void updateTrashContainer(List<FileTrashedModel> trashFiles) {

		this.trashContainers.resetStore();
		this.trashedFiles = trashFiles;
		this.trashContainers.updateTrash(trashFiles);
		
		updateTrashIcon(this.trashContainers.trashSize()>0);
	}
	
	public void executeOperationOnTrashContainer(List<String> trashIds, WorkspaceTrashOperation operation) {
		
		if(operation.equals(WorkspaceTrashOperation.DELETE_PERMANENTLY)){
			deleteListItems(trashIds);
			
		}else if(operation.equals(WorkspaceTrashOperation.RESTORE)){
			deleteListItems(trashIds);
		}
		
		updateTrashIcon(this.trashContainers.trashSize()>0);
	}

	public List<FileTrashedModel> getTrashedFiles() {
		return trashedFiles;
	}
	
	private void deleteListItems(List<String> trashIds){
		
		for (String identifier : trashIds) {
			this.trashContainers.deleteItem(identifier);
		}
	}
	
	public void maskContainer(String title){
		this.trashContainers.mask(title, ConstantsExplorer.LOADINGSTYLE);
	}
	
	public void unmaskContainer(){
		this.trashContainers.unmask();
	}
	
	public void updateTrashIcon(boolean trashIsFull){
		
		if(trashIsFull)
			setIcon(Resources.getTrashFull());
		else
			setIcon(Resources.getTrashEmpty());
	}

}