package org.simantics.xml.sax.ui.datawizard;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.layout.GridDataFactory;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.simantics.utils.ui.ErrorLogger;


public class ImportProcessPage extends WizardPage {
	private Composite composite;
	
	private Button button;
	private Label label;
	
	private boolean doneImport = false;
	private boolean importing = false;
	
	public ImportProcessPage() {
		super("XML Data conversion","Conversion Summary", null);
		setPageComplete(false);
		
	}
	
	public boolean isDoneImport() {
		return doneImport;
	}
	
	@Override
	public void createControl(Composite parent) {
		composite = new Composite(parent, SWT.NONE);
		composite.setLayout(new GridLayout(1,true));
		
		Label fileLabel = new Label(composite, SWT.NONE);
		fileLabel.setText("File: ");
				
		label = new Label(composite, SWT.NONE);
		label.setText("Import has not been started.");
		GridDataFactory.fillDefaults().align(SWT.FILL, SWT.BOTTOM).grab(true, false).applyTo(label);
		button = new Button(composite, SWT.PUSH);
		button.setText("Import");
		GridDataFactory.fillDefaults().align(SWT.RIGHT, SWT.CENTER).applyTo(button);
		button.addSelectionListener(new SelectionAdapter() {
			@Override
			public void widgetSelected(SelectionEvent e) {
				doImport();
				
			}
		});
		setControl(composite);	
	}
	
	private Exception exception;

	private void doImport() {
		button.setEnabled(false);
		label.setText("Import started.");
		importing = true;
		try {
			getWizard().getContainer().run(true, true, new IRunnableWithProgress() {
				
				@Override
				public void run(final IProgressMonitor monitor) throws InvocationTargetException,
						InterruptedException {
					try {
						
						monitor.beginTask("XML Data conversion", IProgressMonitor.UNKNOWN);
						final DataConversionWizard wizard = (DataConversionWizard)getWizard();
						wizard.doConversion();

						
					} catch (final Exception err) {
						exception = err;
					}
					monitor.done();
				}
			});
		} catch (InvocationTargetException err) {
			exception = err;
		} catch (InterruptedException err) {
			exception = err;
		}
		if (exception != null) {
			setErrorMessage("Conversion failed: " + exception.getMessage());
			ErrorLogger.defaultLogError("XML data conversion failed.",exception);
			label.setText("Schema conversion failed.");
		} else {
			label.setText("Schema conversion done.");
		}
		doneImport = true;
		importing = false;
		setPreviousPage(null);
		setPageComplete(true);
		getContainer().updateButtons();
		
	}
	
	public boolean isImporting() {
		return importing;
	}

}