/**
 * Copyright (c) 2003-2005 Craig Setera
 * All Rights Reserved.
 * Licensed under the Eclipse Public License - v 1.0
 * For more information see http://www.eclipse.org/legal/epl-v10.html
 */
package eclipseme.ui.internal.wizards;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

import eclipseme.core.internal.EclipseMECorePlugin;
import eclipseme.core.model.device.DeviceRegistry;
import eclipseme.core.model.device.IDevice;
import eclipseme.core.model.impl.MidletSuiteProject;
import eclipseme.core.persistence.PersistenceException;
import eclipseme.ui.devices.DeviceSelector;

/**
 * Wizard page used to define the initial properties
 * for the created Midlet suite.
 * <p />
 * Copyright (c) 2003-2005 Craig Setera<br>
 * All Rights Reserved.<br>
 * Licensed under the Eclipse Public License - v 1.0<p/>
 * <br>
 * $Revision: 1.2 $
 * <br>
 * $Date: 2006/02/11 21:27:11 $
 * <br>
 * @author Craig Setera
 */
public class MidletSuitePropertiesWizardPage extends WizardPage 
{
	/** The key used to register this page in the wizard */
	public static final String PAGE_NAME = "MidletSuiteProperties";
	
	// Widget variables
	private DeviceSelector deviceSelector;
	private Text jadFileNameText;
	private boolean jadNameInitialized;
	
	/**
	 * Constructor
	 * 
	 * @param pageName
	 */
	public MidletSuitePropertiesWizardPage() {
		super(PAGE_NAME);
		setTitle("Midlet Suite Properties");
		setDescription("Choose the initial properties for the Midlet Suite.");
	}

	/**
	 * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)
	 */
	public void createControl(Composite parent) {
		Font font = parent.getFont();
		
		Composite composite = new Composite(parent, SWT.NONE);
		composite.setFont(font);	
		setControl(composite);
		initializeDialogUnits(parent);

		composite.setLayout(new GridLayout(3, false));
		composite.setLayoutData(new GridData(GridData.FILL_BOTH));

		// Create the device selection controls
		deviceSelector = new DeviceSelector();
		deviceSelector.createContents(composite, true);
		deviceSelector.setSelectionChangedListener(new ISelectionChangedListener() {
			public void selectionChanged(SelectionChangedEvent event) {
				updateStatus();
			}
		});
		
		(new Label(composite, SWT.NONE)).setText("Application Descriptor:");
		jadFileNameText = new Text(composite, SWT.BORDER);
		jadFileNameText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
		jadFileNameText.addModifyListener(new ModifyListener() {
			public void modifyText(ModifyEvent e) {
				updateStatus();
			}
		});
		
		updateStatus();
	}

	/**
	 * @see org.eclipse.jface.dialogs.DialogPage#dispose()
	 */
	public void dispose() {
		deviceSelector.dispose();
		super.dispose();
	}

    /**
     * Return the device selected by the user.
     * 
     * @return
     */
    public IDevice getSelectedDevice() {
    	return deviceSelector.getSelectedDevice();
    }
    
    /**
     * Return the JAD file name specified by the user.
     * 
     * @return
     */
    public String getJadFileName() {
    	return jadFileNameText.getText();
    }
	
	/**
	 * @see org.eclipse.jface.dialogs.IDialogPage#setVisible(boolean)
	 */
	public void setVisible(boolean visible) {
		if (visible) {			
			if (!jadNameInitialized) {
				jadFileNameText.setText(getDefaultJadName());
				jadNameInitialized = true;
			}
		}
		
		super.setVisible(visible);
	}
	
	/**
	 * Return the default JAD file name.
	 * 
	 * @return
	 */
	private String getDefaultJadName() {
		IProject project = ((NewJ2MEProjectWizard) getWizard()).getCreatedProjectHandle();
		return MidletSuiteProject.getDefaultJadFileName(project);
	}
	
	/**
	 * Set the status based on the current values on the page.
	 */
	private void updateStatus() {
    	String message = null;
    	
		DeviceRegistry registry = DeviceRegistry.singleton;
		
    	int deviceCount = 0;
    	try {
			deviceCount = registry.getDeviceCount();
		} catch (PersistenceException e) {
			EclipseMECorePlugin.log(IStatus.WARNING, "Error retrieving device count", e);
		}
		
		if (deviceCount == 0) {
			message = "There are no devices defined.\n Please use device management to create some devices.";
		} else if (getSelectedDevice() == null) {
			message = "No Device Selected";
		} else {
	    	String jadFileName = getJadFileName();
	    	if (jadFileName.length() == 0) {
	    		message = "JAD file name must be specified";
	    	} else if (jadFileName.charAt(0) == '/') {
	    		message = "JAD file name must be relative and must not start with '/'";
	    	} else if (jadFileName.charAt(0) == '\\') {
	    		message = "JAD file name must be relative and must not start with '\'";
	    	} else if (!jadFileName.endsWith(".jad")) {
	    		message = "JAD file name must end with .jad";
	    	}
		}
		
   		setErrorMessage(message);
   		setPageComplete(message == null);
	}
}