/*******************************************************************************
 * Copyright (c) 2010 Per Kr. Soreide.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Per Kr. Soreide - initial API and implementation
 *******************************************************************************/
package bndtools.release.ui;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;

import aQute.bnd.differ.Baseline;
import aQute.bnd.differ.Baseline.Info;
import aQute.bnd.service.diff.Delta;

/**
 * @see org.eclipse.jface.viewers.ITreeContentProvider
 */
public class InfoContentProvider implements ITreeContentProvider {

    private boolean showAll = false;

    @Override
    public Object[] getChildren(Object parent) {
        if (parent instanceof List) {
            return ((List<?>) parent).toArray();
        }
        if (parent instanceof Baseline) {
            if (isShowAll()) {
                return ((Baseline) parent).getPackageInfos()
                    .toArray();
            }
            Set<Info> infos = ((Baseline) parent).getPackageInfos();
            List<Info> filteredDiffs = new ArrayList<Info>();
            for (Info info : infos) {
                if (info.packageDiff.getDelta() == Delta.IGNORED || (info.packageDiff.getDelta() == Delta.UNCHANGED && info.olderVersion.equals(info.suggestedVersion))) {
                    continue;
                }
                filteredDiffs.add(info);
            }
            return filteredDiffs.toArray(new Info[0]);

        }

        return new Object[0];
    }

    /*
     * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
     */
    @Override
    public Object getParent(Object item) {
        return null;
    }

    /*
     * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
     */
    @Override
    public boolean hasChildren(Object parent) {
        if (parent instanceof Baseline) {
            return ((Baseline) parent).getPackageInfos()
                .size() > 0;
        }

        return false;
    }

    /*
     * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
     */
    @Override
    public Object[] getElements(Object inputElement) {
        return getChildren(inputElement);
    }

    /*
     * @see org.eclipse.jface.viewers.IContentProvider#dispose()
     */
    @Override
    public void dispose() {}

    /*
     * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object,
     * java.lang.Object)
     */
    @Override
    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {}

    public boolean isShowAll() {
        return showAll;
    }

    public void setShowAll(boolean showAll) {
        this.showAll = showAll;
    }

}
