package com.temp.client.foundation.widget;

import com.google.gwt.dom.client.*;
import com.google.gwt.event.dom.client.*;
import com.google.gwt.user.client.ui.*;
import com.temp.client.foundation.util.*;
import com.temp.shared.utils.*;

/**
 * HelpWidget supports opening a new Browser Page for a specific section w/ an
 * optional context.
 * <p/>
 * It uses a an Image, as opposed to an Anchor, so that NO browser will be
 * tempted to make it a Tab Stop.
 *
 * @author georgs (updated from Anchor to Clickable Image)
 */
public class HelpWidget extends Composite implements IsWidget,
                                                     HasName {

    private Image helpImage = new Image( "images/inPageQuestion.png" );

    private String section = "";
    private String context = "";
    private String name = null;

    public HelpWidget() {
        initWidget( helpImage );
        helpImage.setStyleName( "help-question-mark" );
        helpImage.getElement().getStyle().setVisibility( Style.Visibility.HIDDEN );
    }

    public HelpWidget( String section, String context ) {
        this();
        setSection( section );
        setContext( context );
    }

    public HelpWidget( String section, String context, String name ) {
        this( section, context );
        setName( name );
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public void setName( String name ) {
        this.name = name;
    }

    /**
     * Set both the Section and the Context with a '#' as a separator.
     * <p/>
     * If no '#' found, then the context is empty
     *
     * @param sectionAndContext section[#context]
     */
    public void setSectionContext( String sectionAndContext ) {
        sectionAndContext = StringUtils.deNull( sectionAndContext ).trim();
        int sepAt = sectionAndContext.indexOf( '#' );
        if ( sepAt == -1 ) {
            setSectionContext( sectionAndContext, null );
        } else {
            setSectionContext( sectionAndContext.substring( 0, sepAt ), sectionAndContext.substring( sepAt + 1 ) );
        }
    }

    public void setSectionContext( String section, String context ) {
        setSection( section );
        setContext( context );
    }

    public HelpWidget link( String sectionAndContext ) {
        setSectionContext( sectionAndContext );
        return this;
    }

    public String getSection() {
        return section;
    }

    public String getContext() {
        return context;
    }

    public void setSection( String section ) {
        this.section = StringUtils.deNull( section ).trim();
    }

    public void setContext( String context ) {
        this.context = StringUtils.deNull( context ).trim();
    }

    // <g:Anchor tabIndex='-1' ui:field = 'helpurl' href='' text="?"
    // target='simple EDI - help'/>
    @Override
    protected void onAttach() {
        super.onAttach();
        if ( section.length() != 0 ) {
            helpImage.setTitle( "Click for Help" );
            helpImage.addClickHandler( new ClickHandler() {
                @Override
                public void onClick( ClickEvent event ) {
                    UtilsGwt.openWithFocus( "/help/" + section + ".jsp#" + context, "SEDIhelp",
                                            "directories=0,location=0,menubar=0,status=1,toolbar=0,resizable=1" );
                }
            } );
            helpImage.getElement().getStyle().setVisibility( Style.Visibility.VISIBLE );
        }
    }
}