/*

 * 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: 

 *

 */

package com.nokia.carbide.cpp.internal.pi.button.ui;

import java.util.ArrayList;

import java.util.Set;

import org.eclipse.jface.viewers.IBaseLabelProvider;

import org.eclipse.jface.viewers.ISelection;

import org.eclipse.jface.viewers.ITreeContentProvider;

import org.eclipse.jface.viewers.ITreeSelection;

import org.eclipse.jface.viewers.LabelProvider;

import org.eclipse.jface.viewers.TreeViewer;

import org.eclipse.jface.viewers.Viewer;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.events.SelectionListener;

import org.eclipse.swt.widgets.Composite;

import com.nokia.carbide.cpp.pi.button.BupEventMapManager;

import com.nokia.carbide.cpp.pi.button.IBupEventMapProfile;

import com.nokia.carbide.cpp.sdk.core.ISymbianSDK;

public class BupProfileTreeViewer extends TreeViewer {

	private static final String WORKSPACE_PREF = Messages.getString("BupProfileTreeViewer.0"); //$NON-NLS-1$

	private static final String CARBIDE_BUILTIN = Messages.getString("BupProfileTreeViewer.1"); //$NON-NLS-1$

	private ISymbianSDK romKit;

	private Set<ISymbianSDK> appKits;

	private ISelection lastValidSelection;

	public class BupProfileTreeData {

		private ISymbianSDK romSdk;

		private Set<ISymbianSDK> appSdks;

		public BupProfileTreeData(ISymbianSDK rom, Set<ISymbianSDK> app) {

			romSdk = rom;

			appSdks = app;

		}

		public ISymbianSDK getRomSdk() {

			return romSdk;

		}

		public Set<ISymbianSDK> getAppSdk() {

			return appSdks;

		}

	}

	public class BupProfileTreeContentProvider implements ITreeContentProvider {

		/* (non-Javadoc)

		 * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)

		 */

		public Object[] getChildren(Object arg0) {

			if (arg0 instanceof String) {

				if (((String)arg0).equals(WORKSPACE_PREF)) {

					ArrayList<IBupEventMapProfile> workspaceProfiles = BupEventMapManager.getInstance().getProfilesFromWorkspacePref();

					return workspaceProfiles.toArray();

				}

				if (((String)arg0).equals(CARBIDE_BUILTIN)) {

					ArrayList<IBupEventMapProfile> builtinProfiles = BupEventMapManager.getInstance().getProfilesFromBuiltin();

					return builtinProfiles.toArray();

				}

			}

			if (arg0 instanceof ISymbianSDK) {

				ArrayList<IBupEventMapProfile> sdkProfile = BupEventMapManager.getInstance().getProfilesFromSDK((ISymbianSDK)arg0);

				return sdkProfile.toArray();

			}

			return null;

		}

		/* (non-Javadoc)

		 * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)

		 */

		public Object getParent(Object arg0) {

			// not implemented

			return null;

		}

		/* (non-Javadoc)

		 * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)

		 */

		public boolean hasChildren(Object arg0) {

			if (arg0 instanceof String) {

				if (((String)arg0).equals(WORKSPACE_PREF) || ((String)arg0).equals(CARBIDE_BUILTIN)) {

					return true;

				}

			}

			if (arg0 instanceof ISymbianSDK) {

				return true;

			}

			return false;

		}

		/* (non-Javadoc)

		 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)

		 */

		public Object[] getElements(Object arg0) {

			ArrayList<Object> elements = new ArrayList<Object>();

			if (romKit != null) {

				if (getChildren(romKit).length > 0) {

					elements.add(romKit);

				}

			}

			ISymbianSDK [] appSdks = appKits.toArray(new ISymbianSDK[appKits.size()]);

			for (ISymbianSDK sdk : appSdks) {

				if (getChildren(sdk).length > 0) {

					elements.add(sdk);

				}

			}

			elements.add(WORKSPACE_PREF);

			elements.add(CARBIDE_BUILTIN);

			return elements.toArray();

		}

		/* (non-Javadoc)

		 * @see org.eclipse.jface.viewers.IContentProvider#dispose()

		 */

		public void dispose() {

		}

		/* (non-Javadoc)

		 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)

		 */

		public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

			if (newInput instanceof BupProfileTreeData) {

				BupProfileTreeData data = (BupProfileTreeData)newInput;

				romKit = data.romSdk;

				appKits = data.appSdks;

			}

		}

	}

	private class BupProfileTreeLabelProvider extends LabelProvider implements IBaseLabelProvider{

		public String getText(Object element) {

			if (element instanceof IBupEventMapProfile) {

				return ((IBupEventMapProfile)element).getProfileId();

			}

			if (element instanceof String) {

				if (((String)element).equals(WORKSPACE_PREF)) {

					return (String)element;

				}

				if (((String)element).equals(CARBIDE_BUILTIN)) {

					return (String)element;

				}

			}

			if (element instanceof ISymbianSDK) {

				return Messages.getString("BupProfileTreeViewer.2") + ((ISymbianSDK)element).getUniqueId(); //$NON-NLS-1$

			}

			return ""; //$NON-NLS-1$

		}

	}

	/**

	 * @param parent

	 * @param style

	 */

	public BupProfileTreeViewer(Composite parent) {

		super(parent, SWT.SINGLE | SWT.FULL_SELECTION | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);

		setContentProvider(new BupProfileTreeContentProvider());

		setLabelProvider(new BupProfileTreeLabelProvider());

		final BupProfileTreeViewer viewerSelf = this;

		this.getTree().addSelectionListener(new SelectionListener() {

			public void widgetDefaultSelected(SelectionEvent arg0) {

			}

			public void widgetSelected(SelectionEvent arg0) {

				Object data = arg0.item.getData();

				if (!(data instanceof IBupEventMapProfile)) {

					// we are a SWT.SINGLE, so we select last good selection canceling this one,

					// it behaves like last valid selection stick 

					viewerSelf.setSelection(lastValidSelection);

				} else {

					// remember last valid selection

					lastValidSelection = viewerSelf.getSelection();

				}

			}

		});

	}

	/**

	 * Handy routine for reading selection

	 * 

	 * @return

	 */

	public IBupEventMapProfile getSelectedProfile() {

		if (getSelection().isEmpty()) {

			return null;

		} else {

			ISelection selection = getSelection();

			if (selection instanceof ITreeSelection) {

				Object firstElement = ((ITreeSelection)selection).getFirstElement();

				if (firstElement instanceof IBupEventMapProfile) {

					return (IBupEventMapProfile)firstElement;

				}

			}

		}

		return null;

	}

}