package org.litesoft.GWT.client.taskbar;

import com.google.gwt.user.client.*;
import com.google.gwt.user.client.ui.*;
import org.litesoft.GWT.client.*;
import org.litesoft.GWT.client.iconservice.*;
import org.litesoft.GWT.client.widgets.*;
import org.litesoft.GWT.client.widgets.nonpublic.*;

public class FavoritesContextMenu extends PopupPanel
{
    private boolean isHorizontal;
    Grid mGrid;
    private static final int ADDITIONAL_OFFSET = 22; // 16
    private static final int PADDING = 5;

    public FavoritesContextMenu( boolean autoHide, final TaskbarHelper pHelper,
                                 final TaskbarItem pTaskbarItem )
    {
        super( autoHide );

        final boolean isFirstItem = pHelper.isFirstFavoriteItem( pTaskbarItem );
        final boolean isLastItem = pHelper.isLastFavoriteItem( pTaskbarItem );

        isHorizontal = pHelper.isPositionHorizontal();

        if ( isHorizontal )
        {
            mGrid = new Grid( 1, 3 );

            if ( isFirstItem )
            {
                mGrid.setWidget( 0, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_left-Disabled.cache.gif" ) ));
            }
            else
            {
                mGrid.setWidget( 0, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_left.cache.gif" ) ) );
            }

            if ( isLastItem )
            {
                mGrid.setWidget( 0, 2, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_right-Disabled.cache.gif" )) );
            }
            else
            {
                mGrid.setWidget( 0, 2, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_right.cache.gif" ) ) );
            }

            mGrid.setWidget( 0, 1, new OneCellTable( new Image( "images/remove_red.gif" ) ) );

            mGrid.addTableListener( new TableListener()
            {
                public void onCellClicked( SourcesTableEvents sender, int row, int cell )
                {
                    FavoritesManager favoritesManager = FavoritesManager.INSTANCE;
                    switch ( cell )
                    {
                        case 0:
                            if ( !isFirstItem )
                            {
                                favoritesManager.moveFavoriteUp( pTaskbarItem );
                            }
                            break;
                        case 1:
                            favoritesManager.removeFavorite( pTaskbarItem );
                            break;
                        case 2:
                            if ( !isLastItem )
                            {
                                favoritesManager.moveFavoriteDown( pTaskbarItem );
                            }
                            break;
                        default:
                            break;
                    }
                    hide();
                    pHelper.hidePopup();
                }
            } );
        }
        else
        {
            mGrid = new Grid( 3, 1 );

            if ( isFirstItem )
            {
                mGrid.setWidget( 0, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_up-Disabled.cache.gif" ) ) );
            }
            else
            {
                mGrid.setWidget( 0, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_up.cache.gif" ) ));
            }

            if ( isLastItem )
            {
                mGrid.setWidget( 2, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_down-Disabled.cache.gif" ) ) );
            }
            else
            {
                mGrid.setWidget( 2, 0, new OneCellTable( new Image( "common/images/windowbar/favcontext/arrow_down.cache.gif" )) );
            }

            mGrid.setWidget( 1, 0, new OneCellTable( new Image( "images/remove_red.gif" ) ) );

            mGrid.addTableListener( new TableListener()
            {
                public void onCellClicked( SourcesTableEvents sender, int row, int cell )
                {
                    FavoritesManager favoritesManager = FavoritesManager.INSTANCE;
                    switch ( row )
                    {
                        case 0:
                            if ( !isFirstItem )
                            {
                                favoritesManager.moveFavoriteUp( pTaskbarItem );
                            }
                            break;
                        case 1:
                            favoritesManager.removeFavorite( pTaskbarItem );
                            break;
                        case 2:
                            if ( !isLastItem )
                            {
                                favoritesManager.moveFavoriteDown( pTaskbarItem );
                            }
                            break;
                        default:
                            break;
                    }
                    hide();
                    pHelper.hidePopup();
                }
            } );
        }
        add( mGrid );
    }

    public void showContextMenu( final int pSenderAbsoluteLeft, final int pSenderAbsoluteTop )
    {
        setPopupPositionAndShow( new PopupPanel.PositionCallback()
        {
            public void setPosition( int offsetWidth, int offsetHeight )
            {
                int popupPositionX = 0;
                int popupPositionY = 0;

                int clientWidth = Window.getClientWidth();
                int clientHeight = Window.getClientHeight();

                if ( isHorizontal )
                {
                    if ( (pSenderAbsoluteLeft + offsetWidth) > clientWidth )
                    {
                        popupPositionX = pSenderAbsoluteLeft - offsetWidth;
                    }
                    else
                    {
                        popupPositionX = pSenderAbsoluteLeft;
                    }

                    if ( (pSenderAbsoluteTop + offsetHeight + PADDING) > clientHeight )
                    {
                        popupPositionY = pSenderAbsoluteTop - offsetHeight;
                    }
                    else
                    {
                        popupPositionY = pSenderAbsoluteTop + ADDITIONAL_OFFSET;
                    }
                }
                else
                {
                    if ( (pSenderAbsoluteLeft + offsetWidth + PADDING ) > clientWidth )
                    {
                        popupPositionX = pSenderAbsoluteLeft - offsetWidth;
                    }
                    else
                    {
                        popupPositionX = pSenderAbsoluteLeft + ADDITIONAL_OFFSET;
                    }

                    if ( (pSenderAbsoluteTop + offsetHeight) > clientHeight )
                    {
                        popupPositionY = pSenderAbsoluteTop - offsetHeight;
                    }
                    else
                    {
                        popupPositionY = pSenderAbsoluteTop;
                    }
                }

                setPopupPosition( popupPositionX, popupPositionY );
            }
        } );
    }

    private class OneCellTable extends TightGrid
    {
        public OneCellTable(Image pImage)
        {
            super(1, 1);
            setWidget( 0, 0, pImage);
            DOM.setElementAttribute( getElement(), "width", "22");
            DOM.setElementAttribute( getElement(), "height", "22");
            addStyleName( "OneCellTable" );

            setOnBrowserEventListener( Event.MOUSEEVENTS, new OnBrowserEventListener()
            {
                public boolean onBrowserEvent( Event event )
                {
                    switch ( DOM.eventGetType( event ) )
                    {
                        case Event.ONMOUSEUP:
                            UtilsGwt.eventPreventDefaultAndCancelBubble( event );

                            cleanStyles();
                            addStyleName( "OneCellTable-MouseUp" );
                            break;

                        case Event.ONMOUSEOVER:
                            UtilsGwt.eventPreventDefaultAndCancelBubble( event );

                            cleanStyles();
                            addStyleName( "OneCellTable-MouseOver" );
                            break;

                        case Event.ONMOUSEOUT:
                            UtilsGwt.eventPreventDefaultAndCancelBubble( event );

                            cleanStyles();
                            addStyleName( "OneCellTable-MouseOut" );
                            break;

                        case Event.ONMOUSEDOWN:
                            UtilsGwt.eventPreventDefaultAndCancelBubble( event );

                            cleanStyles();
                            addStyleName( "OneCellTable-MouseDown" );
                            break;

                        case Event.ONMOUSEMOVE:
                        default:
                            break;
                    }
                    return false;
                }
            } );
        }

        private void cleanStyles()
        {
            removeStyleName( "OneCellTable-MouseUp" );
            removeStyleName( "OneCellTable-MouseOver" );
            removeStyleName( "OneCellTable-MouseOut" );
            removeStyleName( "OneCellTable-MouseDown" );                
        }
    }
}