/*
 * Copyright (c) 2010 The Broad Institute
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package org.broadinstitute.sting.gatk.walkers.annotator;

import org.broadinstitute.sting.gatk.contexts.AlignmentContext;
import org.broadinstitute.sting.gatk.contexts.ReferenceContext;
import org.broadinstitute.sting.gatk.refdata.RefMetaDataTracker;
import org.broadinstitute.sting.gatk.walkers.annotator.interfaces.AnnotatorCompatibleWalker;
import org.broadinstitute.sting.gatk.walkers.annotator.interfaces.InfoFieldAnnotation;
import org.broadinstitute.sting.utils.codecs.vcf.VCFHeaderLineCount;
import org.broadinstitute.sting.utils.codecs.vcf.VCFHeaderLineType;
import org.broadinstitute.sting.utils.codecs.vcf.VCFInfoHeaderLine;
import org.broadinstitute.sting.utils.variantcontext.Genotype;
import org.broadinstitute.sting.utils.variantcontext.VariantContext;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * List all of the polymorphic samples.
 */
public class SampleList extends InfoFieldAnnotation {

    public Map<String, Object> annotate(RefMetaDataTracker tracker, AnnotatorCompatibleWalker walker, ReferenceContext ref, Map<String, AlignmentContext> stratifiedContexts, VariantContext vc) {
        if ( vc.isMonomorphicInSamples() || !vc.hasGenotypes() )
            return null;

        StringBuffer samples = new StringBuffer();
        for ( Genotype genotype : vc.getGenotypesOrderedByName() ) {
            if ( genotype.isCalled() && !genotype.isHomRef() ){
                if ( samples.length() > 0 )
                    samples.append(",");
                samples.append(genotype.getSampleName());
            }
        }

        if ( samples.length() == 0 )
            return null;

        Map<String, Object> map = new HashMap<String, Object>();
        map.put("Samples", samples.toString());
        return map;
    }

    public List<String> getKeyNames() { return Arrays.asList("Samples"); }

    public List<VCFInfoHeaderLine> getDescriptions() { return Arrays.asList(new VCFInfoHeaderLine("Samples", VCFHeaderLineCount.UNBOUNDED, VCFHeaderLineType.String, "List of polymorphic samples")); }
}
