package eu.dnetlib.parthenos.rdf;

import java.util.Iterator;
import java.util.List;
import java.util.Set;

import com.google.common.collect.Iterators;
import com.google.common.collect.Lists;
import eu.dnetlib.parthenos.CRM;
import eu.dnetlib.parthenos.CRMpe;
import eu.dnetlib.parthenos.catalogue.CatalogueLicense;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.jena.assembler.AssemblerHelp;
import org.apache.jena.rdf.model.*;
import org.apache.jena.vocabulary.RDF;
import org.apache.jena.vocabulary.RDFS;
import org.springframework.stereotype.Component;

/**
 * Created by Alessia Bardi on 11/12/2017.
 *
 * @author Alessia Bardi
 */
@Component
public class ResourceReader {

	private static final Log log = LogFactory.getLog(ResourceReader.class);
	//sparql template for services include <availability> field that is not explicit in the model
	private Property availibilityProperty = ResourceFactory.createProperty("","availability");
	//sparql template for services include <activitytype> field that is not explicit in the model
	private Property activitytypeProperty = ResourceFactory.createProperty("","activitytype");
	//sparql template for datasets include <encoding> field that is generated from the creation event
	private Property encodingProperty = ResourceFactory.createProperty("","encoding");
	//sparql template for datasets include <used_software> field that is generated from the creation event
	private Property usedSoftwareProperty = ResourceFactory.createProperty("","used_software");
	//sparql template for software include <usedby> field that is generated from the creation event of the resource using the software
	private Property usedByProperty = ResourceFactory.createProperty("","usedby");
	//sparql template for datasets include <creator> field that is generated from the creation event
	private Property creatorProperty = ResourceFactory.createProperty("","creator");
	//sparql template for software include <creationtime> field that is generated from the creation event
	private Property creationtimeProperty = ResourceFactory.createProperty("","creationtime");


	public String getTitle(final Resource resource) {
		final Statement s = resource.getProperty(CRM.P102_has_title);
		if (s != null) {
			RDFNode obj = s.getObject();
			if(obj.isLiteral()) return obj.asLiteral().getLexicalForm();
		}
		//if we do not find the crm:P102_has_title, let's get the label
		return getLabel(resource);
	}

	public String getLabel(final Resource resource) {
		if(resource == null) return "";
		if (resource.hasProperty(RDFS.label)) {
			return resource.getProperty(RDFS.label).getString().replace("'", "\'");
		} else return "";
	}

	public Iterator<String> getDescriptions(final Resource resource) {
		StmtIterator it = resource.listProperties(CRM.P3_has_note);
		return Iterators.transform(it, f -> f.getString().replace("'", "\'"));
	}


	//NOTE: based on the sparql templates competency is a string, in the model it is a PE36_Competency_Type
	public Iterator<String> getCompetences(final Resource resource) {
		StmtIterator it = resource.listProperties(CRMpe.PP45_has_competency);
		return Iterators.transform(it, f -> f.getString());
	}

	public String getAvailability(final Resource resource) {
		String availability = "";
		if (resource.hasProperty(availibilityProperty)){
			availability = resource.getProperty(availibilityProperty).getString();
		}
		return availability;
	}

	public String getConditionOfUse(final Resource resource) {
		StmtIterator it = resource.listProperties(CRM.P16_used_specific_object);
		while(it.hasNext()){
			Resource obj = it.next().getResource();
			if(obj.hasProperty(RDF.type, CRM.E30_Right) && obj.hasProperty(CRM.P3_has_note)){
				String rightsString = obj.getProperty(CRM.P3_has_note).getString();
				if(obj.hasProperty(CRM.P2_has_type)){
					Resource rightType = obj.getPropertyResourceValue(CRM.P2_has_type);
					rightsString += " ["+getLabel(rightType)+"]";
				}
				return rightsString;
			}
		}
		return "";
	}

	public CatalogueLicense getCatalogueLicense(final Resource resource){
		if(resource.hasProperty(CRM.P16_used_specific_object)) {
			Resource obj = resource.getPropertyResourceValue(CRM.P16_used_specific_object);
			if (obj.hasProperty(CRM.P2_has_type)) {
				String license = getLabel(obj.getPropertyResourceValue(CRM.P2_has_type));
				return CatalogueLicense.getCatalogueLicenseFor(license);
			}
		}
		return CatalogueLicense.NotSpecified;
	}

	public Iterator<String> getRDFClassNames(final Resource resource){
		StmtIterator it = resource.listProperties(RDF.type);
		return Iterators.transform(it, f -> f.getResource().getLocalName());
	}

	public Iterator<String> getActivityTypes(final Resource resource){
		StmtIterator it = resource.listProperties(activitytypeProperty);
		return Iterators.transform(it, f -> f.getString());
	}

	public Iterator<String> getProviderNames(final Resource resource){
		StmtIterator sit = resource.listProperties(CRMpe.PP2_provided_by);
		StmtIterator sit2 = resource.listProperties(CRMpe.PP25_has_maintaining_RI);
		return Iterators.transform(Iterators.concat(sit, sit2), f -> {
			Resource provider = f.getResource();
			return getTitle(provider);
		});
	}

	public Iterator<String> getProviderUris(final Resource resource){
		StmtIterator sit = resource.listProperties(CRMpe.PP2_provided_by);
		StmtIterator sit2 = resource.listProperties(CRMpe.PP25_has_maintaining_RI);
		return Iterators.transform(Iterators.concat(sit, sit2), f -> {
			return f.getResource().getURI();
		});
	}

	public Iterator<String> getProviderContactPoints(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP2_provided_by);
		return Iterators.transform(it, f -> {
			Resource provider = f.getResource();
			if (provider.hasProperty(CRM.P76_has_contact_point)) {
				Resource contactPoint = provider.getPropertyResourceValue(CRM.P76_has_contact_point);
				return getLabel(contactPoint);
			}
			else return "";
		});
	}

	public Iterator<String> getResourceDirectContactPointsURI(final Resource resource){
		StmtIterator it = resource.listProperties(CRM.P76_has_contact_point);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}



	public Iterator<String> getHostedStuff(final Resource resource){
		//In inference we trust
		StmtIterator sit4 = resource.listProperties(CRMpe.PP4_hosts_object);
		return Iterators.transform(sit4, f -> f.getResource().getURI());
//		StmtIterator sit6 = resource.listProperties(CRMpe.PP6_hosts_digital_object);
//		StmtIterator sit7 = resource.listProperties(CRMpe.PP7_hosts_software_object);
//		StmtIterator sit8 = resource.listProperties(CRMpe.PP8_hosts_dataset);
//		Iterator<String>  it4 = Iterators.transform(sit4, f -> f.getResource().getURI());
//		Iterator<String>  it6 = Iterators.transform(sit6, f -> f.getResource().getURI());
//		Iterator<String>  it7 = Iterators.transform(sit7, f -> f.getResource().getURI());
//		Iterator<String>  it8 = Iterators.transform(sit8, f -> f.getResource().getURI());
//		return Iterators.concat(it4,it6, it7, it8);
	}

	public Iterator<String> getHostedBys(final Resource resource){
		//In inference we trust
		StmtIterator sit4 = resource.listProperties(CRMpe.PP4i_is_object_hosted_by);
		return Iterators.transform(sit4, f -> f.getResource().getURI());
//		StmtIterator sit6 = resource.listProperties(CRMpe.PP6i_is_digital_object_hosted_by);
//		StmtIterator sit7 = resource.listProperties(CRMpe.PP7i_is_software_object_hosted_by);
//		StmtIterator sit8 = resource.listProperties(CRMpe.PP8i_is_dataset_hosted_by);
//		Iterator<String>  it4 = Iterators.transform(sit4, f -> f.getResource().getURI());
//		Iterator<String>  it6 = Iterators.transform(sit6, f -> f.getResource().getURI());
//		Iterator<String>  it7 = Iterators.transform(sit7, f -> f.getResource().getURI());
//		Iterator<String>  it8 = Iterators.transform(sit8, f -> f.getResource().getURI());
//		return Iterators.concat(it4, it6, it7, it8);
	}


	public Iterator<String> getCuratedObjects(final Resource resource){
		//In inference we trust
		StmtIterator sit32 = resource.listProperties(CRMpe.PP32_curates);
		return Iterators.transform(sit32, f -> f.getResource().getURI());
//		StmtIterator sit11 = resource.listProperties(CRMpe.PP11_curates_volatile_digital_object);
//		StmtIterator sit12 = resource.listProperties(CRMpe.PP12_curates_volatile_software);
//		StmtIterator sit13 = resource.listProperties(CRMpe.PP13_curates_volatile_dataset);
//		Iterator<String>  it32 = Iterators.transform(sit32, f -> f.getResource().getURI());
//		Iterator<String>  it11 = Iterators.transform(sit11, f -> f.getResource().getURI());
//		Iterator<String>  it12 = Iterators.transform(sit12, f -> f.getResource().getURI());
//		Iterator<String>  it13 = Iterators.transform(sit13, f -> f.getResource().getURI());
//		return Iterators.concat(it32, it11, it12, it13);
	}

	public Iterator<String> getCuratorUrls(final Resource resource){
		//In inference we trust
		StmtIterator sit32 = resource.listProperties(CRMpe.PP32i_is_curated_by);
		return Iterators.transform(sit32, f -> f.getResource().getURI());
//		StmtIterator sit11 = resource.listProperties(CRMpe.PP11i_is_volatile_digital_object_curated_by);
//		StmtIterator sit12 = resource.listProperties(CRMpe.PP12i_is_volatile_software_curated_by);
//		StmtIterator sit13 = resource.listProperties(CRMpe.PP13i_is_volatile_dataset_curated_by);
//		Iterator<String>  it32 = Iterators.transform(sit32, f -> f.getResource().getURI());
//		Iterator<String>  it11 = Iterators.transform(sit11, f -> f.getResource().getURI());
//		Iterator<String>  it12 = Iterators.transform(sit12, f -> f.getResource().getURI());
//		Iterator<String>  it13 = Iterators.transform(sit13, f -> f.getResource().getURI());
//		return Iterators.concat(it32, it11, it12, it13);
	}

	public Iterator<String> getResourceCuratorCurationPlans(final Resource resource) {
		//In inference we trust
		StmtIterator sit32 = resource.listProperties(CRMpe.PP32i_is_curated_by);
		return Iterators.concat(Iterators.transform(sit32, c -> getCurationPlans(c.getResource())));
	}

	public Iterator<String> getDeliversOnRequest(final Resource resource){
		StmtIterator sit = resource.listProperties(CRMpe.PP15_delivers_on_request);
		return Iterators.transform(sit, f -> f.getResource().getURI());
	}

	public Iterator<String> getRunsOnRequest(final Resource resource){
		StmtIterator sit = resource.listProperties(CRMpe.PP14_runs_on_request);
		return Iterators.transform(sit, f -> f.getResource().getURI());
	}

	public Iterator<String> getAccessPoints(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP28_has_designated_access_point);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getDeclarativeTimes(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP42_has_declarative_time);
		return Iterators.transform(it, f -> f.getString());
	}

	public Iterator<String> getProtocols(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP29_uses_access_protocol);
		return Iterators.transform(it, f -> getLabel(f.getResource()));
	}

	public Iterator<String> getCurationPlans(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP31_uses_curation_plan);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getMemberUrls(final Resource resource){
		StmtIterator it = resource.listProperties(CRM.P107_has_current_or_former_member);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> isMemberOf(final Resource resource){
		StmtIterator it = resource.listProperties(CRM.P107i_is_current_or_former_member_of);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getProvidedServiceUrls(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP2i_provides);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getHasTypeLabels(final Resource resource){
		StmtIterator it = resource.listProperties(CRM.P2_has_type);
		return Iterators.transform(it, f -> {if(f.getObject().isLiteral()) return f.getObject().asLiteral().getString(); else return getLabel(f.getResource());});
	}

	public Iterator<String> getIsPartOfUrls(final Resource resource){
		//in inference we trust
		//StmtIterator it = resource.listProperties(CRMpe.PP23i_is_dataset_part_of);
		StmtIterator it = resource.listProperties(CRM.P106i_forms_part_of);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getHasPartUrls(final Resource resource){
		//in inference we trust
		//StmtIterator it = resource.listProperties(CRMpe.PP23_has_dataset_part);
		StmtIterator it = resource.listProperties(CRM.P106_is_composed_of);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getSubjects(final Resource resource){
		StmtIterator it = resource.listProperties(CRM.P129_is_about);
		return Iterators.transform( Iterators.filter(it, f -> !f.getResource().hasProperty(RDF.type, CRM.E4_Period) && !f.getResource().hasProperty(RDF.type, CRM.E52_Time_Span) && !f.getResource().hasProperty(RDF.type, CRM.E53_Place)), f -> getLabel(f.getResource()));
	}

	public List<String> getTemporalCoverages(final Resource resource){
		List<String> temporalCoverages = getCoverages(resource, CRM.E4_Period);
		temporalCoverages.addAll(getCoverageTimeSpan(resource));
		return temporalCoverages;
	}

	public List<String> getSpatialCoverages(final Resource resource){
		return getCoverages(resource, CRM.E53_Place);
	}

	private List<String> getCoverages(final Resource resource, final Resource coverageType){
		List<String> cov = Lists.newArrayList();
		StmtIterator it = resource.listProperties(CRM.P129_is_about);
		while(it.hasNext()){
			Resource r = it.next().getResource();
			if(r.hasProperty(RDF.type, coverageType)){
				cov.add(getLabel(r));
			}
		}
		return cov;
	}

	private List<String> getCoverageTimeSpan(final Resource resource){
		List<String> cov = Lists.newArrayList();
		StmtIterator it = resource.listProperties(CRM.P129_is_about);
		while(it.hasNext()){
			Resource r = it.next().getResource();
			if(r.hasProperty(RDF.type, CRM.E52_Time_Span)){
				StmtIterator times = r.listProperties(CRM.P82_at_some_time_within);
				while(times.hasNext()){
					Resource t = times.next().getResource();
					cov.add(t.toString());
				}
			}
		}
		return cov;
	}

	public Iterator<String> getEncodings(final Resource resource){
		StmtIterator it = resource.listProperties(encodingProperty);
		return Iterators.transform(it, f -> f.getString());
	}

	public Iterator<String> getCreatorsURIs(final Resource resource){
		StmtIterator it = resource.listProperties(creatorProperty);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getMetadata(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP39i_has_metadata);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}
	public Iterator<String> getDescribedDataset(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP39_is_metadata_for);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getOfferedServiceUrls(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP1_currently_offers);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public String getStartTime(final Resource resource){
		Resource timespan = resource.getPropertyResourceValue(CRM.P4_has_time_span);
		if(timespan != null){
			if(timespan.hasProperty(CRM.P82a_begin_of_the_begin))
				return timespan.getProperty(CRM.P82a_begin_of_the_begin).getString();
		}
		return "";
	}

	public String getFirstCreationTime(final Resource resource){
		StmtIterator it = resource.listProperties(creationtimeProperty);
		if(it.hasNext()){
			return it.next().getString();
		}
		return "";
	}

	public Iterator<String> getMaintainerUrls(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP44_has_maintaining_team);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public List<String> getMaintainerContacts(final Resource resource){
		List<String> res = Lists.newArrayList();
		StmtIterator it = resource.listProperties(CRMpe.PP44_has_maintaining_team);
		while(it.hasNext()){
			Resource maintainer = it.next().getResource();
			Iterator<String> itM = getResourceDirectContactPointsURI(maintainer);
			while(itM.hasNext()){
				res.add(itM.next());
			}
		}
		return res;
	}

	public Iterator<String> getMaintainersLabels(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP44_has_maintaining_team);
		return Iterators.transform(it, f -> getLabel(f.getResource()));
	}

	public Iterator<String> getMaintainedUrls(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP44i_is_maintaining_team_of);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getSnapshots(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP17_has_snapshot);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getIsSnapshotOfs(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP17i_is_snapshot_of);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getHasReleases(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP22_has_release);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getIsReleaseOfs(final Resource resource){
		StmtIterator it = resource.listProperties(CRMpe.PP22i_is_release_of);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getUsedSoftware(final Resource resource){
		StmtIterator it = resource.listProperties(usedSoftwareProperty);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	public Iterator<String> getUsedBy(final Resource resource){
		StmtIterator it = resource.listProperties(usedByProperty);
		return Iterators.transform(it, f -> f.getResource().getURI());
	}

	//NOTE: languages are resources in CRM but our sparql template make them strings by taking the label.
	public Iterator<String> getLanguages(final Resource resource){
		StmtIterator it = resource.listProperties(CRM.P72_has_language);
		return Iterators.transform(it, f -> f.getString());
	}

	/**
	 * Finds the most specific type of res.
	 *
	 * @param res          Resource you want to find the most specific type
	 * @param fallbackType Resource representing the type to return if there is no type or if we get AmbiguousSpecificTypeException
	 * @return Resource: the most specific type, if any. fallbackType otherwise
	 */
	public Resource findSpecificType(final Resource res, final Resource fallbackType) {
		Resource type = fallbackType;
		Set<Resource> types = AssemblerHelp.findSpecificTypes(res, fallbackType);
		if (types == null || types.isEmpty()) {
			log.warn("No specific type found. Returning the fallback type: " + fallbackType);
		}
		if (types.size() == 1) {
			type = types.iterator().next();
		}
		if (types.size() > 1) {
			log.warn("Found more than one possible specific type");
			types.stream().forEach((t) -> log.warn(t));
			if(types.contains(CRM.E29_Design_or_Procedure)){
				log.warn("CRM.E29_Design_or_Procedure always wins");
				type = CRM.E29_Design_or_Procedure;
			}
			else {
				log.warn("Choosing the first");
				type = types.iterator().next();
			}
		}
		return type;
	}
}