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/*
 * Copyright © 2016-2017 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 java.util.Collection;
import java.util.stream.Collectors;
import org.apache.commons.collections4.CollectionUtils;
import org.openecomp.core.utilities.json.JsonUtil;
import org.openecomp.sdc.common.errors.CoreException;
import org.openecomp.sdc.common.errors.ErrorCode;
import org.openecomp.sdc.vendorsoftwareproduct.CompositionEntityDataManager;
import org.openecomp.sdc.vendorsoftwareproduct.ImageManager;
import org.openecomp.sdc.vendorsoftwareproduct.dao.ImageDao;
import org.openecomp.sdc.vendorsoftwareproduct.dao.VendorSoftwareProductInfoDao;
import org.openecomp.sdc.vendorsoftwareproduct.dao.type.ComponentEntity;
import org.openecomp.sdc.vendorsoftwareproduct.dao.type.ImageEntity;
import org.openecomp.sdc.vendorsoftwareproduct.dao.type.VspDetails;
import org.openecomp.sdc.vendorsoftwareproduct.errors.ImageErrorBuilder;
import org.openecomp.sdc.vendorsoftwareproduct.errors.NotSupportedHeatOnboardMethodErrorBuilder;
import org.openecomp.sdc.vendorsoftwareproduct.services.schemagenerator.SchemaGenerator;
import org.openecomp.sdc.vendorsoftwareproduct.types.CompositionEntityResponse;
import org.openecomp.sdc.vendorsoftwareproduct.types.QuestionnaireResponse;
import org.openecomp.sdc.vendorsoftwareproduct.types.composition.CompositionEntityType;
import org.openecomp.sdc.vendorsoftwareproduct.types.composition.CompositionEntityValidationData;
import org.openecomp.sdc.vendorsoftwareproduct.types.composition.Image;
import org.openecomp.sdc.vendorsoftwareproduct.types.composition.ImageFormat;
import org.openecomp.sdc.vendorsoftwareproduct.types.questionnaire.component.image.ImageDetails;
import org.openecomp.sdc.vendorsoftwareproduct.types.schemagenerator.ImageCompositionSchemaInput;
import org.openecomp.sdc.vendorsoftwareproduct.types.schemagenerator.SchemaTemplateContext;
import org.openecomp.sdc.vendorsoftwareproduct.types.schemagenerator.SchemaTemplateInput;
import org.openecomp.sdc.versioning.VersioningUtil;
import org.openecomp.sdc.versioning.dao.types.Version;

public class ImageManagerImpl implements ImageManager {

    private final VendorSoftwareProductInfoDao vspInfoDao;
    private final ImageDao imageDao;
    private final CompositionEntityDataManager compositionEntityDataManager;

    public ImageManagerImpl(VendorSoftwareProductInfoDao vspInfoDao, ImageDao imageDao, CompositionEntityDataManager compositionEntityDataManager) {
        this.vspInfoDao = vspInfoDao;
        this.imageDao = imageDao;
        this.compositionEntityDataManager = compositionEntityDataManager;
    }

    @Override
    public ImageEntity createImage(ImageEntity imageEntity) {
        boolean isManual = vspInfoDao.isManual(imageEntity.getVspId(), imageEntity.getVersion());
        if (!isManual) {
            ErrorCode errorCode = NotSupportedHeatOnboardMethodErrorBuilder.getAddImageNotSupportedHeatOnboardMethodErrorBuilder();
            throw new CoreException(errorCode);
        }
        compositionEntityDataManager.createImage(imageEntity);
        return imageEntity;
    }

    @Override
    public Collection<ImageEntity> listImages(String vspId, Version version, String componentId) {
        return imageDao.list(new ImageEntity(vspId, version, componentId, null));
    }

    @Override
    public CompositionEntityResponse<Image> getImageSchema(String vspId) {
        CompositionEntityResponse<Image> response = new CompositionEntityResponse<>();
        ImageCompositionSchemaInput inputSchema = new ImageCompositionSchemaInput();
        Image image = new Image();
        inputSchema.setImage(image);
        response.setSchema(getImageCompositionSchema(inputSchema));
        return response;
    }

    @Override
    public CompositionEntityResponse<Image> getImage(String vspId, Version version, String componentId, String imageId) {
        ImageEntity imageEntity = getImageEntity(vspId, version, componentId, imageId);
        Image image = imageEntity.getImageCompositionData();
        ImageCompositionSchemaInput schemaInput = new ImageCompositionSchemaInput();
        schemaInput.setImage(image);
        CompositionEntityResponse<Image> response = new CompositionEntityResponse<>();
        response.setId(imageId);
        response.setData(image);
        response.setSchema(getImageCompositionSchema(schemaInput));
        return response;
    }

    @Override
    public QuestionnaireResponse getImageQuestionnaire(String vspId, Version version, String componentId, String imageId) {
        QuestionnaireResponse questionnaireResponse = new QuestionnaireResponse();
        ImageEntity retrieved = imageDao.getQuestionnaireData(vspId, version, componentId, imageId);
        VersioningUtil.validateEntityExistence(retrieved, new ImageEntity(vspId, version, componentId, imageId), ComponentEntity.ENTITY_TYPE);
        questionnaireResponse.setData(retrieved.getQuestionnaireData());
        questionnaireResponse.setSchema(getImageQuestionnaireSchema(null));
        return questionnaireResponse;
    }

    @Override
    public void deleteImage(String vspId, Version version, String componentId, String imageId) {
        ImageEntity imageEntity = getImageEntity(vspId, version, componentId, imageId);
        if (!vspInfoDao.isManual(vspId, version)) {
            final ErrorCode deleteImageErrorBuilder = NotSupportedHeatOnboardMethodErrorBuilder
                .getDelImageNotSupportedHeatOnboardMethodErrorBuilder();
            throw new CoreException(deleteImageErrorBuilder);
        }
        if (imageEntity != null) {
            imageDao.delete(new ImageEntity(vspId, version, componentId, imageId));
        }
    }

    private void validateHeatVspImageUpdate(String name, String value, String retrievedValue) {
        if (value != null && !value.equals(retrievedValue)) {
            final ErrorCode updateHeatImageErrorBuilder = ImageErrorBuilder.getImageHeatReadOnlyErrorBuilder(name);
            throw new CoreException(updateHeatImageErrorBuilder);
        }
    }

    @Override
    public CompositionEntityValidationData updateImage(ImageEntity image) {
        boolean isManual = vspInfoDao.isManual(image.getVspId(), image.getVersion());
        ImageEntity retrieved = getImageEntity(image.getVspId(), image.getVersion(), image.getComponentId(), image.getId());
        Collection<ImageEntity> vfcImageList = listImages(image.getVspId(), image.getVersion(), image.getComponentId());
        //Set to null so that retrieved object is equal to one in list and gets removed.
        retrieved.setQuestionnaireData(null);
        vfcImageList.remove(retrieved);
        ImageCompositionSchemaInput schemaInput = new ImageCompositionSchemaInput();
        schemaInput.setManual(isManual);
        schemaInput.setImage(retrieved.getImageCompositionData());
        CompositionEntityValidationData validationData = compositionEntityDataManager
            .validateEntity(image, SchemaTemplateContext.composition, schemaInput);
        if (CollectionUtils.isEmpty(validationData.getErrors())) {
            imageDao.update(image);
        }
        return validationData;
    }

    @Override
    public void updateImageQuestionnaire(String vspId, Version version, String componentId, String imageId, String questionnaireData) {
        getImageEntity(vspId, version, componentId, imageId);
        final ImageDetails image = JsonUtil.json2Object(questionnaireData, ImageDetails.class);
        final String format = image.getFormat();
        try {
            if (format != null) {
                ImageFormat.valueOf(format);
            }
        } catch (IllegalArgumentException exception) {
            ErrorCode errorCode = ImageErrorBuilder.getInvalidImageFormatErrorBuilder();
            throw new CoreException(errorCode, exception);
        }
        //Validate Format is read only for HEAT Onboarding
        if (!vspInfoDao.isManual(vspId, version)) {
            final QuestionnaireResponse imageQuestionnaire = getImageQuestionnaire(vspId, version, componentId, imageId);
            final String data = imageQuestionnaire.getData();
            if (data != null) {
                String retrievedFormat = JsonUtil.json2Object(data, ImageDetails.class).getFormat();
                validateHeatVspImageUpdate("format", format, retrievedFormat);
            }
        }
        if (!isImageVersionUnique(vspId, version, componentId, imageId, image)) {
            ErrorCode errorCode = ImageErrorBuilder.getDuplicateImageVersionErrorBuilder(image.getVersion(), componentId);
            throw new CoreException(errorCode);
        }
        imageDao.updateQuestionnaireData(vspId, version, componentId, imageId, questionnaireData);
    }

    private boolean isImageVersionUnique(String vspId, Version version, String componentId, String imageId, ImageDetails image) {
        boolean isPresent = true;
        if (image != null && image.getVersion() != null) {
            Collection<ImageEntity> imageEntities = imageDao.list(new ImageEntity(vspId, version, componentId, null));
            if (CollectionUtils.isNotEmpty(imageEntities)) {
                imageEntities = imageEntities.stream().filter(
                    imageEntity -> image.getVersion().trim().equalsIgnoreCase(getImageVersion(vspId, version, componentId, imageEntity))
                        && !imageEntity.getId().equals(imageId)).collect(Collectors.toList());
                isPresent = CollectionUtils.isEmpty(imageEntities);
            }
        }
        return isPresent;
    }

    private String getImageVersion(String vspId, Version version, String componentId, ImageEntity imageEntity) {
        QuestionnaireResponse imageQuestionnaire = getImageQuestionnaire(vspId, version, componentId, imageEntity.getId());
        ImageDetails imageDetails = JsonUtil.json2Object(imageQuestionnaire.getData(), ImageDetails.class);
        return imageDetails == null ? null : imageDetails.getVersion() != null ? imageDetails.getVersion().trim() : null;
    }

    private ImageEntity getImageEntity(String vspId, Version version, String componentId, String imageId) {
        ImageEntity imageEntity = imageDao.get(new ImageEntity(vspId, version, componentId, imageId));
        VersioningUtil.validateEntityExistence(imageEntity, new ImageEntity(vspId, version, componentId, imageId), VspDetails.ENTITY_TYPE);
        return imageEntity;
    }

    protected String getImageCompositionSchema(SchemaTemplateInput schemaInput) {
        return SchemaGenerator.generate(SchemaTemplateContext.composition, CompositionEntityType.image, schemaInput);
    }

    protected String getImageQuestionnaireSchema(SchemaTemplateInput schemaInput) {
        return SchemaGenerator.generate(SchemaTemplateContext.questionnaire, CompositionEntityType.image, schemaInput);
    }
}