package org.gcube.portlets.user.geoportaldataentry.client.ui.edit;

import java.util.List;

import org.gcube.application.geoportalcommon.shared.products.BaseConcessioneDV;
import org.gcube.application.geoportalcommon.shared.products.ConcessioneDV;
import org.gcube.application.geoportalcommon.shared.products.content.WorkspaceContentDV;
import org.gcube.application.geoportalcommon.shared.products.model.AbstractRelazioneScavoDV;
import org.gcube.application.geoportalcommon.shared.products.model.UploadedImageDV;
import org.gcube.portlets.user.geoportaldataentry.client.ConstantsGeoPortalDataEntryApp.RECORD_TYPE;
import org.gcube.portlets.user.geoportaldataentry.client.GeoPortalDataEntryApp;
import org.gcube.portlets.widgets.mpformbuilder.client.ui.upload.MultipleDilaogUpload;

import com.github.gwtbootstrap.client.ui.ControlGroup;
import com.github.gwtbootstrap.client.ui.Label;
import com.github.gwtbootstrap.client.ui.ListBox;
import com.github.gwtbootstrap.client.ui.constants.LabelType;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * The Class UpdateFileset.
 *
 * @author Francesco Mangiacrapa at ISTI-CNR francesco.mangiacrapa@isti.cnr.it
 * 
 *         Sep 27, 2021
 */
public class UpdateFileset extends Composite {

	private static UpdateFilesetUiBinder uiBinder = GWT.create(UpdateFilesetUiBinder.class);

	/**
	 * The Interface UpdateFilesetUiBinder.
	 *
	 * @author Francesco Mangiacrapa at ISTI-CNR francesco.mangiacrapa@isti.cnr.it
	 * 
	 *         Sep 27, 2021
	 */
	interface UpdateFilesetUiBinder extends UiBinder<Widget, UpdateFileset> {
	}

	@UiField
	ListBox listBoxPaths;

	@UiField
	ListBox listBoxIndex;

	@UiField
	ControlGroup cgSelectFile;

	@UiField
	HTMLPanel uploadFileContainer;

	private List<String> listFileSetPaths;

	private boolean placeholderRemoved = false;

	private String recordId;

	private BaseConcessioneDV selectedConcessione;

	private ConcessioneDV fullConcessione;

	private RECORD_TYPE recordType;

	/**
	 * Instantiates a new update fileset.
	 *
	 * @param listFileSetPaths the list file set paths
	 */
	public UpdateFileset(BaseConcessioneDV selectedConcessione, RECORD_TYPE recordType, List<String> listFileSetPaths) {
		initWidget(uiBinder.createAndBindUi(this));
		this.selectedConcessione = selectedConcessione;
		this.recordType = recordType;
		this.listFileSetPaths = listFileSetPaths;
		listBoxPaths.addItem("Select a section...");
		for (String path : listFileSetPaths) {
			listBoxPaths.addItem(path);
		}

		// add handler on select
		listBoxPaths.addChangeHandler(new ChangeHandler() {

			@Override
			public void onChange(ChangeEvent event) {
				GWT.log("Profile type selection changed...");
				cgSelectFile.setVisible(false);

				if (!placeholderRemoved) {
					listBoxPaths.removeItem(0); // this is the placeholder
					placeholderRemoved = true;
				}
				showUploadFileGUI();
			}

		});

		GeoPortalDataEntryApp.geoportalDataEntryService.getRecord(selectedConcessione.getItemId(), recordType,
				new AsyncCallback<ConcessioneDV>() {

					@Override
					public void onSuccess(ConcessioneDV theRecord) {
						fullConcessione = theRecord;
					}

					@Override
					public void onFailure(Throwable caught) {
						Window.alert(caught.getMessage());
					}
				});

	}

	/**
	 * Show upload file GUI.
	 */
	private void showUploadFileGUI() {
		uploadFileContainer.setVisible(true);
		uploadFileContainer.clear();

		listBoxIndex.clear();
		cgSelectFile.setVisible(true);

		if (listBoxPaths.getSelectedItemText().contains("abstract_relazione")) {
			AbstractRelazioneScavoDV ar = fullConcessione.getAbstractRelazioneScavo();
			if (ar == null) {
				showMessage("abstract_relazione " + " NOT AVAILABLE", LabelType.WARNING);
				return;
			}
			fillListBoxToBeReplaced("abstract_relazione", ar.getListWsContent());
		} else if (listBoxPaths.getSelectedItemText().contains("immagini")) {
			List<UploadedImageDV> listImmagini = fullConcessione.getImmaginiRappresentative();
			if (listImmagini == null || listImmagini.isEmpty()) {
				showMessage("immagini " + " NOT AVAILABLE", LabelType.WARNING);
				return;
			}
			for (UploadedImageDV uploadedImageDV : listImmagini) {
				fillListBoxToBeReplaced("immagini", uploadedImageDV.getListWsContent());
			}

		}

		if (listBoxIndex.getItemCount() > 1) {
			listBoxIndex.addChangeHandler(new ChangeHandler() {

				@Override
				public void onChange(ChangeEvent event) {
					showFileUploadInteraction();
				}
			});
		}

	}

	private void fillListBoxToBeReplaced(String section, List<WorkspaceContentDV> listWSC) {

		listBoxIndex.clear();

		listBoxIndex.addItem("Select a file...");

		if (listWSC == null || listWSC.isEmpty()) {
			showMessage(section + " DOES NOT CONTAIN FILES", LabelType.WARNING);
			return;
		}

		for (WorkspaceContentDV wsContent : listWSC) {
			String name = wsContent.getName() == null || wsContent.getName().isEmpty() ? wsContent.getLink()
					: wsContent.getName();
			listBoxIndex.addItem(name);
		}
	}

	private void showFileUploadInteraction() {
		uploadFileContainer.clear();
		HTML label = new HTML();
		label.setHTML("<i>Going to replace the file into section: " + listBoxIndex.getSelectedItemText() + " with</i>");

		uploadFileContainer.add(label);
		MultipleDilaogUpload holder = new MultipleDilaogUpload();
		uploadFileContainer.add(holder);
	}

	private void showMessage(String txt, LabelType type) {
		Label l = new Label();
		l.setType(type);
		l.setText(txt);
		uploadFileContainer.add(l);
	}

}