/*
 * ============LICENSE_START=======================================================
 *  Copyright (C) 2020 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.sdc.be.plugins.etsi.nfv.nsd.generator;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.contains;
import static org.hamcrest.core.Is.is;
import static org.hamcrest.core.IsNull.notNullValue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Path;
import java.nio.file.Paths;
import org.apache.commons.io.IOUtils;
import org.junit.jupiter.api.Test;
import org.openecomp.sdc.be.model.ArtifactDefinition;
import org.openecomp.sdc.be.plugins.etsi.nfv.nsd.exception.VnfDescriptorException;
import org.openecomp.sdc.be.plugins.etsi.nfv.nsd.model.VnfDescriptor;

class VnfDescriptorGeneratorImplTest {

    private final VnfDescriptorGeneratorImpl vnfDescriptorGenerator = new VnfDescriptorGeneratorImpl();
    private final Path testResourcesPath = Paths.get("src", "test", "resources", "vnf-onboarded-csar");

    @Test
    void testGenerate() throws IOException, VnfDescriptorException {
        final byte[] onboardedPackage = getResourceAsByteArray("TestVnf.csar");
        final ArtifactDefinition artifactDefinition = new ArtifactDefinition();
        artifactDefinition.setPayload(onboardedPackage);
        artifactDefinition.setArtifactName("vnf-onboarded-csar.csar");
        final String vnfDescriptorName = "vnf-onboarded-csar";
        final VnfDescriptor vnfDescriptor = vnfDescriptorGenerator.generate(vnfDescriptorName, artifactDefinition).orElse(null);
        final String expectedNodeType = "org.onap.resource.testVnf";
        final String expectedVnfdFileName = "test_vnfd.yaml";
        assertThat("Vnf Descriptor should be present", vnfDescriptor, is(notNullValue()));
        assertThat("Vnf Descriptor should have the expected name", vnfDescriptor.getName(), is(vnfDescriptorName));
        assertThat("Vnf Descriptor should have the expected node type", vnfDescriptor.getNodeType(), is(expectedNodeType));
        assertThat("Vnf Descriptor should have the expected vnfd file name", vnfDescriptor.getVnfdFileName(), is(expectedVnfdFileName));
        assertThat("Vnf Descriptor should contain the expected definition files count", vnfDescriptor.getDefinitionFiles().size(), is(2));
        assertTrue("Vnf Descriptor should contain the expected definition entries", vnfDescriptor.getDefinitionFiles().keySet().contains("Definitions/test_vnfd.yaml"));
        assertTrue("Vnf Descriptor should contain the expected definition entries", vnfDescriptor.getDefinitionFiles().keySet().contains("Definitions/etsi_nfv_sol001_vnfd_2_5_1_types.yaml"));
        
        final String vnfdContents = new String(vnfDescriptor.getDefinitionFiles().get("Definitions/test_vnfd.yaml"), StandardCharsets.UTF_8);
        assertFalse(vnfdContents.contains("interfaces:"));
    }
    

    private byte[] getResourceAsByteArray(final String filename) throws IOException {
        try (final InputStream inputStream = readFileAsStream(filename)) {
            return IOUtils.toByteArray(inputStream);
        } catch (final IOException ex) {
            throw new IOException(String.format("Could not read the file \"%s\"", filename), ex);
        }
    }

    private FileInputStream readFileAsStream(final String fileName) throws FileNotFoundException {
        final Path path = Paths.get(testResourcesPath.toString(), fileName);
        return new FileInputStream(path.toFile());
    }
}