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/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2020 Nokia. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */
package org.openecomp.sdc.be.components.impl.validation;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;
import org.onap.validation.yaml.YamlContentValidator;
import org.onap.validation.yaml.error.YamlDocumentValidationError;
import org.openecomp.sdc.common.api.ArtifactTypeEnum;

public class PMDictionaryValidator {

    private final YamlContentValidator yamlContentValidator;

    public PMDictionaryValidator() {
        this(new YamlContentValidator());
    }

    PMDictionaryValidator(YamlContentValidator yamlContentValidator) {
        this.yamlContentValidator = yamlContentValidator;
    }

    public Optional<String> validateIfPmDictionary(String artifactType, byte[] decodedPayload) {
        if (isPmDictionary(artifactType)) {
            return validate(decodedPayload).stream()
                .reduce((a, b) -> a + "; " + b);
        }
        return Optional.empty();
    }

    private boolean isPmDictionary(String artifactType) {
        return ArtifactTypeEnum.PM_DICTIONARY.name().equals(artifactType);
    }

    private List<String> validate(byte[] fileContent) {
        List<String> errors = new ArrayList<>();
        try {
            List<YamlDocumentValidationError> validationErrors = yamlContentValidator.validate(fileContent);
            validationErrors.stream()
                .map(this::formatErrorMessage)
                .forEach(errors::add);
        } catch (Exception e) {
            errors.add(e.getMessage());
        }
        return errors;
    }

    private String formatErrorMessage(YamlDocumentValidationError error) {
        return String.format("Document number: %d, Path: %s, Message: %s",
            error.getYamlDocumentNumber(),
            error.getPath(),
            error.getMessage());
    }

}