package eu.eudat.service.supportivematerial;

import eu.eudat.authorization.AuthorizationFlags;
import eu.eudat.authorization.Permission;
import eu.eudat.commons.enums.IsActive;
import eu.eudat.commons.enums.SupportiveMaterialFieldType;
import eu.eudat.convention.ConventionService;
import eu.eudat.data.SupportiveMaterialEntity;
import eu.eudat.model.SupportiveMaterial;
import eu.eudat.model.builder.SupportiveMaterialBuilder;
import eu.eudat.model.deleter.SupportiveMaterialDeleter;
import eu.eudat.model.persist.SupportiveMaterialPersist;
import eu.eudat.query.SupportiveMaterialQuery;
import eu.eudat.service.dmpblueprint.DmpBlueprintServiceImpl;
import eu.eudat.service.storage.StorageFileService;
import gr.cite.commons.web.authz.service.AuthorizationService;
import gr.cite.tools.data.builder.BuilderFactory;
import gr.cite.tools.data.deleter.DeleterFactory;
import gr.cite.tools.data.query.QueryFactory;
import gr.cite.tools.exception.MyApplicationException;
import gr.cite.tools.exception.MyForbiddenException;
import gr.cite.tools.exception.MyNotFoundException;
import gr.cite.tools.exception.MyValidationException;
import gr.cite.tools.fieldset.BaseFieldSet;
import gr.cite.tools.fieldset.FieldSet;
import gr.cite.tools.logging.LoggerService;
import gr.cite.tools.logging.MapLogEntry;
import jakarta.persistence.EntityManager;
import jakarta.xml.bind.JAXBException;
import org.slf4j.LoggerFactory;
import org.springframework.context.MessageSource;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.stereotype.Service;

import javax.management.InvalidApplicationException;
import java.time.Instant;
import java.util.List;
import java.util.UUID;


@Service
public class SupportiveMaterialServiceImpl implements SupportiveMaterialService{

    private static final LoggerService logger = new LoggerService(LoggerFactory.getLogger(DmpBlueprintServiceImpl.class));
    private final EntityManager entityManager;
    private final AuthorizationService authorizationService;
    private final DeleterFactory deleterFactory;
    private final BuilderFactory builderFactory;
    private final ConventionService conventionService;
    private final MessageSource messageSource;
    private final QueryFactory queryFactory;
    private final SupportiveMaterialCacheService supportiveMaterialCacheService;
    private final StorageFileService storageFileService;

    public SupportiveMaterialServiceImpl(
		    EntityManager entityManager, AuthorizationService authorizationService, DeleterFactory deleterFactory, BuilderFactory builderFactory,
		    ConventionService conventionService, MessageSource messageSource, QueryFactory queryFactory,
		    SupportiveMaterialCacheService supportiveMaterialCacheService, StorageFileService storageFileService
    ) {
        this.entityManager = entityManager;
        this.authorizationService = authorizationService;
        this.deleterFactory = deleterFactory;
        this.builderFactory = builderFactory;
        this.conventionService = conventionService;
        this.messageSource = messageSource;
        this.queryFactory = queryFactory;
        this.supportiveMaterialCacheService = supportiveMaterialCacheService;
	    this.storageFileService = storageFileService;
    }

    public byte[] loadFromFile(String language, SupportiveMaterialFieldType type)  {
        SupportiveMaterialCacheService.SupportiveMaterialCacheValue supportiveMaterialCacheItem = this.supportiveMaterialCacheService.lookup(this.supportiveMaterialCacheService.buildKey(language, type));
        
        if(supportiveMaterialCacheItem == null){
            byte[] content = this.storageFileService.getSupportiveMaterial(type, language);
            if (content == null) throw new MyNotFoundException("Material not found");
            
            supportiveMaterialCacheItem = new SupportiveMaterialCacheService.SupportiveMaterialCacheValue(language, type, content);
            this.supportiveMaterialCacheService.put(supportiveMaterialCacheItem);
        }

        return supportiveMaterialCacheItem.getContent();
    }

    public SupportiveMaterial persist(SupportiveMaterialPersist model, FieldSet fields) throws MyForbiddenException, MyValidationException, MyApplicationException, MyNotFoundException, InvalidApplicationException, JAXBException{
        logger.debug(new MapLogEntry("persisting data").And("model", model).And("fields", fields));

        this.authorizationService.authorizeForce(Permission.EditSupportiveMaterial);

        Boolean isUpdate = this.conventionService.isValidGuid(model.getId());

        SupportiveMaterialEntity d;
        if (isUpdate) {
            d = this.entityManager.find(SupportiveMaterialEntity.class, model.getId());
            if (d == null)
                throw new MyNotFoundException(messageSource.getMessage("General_ItemNotFound", new Object[]{model.getId(), SupportiveMaterial.class.getSimpleName()}, LocaleContextHolder.getLocale()));
        } else {
            List<SupportiveMaterialEntity> data = this.queryFactory.query(SupportiveMaterialQuery.class).authorize(AuthorizationFlags.OwnerOrDmpAssociatedOrPermission).languageCodes(model.getLanguageCode()).types(model.getType()).collect();

            if(data != null && !data.isEmpty()){
                throw new MyApplicationException("Could not create a new Data with same type and lang code !");
            }

            d = new SupportiveMaterialEntity();
            d.setId(UUID.randomUUID());
            d.setIsActive(IsActive.Active);
            d.setCreatedAt(Instant.now());
        }

        d.setType(model.getType());
        d.setLanguageCode(model.getLanguageCode());
        d.setPayload(model.getPayload());
        d.setUpdatedAt(Instant.now());

        if (isUpdate) this.entityManager.merge(d);
        else this.entityManager.persist(d);

        this.entityManager.flush();

        return this.builderFactory.builder(SupportiveMaterialBuilder.class).authorize(AuthorizationFlags.OwnerOrDmpAssociatedOrPermission).build(BaseFieldSet.build(fields, SupportiveMaterial._id), d);
    }

    public void deleteAndSave(UUID id) throws MyForbiddenException, InvalidApplicationException {
        logger.debug("deleting : {}", id);

        this.authorizationService.authorizeForce(Permission.DeleteSupportiveMaterial);

        this.deleterFactory.deleter(SupportiveMaterialDeleter.class).deleteAndSaveByIds(List.of(id));
    }
}