package org.gcube.application.cms.concessioni.plugins;

import com.vdurmont.semver4j.Semver;
import lombok.extern.slf4j.Slf4j;
import org.bson.Document;
import org.gcube.application.cms.custom.gna.concessioni.model.ProfiledConcessione;
import org.gcube.application.cms.implementations.ImplementationProvider;
import org.gcube.application.cms.implementations.ProjectAccess;
import org.gcube.application.cms.implementations.faults.InvalidUserRoleException;
import org.gcube.application.cms.implementations.faults.ProjectNotFoundException;
import org.gcube.application.cms.implementations.faults.RegistrationException;
import org.gcube.application.cms.implementations.faults.UnauthorizedAccess;
import org.gcube.application.cms.plugins.IndexerPluginInterface;
import org.gcube.application.cms.plugins.LifecycleManager;
import org.gcube.application.cms.plugins.faults.IndexingException;
import org.gcube.application.cms.plugins.implementations.Default3PhaseManager;
import org.gcube.application.cms.plugins.reports.EventExecutionReport;
import org.gcube.application.cms.plugins.reports.Report;
import org.gcube.application.cms.plugins.reports.StepExecutionReport;
import org.gcube.application.cms.plugins.requests.BaseRequest;
import org.gcube.application.cms.plugins.requests.IndexDocumentRequest;
import org.gcube.application.cms.serialization.Serialization;
import org.gcube.application.geoportal.common.model.JSONPathWrapper;
import org.gcube.application.geoportal.common.model.document.Project;
import org.gcube.application.geoportal.common.model.document.access.Access;
import org.gcube.application.geoportal.common.model.document.access.AccessPolicy;
import org.gcube.application.geoportal.common.model.document.filesets.RegisteredFileSet;
import org.gcube.application.geoportal.common.model.document.lifecycle.LifecycleInformation;
import org.gcube.application.geoportal.common.model.document.relationships.RelationshipNavigationObject;
import org.gcube.application.geoportal.common.model.legacy.report.ConstraintCheck;
import org.gcube.application.geoportal.common.model.rest.ConfigurationException;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

@Slf4j
/** Overrides 3 Phases lifecycle with override of default values
 *
 */
public class ConcessioniLifeCycleManager extends Default3PhaseManager implements LifecycleManager {


    private static final String FOLLOWS="follows";
    private static final String PRECEDES="precedes";


    public ConcessioniLifeCycleManager() {
        DESCRIPTOR.setId("GNA-CONCESSIONI-LC");
        DESCRIPTOR.setDescription("GNA Concessioni. This plugin supports custom lifecycle management for the GNA Concessioni UseCase.");
        DESCRIPTOR.setVersion(new Semver("1.0.0"));
    }

    @Override
    public EventExecutionReport setDefault(EventExecutionReport currentReport) {
        EventExecutionReport report =  super.setDefault(currentReport);
        try{
            report.setResultingDocument(setDefaults(report.getTheRequest().getDocument()).getTheDocument());
        }catch (Throwable t){
            log.error("Unable to evaluate defaults for concessione "+currentReport.getTheRequest().getDocument().getId(),t);
            log.debug("Object was {} ",report.getTheRequest().getDocument());
            report.setStatus(Report.Status.ERROR );
            report.getMessages().add("Unable to evaluate defaults : "+t.getMessage());
        }
        return report;
    }


    // STATIC ROUTINES

    static final Project setDefaults(Project document) throws IOException {
        log.info("Concessione ID {}, setting defaults..",document.getId());
        log.debug("Full concessione is {}",document);
        ProfiledConcessione c=Serialization.convert(document,ProfiledConcessione.class);
       Document doc=c.getTheDocument();
        doc.putIfAbsent(ProfiledConcessione.SOGGETTO,new String[]{"Research Excavation","Archaeology"});

        doc.putIfAbsent(ProfiledConcessione.DESCRIZIONE_CONTENUTO,"Relazione di fine scavo e relativo abstract; selezione di immagini rappresentative;"
                + " posizionamento topografico dell'area indagata, pianta di fine scavo.");

        // Super Section
        // TODO read from UCD
        c.getInfo().getAccess().setLicense(
                ConstraintCheck.defaultFor(c.getInfo().getAccess().getLicense(), "CC0-1.0").evaluate());



        //RELAZIONE
        Document rel = doc.containsKey(ProfiledConcessione.RELAZIONE_SCAVO)?
                Serialization.convert(doc.get(ProfiledConcessione.RELAZIONE_SCAVO), Document.class):new Document();
        log.debug("Concessione {}, managing relazione {}",document.getId(),rel);
        rel.putIfAbsent(ProfiledConcessione.Sections.TITOLO,doc.getString(ProfiledConcessione.NOME)+" relazione di scavo");
        rel.putIfAbsent(ProfiledConcessione.SOGGETTO,doc.get(ProfiledConcessione.SOGGETTO));
        rel.putIfAbsent(RegisteredFileSet.CREATION_INFO,c.getInfo().getCreationInfo());
        rel.putIfAbsent(RegisteredFileSet.ACCESS,c.getInfo().getAccess());
        Access relAccess=Serialization.convert(rel.get(RegisteredFileSet.ACCESS),Access.class);
        relAccess.setLicense(ConstraintCheck.defaultFor(relAccess.getLicense(),"CC-BY-4.0").evaluate());
        relAccess.setPolicy(ConstraintCheck.defaultFor(relAccess.getPolicy(), AccessPolicy.OPEN).evaluate());
        rel.put(RegisteredFileSet.ACCESS,relAccess);
        doc.put(ProfiledConcessione.RELAZIONE_SCAVO,rel);


        //ABSTRACT Relazione
        Document abs=doc.containsKey(ProfiledConcessione.ABSTRACT_RELAZIONE)?
                Serialization.convert(doc.get(ProfiledConcessione.ABSTRACT_RELAZIONE), Document.class):new Document();
        log.debug("Concessione {}, managing abstract relazione {}",document.getId(),abs);
        abs.putIfAbsent(ProfiledConcessione.Sections.TITOLO,doc.getString(ProfiledConcessione.NOME)+" abstract relazione di scavo");
        abs.putIfAbsent(RegisteredFileSet.CREATION_INFO,c.getInfo().getCreationInfo());
        abs.putIfAbsent(RegisteredFileSet.ACCESS,c.getInfo().getAccess());
        Access absAccess=Serialization.convert(abs.get(RegisteredFileSet.ACCESS),Access.class);
        absAccess.setLicense(ConstraintCheck.defaultFor(absAccess.getLicense(),"CC-BY-4.0").evaluate());
        absAccess.setPolicy(ConstraintCheck.defaultFor(absAccess.getPolicy(), AccessPolicy.OPEN).evaluate());
        abs.put(RegisteredFileSet.ACCESS,absAccess);
        doc.put(ProfiledConcessione.ABSTRACT_RELAZIONE,abs);


        //Posizionamento scavo
        if(doc.containsKey(ProfiledConcessione.POSIZIONAMENTO_SCAVO)){
            Document pos = Serialization.convert(doc.get(ProfiledConcessione.POSIZIONAMENTO_SCAVO), Document.class);
            log.debug("Concessione {}, managing posizionamento scavo {}",document.getId(),pos);
            pos.putIfAbsent(ProfiledConcessione.Sections.TITOLO,doc.getString(ProfiledConcessione.NOME)+" posizionamento scavo");
            pos.putIfAbsent(ProfiledConcessione.Sections.ABSTRACT,"Posizionamento topografico georeferenziato dell’area interessata dalle indagini");
            pos.putIfAbsent(ProfiledConcessione.Layers.TOPIC,"Society");
            pos.putIfAbsent(ProfiledConcessione.Layers.SUB_TOPIC,"Archeology");

            pos.putIfAbsent(ProfiledConcessione.PAROLE_CHIAVE_LIBERE,doc.get(ProfiledConcessione.PAROLE_CHIAVE_LIBERE));
            pos.putIfAbsent(ProfiledConcessione.PAREOLE_CHIAVE_ICCD,doc.get(ProfiledConcessione.PAREOLE_CHIAVE_ICCD));

            // BBOX in registered filesets

            pos.put(ProfiledConcessione.RESPONSABILE,doc.get(ProfiledConcessione.RESPONSABILE));

            pos.putIfAbsent(RegisteredFileSet.CREATION_INFO,c.getInfo().getCreationInfo());
            pos.putIfAbsent(RegisteredFileSet.ACCESS,c.getInfo().getAccess());
            Access posAccess=Serialization.convert(rel.get(RegisteredFileSet.ACCESS),Access.class);
            posAccess.setLicense(ConstraintCheck.defaultFor(posAccess.getLicense(),"CC-BY-4.0").evaluate());
            posAccess.setPolicy(ConstraintCheck.defaultFor(posAccess.getPolicy(), AccessPolicy.OPEN).evaluate());
            pos.put(RegisteredFileSet.ACCESS,posAccess);
            doc.put(ProfiledConcessione.POSIZIONAMENTO_SCAVO,pos);
        }

        //IMMAGINI RAPPRESENTATIVE

        JSONPathWrapper wrapper=new JSONPathWrapper(Serialization.write(doc));
        if(doc.containsKey(ProfiledConcessione.IMMAGINI_RAPPRESENTATIVE)) {
            List imgs=wrapper.getByPath("$." + ProfiledConcessione.IMMAGINI_RAPPRESENTATIVE, List.class).get(0);
            log.debug("Concessione {}, found imgs {}",document.getId(),imgs.size());
            for (int i = 0; i <imgs.size() ; i++) {
                Document imgDoc=Serialization.asDocument(imgs.get(i));
                imgDoc.putIfAbsent(ProfiledConcessione.SOGGETTO,doc.get(ProfiledConcessione.SOGGETTO));
                imgDoc.putIfAbsent(RegisteredFileSet.CREATION_INFO,c.getInfo().getCreationInfo());
                imgDoc.putIfAbsent(RegisteredFileSet.ACCESS,c.getInfo().getAccess());
                Access imgAccess=Serialization.convert(imgDoc.get(RegisteredFileSet.ACCESS),Access.class);
                imgAccess.setLicense(ConstraintCheck.defaultFor(imgAccess.getLicense(),"CC-BY-4.0").evaluate());
                imgAccess.setPolicy(ConstraintCheck.defaultFor(imgAccess.getPolicy(), AccessPolicy.OPEN).evaluate());
                imgDoc.put(RegisteredFileSet.ACCESS,imgAccess);
                wrapper.setElement("$."+ProfiledConcessione.IMMAGINI_RAPPRESENTATIVE+"["+i+"]",imgDoc);
            }
        }

        // Layers
        if(doc.containsKey(ProfiledConcessione.PIANTE_FINE_SCAVO)) {
            List piante=wrapper.getByPath("$." + ProfiledConcessione.PIANTE_FINE_SCAVO, List.class).get(0);
            log.debug("Concessione {}, found piante {}",document.getId(),piante.size());
            for (int i = 0; i <piante.size() ; i++) {
                Document piantaDoc=Serialization.asDocument(piante.get(i));
                log.debug("Concessione {}, managing pianta {}",document.getId(),piantaDoc);
                piantaDoc.putIfAbsent(ProfiledConcessione.Sections.TITOLO,doc.getString(ProfiledConcessione.NOME)+" pianta fine scavo");
                piantaDoc.putIfAbsent(ProfiledConcessione.Sections.ABSTRACT,"Planimetria georeferenziata dell'area indagata al termine delle attività");
                piantaDoc.putIfAbsent(ProfiledConcessione.Layers.TOPIC,"Society");
                piantaDoc.putIfAbsent(ProfiledConcessione.Layers.SUB_TOPIC,"Archeology");

                piantaDoc.putIfAbsent(ProfiledConcessione.PAROLE_CHIAVE_LIBERE,doc.get(ProfiledConcessione.PAROLE_CHIAVE_LIBERE));
                piantaDoc.putIfAbsent(ProfiledConcessione.PAREOLE_CHIAVE_ICCD,doc.get(ProfiledConcessione.PAREOLE_CHIAVE_ICCD));

                // BBOX in registered filesets

                piantaDoc.put(ProfiledConcessione.RESPONSABILE,doc.get(ProfiledConcessione.RESPONSABILE));

                piantaDoc.putIfAbsent(RegisteredFileSet.CREATION_INFO,c.getInfo().getCreationInfo());
                piantaDoc.putIfAbsent(RegisteredFileSet.ACCESS,c.getInfo().getAccess());
                Access posAccess=Serialization.convert(rel.get(RegisteredFileSet.ACCESS),Access.class);
                posAccess.setLicense(ConstraintCheck.defaultFor(posAccess.getLicense(),"CC-BY-4.0").evaluate());
                posAccess.setPolicy(ConstraintCheck.defaultFor(posAccess.getPolicy(), AccessPolicy.OPEN).evaluate());
                piantaDoc.put(RegisteredFileSet.ACCESS,posAccess);
                wrapper.setElement("$."+ProfiledConcessione.PIANTE_FINE_SCAVO+"["+i+"]",piantaDoc);
            }
        }

        c.setTheDocument(Serialization.read(wrapper.getValueCTX().jsonString(),Document.class));
        return c;
    }


    @Override
    protected Document evaluateAdditionalIndexParameters(IndexDocumentRequest request) throws IndexingException {
        Document toReturn =  super.evaluateAdditionalIndexParameters(request);
        if(toReturn == null) toReturn = new Document();
        Project indexingProject = request.getDocument();

        // Evaluate to display project IDs
        log.info("Evaluating Last ID in relationship chain. Current Concessione ID is {}",indexingProject.getId());
        try {
            ArrayList<Project> projects = new ArrayList<>();
            ProjectAccess access = ImplementationProvider.get().getProvidedObjectByClass(ProjectAccess.class);
            // get Last ID in relation chain
            projects.add(indexingProject);
            if(!indexingProject.getRelationshipsByName(PRECEDES).isEmpty())
                scanRelation(projects,access.getRelations(indexingProject.getProfileID(), indexingProject.getId(), PRECEDES,true).get(0),false);
            if(!indexingProject.getRelationshipsByName(FOLLOWS).isEmpty())
                scanRelation(projects,access.getRelations(indexingProject.getProfileID(), indexingProject.getId(), FOLLOWS,true).get(0),false);

            log.debug("Produced full chain [size : {}] from {}, evaluating last available for PHASE {} ",projects.size(),indexingProject.getId(),
                    indexingProject.getLifecycleInformation().getPhase());

            List<String> toDisplayId = new ArrayList<>();
            List<String> toHideIds = new ArrayList<>();

            log.trace("Checking from LAST.. ");
            // Projects is time -ordered so we scan from last
            for(int i = projects.size()-1;i>=0;i--) {
                Project p = projects.get(i);
                log.debug("Currently checking {} : {}",p.getId(),p.getTheDocument().get("nome"));
                if(!toDisplayId.isEmpty())
                    toHideIds.add(p.getId());
                else {
                    //Still need to find candidate for displaying feature

                    //Our currently indexing project is always a good candidate
                    if(p.getId().equals(indexingProject.getId()))
                        toDisplayId.add(p.getId());
                    //We check PHASE in order to skip projects not yet in the PHASE we are indexing
                    else switch(indexingProject.getLifecycleInformation().getPhase()){
                        case Phases.PENDING_APPROVAL:{
                            if ((p.getLifecycleInformation().getPhase().equals(Phases.PENDING_APPROVAL)||
                                    p.getLifecycleInformation().getPhase().equals(Phases.PUBLISHED)))
                                toDisplayId.add(p.getId());
                            break;
                        }
                        case Phases.PUBLISHED:{
                            if (p.getLifecycleInformation().getPhase().equals(Phases.PUBLISHED))
                                toDisplayId.add(p.getId());
                            break;
                        }
                    }

                    if(!toDisplayId.isEmpty())
                        log.debug("Found last concessioni candidate for displaying. ID {}, PHASE {} ",toDisplayId,p.getLifecycleInformation().getPhase());
                    else toHideIds.add(p.getId()); // Still not found
                }
            }

            toReturn.put("_toHideIds",toHideIds);
            toReturn.put("_toDisplayIds",toDisplayId);


            log.info("Indexing request for Concessione [ID {}] with to HIDE {} and toDisplay {} ",indexingProject.getId(),toHideIds,toDisplayId);
            return toReturn;
        } catch (Exception e) {
            log.error("Unable to evaluate to Hide and Display Ids ",e);
            throw new IndexingException("Unable to evaluate chain ids to hide / display",e);
        }

    }

    private static void scanRelation(ArrayList chain,RelationshipNavigationObject obj, boolean putBefore){
        if(putBefore)chain.add(0,obj.getTarget());
        else chain.add(obj.getTarget());
        if(obj.getChildren()!=null)
            obj.getChildren().forEach(r-> scanRelation(chain,r,putBefore));
    }
}