EDIT

/**

* Copyright (C) 2017 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.api.service.name;

import java.util.ArrayList;

import java.util.Collection;

import java.util.Collections;

import java.util.Comparator;

import java.util.HashMap;

import java.util.LinkedHashMap;

import java.util.LinkedList;

import java.util.List;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Optional;

import java.util.Set;

import java.util.UUID;

import eu.etaxonomy.cdm.api.service.exception.RegistrationValidationException;

import eu.etaxonomy.cdm.api.service.name.TypeDesignationWorkingSet.TypeDesignationWorkingSetType;

import eu.etaxonomy.cdm.compare.name.NullTypeDesignationStatus;

import eu.etaxonomy.cdm.compare.name.TypeDesignationStatusComparator;

import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;

import eu.etaxonomy.cdm.model.common.CdmBase;

import eu.etaxonomy.cdm.model.common.IdentifiableEntity;

import eu.etaxonomy.cdm.model.common.VersionableEntity;

import eu.etaxonomy.cdm.model.name.HomotypicalGroup;

import eu.etaxonomy.cdm.model.name.NameTypeDesignation;

import eu.etaxonomy.cdm.model.name.SpecimenTypeDesignation;

import eu.etaxonomy.cdm.model.name.TaxonName;

import eu.etaxonomy.cdm.model.name.TypeDesignationBase;

import eu.etaxonomy.cdm.model.name.TypeDesignationStatusBase;

import eu.etaxonomy.cdm.model.occurrence.DerivedUnit;

import eu.etaxonomy.cdm.model.occurrence.FieldUnit;

import eu.etaxonomy.cdm.model.occurrence.SpecimenOrObservationBase;

import eu.etaxonomy.cdm.ref.EntityReference;

import eu.etaxonomy.cdm.ref.TypedEntityReference;

import eu.etaxonomy.cdm.strategy.cache.HTMLTagRules;

import eu.etaxonomy.cdm.strategy.cache.TaggedTextBuilder;

/**

 * Manages a collection of {@link TypeDesignationBase type designations} for the same typified name.

 *

 * Type designations are ordered by the base type which is a {@link TaxonName} for {@link NameTypeDesignation NameTypeDesignations} or

 * in case of {@link SpecimenTypeDesignation SpecimenTypeDesignations} the  associate {@link FieldUnit} or the {@link DerivedUnit}

 * if the former is missing. The type designations per base type are furthermore ordered by the {@link TypeDesignationStatusBase}.

 *

 * The TypeDesignationSetManager also provides string representations of the whole ordered set of all

 * {@link TypeDesignationBase TypeDesignations} and of the TypeDesignationWorkingSets:

 * <ul>

 *  <li>{@link #print()}

 *  <li>{@link #getOrderedTypeDesignationWorkingSets()} ... {@link TypeDesignationWorkingSet#getLabel()}

 * </ul>

 * Prior using the representations you need to trigger their generation by calling {@link #buildString()}

 *

 * @author a.kohlbecker

 * @since Mar 10, 2017

 */

public class TypeDesignationSetManager {

    //currently not really in use

    enum NameTypeBaseEntityType{

        NAME_TYPE_DESIGNATION,

        TYPE_NAME;

    }

    private NameTypeBaseEntityType nameTypeBaseEntityType = NameTypeBaseEntityType.NAME_TYPE_DESIGNATION;

    private Map<UUID,TypeDesignationBase<?>> typeDesignations = new HashMap<>();

    private TaxonName typifiedName;

    private Class tdType1;

    /**

     * Sorts the base entities (TypedEntityReference) in the following order:

     *

     * 1. FieldUnits

     * 2. DerivedUnit (in case of missing FieldUnit we expect the base type to be DerivedUnit)

     * 3. NameType

     *

     * {@inheritDoc}

     */

    private Comparator<Entry<TypedEntityReference<? extends VersionableEntity>, TypeDesignationWorkingSet>> entryComparator = (o1,o2)->{

         TypeDesignationWorkingSet ws1 = o1.getValue();

         TypeDesignationWorkingSet ws2 = o2.getValue();

         if (ws1.getWorkingsetType() != ws2.getWorkingsetType()){

             //first specimen types, then name types (very rare case anyway)

             return ws1.getWorkingsetType() == TypeDesignationWorkingSetType.NAME_TYPE_DESIGNATION_WORKINGSET? 1:-1;

         }

         boolean hasStatus1 = !ws1.keySet().contains(null) && !ws1.keySet().contains(NullTypeDesignationStatus.SINGLETON());

         boolean hasStatus2 = !ws2.keySet().contains(null) && !ws2.keySet().contains(NullTypeDesignationStatus.SINGLETON());

         if (hasStatus1 != hasStatus2){

             //first without status as it is difficult to distinguish a non status from a "same" status record if the first record has a status and second has no status

             return hasStatus1? 1:-1;

         }

         //boolean hasStatus1 = ws1.getTypeDesignations(); //.stream().filter(td -> td.getSt);

         Class<?> type1 = o1.getKey().getType();

         Class<?> type2 = o2.getKey().getType();

         if(!type1.equals(type2)) {

             if(type1.equals(FieldUnit.class) || type2.equals(FieldUnit.class)){

                 // FieldUnits first

                 return type1.equals(FieldUnit.class) ? -1 : 1;

             } else {

                 // name types last (in case of missing FieldUnit we expect the base type to be DerivedUnit which comes into the middle)

                 return type2.equals(TaxonName.class) || type2.equals(NameTypeDesignation.class) ? -1 : 1;

             }

         } else {

             return o1.getKey().getLabel().compareTo(o2.getKey().getLabel());

         }

     };

    /**

     * Groups the EntityReferences for each of the TypeDesignations by the according TypeDesignationStatus.

     * The TypeDesignationStatusBase keys are already ordered by the term order defined in the vocabulary.

     */

    private LinkedHashMap<TypedEntityReference<? extends VersionableEntity>, TypeDesignationWorkingSet> orderedByTypesByBaseEntity;

    private List<String> problems = new ArrayList<>();

// **************************** CONSTRUCTOR ***********************************/

    public TypeDesignationSetManager(@SuppressWarnings("rawtypes") Collection<TypeDesignationBase> typeDesignations)

            throws RegistrationValidationException{

    	this(typeDesignations, null);

    }

    public TypeDesignationSetManager(@SuppressWarnings("rawtypes") Collection<TypeDesignationBase> typeDesignations,

            TaxonName typifiedName)

            throws RegistrationValidationException  {

        for (TypeDesignationBase<?> typeDes:typeDesignations){

            this.typeDesignations.put(typeDes.getUuid(), typeDes);

        }

        try {

        	findTypifiedName();

        }catch (RegistrationValidationException e) {

        	if (typifiedName == null) {

        		throw e;

        	}

        	this.typifiedName = typifiedName;

        }

        mapAndSort();

    }

    public TypeDesignationSetManager(HomotypicalGroup group) {

        for (TypeDesignationBase<?> typeDes: group.getTypeDesignations()){

            this.typeDesignations.put(typeDes.getUuid(), typeDes);

        }

        //findTypifiedName();

        mapAndSort();

    }

    public TypeDesignationSetManager(TaxonName typifiedName) {

        this.typifiedName = typifiedName;

    }

// **************************************************************************/

    /**

     * Add one or more TypeDesignations to the manager. This causes re-grouping and re-ordering

     * of all managed TypeDesignations.

     *

     * @param containgEntity

     * @param typeDesignations

     */

    public void addTypeDesigations(TypeDesignationBase<?> ... typeDesignations){

        for (TypeDesignationBase<?> typeDes: typeDesignations){

            this.typeDesignations.put(typeDes.getUuid(), typeDes);

        }

        mapAndSort();

    }

    public TaxonName getTypifiedName() {

        return typifiedName;

    }

    public void setNameTypeBaseEntityType(NameTypeBaseEntityType nameTypeBaseEntityType){

        this.nameTypeBaseEntityType = nameTypeBaseEntityType;

    }

    public NameTypeBaseEntityType getNameTypeBaseEntityType(){

        return nameTypeBaseEntityType;

    }

// ******************************** METHODS *********************************/

    /**

     * Groups and orders all managed TypeDesignations.

     */

    protected void mapAndSort() {

        Map<TypedEntityReference<? extends VersionableEntity>, TypeDesignationWorkingSet> byBaseEntityByTypeStatus = new HashMap<>();

        this.typeDesignations.values().forEach(td -> mapTypeDesignation(byBaseEntityByTypeStatus, td));

        orderedByTypesByBaseEntity = orderByTypeByBaseEntity(byBaseEntityByTypeStatus);

    }

    private void mapTypeDesignation(Map<TypedEntityReference<? extends VersionableEntity>, TypeDesignationWorkingSet> byBaseEntityByTypeStatus,

            TypeDesignationBase<?> td){

        td = HibernateProxyHelper.deproxy(td);

        TypeDesignationStatusBase<?> status = td.getTypeStatus();

        try {

            final VersionableEntity baseEntity = baseEntity(td);

            final TypedEntityReference<? extends VersionableEntity> baseEntityReference = makeEntityReference(baseEntity);

            TaggedTextBuilder workingsetBuilder = new TaggedTextBuilder();

            boolean withCitation = true;

            TypeDesignationSetFormatter.buildTaggedTextForSingleType(td, withCitation, workingsetBuilder, 0);

            @SuppressWarnings({ "unchecked", "rawtypes" })

            TypeDesignationDTO<?> typeDesignationDTO

                = new TypeDesignationDTO(

                    td.getClass(),

                    td.getUuid(),

                    workingsetBuilder.getTaggedText(),

                    getTypeUuid(td));

            if(!byBaseEntityByTypeStatus.containsKey(baseEntityReference)){

                byBaseEntityByTypeStatus.put(baseEntityReference, new TypeDesignationWorkingSet(baseEntity, baseEntityReference));

            }

            byBaseEntityByTypeStatus.get(baseEntityReference).insert(status, typeDesignationDTO);

        } catch (DataIntegrityException e){

            problems.add(e.getMessage());

        }

    }

    /**

     * Returns the uuid of the type designated by this {@link TypeDesignationDTO#}.

     * This is either a TaxonName or a {@link SpecimenOrObservationBase}.

     */

    private UUID getTypeUuid(TypeDesignationBase<?> td) {

        IdentifiableEntity<?> type;

        if (td instanceof SpecimenTypeDesignation){

            type = ((SpecimenTypeDesignation) td).getTypeSpecimen();

        }else if (td instanceof NameTypeDesignation){

            type = ((NameTypeDesignation) td).getTypeName();

        }else{

            type = null;

        }

        return type == null? null : type.getUuid();

    }

    protected VersionableEntity baseEntity(TypeDesignationBase<?> td) throws DataIntegrityException {

        VersionableEntity baseEntity = null;

        if(td instanceof SpecimenTypeDesignation){

            SpecimenTypeDesignation std = (SpecimenTypeDesignation) td;

            FieldUnit fu = findFieldUnit(std.getTypeSpecimen());

            if(fu != null){

                baseEntity = fu;

            } else if(((SpecimenTypeDesignation) td).getTypeSpecimen() != null){

                baseEntity = ((SpecimenTypeDesignation) td).getTypeSpecimen();

            }

        } else if(td instanceof NameTypeDesignation){

            if(nameTypeBaseEntityType == NameTypeBaseEntityType.NAME_TYPE_DESIGNATION){

                baseEntity = td;

            } else {

                // only other option is TaxonName

                baseEntity = ((NameTypeDesignation)td).getTypeName();

            }

        }

        if(baseEntity == null) {

            throw new DataIntegrityException("Incomplete TypeDesignation, no type missin in " + td.toString());

        }

        return baseEntity;

    }

    protected static TypedEntityReference<? extends VersionableEntity> makeEntityReference(VersionableEntity baseEntity) {

        baseEntity = CdmBase.deproxy(baseEntity);

        String label = entityLabel(baseEntity);

        TypedEntityReference<? extends VersionableEntity> baseEntityReference =

                new TypedEntityReference<>(baseEntity.getClass(), baseEntity.getUuid(), label);

        return baseEntityReference;

    }

    //TODO move to formatter?

    protected static String entityLabel(VersionableEntity baseEntity) {

        String label = "";

        if(baseEntity instanceof IdentifiableEntity<?>){

                label = ((IdentifiableEntity<?>)baseEntity).getTitleCache();

        }

        return label;

    }

    private LinkedHashMap<TypedEntityReference<? extends VersionableEntity>, TypeDesignationWorkingSet> orderByTypeByBaseEntity(

            Map<TypedEntityReference<? extends VersionableEntity>,TypeDesignationWorkingSet> stringsByTypeByBaseEntity){

       // order the FieldUnit TypeName keys

       Set<Entry<TypedEntityReference<? extends VersionableEntity>, TypeDesignationWorkingSet>> entrySet

               = stringsByTypeByBaseEntity.entrySet();

       LinkedList<Entry<TypedEntityReference<? extends VersionableEntity>, TypeDesignationWorkingSet>> baseEntityKeyList

               = new LinkedList<>(entrySet);

       Collections.sort(baseEntityKeyList, entryComparator);

       // new LinkedHashMap for the ordered FieldUnitOrTypeName keys

       LinkedHashMap<TypedEntityReference<? extends VersionableEntity>, TypeDesignationWorkingSet> stringsOrderedbyBaseEntityOrderdByType

           = new LinkedHashMap<>(stringsByTypeByBaseEntity.size());

       for(Entry<TypedEntityReference<? extends VersionableEntity>, TypeDesignationWorkingSet> entry : baseEntityKeyList){

           TypedEntityReference<? extends VersionableEntity> baseEntityRef = entry.getKey();

           TypeDesignationWorkingSet typeDesignationWorkingSet = stringsByTypeByBaseEntity.get(baseEntityRef);

           // order the TypeDesignationStatusBase keys

            List<TypeDesignationStatusBase<?>> keyList = new LinkedList<>(typeDesignationWorkingSet.keySet());

            Collections.sort(keyList, new TypeDesignationStatusComparator());

            // new LinkedHashMap for the ordered TypeDesignationStatusBase keys

            TypeDesignationWorkingSet orderedStringsByOrderedTypes = new TypeDesignationWorkingSet(

                    typeDesignationWorkingSet.getBaseEntity());

            keyList.forEach(key -> orderedStringsByOrderedTypes.put(key, typeDesignationWorkingSet.get(key)));

            stringsOrderedbyBaseEntityOrderdByType.put(baseEntityRef, orderedStringsByOrderedTypes);

       }

        return stringsOrderedbyBaseEntityOrderdByType;

    }

    /**

     * FIXME use the validation framework validators to store the validation problems!!!

     *

     * @return

     * @throws RegistrationValidationException

     */

    private void findTypifiedName() throws RegistrationValidationException {

        List<String> problems = new ArrayList<>();

        TaxonName typifiedName = null;

        for(TypeDesignationBase<?> typeDesignation : typeDesignations.values()){

            typeDesignation.getTypifiedNames();

            if(typeDesignation.getTypifiedNames().isEmpty()){

                //TODO instead throw RegistrationValidationException()

                problems.add("Missing typifiedName in " + typeDesignation.toString());

                continue;

            }

            if(typeDesignation.getTypifiedNames().size() > 1){

                //TODO instead throw RegistrationValidationException()

                problems.add("Multiple typifiedName in " + typeDesignation.toString());

                continue;

            }

            if(typifiedName == null){

                // remember

                typifiedName = typeDesignation.getTypifiedNames().iterator().next();

            } else {

                // compare

                TaxonName otherTypifiedName = typeDesignation.getTypifiedNames().iterator().next();

                if(!typifiedName.getUuid().equals(otherTypifiedName.getUuid())){

                    //TODO instead throw RegistrationValidationException()

                    problems.add("Multiple typifiedName in " + typeDesignation.toString());

                }

            }

        }

        if(!problems.isEmpty()){

            // FIXME use the validation framework

            throw new RegistrationValidationException("Inconsistent type designations", problems);

        }

        if(typifiedName != null){

            // ON SUCCESS -------------------

            this.typifiedName = typifiedName;

        }

    }

    /**

     * @return the title cache of the typifying name or <code>null</code>

     */

    public String getTypifiedNameCache() {

        if(typifiedName != null){

            return typifiedName.getTitleCache();

        }

        return null;

    }

    /**

     * @return the title cache of the typifying name or <code>null</code>

     */

    public EntityReference getTypifiedNameAsEntityRef() {

       return new EntityReference(typifiedName.getUuid(), typifiedName.getTitleCache());

    }

    public Collection<TypeDesignationBase<?>> getTypeDesignations() {

        return typeDesignations.values();

    }

    public TypeDesignationBase<?> findTypeDesignation(UUID uuid) {

        return this.typeDesignations.get(uuid);

    }

    public LinkedHashMap<TypedEntityReference<? extends VersionableEntity>, TypeDesignationWorkingSet> getOrderedTypeDesignationWorkingSets() {

        return orderedByTypesByBaseEntity;

    }

    private FieldUnit findFieldUnit(DerivedUnit du) {

        if(du == null || du.getOriginals() == null || du.getOriginals().isEmpty()){

            return null;

        }

        @SuppressWarnings("rawtypes")

        Set<SpecimenOrObservationBase> originals = du.getOriginals();

        @SuppressWarnings("rawtypes")

        Optional<SpecimenOrObservationBase> fieldUnit = originals.stream()

                .filter(original -> original instanceof FieldUnit).findFirst();

        if (fieldUnit.isPresent()) {

            return (FieldUnit) fieldUnit.get();

        } else {

            for (@SuppressWarnings("rawtypes") SpecimenOrObservationBase sob : originals) {

                if (sob instanceof DerivedUnit) {

                    FieldUnit fu = findFieldUnit((DerivedUnit) sob);

                    if (fu != null) {

                        return fu;

                    }

                }

            }

        }

        return null;

    }

    public String print(boolean withCitation, boolean withStartingTypeLabel, boolean withNameIfAvailable) {

        return new TypeDesignationSetFormatter(withCitation, withStartingTypeLabel, withNameIfAvailable).format(this);

    }

    public String print(boolean withCitation, boolean withStartingTypeLabel, boolean withNameIfAvailable, HTMLTagRules htmlRules) {

        return new TypeDesignationSetFormatter(withCitation, withStartingTypeLabel, withNameIfAvailable).format(this, htmlRules);

    }

    class DataIntegrityException extends Exception {

        private static final long serialVersionUID = 1464726696296824905L;

        public DataIntegrityException(String string) {

            super(string);

        }

    }

}