package org.gcube.portlets.user.socialprofile.client.ui;

import org.gcube.portal.databook.shared.UserInfo;
import org.gcube.portlets.user.socialprofile.client.SocialService;
import org.gcube.portlets.user.socialprofile.client.SocialServiceAsync;
import org.gcube.portlets.user.socialprofile.shared.UserContext;

import com.google.gwt.core.client.GWT;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
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.Button;
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.Image;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.Widget;

public class DisplayProfile extends Composite {
	protected final static String HEADLINE_TEXT = "Professional Headline";
	protected final static String HEADLINE_ERROR = "Your Headline please";
	protected final static String ISTI_TEXT = "Company";
	
	private static DisplayProfileUiBinder uiBinder = GWT
			.create(DisplayProfileUiBinder.class);

	interface DisplayProfileUiBinder extends UiBinder<Widget, DisplayProfile> {
	}
	public static final String avatar_default = GWT.getModuleBaseURL() + "../images/Avatar_default.png";
	public static final String loading = GWT.getModuleBaseURL() + "../images/avatarLoader.gif";
	public static final String savingImage = GWT.getModuleBaseURL() + "../images/saving.gif";
	public static final String GET_OID_PARAMETER = "oid";
	private final SocialServiceAsync socialService = GWT.create(SocialService.class);

	@UiField HTMLPanel mainPanel;
	@UiField Image avatarImage;	
	@UiField HTML userFullName;
	@UiField TextBox headline;
	@UiField TextBox institution;
	
	@UiField HTML editHeadline;
	@UiField HTML editIsti;
	
	@UiField Image savingHeadline;
	@UiField Button saveHead;
	@UiField Button cancelHead;
	@UiField Button messageButton;

	private String currHeadLine;
	
	private UserInfo myUserInfo;

	public DisplayProfile() {
		initWidget(uiBinder.createAndBindUi(this));
		avatarImage.setUrl(loading);
		mainPanel.addStyleName("framed");	
		savingHeadline.setUrl(savingImage);
		socialService.getUserContext(getUserToShowId(), new AsyncCallback<UserContext>() {
			@Override
			public void onSuccess(UserContext result) {
				myUserInfo = result.getUserInfo();				
				avatarImage.getElement().getParentElement().setAttribute("href", myUserInfo.getAccountURL());
				avatarImage.setSize("100px", "100px");
				avatarImage.setUrl(myUserInfo.getAvatarId());	
				userFullName.setText(myUserInfo.getFullName());
			
				if (getUserToShowId() == null) { //its him seeing his profile
					
					String head = (result.getHeadline() == null || result.getHeadline().compareTo("") == 0) ? HEADLINE_TEXT : result.getHeadline();
					String isti = (result.getInstitution() == null ||result.getInstitution().compareTo("") == 0) ? ISTI_TEXT : result.getInstitution();
					headline.setText(head);
					institution.setText(isti);
										
					editHeadline.setStyleName("editImage");
					editHeadline.setTitle("Edit your Professional Headline");
					headline.setMaxLength(35);
					
					editIsti.setStyleName("editImage");
					editIsti.setTitle("Edit your Company");
					
					messageButton.removeFromParent();
					currHeadLine = head;
					if  (result.getHeadline() == null || result.getHeadline().compareTo("") == 0) {
						headline.getElement().getStyle().setOpacity(0.5);
						institution.getElement().getStyle().setOpacity(0.5);
						headline.getElement().getStyle().setWidth(270, Unit.PX);
						institution.getElement().getStyle().setWidth(270, Unit.PX);
					}
				} else { //its someone else
					String head = (result.getHeadline() == null || result.getHeadline().compareTo("") == 0) ? "" : result.getHeadline();
					String isti = (result.getInstitution() == null || result.getInstitution().compareTo("") == 0) ? "" : result.getInstitution();
					headline.setText(head);
					institution.setText(isti);
					
					avatarImage.getElement().getParentElement().setAttribute("href", "");
					avatarImage.setTitle(myUserInfo.getFullName());
					messageButton.setText("Private Message");
					messageButton.setVisible(true);
				}


			}
			@Override
			public void onFailure(Throwable caught) {
				Window.alert("Failure: " + caught.getMessage());
				avatarImage.setSize("100px", "100px");
				avatarImage.setUrl(avatar_default);				
			}
		});
		
		editHeadline.addClickHandler(new ClickHandler() {			
			@Override
			public void onClick(ClickEvent event) {
				headline.addStyleName("edit");		
				headline.setReadOnly(false);
				headline.setFocus(true);
				headline.selectAll();		
				editHeadline.setVisible(false);
				saveHead.setVisible(true);		
				cancelHead.setVisible(true);		
			}
		});
		
		saveHead.addClickHandler(new ClickHandler() {			
			@Override
			public void onClick(ClickEvent event) {
				String toShare = escapeHtml(headline.getText());
				if (toShare.equals("") || toShare.equals(HEADLINE_TEXT) || toShare.equals(HEADLINE_ERROR)) {
					headline.setText(HEADLINE_ERROR);
				} else {
					currHeadLine = toShare;
					saveHead.setVisible(false);		
					cancelHead.setVisible(false);
					savingHeadline.setVisible(true);
					headline.setReadOnly(true);
					socialService.saveHeadline(currHeadLine, new AsyncCallback<Boolean>() {

						@Override
						public void onFailure(Throwable caught) {
							Window.alert("Sorry, an error occurred");
							cancelHeadline();							
						}

						@Override
						public void onSuccess(Boolean result) {
							headline.removeStyleName("edit");		
							editHeadline.setVisible(true);
							headline.getElement().getStyle().setOpacity(1.0);							
						}
					});
					
				}
			}
		});
		
		cancelHead.addClickHandler(new ClickHandler() {			
			@Override
			public void onClick(ClickEvent event) {
				cancelHeadline();
			}
		});
	}
	
	private void cancelHeadline() {
		headline.removeStyleName("edit");		
		headline.setReadOnly(true);
		editHeadline.setVisible(true);
		saveHead.setVisible(false);		
		cancelHead.setVisible(false);	
		headline.setText(currHeadLine);
	}
	/**
	 * check if it has to show just one feed
	 * @return
	 */
	private String getUserToShowId() {
		return Window.Location.getParameter(GET_OID_PARAMETER);
	}
	
	/**
	 * Escape an html string. Escaping data received from the client helps to
	 * prevent cross-site script vulnerabilities.
	 * 
	 * @param html the html string to escape
	 * @return the escaped string
	 */
	private String escapeHtml(String html) {
		if (html == null) {
			return null;
		}
		return html.replaceAll("&", "&amp;").replaceAll("<", "&lt;")
				.replaceAll(">", "&gt;");
	}
}