package org.gcube.datacatalogue.grsf_manage_widget.client.view.subwidgets;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.gcube.datacatalogue.grsf_manage_widget.client.GRSFManageWidgetServiceAsync;
import org.gcube.datacatalogue.grsf_manage_widget.shared.ConnectBean;
import org.gcube.datacatalogue.grsf_manage_widget.shared.ManageProductBean;

import com.github.gwtbootstrap.client.ui.Button;
import com.github.gwtbootstrap.client.ui.Paragraph;
import com.github.gwtbootstrap.client.ui.TextBox;
import com.github.gwtbootstrap.client.ui.constants.IconType;
import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Style.Float;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ChangeEvent;
import com.google.gwt.event.dom.client.ChangeHandler;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

public class ConnectToWidget extends Composite{

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

	interface ConnectToWidgetUiBinder extends UiBinder<Widget, ConnectToWidget> {
	}

	@UiField
	VerticalPanel connectPanel;

	@UiField
	Button suggestRecord;

	private GRSFManageWidgetServiceAsync service;
	private List<Pair> connectList = new ArrayList<Pair>(0);

	public ConnectToWidget(final ManageProductBean bean, GRSFManageWidgetServiceAsync service) {
		initWidget(uiBinder.createAndBindUi(this));
		
		this.service = service;
		
		String acceptedDomain = bean.getGrsfDomain().equalsIgnoreCase("stock") ? "Fishery" : "Stock";
		suggestRecord.setTitle("Connect this " + bean.getGrsfDomain() + " record to a " + acceptedDomain + " record ");
		suggestRecord.setIcon(IconType.PLUS_SIGN);
		suggestRecord.getElement().getStyle().setFloat(Float.RIGHT);

		// add handler
		suggestRecord.addClickHandler(new ClickHandler() {

			@Override
			public void onClick(ClickEvent arg0) {

				ConnectBean cb = new ConnectBean();
				cb.setSourceDomain(bean.getGrsfDomain());
				Widget w = buildWidgetConnect(cb);
				connectList.add(new Pair(cb, w));
				connectPanel.add(w);

			}
		});

	}
	
	/**
	 * Builds up a widget for connecting records.
	 * @param w the widget
	 * @param cb the connectBean.
	 */
	private Widget buildWidgetConnect(final ConnectBean cb){

		VerticalPanel main = new VerticalPanel();
		main.setWidth("90%");
		HorizontalPanel hp = new HorizontalPanel();
		hp.setWidth("100%");

		VerticalPanel vpLeft = new VerticalPanel();
		vpLeft.getElement().getStyle().setMarginLeft(15, Unit.PX);
		vpLeft.setWidth("80%");
		Paragraph semanticIdentifier = new Paragraph("Semantic Identifier:");
		final TextBox box = new TextBox();
		box.addKeyPressHandler(new KeyPressHandler() {
			
			@Override
			public void onKeyPress(KeyPressEvent event) {
				
				String currentText = box.getText().trim();
				GWT.log("Text changed to " + currentText);
				cb.setDestSemanticIdentifier(currentText);
				
			}
		});
		box.addChangeHandler(new ChangeHandler() {
			
			@Override
			public void onChange(ChangeEvent event) {
				
				String currentText = box.getText().trim();
				GWT.log("Text changed to " + currentText);
				cb.setDestSemanticIdentifier(currentText);
				
			}
		});
		box.setWidth("512px");
		box.setPlaceholder("Insert the Semantic Identifier of the record to connect");

		vpLeft.add(semanticIdentifier);
		vpLeft.add(box);

		VerticalPanel vpRight = new VerticalPanel();
		vpRight.setWidth("20%");

		Button removeExtra = new Button();
		removeExtra.setIcon(IconType.MINUS);
		removeExtra.setTitle("Remove this connection");
		removeExtra.addClickHandler(new ClickHandler() {

			@Override
			public void onClick(ClickEvent arg0) {

				// remove this object from the pairs list
				Iterator<Pair> iterator = connectList.iterator();
				while (iterator.hasNext()) {
					Pair pair = (Pair) iterator
							.next();
					if(pair.getO().equals(cb)){
						pair.getW().removeFromParent();
						iterator.remove();
					}
				}
			}
		});
		vpRight.getElement().getStyle().setFloat(Float.RIGHT);
		vpRight.add(removeExtra);
		hp.add(vpLeft);
		hp.add(vpRight);
		HTML separator = new HTML("<hr style=\"width:100%;\"/>");
		connectPanel.add(separator);
		main.add(hp);
		main.add(separator);
		return main;
	}

	public List<ConnectBean> getConnectList() {
		
		List<ConnectBean> toReturn = new ArrayList<ConnectBean>(0);
		
		for (Pair p : connectList) {
			toReturn.add((ConnectBean) p.getO());
		}
		
		return toReturn;
	}

}