package eu.eudat.service.tenant;

import eu.eudat.authorization.AuthorizationFlags;
import eu.eudat.authorization.Permission;
import eu.eudat.commons.XmlHandlingService;
import eu.eudat.commons.enums.IsActive;
import eu.eudat.commons.types.tenant.*;
import eu.eudat.convention.ConventionService;
import eu.eudat.data.TenantEntity;
import eu.eudat.errorcode.ErrorThesaurusProperties;
import eu.eudat.model.Tenant;
import eu.eudat.model.builder.TenantBuilder;
import eu.eudat.model.deleter.TenantDeleter;
import eu.eudat.model.persist.TenantPersist;
import eu.eudat.model.persist.tenantconfig.*;
import eu.eudat.model.tenantconfig.TenantSource;
import eu.eudat.service.encryption.EncryptionService;
import eu.eudat.service.responseutils.ResponseUtilsService;
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 org.jetbrains.annotations.NotNull;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.MessageSource;
import org.springframework.context.i18n.LocaleContextHolder;
import org.springframework.stereotype.Service;

import javax.crypto.*;
import javax.management.InvalidApplicationException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.time.Instant;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
import java.util.stream.Collectors;

@Service
public class TenantServiceImpl implements TenantService {

    private static final LoggerService logger = new LoggerService(LoggerFactory.getLogger(TenantServiceImpl.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 ResponseUtilsService responseUtilsService;
    private final XmlHandlingService xmlHandlingService;
    private final ErrorThesaurusProperties errors;
    private final EncryptionService encryptionService;

    private final TenantProperties properties;

    @Autowired
    public TenantServiceImpl(
            EntityManager entityManager,
            AuthorizationService authorizationService,
            DeleterFactory deleterFactory,
            BuilderFactory builderFactory,
            ConventionService conventionService,
            MessageSource messageSource, QueryFactory queryFactory,
            ResponseUtilsService responseUtilsService,
            XmlHandlingService xmlHandlingService,
            ErrorThesaurusProperties errors,
            EncryptionService encryptionService, TenantProperties properties) {
        this.entityManager = entityManager;
        this.authorizationService = authorizationService;
        this.deleterFactory = deleterFactory;
        this.builderFactory = builderFactory;
        this.conventionService = conventionService;
        this.messageSource = messageSource;
        this.queryFactory = queryFactory;
        this.responseUtilsService = responseUtilsService;
        this.xmlHandlingService = xmlHandlingService;
        this.errors = errors;
        this.encryptionService = encryptionService;
        this.properties = properties;
    }

    @Override
    public Tenant persist(TenantPersist model, FieldSet fields) throws MyForbiddenException, MyValidationException, MyApplicationException, MyNotFoundException, InvalidApplicationException, InvalidAlgorithmParameterException, NoSuchPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException, BadPaddingException, InvalidKeyException {
        logger.debug(new MapLogEntry("persisting data").And("model", model).And("fields", fields));

        this.authorizationService.authorizeForce(Permission.EditTenant);

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

        TenantEntity data;
        if (isUpdate) {
            data = this.entityManager.find(TenantEntity.class, model.getId());
            if (data == null)
                throw new MyNotFoundException(messageSource.getMessage("General_ItemNotFound", new Object[]{model.getId(), Tenant.class.getSimpleName()}, LocaleContextHolder.getLocale()));
            if (!this.conventionService.hashValue(data.getUpdatedAt()).equals(model.getHash()))
                throw new MyValidationException(this.errors.getHashConflict().getCode(), this.errors.getHashConflict().getMessage());
        } else {
            data = new TenantEntity();
            data.setId(UUID.randomUUID());
            data.setIsActive(IsActive.Active);
            data.setCreatedAt(Instant.now());
        }

        data.setCode(model.getCode());
        data.setName(model.getName());
        data.setDescription(model.getDescription());
        data.setUpdatedAt(Instant.now());
        data.setConfig(this.xmlHandlingService.toXmlSafe(this.buildConfigEntity(model.getConfig())));

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

        this.entityManager.flush();

        return this.builderFactory.builder(TenantBuilder.class).authorize(AuthorizationFlags.OwnerOrDmpAssociatedOrPermission).build(BaseFieldSet.build(fields, Tenant._id), data);
    }

    private @NotNull TenantConfigEntity buildConfigEntity(TenantConfigPersist persist) throws InvalidAlgorithmParameterException, NoSuchPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException, BadPaddingException, InvalidKeyException {
        TenantConfigEntity data = new TenantConfigEntity();
        if (persist == null) return data;
        if (persist.getDeposit() != null) {
            data.setDeposit(this.buildDepositConfigEntity(persist.getDeposit()));
        }
        if (persist.getFileTransformers() != null) {
            data.setFileTransformers(this.buildFileConfigEntity(persist.getFileTransformers()));
        }

        return data;
    }

    private @NotNull TenantDepositConfigEntity buildDepositConfigEntity(TenantDepositConfigPersist persist) throws InvalidAlgorithmParameterException, NoSuchPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException, BadPaddingException, InvalidKeyException {
        TenantDepositConfigEntity data = new TenantDepositConfigEntity();
        if (persist == null) return data;

        if (!this.conventionService.isListNullOrEmpty(persist.getSources())) {
            data.setSources(new ArrayList<>());
            for (TenantSourcePersist sourcePersist : persist.getSources()) {
                data.getSources().add(this.buildSourceEntity(sourcePersist));
            }
        }

        return data;
    }

    private @NotNull TenantFileTransformersConfigEntity buildFileConfigEntity(TenantFileTransformersConfigPersist persist) throws InvalidAlgorithmParameterException, NoSuchPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException, BadPaddingException, InvalidKeyException {
        TenantFileTransformersConfigEntity data = new TenantFileTransformersConfigEntity();
        if (persist == null) return data;

        if (!this.conventionService.isListNullOrEmpty(persist.getSources())) {
            data.setSources(new ArrayList<>());
            for (TenantSourcePersist sourcePersist : persist.getSources()) {
                data.getSources().add(this.buildSourceEntity(sourcePersist));
            }
        }

        return data;
    }

    private @NotNull TenantSourceEntity buildSourceEntity(TenantSourcePersist persist) throws NoSuchAlgorithmException, InvalidAlgorithmParameterException, NoSuchPaddingException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException {
        TenantSourceEntity data = new TenantSourceEntity();
        if (persist == null) return data;

        data.setUrl(persist.getUrl());
        data.setCodes(persist.getCodes());
        data.setIssuerUrl(persist.getIssuerUrl());
        data.setClientId(persist.getClientId());
        data.setClientSecret(this.encryptionService.encryptAES(persist.getClientSecret(), properties.getConfigEncryptionAesKey(), properties.getConfigEncryptionAesIv()));
        //data.setClientSecret(persist.getClientSecret());

        data.setScope(persist.getScope());

        return data;
    }

    @Override
    public Tenant decryptTenant(Tenant model) throws InvalidAlgorithmParameterException, NoSuchPaddingException, IllegalBlockSizeException, NoSuchAlgorithmException, BadPaddingException, InvalidKeyException {
        if (model.getConfig() != null && model.getConfig().getDeposit() != null && model.getConfig().getDeposit().getSources() != null) {
            for (TenantSource source : model.getConfig().getDeposit().getSources().stream().collect(Collectors.toList())) {
                source.setClientSecret(this.encryptionService.decryptAES(source.getClientSecret(), properties.getConfigEncryptionAesKey(), properties.getConfigEncryptionAesIv()));
            }
        }
        if (model.getConfig() != null && model.getConfig().getFileTransformers() != null && model.getConfig().getFileTransformers().getSources() != null) {
            for (TenantSource source : model.getConfig().getFileTransformers().getSources().stream().collect(Collectors.toList())) {
                source.setClientSecret(this.encryptionService.decryptAES(source.getClientSecret(), properties.getConfigEncryptionAesKey(), properties.getConfigEncryptionAesIv()));
            }
        }
        return model;
    }

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

        this.authorizationService.authorizeForce(Permission.DeleteTenant);

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

}