package eu.dnetlib.dhp.schema.common;

import com.google.common.collect.Maps;
import eu.dnetlib.dhp.schema.oaf.*;
import java.util.Map;

/** Oaf model utility methods. */
public class ModelSupport {

    /** Defines the mapping between the actual entity type and the main entity type */
    private static Map<EntityType, MainEntityType> entityMapping = Maps.newHashMap();

    static {
        entityMapping.put(EntityType.publication, MainEntityType.result);
        entityMapping.put(EntityType.dataset, MainEntityType.result);
        entityMapping.put(EntityType.otherresearchproduct, MainEntityType.result);
        entityMapping.put(EntityType.software, MainEntityType.result);
        entityMapping.put(EntityType.datasource, MainEntityType.datasource);
        entityMapping.put(EntityType.organization, MainEntityType.organization);
        entityMapping.put(EntityType.project, MainEntityType.project);
    }

    /**
     * Defines the mapping between the actual entity types and the relative classes implementing
     * them
     */
    public static final Map<EntityType, Class> entityTypes = Maps.newHashMap();

    static {
        entityTypes.put(EntityType.datasource, Datasource.class);
        entityTypes.put(EntityType.organization, Organization.class);
        entityTypes.put(EntityType.project, Project.class);
        entityTypes.put(EntityType.dataset, Dataset.class);
        entityTypes.put(EntityType.otherresearchproduct, OtherResearchProduct.class);
        entityTypes.put(EntityType.software, Software.class);
        entityTypes.put(EntityType.publication, Publication.class);
    }

    public static final Map<String, Class> oafTypes = Maps.newHashMap();

    static {
        oafTypes.put("datasource", Datasource.class);
        oafTypes.put("organization", Organization.class);
        oafTypes.put("project", Project.class);
        oafTypes.put("dataset", Dataset.class);
        oafTypes.put("otherresearchproduct", OtherResearchProduct.class);
        oafTypes.put("software", Software.class);
        oafTypes.put("publication", Publication.class);
        oafTypes.put("relation", Relation.class);
    }

    private static final String schemeTemplate = "dnet:%s_%s_relations";

    private ModelSupport() {}

    /**
     * Checks subclass-superclass relationship.
     *
     * @param subClazzObject Subclass object instance
     * @param superClazzObject Superclass object instance
     * @param <X> Subclass type
     * @param <Y> Superclass type
     * @return True if X is a subclass of Y
     */
    public static <X extends Oaf, Y extends Oaf> Boolean isSubClass(
            X subClazzObject, Y superClazzObject) {
        return isSubClass(subClazzObject.getClass(), superClazzObject.getClass());
    }

    /**
     * Checks subclass-superclass relationship.
     *
     * @param subClazzObject Subclass object instance
     * @param superClazz Superclass class
     * @param <X> Subclass type
     * @param <Y> Superclass type
     * @return True if X is a subclass of Y
     */
    public static <X extends Oaf, Y extends Oaf> Boolean isSubClass(
            X subClazzObject, Class<Y> superClazz) {
        return isSubClass(subClazzObject.getClass(), superClazz);
    }

    /**
     * Checks subclass-superclass relationship.
     *
     * @param subClazz Subclass class
     * @param superClazz Superclass class
     * @param <X> Subclass type
     * @param <Y> Superclass type
     * @return True if X is a subclass of Y
     */
    public static <X extends Oaf, Y extends Oaf> Boolean isSubClass(
            Class<X> subClazz, Class<Y> superClazz) {
        return superClazz.isAssignableFrom(subClazz);
    }

    /**
     * Lists all the OAF model classes
     *
     * @param <T>
     * @return
     */
    public static <T extends Oaf> Class<T>[] getOafModelClasses() {
        return new Class[] {
            Author.class,
            Context.class,
            Country.class,
            DataInfo.class,
            Dataset.class,
            Datasource.class,
            ExternalReference.class,
            ExtraInfo.class,
            Field.class,
            GeoLocation.class,
            Instance.class,
            Journal.class,
            KeyValue.class,
            Oaf.class,
            OafEntity.class,
            OAIProvenance.class,
            Organization.class,
            OriginDescription.class,
            OtherResearchProduct.class,
            Project.class,
            Publication.class,
            Qualifier.class,
            Relation.class,
            Result.class,
            Software.class,
            StructuredProperty.class
        };
    }

    public static String getMainType(final EntityType type) {
        return entityMapping.get(type).name();
    }

    public static boolean isResult(EntityType type) {
        return MainEntityType.result.name().equals(getMainType(type));
    }

    public static String getScheme(final String sourceType, final String targetType) {
        return String.format(
                schemeTemplate,
                entityMapping.get(EntityType.valueOf(sourceType)).name(),
                entityMapping.get(EntityType.valueOf(targetType)).name());
    }
}