gcube-cms-suite/geoportal-service/src/main/java/org/gcube/application/geoportal/service/engine/mongo/ProfiledMongoManager.java

package org.gcube.application.geoportal.service.engine.mongo;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.mongodb.client.MongoDatabase;
import com.vdurmont.semver4j.Semver;
import lombok.Getter;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.io.IOUtils;
import org.bson.Document;
import org.bson.types.ObjectId;
import org.gcube.application.cms.plugins.LifecycleManager;
import org.gcube.application.cms.plugins.faults.StepException;
import org.gcube.application.cms.plugins.model.PluginDescriptor;
import org.gcube.application.cms.plugins.reports.ExecutionReport;
import org.gcube.application.cms.plugins.requests.StepExecutionRequest;
import org.gcube.application.geoportal.common.faults.StorageException;
import org.gcube.application.geoportal.common.model.document.*;
import org.gcube.application.geoportal.common.model.legacy.Concessione;
import org.gcube.application.geoportal.common.model.legacy.WorkspaceContent;
import org.gcube.application.geoportal.common.model.profile.Field;
import org.gcube.application.geoportal.common.model.profile.HandlerDeclaration;
import org.gcube.application.geoportal.common.model.profile.Profile;
import org.gcube.application.geoportal.common.model.rest.QueryRequest;
import org.gcube.application.geoportal.common.rest.TempFile;
import org.gcube.application.geoportal.common.utils.JSONPathWrapper;
import org.gcube.application.geoportal.common.utils.StorageUtils;
import org.gcube.application.geoportal.service.engine.ImplementationProvider;
import org.gcube.application.geoportal.service.engine.WorkspaceManager;
import org.gcube.application.geoportal.service.model.internal.faults.ConfigurationException;
import org.gcube.application.geoportal.service.model.internal.faults.DeletionException;
import org.gcube.application.cms.Serialization;
import org.gcube.application.geoportal.service.utils.UserUtils;
import org.gcube.common.storagehub.client.dsl.FolderContainer;
import org.gcube.common.storagehub.model.exceptions.StorageHubException;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Response;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.security.InvalidParameterException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.function.Consumer;

import static org.gcube.application.cms.Serialization.*;

@Slf4j
public class ProfiledMongoManager extends MongoManager implements MongoManagerI<ProfiledDocument>{

    @Getter
    Profile profile;
    MongoDatabase db=null;




    public ProfiledMongoManager(String profileId) throws ConfigurationException {
        // Check Profile ID
        log.info("Loading profile ID {} ",profileId);
        if(profileId==null) throw new InvalidParameterException("Profile ID cannot be null");
        Map<String,Profile> profiles=ImplementationProvider.get().getProfiles().getObject();
        if(!profiles.containsKey(profileId)) {
            log.debug("Asked profile {} not found. Available ones are {} ",profileId,profiles.keySet());
            throw new WebApplicationException("Profile " + profileId + " not registered", Response.Status.NOT_FOUND);
        }
        profile=profiles.get(profileId);
        log.debug("Loaded Profile {} ",profile);


        // Connect to DB
        String toUseDB=super.client.getConnection().getDatabase();
        log.info("Connecting to DB {} ",toUseDB);

        // TODO MAP OF DATABASES?
        db=client.getTheClient().getDatabase(toUseDB);
    }

    @Getter(lazy = true)
    private final LifecycleManager manager=getLCManager();

    private LifecycleManager getLCManager() {
        try{
            LifecycleManager toReturn=null;
            //Getting Lifecycle Manager declaration from Profile
            List<HandlerDeclaration> handlerDeclarations= profile.getHandlersMap().get(PluginDescriptor.BaseTypes.LIFECYCLE_MANAGER);
            if(handlerDeclarations==null || handlerDeclarations.isEmpty()) throw new ConfigurationException("No Lifecycle Handler defined for profile ID "+profile.getId());
            if(handlerDeclarations.size()>1) throw new ConfigurationException("Too many Lifecycle Handlers defined ("+handlerDeclarations+") in profile ID "+profile.getId());

            HandlerDeclaration lcHandlerDeclaration=handlerDeclarations.get(0);

            // Loading Lifecycle Manager
            log.debug("Looking for handler {} ",lcHandlerDeclaration);
            toReturn=(LifecycleManager) ImplementationProvider.get().getPluginManager().getObject().get(lcHandlerDeclaration.getId());
            if(toReturn==null) throw new ConfigurationException("Unable to find Lifecycle Manager Plugin. ID "+lcHandlerDeclaration.getId());

            return toReturn;
        } catch(Throwable t){
            log.warn("Unable to load LC Manager ",t);
            return null;
        }
    }

    private String getCollectionName(){
        // TODO Profile can directly specify, use ID only as default

        return profile.getId();
    }

    @Override
    public MongoDatabase getDatabase(){
        return db;
    }

    @Override
    public ProfiledDocument registerNew(Document toRegisterDoc) throws IOException, StepException {
        log.info("Registering new document in {} ",profile.getId());
        log.debug("Going to register {}",toRegisterDoc.toJson());

        ProfiledDocument toRegister = new ProfiledDocument();
        toRegister.setTheDocument(toRegisterDoc);


        PublicationInfo pubInfo=new PublicationInfo();
        pubInfo.setCreationInfo(UserUtils.getCurrent().asInfo());

        // TODO Set Access From Profile
        Access access=new Access();
        access.setLicense("");
        access.setPolicy(AccessPolicy.OPEN);
        pubInfo.setAccess(access);

        toRegister.setInfo(pubInfo);

        toRegister.setProfileID(profile.getId());
        toRegister.setProfileVersion(profile.getVersion());
        toRegister.setVersion(new Semver("1.0.0"));

        // Apply Lifecycle

        toRegister=step(toRegister,StepExecutionRequest.Steps.ON_INIT_DOCUMENT,null).getResult();

        log.debug("Going to register {} ",toRegister);

        // Insert object
        ObjectId id =insert(asDocument(toRegister),getCollectionName());

        log.info("Obtained id {} ",id);
        return getByID(id.toHexString());
    }

    @Override
    public ProfiledDocument update(String id, Document toSet) throws IOException, StepException {
        log.trace("Replacing {} ",toSet);
        ProfiledDocument toUpdate=getByID(id);
        toUpdate.setTheDocument(toSet);

        toUpdate=onUpdate(toUpdate);
        return convert(replace(asDocument(toUpdate),getCollectionName()),ProfiledDocument.class);
    }


    private ProfiledDocument onUpdate(ProfiledDocument toUpdate) throws StepException {
        UserUtils.AuthenticatedUser u = UserUtils.getCurrent();
        toUpdate.getInfo().setLastEditInfo(u.asInfo());
        toUpdate.setVersion(toUpdate.getVersion().withIncPatch());

        return step(toUpdate,StepExecutionRequest.Steps.ON_UPDATE_DOCUMENT,null).getResult();
    }

    @Override
    public void delete(String id,boolean force) throws DeletionException {
        log.debug("Deleting by ID {}, force {}",id,force);
        try{
            ProfiledDocument doc =getByID(id);

            // TODO INVOKE LIFECYCLE

            //if(!force&&isPublished(id)) throw new Exception("Cannot delete published documents. Unpublish it or use force = true");

            try{
                // TODO CHECK PHASE AND STATUS
                // DEINDEX
                // DEMATERIALIZE
                // DELETE CONTENT
                // DELETE ENTRY
                throw  new DeletionException("IMPLEMENT THIS");
                // delete(asId(id), getCollectionName());
            }catch(DeletionException e) {
                //storing updated - partially deleted
               // concessione=onUpdate(concessione);
               // replace(asDocument(concessione), collectionName);
                throw e;
            }
        }catch(Throwable t){
            throw new DeletionException("Unable to delete "+id,t);
        }
    }

    @Override
    public ProfiledDocument getByID(String id){
        Document doc=super.getById(asId(id),getCollectionName());
        if(doc==null) throw new WebApplicationException("No document with ID "+id);
        return convert(doc,ProfiledDocument.class);
    }

    @Override
    public Iterable<Document> query(QueryRequest queryRequest) {
        log.info("Querying {} ",queryRequest);
        LinkedBlockingQueue queue=new LinkedBlockingQueue<Concessione>();
        query(queryRequest,getCollectionName()).forEach(
                (Consumer<? super Document>) (Document d)->{try{
                    queue.put(d);
                }catch(Throwable t){log.warn("Unable to translate "+d);}});
        log.info("Returned {} elements ",queue.size());
        return queue;
    }

    @Override
    public Iterable<ProfiledDocument> filter(QueryRequest queryRequest) {
        log.info("Searching concessione for filter {} ",queryRequest);
        LinkedBlockingQueue queue=new LinkedBlockingQueue<Concessione>();
        query(queryRequest,getCollectionName()).forEach(
                (Consumer<? super Document>) (Document d)->{try{
                    queue.put(d);
                }catch(Throwable t){log.warn("Unable to translate "+d);}});
        log.info("Returned {} elements ",queue.size());
        return queue;
    }


    @Override
    public ProfiledDocument performStep(String id, String step, Document options) throws StepException, JsonProcessingException {
        ExecutionReport report = step(getByID(id), step, options);
        return convert(replace(asDocument(report.getResult()),getCollectionName()),ProfiledDocument.class);
    }



    /**
     * NB Put at path :
     *
     *
     *
     */
    @Override
    public ProfiledDocument registerFileSet(String id, String destination, Document attributes, List<TempFile> files) throws ConfigurationException, StorageHubException, StorageException, StepException, JsonProcessingException {
        log.info("Registering fileset [size : {}] for {} at {} with options {}",files.size(),id,destination,attributes);

        ProfiledDocument doc=getByID(id);
        WorkspaceManager ws=new WorkspaceManager();
        StorageUtils storage=ImplementationProvider.get().getStorageProvider().getObject();


        log.debug("Checking {}  path against profile {}",destination,profile.getId());
        JSONPathWrapper schemaWrapper= new JSONPathWrapper(profile.getSchema().toJson());
        List<Object> fieldDefinitions=schemaWrapper.getByPath(destination);
        if(fieldDefinitions==null || fieldDefinitions.isEmpty()) throw new WebApplicationException("No Field found in schema "+profile.getId()+" at "+destination, Response.Status.BAD_REQUEST);
        if(fieldDefinitions.size()>1) throw new WebApplicationException("Multiple field definitions ("+fieldDefinitions.size()+") found in "+profile.getId()+" for "+destination,Response.Status.BAD_REQUEST);

        Field fieldDefinition=Serialization.convert(fieldDefinitions.get(0),Field.class);

        log.debug("Field definition is {}",fieldDefinition);
        JSONPathWrapper docWrapper=new JSONPathWrapper(doc.getTheDocument().toJson());
        List<RegisteredFileSet> found=docWrapper.getByPath(destination,RegisteredFileSet.class);
        if(fieldDefinition.getMaxCardinality()==1 && (!found.isEmpty())){
            throw new WebApplicationException("Cannot add registered fileset at "+destination+" : field is not collection.",Response.Status.BAD_REQUEST);
        }


        RegisteredFileSet registeredFileSet=prepareRegisteredFileSet(doc,profile,destination,attributes,files,storage,ws);

        log.debug("Registered fileset is {} ",registeredFileSet);


        if(fieldDefinition.getMaxCardinality()>1){
            // Field is collection
            found.add(registeredFileSet);
            docWrapper.set(destination,found);
        }
        else {
            docWrapper.set(destination,registeredFileSet);
        }

        log.debug("Setting result on profiled document");
        doc.setTheDocument(Document.parse(docWrapper.getCtx().jsonString()));

        doc=onUpdate(doc);

        return convert(replace(asDocument(doc),getCollectionName()),ProfiledDocument.class);
    }

    @Override
    public ProfiledDocument deleteFileSet(String id, String destination, Boolean force) throws ConfigurationException, StorageHubException, StorageException, StepException, JsonProcessingException {
        throw new RuntimeException("Implement this");
    }


//    @Override
//    public ProfiledDocument deleteRegisteredFileSet(String id, String destination, List<TempFile> files) {
//        throw new RuntimeException("TO IMPLEMENT");
//    }

    private ExecutionReport step(ProfiledDocument theDocument,String step,Document callParameters) throws StepException {
        log.info("[Profile {} ] Invoking Step {} on {}" ,profile.getId(),step,getManager().getDescriptor());
        StepExecutionRequest request=new StepExecutionRequest();
        request.setCallParameters(callParameters);
        request.setDocument(theDocument);
        request.setProfile(profile);
        request.setStep(step);
        log.debug("Requesting Step Execution {} ",request);
        ExecutionReport report= getManager().performStep(request);
        log.debug("Report is {}",report);
        if(report.getResult()==null) throw new StepException("Report result is null");
        return report;
    }




    private static final RegisteredFileSet prepareRegisteredFileSet(ProfiledDocument doc, Profile profile,String destination,
                                                                    Document attributes,List<TempFile> files, StorageUtils storage,WorkspaceManager ws) throws StorageHubException, StorageException {
        log.debug("Preparing Registered FileSet..");
        attributes.putIfAbsent(RegisteredFileSet.CREATION_INFO,UserUtils.getCurrent().asInfo());
        attributes.putIfAbsent(RegisteredFileSet.ACCESS,doc.getInfo().getAccess());
        FolderContainer base=ws.createFolder(new WorkspaceManager.FolderOptions(
                doc.get_id(),"Base Folder for profiled document. Profile "+profile.getId(),null));

        FolderContainer sectionFolder=ws.createFolder(new WorkspaceManager.FolderOptions(
                doc.get_id()+destination,"Registered Fileset at path "+destination,base));

        attributes.putIfAbsent(RegisteredFileSet.FOLDER_ID,sectionFolder.getId());

        ArrayList<RegisteredFile> registeredFiles=new ArrayList<>();

        for (TempFile f : files) {
            InputStream is=null;
            try{
                log.debug("Opening temp file {}",f);
                String fileUrl=storage.getURL(f.getId());
                log.debug("Got URL {} from ID {}",fileUrl,f.getId());
                is=new URL(fileUrl).openStream();
                RegisteredFile registered=ws.registerFile(new WorkspaceManager.FileOptions(f.getFilename(),is,
                        "Imported via gcube CMS service ", sectionFolder));
                log.debug("Registered "+registered);
                registeredFiles.add(registered);
            }catch(StorageHubException | IOException e){
                throw new StorageException("Unable to store "+f,e);
            }finally{
                if(is!=null)
                    IOUtils.closeQuietly(is);
            }
        }
        attributes.putIfAbsent(RegisteredFileSet.PAYLOADS,registeredFiles);
        return Serialization.convert(attributes,RegisteredFileSet.class);
    }
}