/*******************************************************************************

 * Copyright (c) 2009 Symbian Foundation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Symbian Foundation - initial contribution.

 * Contributors:

 * Description:

 * Overview:

 * Details:

 * Platforms/Drives/Compatibility:

 * Assumptions/Requirement/Pre-requisites:

 * Failures and causes:

 *******************************************************************************/

package org.symbian.tools.tmw.debug.ui.launch;

import java.util.LinkedList;

import org.eclipse.core.resources.IProject;

import org.eclipse.core.resources.IResource;

import org.eclipse.core.resources.ResourcesPlugin;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.debug.core.ILaunchConfiguration;

import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;

import org.eclipse.debug.ui.AbstractLaunchConfigurationTab;

import org.eclipse.jface.viewers.ArrayContentProvider;

import org.eclipse.jface.viewers.ComboViewer;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.ISelectionChangedListener;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.SelectionChangedEvent;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.swt.SWT;

import org.eclipse.swt.graphics.Image;

import org.eclipse.swt.layout.FormAttachment;

import org.eclipse.swt.layout.FormData;

import org.eclipse.swt.layout.FormLayout;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Label;

import org.eclipse.ui.model.WorkbenchLabelProvider;

import org.symbian.tools.tmw.debug.internal.Activator;

import org.symbian.tools.tmw.debug.internal.ChromeDebugUtils;

import org.symbian.tools.tmw.debug.internal.IConstants;

import org.symbian.tools.tmw.debug.internal.Images;

public class WidgetBasicTab extends AbstractLaunchConfigurationTab {

	private ComboViewer project;

	private boolean canSave;

	@Override

	public Image getImage() {

		return Images.getWrtIconImage();

	}

	public void createControl(Composite parent) {

		Composite root = new Composite(parent, SWT.NONE);

		FormLayout layout = new FormLayout();

		layout.marginWidth = 5;

		layout.marginHeight = 5;

		layout.spacing = 5;

		root.setLayout(layout);

		Label label = new Label(root, SWT.NONE);

		label.setText("WRT Widget Project:");

		project = new ComboViewer(root, SWT.READ_ONLY);

		project.setContentProvider(new ArrayContentProvider());

		project.setLabelProvider(new WorkbenchLabelProvider());

		FormData formData = new FormData();

		formData.left = new FormAttachment(label);

		formData.right = new FormAttachment(100, 0);

		project.getControl().setLayoutData(formData);

		project.setInput(getWidgetProjects());

		project.addSelectionChangedListener(new ISelectionChangedListener() {

			public void selectionChanged(SelectionChangedEvent event) {

				setDirty(true);

				validate();

			}

		});

		setControl(root);

	}

	private IProject[] getWidgetProjects() {

		IProject[] projects = ResourcesPlugin.getWorkspace().getRoot()

				.getProjects();

		LinkedList<IProject> filtered = new LinkedList<IProject>();

		for (IProject p : projects) {

				filtered.add(p);

			}

		}

		return filtered.toArray(new IProject[filtered.size()]);

	}

	public String getName() {

		return "WRT Widget";

	}

	public void initializeFrom(ILaunchConfiguration configuration) {

		project.setSelection(getSelectedProject(configuration), true);

		validate();

		setErrorMessage(null);

	}

	private ISelection getSelectedProject(ILaunchConfiguration configuration) {

		ISelection selected = StructuredSelection.EMPTY;

		try {

			String projectName = configuration.getAttribute(

					IConstants.PROP_PROJECT_NAME, (String) null);

			if (projectName != null) {

				IProject p = ResourcesPlugin.getWorkspace().getRoot()

						.getProject(projectName);

				if (p.isAccessible()) {

					selected = new StructuredSelection(p);

				}

			}

		} catch (CoreException e) {

			Activator.log(e);

		}

		return selected;

	}

	@Override

	public boolean canSave() {

		return canSave;

	}

	private void validate() {

		String error = null;

		if (getWidgetProjects().length == 0) {

			error = "No WRT widget projects found in the workspace";

		} else if (project.getSelection().isEmpty()) {

			error = "Select WRT widget project to debug";

		} else if (ChromeDebugUtils.getChromeExecutible() == null) {

			error = "No Chrome browser configured in the preferences";

		}

		canSave = error == null;

		setErrorMessage(error);

		getLaunchConfigurationDialog().updateButtons();

	}

	public void performApply(ILaunchConfigurationWorkingCopy configuration) {

		ISelection selection = project.getSelection();

		if (selection.isEmpty()) {

			setDefaults(configuration);

		} else {

			IProject p = (IProject) ((IStructuredSelection) selection)

					.getFirstElement();

			configuration.setAttribute(IConstants.PROP_PROJECT_NAME, p

					.getName());

			configuration.setMappedResources(new IResource[] { p });

		}

	}

	public void setDefaults(ILaunchConfigurationWorkingCopy configuration) {

		configuration.removeAttribute(IConstants.PROP_PROJECT_NAME);

	}

	@Override

	public boolean isValid(ILaunchConfiguration launchConfig) {

		return !getSelectedProject(launchConfig).isEmpty();

	}

}