/*=============================================================================#
 # Copyright (c) 2013, 2019 Stephan Wahlbrink and others.
 # 
 # This program and the accompanying materials are made available under the
 # terms of the Eclipse Public License 2.0 which is available at
 # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.internal.r.ui.dataeditor;

import static org.eclipse.statet.ecommons.waltable.coordinate.Orientation.HORIZONTAL;
import static org.eclipse.statet.ecommons.waltable.coordinate.Orientation.VERTICAL;

import org.eclipse.core.databinding.UpdateValueStrategy;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.databinding.observable.value.WritableValue;
import org.eclipse.jface.databinding.swt.typed.WidgetProperties;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

import org.eclipse.statet.ecommons.databinding.core.validation.LongValidator;
import org.eclipse.statet.ecommons.databinding.jface.DataBindingSupport;
import org.eclipse.statet.ecommons.ui.dialogs.ExtStatusDialog;
import org.eclipse.statet.ecommons.ui.util.LayoutUtils;
import org.eclipse.statet.ecommons.waltable.coordinate.LRange;
import org.eclipse.statet.ecommons.waltable.coordinate.Orientation;
import org.eclipse.statet.ecommons.waltable.viewport.IViewportDim;

import org.eclipse.statet.r.ui.dataeditor.RDataTableComposite;


public class GotoCellDialog extends ExtStatusDialog {
	
	
	private final RDataTableComposite table;
	
	private final Text[] indexControls= new Text[2];
	
	private final LRange[] indexRanges= new LRange[2]; // 0-based
	
	@SuppressWarnings("unchecked")
	private final IObservableValue<Long>[] indexValues= new IObservableValue[2]; // 1-based
	
	
	public GotoCellDialog(final RDataTableComposite table) {
		super(table.getShell(), WITH_DATABINDING_CONTEXT);
		
		this.table= table;
		
		setTitle("Go to Cell");
		setBlockOnOpen(true);
		setStatusLineAboveButtons(true);
		setHelpAvailable(false);
		
		for (final Orientation orientation : Orientation.values()) {
			final IViewportDim viewportDim= this.table.getViewport(orientation);
			this.indexRanges[orientation.ordinal()]= new LRange(
					viewportDim.getMinimumOriginPosition(),
					viewportDim.getScrollable().getPositionCount() );
			this.indexValues[orientation.ordinal()]= new WritableValue<>(
					Long.valueOf(viewportDim.getOriginPosition() + 1), Long.TYPE );
		}
	}
	
	
	@Override
	protected Control createDialogArea(final Composite parent) {
		final Composite composite= new Composite(parent, SWT.NONE);
		composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
		composite.setLayout(LayoutUtils.newDialogGrid(2));
		
		{	final Label label= new Label(composite, SWT.NONE);
			label.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false));
			label.setText("&Row index:");
			
			final Text text= new Text(composite, SWT.BORDER | SWT.SINGLE);
			text.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false));
			this.indexControls[VERTICAL.ordinal()]= text;
		}
		{	final Label label= new Label(composite, SWT.NONE);
			label.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false));
			label.setText("Co&lumn index:");
			
			final Text text= new Text(composite, SWT.BORDER | SWT.SINGLE);
			final GridData gd= new GridData(SWT.FILL, SWT.CENTER, true, false);
			gd.widthHint= LayoutUtils.hintWidth(text, 25);
			text.setLayoutData(gd);
			this.indexControls[HORIZONTAL.ordinal()]= text;
		}
		
		applyDialogFont(composite);
		return composite;
	}
	
	@Override
	protected void addBindings(final DataBindingSupport db) {
		for (final Orientation orientation : Orientation.values()) {
			final LRange lRange= this.indexRanges[orientation.ordinal()];
			db.getContext().bindValue(
					WidgetProperties.text(SWT.Modify)
							.observe(this.indexControls[orientation.ordinal()]),
					this.indexValues[orientation.ordinal()],
					new UpdateValueStrategy()
							.setAfterGetValidator(new LongValidator(
									(lRange.start + 1), lRange.end,
									"Invalid " + getLabel(orientation) + " index (" + (lRange.start + 1) + "\u2013" + lRange.end + ").")),
					null );
			this.indexControls[orientation.ordinal()].selectAll();
		}
	}
	
	protected String getLabel(final Orientation orientation) {
		return (orientation == HORIZONTAL) ? "column" : "row";
	}
	
	
	public void set(final Orientation orientation, final long idx) {
		if (this.indexRanges[orientation.ordinal()].contains(idx)) {
			this.indexValues[orientation.ordinal()].setValue(Long.valueOf(idx + 1));
		}
	}
	
	public long get(final Orientation orientation) {
		return this.indexValues[orientation.ordinal()].getValue().longValue() - 1;
	}
	
}