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/*
 * Copyright © 2016-2018 European Support Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.openecomp.sdc.vendorsoftwareproduct.impl;

import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.lang3.tuple.ImmutablePair;
import org.apache.commons.lang3.tuple.Pair;
import org.openecomp.core.utilities.json.JsonUtil;
import org.openecomp.core.utilities.orchestration.OnboardingTypesEnum;
import org.openecomp.sdc.common.errors.CoreException;
import org.openecomp.sdc.common.utils.CommonUtil;
import org.openecomp.sdc.common.utils.SdcCommon;
import org.openecomp.sdc.datatypes.error.ErrorMessage;
import org.openecomp.sdc.vendorsoftwareproduct.OrchestrationTemplateCandidateManager;
import org.openecomp.sdc.vendorsoftwareproduct.dao.VendorSoftwareProductInfoDao;
import org.openecomp.sdc.vendorsoftwareproduct.dao.type.OrchestrationTemplateCandidateData;
import org.openecomp.sdc.vendorsoftwareproduct.dao.type.VspDetails;
import org.openecomp.sdc.vendorsoftwareproduct.errors.OrchestrationTemplateNotFoundErrorBuilder;
import org.openecomp.sdc.vendorsoftwareproduct.impl.orchestration.OrchestrationTemplateFileHandler;
import org.openecomp.sdc.vendorsoftwareproduct.impl.orchestration.OrchestrationUploadFactory;
import org.openecomp.sdc.vendorsoftwareproduct.impl.orchestration.process.OrchestrationProcessFactory;
import org.openecomp.sdc.vendorsoftwareproduct.services.filedatastructuremodule.CandidateService;
import org.openecomp.sdc.vendorsoftwareproduct.types.OrchestrationTemplateActionResponse;
import org.openecomp.sdc.vendorsoftwareproduct.types.UploadFileResponse;
import org.openecomp.sdc.vendorsoftwareproduct.types.ValidationResponse;
import org.openecomp.sdc.vendorsoftwareproduct.types.candidateheat.FilesDataStructure;
import org.openecomp.sdc.versioning.dao.types.Version;

import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;

public class OrchestrationTemplateCandidateManagerImpl
    implements OrchestrationTemplateCandidateManager {

  private final VendorSoftwareProductInfoDao vspInfoDao;
  private final CandidateService candidateService;

  public OrchestrationTemplateCandidateManagerImpl(VendorSoftwareProductInfoDao vspInfoDao,
                                                   CandidateService candidateService
  ) {
    this.vspInfoDao = vspInfoDao;
    this.candidateService = candidateService;
  }

  @Override
  public UploadFileResponse upload(String vspId, Version version, InputStream fileToUpload,
                                   String fileSuffix, String networkPackageName) {
    OrchestrationTemplateFileHandler orchestrationTemplateFileHandler =
        OrchestrationUploadFactory.createOrchestrationTemplateFileHandler(fileSuffix);

    VspDetails vspDetails = getVspDetails(vspId, version);

    UploadFileResponse uploadResponse = orchestrationTemplateFileHandler
        .upload(vspDetails, fileToUpload, fileSuffix, networkPackageName, candidateService);

    uploadResponse.setNetworkPackageName(networkPackageName);
    return uploadResponse;
  }

  @Override
  public OrchestrationTemplateActionResponse process(String vspId, Version version) {
    OrchestrationTemplateCandidateData candidate = fetchCandidateDataEntity(vspId, version)
        .orElseThrow(
            () -> new CoreException(new OrchestrationTemplateNotFoundErrorBuilder(vspId).build()));

    return OrchestrationProcessFactory.getInstance(candidate.getFileSuffix())
        .map(processor -> processor.process(getVspDetails(vspId, version), candidate))
        .orElse(new OrchestrationTemplateActionResponse());
  }

  @Override
  public Optional<FilesDataStructure> getFilesDataStructure(String vspId, Version version) {
    return candidateService.getOrchestrationTemplateCandidateFileDataStructure(vspId, version);
  }

  @Override
  public ValidationResponse updateFilesDataStructure(String vspId, Version version,
                                                     FilesDataStructure fileDataStructure) {
    ValidationResponse response = new ValidationResponse();
    Optional<List<ErrorMessage>> validateErrors =
        candidateService.validateFileDataStructure(fileDataStructure);
    if (validateErrors.isPresent()) {
      List<ErrorMessage> errorMessages = validateErrors.get();
      if (CollectionUtils.isNotEmpty(errorMessages)) {
        Map<String, List<ErrorMessage>> errorsMap = Collections.singletonMap(SdcCommon.UPLOAD_FILE, errorMessages);
        response.setUploadDataErrors(errorsMap);
        return response;
      }
    }
    candidateService
        .updateOrchestrationTemplateCandidateFileDataStructure(vspId, version, fileDataStructure);
    return response;
  }

  @Override

  public Optional<Pair<String, byte[]>> get(String vspId, Version version) throws IOException {
    VspDetails vspDetails = getVspDetails(vspId, version);

    Optional<OrchestrationTemplateCandidateData> candidateDataEntity =
        fetchCandidateDataEntity(vspId, version);

    if (!candidateDataEntity.isPresent()) {
      return Optional.empty();
    }

    if(Objects.isNull(candidateDataEntity.get().getFileSuffix())) {
      return Optional.empty();
    }

    OnboardingTypesEnum type =
        OnboardingTypesEnum.getOnboardingTypesEnum(candidateDataEntity.get().getFileSuffix());

    if (CommonUtil.isFileOriginFromZip(candidateDataEntity.get().getFileSuffix())) {
      FilesDataStructure structure = JsonUtil
          .json2Object(candidateDataEntity.get().getFilesDataStructure(), FilesDataStructure.class);
      String manifest = candidateService.createManifest(vspDetails, structure);
      return Optional.of(
          new ImmutablePair<>(OnboardingTypesEnum.ZIP.toString(), candidateService
              .replaceManifestInZip(candidateDataEntity.get().getContentData(),
                  manifest, vspId, type)));
    }

    return Optional.of(
        new ImmutablePair<>(candidateDataEntity.get().getFileSuffix(), candidateDataEntity.get()
            .getContentData().array()));
  }

  @Override
  public OrchestrationTemplateCandidateData getInfo(String vspId, Version version) {
    return candidateService.getOrchestrationTemplateCandidateInfo(vspId, version);
  }

  @Override
  public void abort(String vspId, Version version) {
    candidateService.deleteOrchestrationTemplateCandidate(vspId, version);
  }

  private Optional<OrchestrationTemplateCandidateData> fetchCandidateDataEntity(
      String vspId, Version version) {
    return Optional
        .ofNullable(candidateService.getOrchestrationTemplateCandidate(vspId, version));
  }

  private VspDetails getVspDetails(String vspId, Version version) {

    return vspInfoDao.get(new VspDetails(vspId, version));
  }


}