/**
 * DataCleaner (community edition)
 * Copyright (C) 2014 Neopost - Customer Information Management
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.datacleaner.beans.stringpattern;

import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import org.datacleaner.api.RendererBean;
import org.datacleaner.result.Crosstab;
import org.datacleaner.result.renderer.AbstractRenderer;
import org.datacleaner.result.renderer.CrosstabTextRenderer;
import org.datacleaner.result.renderer.TextRenderingFormat;

/**
 * Text renderer for {@link PatternFinderResult}s
 *
 *
 */
@RendererBean(TextRenderingFormat.class)
public class PatternFinderResultTextRenderer extends AbstractRenderer<PatternFinderResult, String> {

    @Override
    public String render(final PatternFinderResult result) {
        final CrosstabTextRenderer crosstabTextRenderer = new CrosstabTextRenderer();
        if (result.isGroupingEnabled()) {
            final Map<String, Crosstab<?>> crosstabs = result.getGroupedCrosstabs();
            if (crosstabs.isEmpty()) {
                return "No patterns found";
            }
            final Set<Entry<String, Crosstab<?>>> crosstabEntries = crosstabs.entrySet();
            final StringBuilder sb = new StringBuilder();
            for (final Entry<String, Crosstab<?>> entry : crosstabEntries) {
                final String group = entry.getKey();
                final Crosstab<?> crosstab = entry.getValue();
                if (sb.length() != 0) {
                    sb.append("\n");
                }

                sb.append("Patterns for group: ");
                sb.append(group);
                sb.append('\n');
                sb.append(crosstabTextRenderer.render(crosstab));
            }
            return sb.toString();
        } else {
            final Crosstab<?> crosstab = result.getSingleCrosstab();
            return crosstabTextRenderer.render(crosstab);
        }
    }

}