EDIT

// $Id$

/**

 * Copyright (C) 2007 EDIT

 * European Distributed Institute of Taxonomy 

 * http://www.e-taxonomy.eu

 * 

 * The contents of this file are subject to the Mozilla Public License Version 1.1

 * See LICENSE.TXT at the top of this package for the full license terms.

 */

package eu.etaxonomy.taxeditor.io.wizard;

import java.lang.reflect.Method;

import java.util.ArrayList;

import java.util.List;

import java.util.MissingResourceException;

import java.util.ResourceBundle;

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.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import eu.etaxonomy.cdm.io.common.IIoConfigurator;

import eu.etaxonomy.taxeditor.store.StoreUtil;

/**

 * <p>

 * GenericConfiguratorWizardPage class.

 * </p>

 * 

 * @author n.hoffmann

 * @created 23.06.2009

 * @version 1.0

 */

public class GenericConfiguratorWizardPage extends WizardPage {

	private final IIoConfigurator configurator;

	private final ResourceBundle resourceBundle;

	/**

	 * @param pageName

	 * @param configurator

	 */

	private GenericConfiguratorWizardPage(String pageName,

			IIoConfigurator configurator, String title, String description) {

		super(pageName);

		this.setTitle(title);

		this.setDescription(description);

		this.configurator = configurator;

		resourceBundle = getResourceBundle(configurator);

	}

	private ResourceBundle getResourceBundle(IIoConfigurator configurator){

		try{

			return ResourceBundle.getBundle(configurator.getClass().getName());

		}catch(MissingResourceException e){

			return null;

		}

	}

	/**

	 * <p>

	 * Import

	 * </p>

	 * 

	 * @param pageName

	 *            a {@link java.lang.String} object.

	 * @param configurator

	 *            a {@link eu.etaxonomy.cdm.io.common.IIoConfigurator} object.

	 * @return a

	 *         {@link eu.etaxonomy.taxeditor.io.wizard.GenericConfiguratorWizardPage}

	 *         object.

	 */

	public static GenericConfiguratorWizardPage Import(String pageName,

			IIoConfigurator configurator) {

		return new GenericConfiguratorWizardPage(pageName, configurator,

				"Import Configuration", "Configure the import mechanism.");

	}

	/**

	 * <p>

	 * Export

	 * </p>

	 * 

	 * @param pageName

	 *            a {@link java.lang.String} object.

	 * @param configurator

	 *            a {@link eu.etaxonomy.cdm.io.common.IIoConfigurator} object.

	 * @return a

	 *         {@link eu.etaxonomy.taxeditor.io.wizard.GenericConfiguratorWizardPage}

	 *         object.

	 */

	public static GenericConfiguratorWizardPage Export(String pageName,

			IIoConfigurator configurator) {

		return new GenericConfiguratorWizardPage(pageName, configurator,

				"Export Configuration", "Configure the export mechanism.");

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see

	 * org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets

	 * .Composite)

	 */

	/** {@inheritDoc} */

	public void createControl(Composite parent) {

		// ScrolledComposite scrolledComposite = new ScrolledComposite(parent,

		// SWT.H_SCROLL);

		// scrolledComposite.setLayout(new GridLayout());

		// TODO wrap this composite in a scrolled composite

		Composite composite = new Composite(parent, SWT.NULL);

		composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

		GridLayout gridLayout = new GridLayout();

		composite.setLayout(gridLayout);

		List<Method> methods = getConfiguratorsBooleanSetMethods(configurator);

		for (Method method : methods) {

			createCheckbox(composite, method, configurator);

		}

		// scrolledComposite.setContent(composite);

		setControl(composite);

	}

	private void createCheckbox(Composite parent, Method method,

			final IIoConfigurator configurator) {

		final String methodName = method.getName();

		final Button checkBox = new Button(parent, SWT.CHECK);

		checkBox.setText(getLabel(methodName));

		// retrieve the default values and set the checkbox accordingly

		boolean defaultSelection = executeBooleanGetMethod(configurator, "is"

				+ methodName.substring(3));

		checkBox.setSelection(defaultSelection);

		checkBox.addSelectionListener(new SelectionAdapter() {

			/*

			 * (non-Javadoc)

			 * 

			 * @see

			 * org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse

			 * .swt.events.SelectionEvent)

			 */

			@Override

			public void widgetSelected(SelectionEvent e) {

				executeBooleanSetMethod(configurator, methodName,

						checkBox.getSelection());

			}

		});

	}

	private String getLabel(String methodName){

		if(resourceBundle == null){

			return methodName;

		}

		try{

			return resourceBundle.getString(methodName);

		}catch(MissingResourceException e){

			return methodName;

		}

	}

	private boolean executeBooleanGetMethod(IIoConfigurator configurator,

			String methodName) {

		Class<? extends IIoConfigurator> configuratorClass = configurator

				.getClass();

		boolean result = false;

		Method[] methods = configuratorClass.getMethods();

		for (Method method : methods) {

			if (!method.getName().equals(methodName)) {

				continue;

			}

			try {

				Object returnType = method.invoke(configurator, null);

				if (returnType.getClass().equals(Boolean.class)) {

					result = ((Boolean) returnType).booleanValue();

				}

				break;

			} catch (Exception e) {

				StoreUtil.warn(this.getClass(), "Could not invoke method");

			}

		}

		return result;

	}

	private void executeBooleanSetMethod(IIoConfigurator configurator,

			String methodName, boolean selected) {

		Class<? extends IIoConfigurator> configuratorClass = configurator

				.getClass();

		Method[] methods = configuratorClass.getMethods();

		for (Method method : methods) {

			if (!method.getName().equals(methodName)) {

				continue;

			}

			try {

				method.invoke(configurator, selected);

				break;

			} catch (Exception e) {

				StoreUtil.warn(this.getClass(), "Could not invoke method");

			}

		}

	}

	private List<Method> getConfiguratorsBooleanSetMethods(

			IIoConfigurator configurator) {

		List<Method> booleanMethods = new ArrayList<Method>();

		Class<? extends IIoConfigurator> configuratorClass = configurator

				.getClass();

		Method[] allMethods = configuratorClass.getMethods();

		for (Method method : allMethods) {

			if (method.getName().startsWith("set")) {

				Class<?>[] typeList = method.getParameterTypes();

				if (typeList.length > 1) {

					new IllegalStateException(

							"Found a setter with parameter count > 1");

				}

				if (typeList[0].getName().equals("boolean")) {

					booleanMethods.add(method);

				}

			}

		}

		return booleanMethods;

	}

}