/*

* Copyright (c) 2009 Nokia Corporation 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:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

/* START_USECASES: CU2 END_USECASES */

package com.nokia.carbide.cpp.uiq.ui.viewwizard;

import com.nokia.sdt.symbian.cproject.CProjectUtils;

import com.nokia.sdt.symbian.workspace.SymbianProjectUtils;

import com.nokia.sdt.symbian.workspace.SymbianProjectUtils.EUIQProjectType;

import com.nokia.cpp.internal.api.utils.core.Check;

import org.eclipse.cdt.core.model.ICElement;

import org.eclipse.cdt.core.model.ICProject;

import org.eclipse.core.resources.IProject;

import org.eclipse.core.resources.ResourcesPlugin;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.swt.widgets.Combo;

import org.eclipse.swt.widgets.Composite;

import java.util.*;

public class ProjectsComboWidget {

	static final String NONE_TEXT = Messages.getString("ProjectsComboWidget.NO_PROJECT"); //$NON-NLS-1$

	Map displayNameToProject = new HashMap();

	IStructuredSelection selectedResources;

	Combo combo;

	public ProjectsComboWidget(Composite parent, int style, IStructuredSelection selectedResources) {

		combo = new Combo(parent, style);

		this.selectedResources = selectedResources;

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

		for (int i = 0; i < projects.length; i++) {

			IProject project = projects[i];

			if (isEligibleProject(project))

				displayNameToProject.put(getDisplayName(project), project);

		}

		if (!displayNameToProject.isEmpty()) {

			String[] displayNames = getDisplayNames();

			combo.setItems(displayNames);

			combo.select(getDefaultProjectIndex(displayNames));

		}

		else {

			combo.setItems(new String[] { NONE_TEXT } );

			combo.setEnabled(false);

		}

	}

	private boolean isEligibleProject(IProject project) {

		EUIQProjectType uiqProjectType = SymbianProjectUtils.getUIQProjectType(project);

		return uiqProjectType != EUIQProjectType.NotUIQ;

	}

	private String getDisplayName(IProject project) {

		return project.getName();

	}

	private String[] getDisplayNames() {

		Collection displayNames = displayNameToProject.keySet();

		return (String[]) displayNames.toArray(new String[displayNames.size()]);

	}

	private String getDefaultProjectDisplayName(IStructuredSelection selection) {

		if (selection == null)

			return null;

		ICElement celem = CProjectUtils.getInitialCElement(selection);

        if (celem != null) {

            ICProject cproject = celem.getCProject();

            if (cproject != null) {

            	return getDisplayName(cproject.getProject());

            }

        }

		return null;

	}

    public IProject getProjectFromDisplayName(String displayName) {

		Check.checkContract(displayNameToProject.containsKey(displayName));

		return (IProject) displayNameToProject.get(displayName);

	}

	private int getDefaultProjectIndex(String[] displayNames) {

		String defaultDisplayName = getDefaultProjectDisplayName(selectedResources);

		for (int i = 0; i < displayNames.length; i++) {

			if (displayNames[i].equals(defaultDisplayName))

				return i;

		}

		return -1;

	}

	public boolean isValid() {

    	return !displayNameToProject.isEmpty() && (combo.getSelectionIndex() >= 0);

	}

	public String getErrorString() {

    	if (displayNameToProject.isEmpty()) {

    		return Messages.getString("ProjectsComboWidget.NoEligibleProjectsError"); //$NON-NLS-1$

    	}

        if (combo.getSelectionIndex() < 0) {

            return Messages.getString("ProjectsComboWidget.SelectProjectPrompt"); //$NON-NLS-1$

        }

        return null;

	}

	/**

	 * @return the Combo control

	 */

	public Combo getControl() {

		return combo;

	}

	/**

	 * @return the text of the combo

	 */

	public String getText() {

		return combo.getText();

	}

}