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/*-
 * ============LICENSE_START=======================================================
 *  Modification Copyright (C) 2019 Nordix Foundation.
 * ================================================================================
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 * ============LICENSE_END=========================================================
 */

package org.openecomp.core.impl.services;

import org.onap.sdc.tosca.services.YamlUtil;
import org.openecomp.core.converter.ServiceTemplateReaderService;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import org.openecomp.sdc.be.utils.TypeUtils.ToscaTagNamesEnum;

import static org.openecomp.core.converter.datatypes.Constants.*;

public class ServiceTemplateReaderServiceImpl implements ServiceTemplateReaderService {

    private Map<String, Object> readServiceTemplate = new HashMap<>();

    public ServiceTemplateReaderServiceImpl(byte[] serviceTemplateContent) {
        this.readServiceTemplate = readServiceTemplate(serviceTemplateContent);
    }

    @Override
    public Map<String, Object> readServiceTemplate(byte[] serviceTemplateContent) {

        return new YamlUtil().yamlToObject(new String(serviceTemplateContent), Map.class);

    }

    @Override
    public List<Object> getImports() {
        return Objects.isNull(this.readServiceTemplate.get("imports")) ? new ArrayList<>()
                       : (List<Object>) this.readServiceTemplate.get("imports");
    }

    @Override
    public Map<String, Object> getPolicies() {
        Map<String, Object> policiesAsMap = new HashMap<>();
        if (!Objects.isNull(this.getTopologyTemplate()) && !Objects.isNull(
                ((Map<String, Object>) this.getTopologyTemplate()).get(POLICIES))) {
            policiesAsMap = (Map<String, Object>) ((Map<String, Object>) this.getTopologyTemplate()).get(POLICIES);
        }
        return policiesAsMap;
    }

    @Override
    public Object getMetadata() {
        return this.readServiceTemplate.get(metadata);
    }

    @Override
    public Object getToscaVersion() {
        return this.readServiceTemplate.get(ToscaTagNamesEnum.TOSCA_VERSION.getElementName());
    }

    @Override
    public Map<String, Object> getNodeTypes() {
        return Objects.isNull(this.readServiceTemplate.get(nodeTypes)) ? new HashMap<>()
                       : (Map<String, Object>) this.readServiceTemplate.get(nodeTypes);
    }

    @Override
    public Object getTopologyTemplate() {
        return this.readServiceTemplate.get(topologyTemplate);
    }

    @Override
    public Map<String, Object> getNodeTemplates() {
        return Objects.isNull(this.getTopologyTemplate()) ? new HashMap<>()
                       : (Map<String, Object>) ((Map<String, Object>) this.getTopologyTemplate()).get(nodeTemplates);
    }

    @Override
    public Map<String, Object> getInputs() {
        return Objects.isNull(this.getTopologyTemplate()) ? new HashMap<>()
                       : (Map<String, Object>) ((Map<String, Object>) this.getTopologyTemplate()).get(inputs);
    }

    @Override
    public Map<String, Object> getOutputs() {
        return Objects.isNull(this.getTopologyTemplate()) ? new HashMap<>()
                       : (Map<String, Object>) ((Map<String, Object>) this.getTopologyTemplate()).get(outputs);
    }

    @Override
    public Map<String, Object> getSubstitutionMappings() {
        return Objects.isNull(this.getTopologyTemplate()) ? new HashMap<>()
                       : (Map<String, Object>) ((Map<String, Object>) this.getTopologyTemplate())
                                                       .get(substitutionMappings);
    }
}