/**
 * 
 */
package org.gcube.portlets.user.shareupdates.client.form;

import org.gcube.portlets.user.shareupdates.client.dialog.PickUsersDialog;
import org.gcube.portlets.user.shareupdates.client.elements.ContentEditDiv;
import org.gcube.portlets.user.shareupdates.client.elements.Span;
import org.gcube.portlets.user.shareupdates.client.elements.TagBox;
import org.gcube.portlets.user.shareupdates.client.events.PickedUserEvent;
import org.gcube.portlets.user.shareupdates.client.events.PickedUserEventHandler;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.DomEvent;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.shared.HandlerManager;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.Timer;

/**
 * @author massi
 *
 */
public class SmartTextArea extends ContentEditDiv {
	private final HandlerManager eventBus = new HandlerManager(null);
	
	public final static int ARROW_UP = 38; 
	public final static int ARROW_DOWN = 40; 
	PickUsersDialog pickUserDlg = new PickUsersDialog(eventBus);
	/**
	 * 
	 */
	public SmartTextArea() {
		bind();
		sinkEvents(Event.ONPASTE);
		sinkEvents(Event.ONCONTEXTMENU);
		sinkEvents(Event.ONKEYUP);
		sinkEvents(Event.ONKEYDOWN);
	}

	/**
	 * events binder
	 */
	private void bind() {
		eventBus.addHandler(PickedUserEvent.TYPE, new PickedUserEventHandler() {
			@Override
			public void onSelectedUser(PickedUserEvent event) {
				String[] toSplit = getHTML().split("@"); //get the interesting part		
				TagBox span = new TagBox(event.getSelectedUser().getFullName());
				setHTML(toSplit[0]);
				getElement().appendChild(span.getElement());
				getElement().appendChild(new Span(" ").getElement());				
				setEndOfContenteditable();
			}			
		});  
	}
	/**
	 * paste and other events overridden
	 */
	public void onBrowserEvent(Event event) {
		super.onBrowserEvent(event);
		switch (event.getTypeInt()) {
		case Event.ONPASTE: {
			final String before = getText();
			GWT.log("BEFORE:" + before);
			Timer t = new Timer() {
				@Override
				public void run() {
					String toCheck = getText().replaceAll(before, "");
					ShareUpdateForm.get().checkLink(toCheck);
				}
			};
			t.schedule(100);
			break;
		}
		case Event.ONCONTEXTMENU: {
			removeSampleText();
			break;
		}
		case Event.ONKEYUP: {
			pickUserDlg.onKeyUp(event, this.getAbsoluteLeft(), this.getAbsoluteTop()+65, getText());				
			break;
		}
		case Event.ONKEYDOWN: { //avoid the arrow up to move the cursor at the beginning of the textbox and the TAB to move around inputs and enter to go newline
			if (event.getKeyCode() == ARROW_UP || event.getKeyCode() == KeyCodes.KEY_TAB || event.getKeyCode() ==  KeyCodes.KEY_ENTER) {
				DOM.eventCancelBubble(event, true);
				DOM.eventPreventDefault(event);
				return;
			}
			break;
		}
		}
		DomEvent.fireNativeEvent(event, this, this.getElement());
	}



	protected void removeSampleText() {
		if (getText().equals(ShareUpdateForm.SHARE_UPDATE_TEXT) || getText().equals(ShareUpdateForm.ERROR_UPDATE_TEXT) ) {
			setText("");
			addStyleName("dark-color");
			removeStyleName("error");
		}
	}
}