/*******************************************************************************
 * Copyright (c) 2004 Actuate Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/

package org.eclipse.birt.report.item.crosstab.ui.views.dialogs;

import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;

import org.eclipse.birt.report.designer.core.model.SessionHandleAdapter;
import org.eclipse.birt.report.designer.internal.ui.dialogs.BaseDialog;
import org.eclipse.birt.report.designer.internal.ui.util.IHelpContextIds;
import org.eclipse.birt.report.designer.internal.ui.util.UIUtil;
import org.eclipse.birt.report.designer.util.DEUtil;
import org.eclipse.birt.report.designer.util.FontManager;
import org.eclipse.birt.report.item.crosstab.core.ILevelViewConstants;
import org.eclipse.birt.report.item.crosstab.core.de.CrosstabReportItemHandle;
import org.eclipse.birt.report.item.crosstab.core.de.CrosstabViewHandle;
import org.eclipse.birt.report.item.crosstab.core.de.DimensionViewHandle;
import org.eclipse.birt.report.item.crosstab.core.de.LevelViewHandle;
import org.eclipse.birt.report.item.crosstab.ui.i18n.Messages;
import org.eclipse.birt.report.model.api.CommandStack;
import org.eclipse.birt.report.model.api.ExtendedItemHandle;
import org.eclipse.birt.report.model.api.PropertyHandle;
import org.eclipse.birt.report.model.api.activity.SemanticException;
import org.eclipse.birt.report.model.api.elements.DesignChoiceConstants;
import org.eclipse.birt.report.model.api.metadata.IChoice;
import org.eclipse.jface.resource.JFaceColors;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;

/**
 * 
 */

public class CrosstabPageBreakDialog extends BaseDialog
{

	protected LevelViewHandle levelHandle;
	protected CrosstabReportItemHandle reportItemHandle;

	public final static String TITLE = Messages.getString( "CrosstabPageBreakDialog.Title" ); //$NON-NLS-1$

	protected Combo levelCombo, pageBreakBeforeCombo, pageBreakAfterCombo;

	final private static IChoice[] pagebreakBeforeChoicesAll = DEUtil.getMetaDataDictionary( )
			.getChoiceSet( DesignChoiceConstants.CHOICE_PAGE_BREAK_BEFORE )
			.getChoices( );
	final private static IChoice[] pagebreakAfterChoicesAll = DEUtil.getMetaDataDictionary( )
			.getChoiceSet( DesignChoiceConstants.CHOICE_PAGE_BREAK_AFTER )
			.getChoices( );

	final private static int PAGE_BREAK_BEFORE = 0;
	final private static int PAGE_BREAK_AFTER = 1;

	private int axis;

	public void setAxis( int axis )
	{
		this.axis = axis;
	}

	protected CrosstabPageBreakDialog( String title )
	{
		this( UIUtil.getDefaultShell( ), title );
		// TODO Auto-generated constructor stub
	}

	protected CrosstabPageBreakDialog( Shell parentShell, String title )
	{
		super( parentShell, title );
	}

	public void setLevelViewHandle( LevelViewHandle levelHandle )
	{
		this.levelHandle = levelHandle;
	}

	public CrosstabPageBreakDialog( CrosstabReportItemHandle reportItem )
	{
		this( TITLE );
		this.reportItemHandle = reportItem;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.dialogs.Dialog#createContents(org.eclipse.swt.widgets.Composite)
	 */
	protected Control createContents( Composite parent )
	{
		UIUtil.bindHelp( parent,
				IHelpContextIds.INSERT_EDIT_PAGE_BREAK_DIALOG_ID );

		GridData gdata;
		GridLayout glayout;
		Composite contents = new Composite( parent, SWT.NONE );
		contents.setLayout( new GridLayout( ) );
		contents.setLayoutData( new GridData( GridData.FILL_BOTH ) );

		createTitleArea( contents );

		Composite composite = new Composite( contents, SWT.NONE );
		glayout = new GridLayout( );
		glayout.marginHeight = 0;
		glayout.marginWidth = 0;
		glayout.verticalSpacing = 0;
		composite.setLayout( glayout );
		composite.setLayoutData( new GridData( GridData.FILL_BOTH ) );
		applyDialogFont( composite );
		initializeDialogUnits( composite );

		Composite innerParent = (Composite) createDialogArea( composite );
		createButtonBar( composite );

		createPageBreakContent( innerParent );

		Composite space = new Composite( innerParent, SWT.NONE );
		gdata = new GridData( GridData.FILL_HORIZONTAL );
		gdata.minimumWidth = 200;
		gdata.heightHint = 10;
		space.setLayoutData( gdata );

		Label lb = new Label( innerParent, SWT.SEPARATOR | SWT.HORIZONTAL );
		lb.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );

		iniValue( );
		// updateButtons( );

		return composite;
	}

	protected void iniValue( )
	{
		if ( levelHandle != null )
		{			
			levelCombo.add( levelHandle.getCubeLevelName( ) );
			levelCombo.setEnabled( false );
			levelCombo.select( 0 );
			if ( levelHandle.getPageBreakBefore( ) != null )
			{
				pageBreakBeforeCombo.select( getPageBreakIndex( levelHandle.getPageBreakBefore( ),
						PAGE_BREAK_BEFORE ) );
			}
			if ( levelHandle.getPageBreakAfter( ) != null )
			{
				pageBreakAfterCombo.select( getPageBreakIndex( levelHandle.getPageBreakAfter( ),
						PAGE_BREAK_AFTER ) );
			}
		}
		else
		{
			levelCombo.setItems( getLevelNames( reportItemHandle, axis ) );
			levelCombo.setEnabled( true );
			levelCombo.select( 0 );
			pageBreakBeforeCombo.select( 0 );
			pageBreakAfterCombo.select( 0 );
		}

		updateButtons( );

	}

	private CommandStack getActionStack( )
	{
		return SessionHandleAdapter.getInstance( ).getCommandStack( );
	}

	protected void okPressed( )
	{

		CommandStack stack = getActionStack( );
		stack.startTrans( Messages.getString( "FormPage.Menu.ModifyProperty" ) ); //$NON-NLS-1$

		LevelViewHandle level = getLevelFromName( reportItemHandle,
				levelCombo.getText( ),
				axis );
		try
		{
			level.setPageBreakBefore( getPageBreak( pageBreakBeforeCombo.getSelectionIndex( ),
					PAGE_BREAK_BEFORE ) );
			level.setPageBreakAfter( getPageBreak( pageBreakAfterCombo.getSelectionIndex( ),
					PAGE_BREAK_AFTER ) );
			stack.commit( );
		}
		catch ( SemanticException e )
		{
			// TODO Auto-generated catch block
			logger.log(Level.SEVERE, e.getMessage(),e);
			stack.rollback( );
			super.okPressed( );
			return;
		}

		super.okPressed( );
	}

	protected void createPageBreakContent( Composite parent )
	{
		Composite container = new Composite( parent, SWT.NONE );
		container.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
		GridLayout glayout = new GridLayout( 2, false );
		container.setLayout( glayout );

		Label lb = new Label( container, SWT.NONE );
		lb.setText( Messages.getString( "CrosstabPageBreakDialog.Text.GroupLevel" ) ); //$NON-NLS-1$

		levelCombo = new Combo( container, SWT.BORDER | SWT.READ_ONLY );
		GridData gdata = new GridData( GridData.FILL_HORIZONTAL );
		gdata.minimumWidth = 140;
		levelCombo.setLayoutData( gdata );

		levelCombo.addListener( SWT.Selection, updateButtonListener );

		lb = new Label( container, SWT.NONE );
		lb.setText( Messages.getString( "CrosstabPageBreakDialog.Text.PageBreakBefore" ) ); //$NON-NLS-1$

		pageBreakBeforeCombo = new Combo( container, SWT.BORDER | SWT.READ_ONLY );
		pageBreakBeforeCombo.setLayoutData( gdata );
		pageBreakBeforeCombo.setItems( getPageBreakDisplayNames( PAGE_BREAK_BEFORE ) );
		pageBreakBeforeCombo.addListener( SWT.Selection, updateButtonListener );

		lb = new Label( container, SWT.NONE );
		lb.setText( Messages.getString( "CrosstabPageBreakDialog.Text.PageBreakAfter" ) ); //$NON-NLS-1$

		pageBreakAfterCombo = new Combo( container, SWT.BORDER | SWT.READ_ONLY );
		pageBreakAfterCombo.setLayoutData( gdata );
		pageBreakAfterCombo.setItems( getPageBreakDisplayNames( PAGE_BREAK_AFTER ) );
		pageBreakAfterCombo.addListener( SWT.Selection, updateButtonListener );

	}

	private Composite createTitleArea( Composite parent )
	{
		int heightMargins = 3;
		int widthMargins = 8;
		final Composite titleArea = new Composite( parent, SWT.NONE );
		FormLayout layout = new FormLayout( );
		layout.marginHeight = heightMargins;
		layout.marginWidth = widthMargins;
		titleArea.setLayout( layout );

		Display display = parent.getDisplay( );
		Color background = JFaceColors.getBannerBackground( display );
		GridData layoutData = new GridData( GridData.FILL_HORIZONTAL );
		layoutData.heightHint = 20 + ( heightMargins * 2 );
		titleArea.setLayoutData( layoutData );
		titleArea.setBackground( background );

		titleArea.addPaintListener( new PaintListener( ) {

			public void paintControl( PaintEvent e )
			{
				e.gc.setForeground( titleArea.getDisplay( )
						.getSystemColor( SWT.COLOR_WIDGET_NORMAL_SHADOW ) );
				Rectangle bounds = titleArea.getClientArea( );
				bounds.height = bounds.height - 2;
				bounds.width = bounds.width - 1;
				e.gc.drawRectangle( bounds );
			}
		} );

		Label label = new Label( titleArea, SWT.NONE );
		label.setBackground( background );
		label.setFont( FontManager.getFont( label.getFont( ).toString( ),
				10,
				SWT.BOLD ) );
		label.setText( getTitle( ) ); 

		return titleArea;
	}

	private String[] getPageBreakDisplayNames( int type )
	{
		IChoice[][] pageBreakChoices = new IChoice[2][];
		pageBreakChoices[0] = pagebreakBeforeChoicesAll;
		pageBreakChoices[1] = pagebreakAfterChoicesAll;

		if ( type > 2 || type < 0 )
		{
			type = PAGE_BREAK_BEFORE;
		}

		String retArray[] = new String[pageBreakChoices[type].length];
		for ( int i = 0; i < pageBreakChoices[type].length; i++ )
		{
			retArray[i] = pageBreakChoices[type][i].getDisplayName( );
		}

		return retArray;

	}

	private String getPageBreakDisplayName( String name, int type )
	{
		IChoice[][] pageBreakChoices = new IChoice[2][];
		pageBreakChoices[0] = pagebreakBeforeChoicesAll;
		pageBreakChoices[1] = pagebreakAfterChoicesAll;

		if ( type > 2 || type < 0 )
		{
			type = PAGE_BREAK_BEFORE;
		}

		String retArray[] = new String[pageBreakChoices[type].length];
		for ( int i = 0; i < pageBreakChoices[type].length; i++ )
		{
			if ( pageBreakChoices[type][i].getName( ).equals( name ) )
			{
				return pageBreakChoices[type][i].getDisplayName( );
			}

		}

		return ""; //$NON-NLS-1$

	}

	private String getPageBreak( int index, int type )
	{
		IChoice[][] pageBreakChoices = new IChoice[2][];
		pageBreakChoices[0] = pagebreakBeforeChoicesAll;
		pageBreakChoices[1] = pagebreakAfterChoicesAll;

		if ( type > 2 || type < 0 )
		{
			type = PAGE_BREAK_BEFORE;
		}

		if ( index < 0 || index >= pageBreakChoices[type].length )
		{
			return null;
		}

		return pageBreakChoices[type][index].getName( );

	}

	private int getPageBreakIndex( String name, int type )
	{
		IChoice[][] pageBreakChoices = new IChoice[2][];
		pageBreakChoices[0] = pagebreakBeforeChoicesAll;
		pageBreakChoices[1] = pagebreakAfterChoicesAll;

		if ( type > 2 || type < 0 )
		{
			type = PAGE_BREAK_BEFORE;
		}

		String retArray[] = new String[pageBreakChoices[type].length];
		for ( int i = 0; i < pageBreakChoices[type].length; i++ )
		{
			if ( pageBreakChoices[type][i].getName( ).equals( name ) )
			{
				return i;
			}

		}

		return -1;

	}

	private String[] getLevelNames( CrosstabReportItemHandle crosstabHandle,
			int axis )
	{
		List list = new ArrayList( );
		if ( crosstabHandle.getCrosstabView( axis ) == null )
		{
			return new String[0];
		}

		CrosstabViewHandle crosstabView = crosstabHandle.getCrosstabView( axis );
		if ( crosstabView == null )
		{
			return new String[0];
		}
		int dimensionCount = crosstabView.getDimensionCount( );

		for ( int i = 0; i < dimensionCount; i++ )
		{
			DimensionViewHandle dimension = crosstabView.getDimension( i );
			int levelCount = dimension.getLevelCount( );
			for ( int j = 0; j < levelCount; j++ )
			{
				if ( !isInLevelList( dimension.getLevel( j ) ) )
					list.add( dimension.getLevel( j ).getCubeLevelName( ) );
			}
		}

		return (String[]) list.toArray( new String[list.size( )] );

	}

	private LevelViewHandle getLevelFromName(
			CrosstabReportItemHandle crosstabHandle, String name, int axis )
	{
		List list = new ArrayList( );
		if ( crosstabHandle.getCrosstabView( axis ) == null )
		{
			return null;
		}

		CrosstabViewHandle crosstabView = crosstabHandle.getCrosstabView( axis );
		if ( crosstabView == null )
		{
			return null;
		}
		int dimensionCount = crosstabView.getDimensionCount( );

		for ( int i = 0; i < dimensionCount; i++ )
		{
			DimensionViewHandle dimension = crosstabView.getDimension( i );
			int levelCount = dimension.getLevelCount( );
			for ( int j = 0; j < levelCount; j++ )
			{
				if ( dimension.getLevel( j ).getCubeLevelName( ).equals( name ) )
				{
					return dimension.getLevel( j );
				}
			}
		}

		return null;

	}

	private boolean isConditionOK( )
	{
		if ( levelCombo.getSelectionIndex( ) == -1 )
		{
			return false;
		}

		if ( pageBreakBeforeCombo.getSelectionIndex( ) == -1
				&& pageBreakAfterCombo.getSelectionIndex( ) == -1 )
		{
			return false;
		}

		return true;
	}

	private boolean isInLevelList( LevelViewHandle level )
	{
		List list = new ArrayList( );
		if ( reportItemHandle.getCrosstabView( axis ) != null )
		{
			CrosstabViewHandle crosstabView = reportItemHandle.getCrosstabView( axis );
			list = getLevel( crosstabView );
		}
		if ( list.indexOf( level ) != -1 )
		{
			return true;
		}

		return false;

	}

	private List getLevel( CrosstabViewHandle crosstabViewHandle )
	{
		List list = new ArrayList( );
		if ( crosstabViewHandle == null )
		{
			return list;
		}
		int dimensionCount = crosstabViewHandle.getDimensionCount( );

		for ( int i = 0; i < dimensionCount; i++ )
		{
			DimensionViewHandle dimension = crosstabViewHandle.getDimension( i );
			int levelCount = dimension.getLevelCount( );
			for ( int j = 0; j < levelCount; j++ )
			{
				LevelViewHandle levelHandle = dimension.getLevel( j );
				ExtendedItemHandle ext = (ExtendedItemHandle) levelHandle.getModelHandle( );
				PropertyHandle before = ext.getPropertyHandle( ILevelViewConstants.PAGE_BREAK_BEFORE_PROP );
				PropertyHandle after = ext.getPropertyHandle( ILevelViewConstants.PAGE_BREAK_AFTER_PROP );
				if ( ( before != null && before.isLocal( ) )
						|| ( after != null && after.isLocal( ) ) )
				{
					list.add( levelHandle );
				}
			}
		}
		return list;
	}

	/**
	 * Refreshes the OK button state.
	 * 
	 */
	protected void updateButtons( )
	{
		getOkButton( ).setEnabled( isConditionOK( ) );
	}

	protected Listener updateButtonListener = new Listener( ) {

		public void handleEvent( Event event )
		{
			updateButtons( );

		}

	};
}
