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/**
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* Copyright (C) 2018 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.editor.descriptiveDataSet.matrix;
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import java.util.Comparator;
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import eu.etaxonomy.cdm.api.service.dto.RowWrapperDTO;
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import eu.etaxonomy.cdm.model.common.MarkerType;
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import eu.etaxonomy.cdm.model.description.DescriptionBase;
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import eu.etaxonomy.cdm.model.description.SpecimenDescription;
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import eu.etaxonomy.cdm.model.description.TaxonDescription;
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import eu.etaxonomy.cdm.model.taxon.TaxonNaturalComparator;
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import eu.etaxonomy.cdm.model.taxon.TaxonNode;
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import eu.etaxonomy.cdm.model.taxon.TaxonNodeByNameComparator;
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import eu.etaxonomy.cdm.model.taxon.TaxonNodeByRankAndNameComparator;
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import eu.etaxonomy.taxeditor.preference.PreferencesUtil;
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/**
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 * @author pplitzner
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 * @since Jan 25, 2018
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 *
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 */
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public class MatrixRowComparator implements Comparator<Object>{
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    private Comparator<TaxonNode> comparator;
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    public MatrixRowComparator() {
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        if (PreferencesUtil.isNodesSortedNaturally()){
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            comparator = new TaxonNaturalComparator();
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        } else if (PreferencesUtil.isNodesSortedByName()){
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            comparator = new TaxonNodeByNameComparator();
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        }else {
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            comparator = new TaxonNodeByRankAndNameComparator();
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        }
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    }
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    @Override
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    public int compare(Object o1, Object o2) {
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        if(o1 instanceof TaxonNode){
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            if(o2 instanceof RowWrapperDTO){
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                return 1;
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            }
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        }
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        else{
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            if(o2 instanceof TaxonNode){
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                return -1;
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            }
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        }
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        if(o1 instanceof TaxonNode && o2 instanceof TaxonNode){
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            return comparator.compare((TaxonNode)o1, (TaxonNode)o2);
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        }
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        if(o1 instanceof RowWrapperDTO && o2 instanceof RowWrapperDTO){
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            RowWrapperDTO rowWrapper1 = (RowWrapperDTO)o1;
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            RowWrapperDTO rowWrapper2 = (RowWrapperDTO)o2;
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            //check for equality
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            if(rowWrapper1.equals(rowWrapper2)){
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                return 0;
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            }
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            TaxonNode node1 = rowWrapper1.getTaxonNode().getParent();
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            TaxonNode node2 = rowWrapper2.getTaxonNode().getParent();
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            if(node1!=null && node2!=null){
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                //compare by taxon node
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                int compare = comparator.compare(node1, node2);
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                if(compare!=0){
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                    return compare;
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                }
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                DescriptionBase description1 = rowWrapper1.getDescription();
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                DescriptionBase description2 = rowWrapper2.getDescription();
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                //compare by taxon description type
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                if(description1 instanceof TaxonDescription){
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                    if(description2 instanceof SpecimenDescription){
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                        return -1;
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                    }
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                }
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                else{
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                    if(description2 instanceof TaxonDescription){
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                        return 1;
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                    }
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                }
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                //both descriptions are of the same type
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                if(description1 instanceof SpecimenDescription){
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                    //description2 has to also be a SpecimenDescription
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                    SpecimenDescription specimenDescription1 = (SpecimenDescription)description1;
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                    SpecimenDescription specimenDescription2 = (SpecimenDescription)description2;
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                    int id1 = specimenDescription1.getDescribedSpecimenOrObservation().getId();
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                    int id2 = specimenDescription2.getDescribedSpecimenOrObservation().getId();
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                    return id1-id2;
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                }
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                else if(description1 instanceof TaxonDescription){
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                    //description2 has to also be a TaxonDescription
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                    TaxonDescription taxonDescription1 = (TaxonDescription)description1;
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                    TaxonDescription taxonDescription2 = (TaxonDescription)description2;
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                    boolean isComputed1 = taxonDescription1.getMarkers().stream()
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                            .anyMatch(marker -> marker.getMarkerType().equals(MarkerType.COMPUTED()));
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                    boolean isComputed2 = taxonDescription2.getMarkers().stream()
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                            .anyMatch(marker -> marker.getMarkerType().equals(MarkerType.COMPUTED()));
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                    if(isComputed1){
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                        if(!isComputed2){
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                            return -1;
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                        }
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                    }
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                    if(isComputed2){
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                        return 1;
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                    }
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                    //TODO: implement compare for different description types
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                }
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            }
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        }
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        return o1.hashCode()-o2.hashCode();
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    }
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}
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