/*-
 * ============LICENSE_START=======================================================
 *  Copyright (C) 2019 Nordix Foundation.
 *  Modifications Copyright (C) 2019 AT&T Intellectual Property.
 *  Modifications Copyright (C) 2020-2021 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.onap.policy.pap.main.parameters;

import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.io.FileNotFoundException;
import org.junit.Test;
import org.onap.policy.common.utils.cmd.CommandLineException;
import org.onap.policy.common.utils.coder.CoderException;
import org.onap.policy.pap.main.PolicyPapException;
import org.onap.policy.pap.main.startstop.PapCommandLineArguments;

/**
 * Class to perform unit test of {@link PapParameterHandler}.
 *
 * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
 */
public class TestPapParameterHandler {

    @Test
    public void testParameterHandlerNoParameterFile() throws PolicyPapException, CommandLineException {
        final String[] noArgumentString = { "-c", "parameters/NoParameterFile.json" };

        final PapCommandLineArguments noArguments = new PapCommandLineArguments();
        noArguments.parse(noArgumentString);

        assertThatThrownBy(() -> new PapParameterHandler().getParameters(noArguments))
            .hasCauseInstanceOf(CoderException.class)
            .hasRootCauseInstanceOf(FileNotFoundException.class);
    }

    @Test
    public void testParameterHandlerEmptyParameters() throws PolicyPapException, CommandLineException {
        final String[] emptyArgumentString = { "-c", "parameters/EmptyParameters.json" };

        final PapCommandLineArguments emptyArguments = new PapCommandLineArguments();
        emptyArguments.parse(emptyArgumentString);

        assertThatThrownBy(() -> new PapParameterHandler().getParameters(emptyArguments))
            .hasMessageContaining("no parameters found in \"parameters/EmptyParameters.json\"");
    }

    @Test
    public void testParameterHandlerInvalidParameters() throws PolicyPapException, CommandLineException {
        final String[] invalidArgumentString = { "-c", "parameters/InvalidParameters.json" };

        final PapCommandLineArguments invalidArguments = new PapCommandLineArguments();
        invalidArguments.parse(invalidArgumentString);

        assertThatThrownBy(() -> new PapParameterHandler().getParameters(invalidArguments))
            .hasMessageStartingWith("error reading parameters from \"parameters/InvalidParameters.json\"")
            .hasCauseInstanceOf(CoderException.class);
    }

    @Test
    public void testParameterHandlerNoParameters() throws PolicyPapException, CommandLineException {
        final String[] noArgumentString = { "-c", "parameters/NoParameters.json" };

        final PapCommandLineArguments noArguments = new PapCommandLineArguments();
        noArguments.parse(noArgumentString);

        assertThatThrownBy(() -> new PapParameterHandler().getParameters(noArguments)).hasMessageContaining("is null");
    }

    @Test
    public void testParameterHandlerMinumumParameters() throws PolicyPapException, CommandLineException {
        final String[] minArgumentString = { "-c", "parameters/MinimumParameters.json" };

        final PapCommandLineArguments minArguments = new PapCommandLineArguments();
        minArguments.parse(minArgumentString);

        final PapParameterGroup parGroup = new PapParameterHandler().getParameters(minArguments);
        assertEquals(CommonTestData.PAP_GROUP_NAME, parGroup.getName());
    }

    @Test
    public void testPapParameterGroup() throws PolicyPapException, CommandLineException {
        final String[] papConfigParameters = { "-c", "parameters/PapConfigParameters.json" };

        final PapCommandLineArguments arguments = new PapCommandLineArguments();
        arguments.parse(papConfigParameters);

        final PapParameterGroup parGroup = new PapParameterHandler().getParameters(arguments);
        assertTrue(arguments.checkSetConfigurationFilePath());
        assertEquals(CommonTestData.PAP_GROUP_NAME, parGroup.getName());
    }

    @Test
    public void testPapParameterGroup_InvalidName() throws PolicyPapException, CommandLineException {
        final String[] papConfigParameters = { "-c", "parameters/PapConfigParameters_InvalidName.json" };

        final PapCommandLineArguments arguments = new PapCommandLineArguments();
        arguments.parse(papConfigParameters);

        assertThatThrownBy(() -> new PapParameterHandler().getParameters(arguments))
            .hasMessageContaining("field \"name\" type \"java.lang.String\" value \" \" "
                + "INVALID, must be a non-blank string");
    }

    @Test
    public void testPapVersion() throws PolicyPapException, CommandLineException {
        final String[] papConfigParameters = { "-v" };
        final PapCommandLineArguments arguments = new PapCommandLineArguments();
        final String version = arguments.parse(papConfigParameters);
        assertTrue(version.startsWith("ONAP Policy Framework PAP Service"));
    }

    @Test
    public void testPapHelp() throws PolicyPapException, CommandLineException {
        final String[] papConfigParameters = { "-h" };
        final PapCommandLineArguments arguments = new PapCommandLineArguments();
        final String help = arguments.parse(papConfigParameters);
        assertTrue(help.startsWith("usage:"));
    }

    @Test
    public void testPapInvalidOption() throws PolicyPapException, CommandLineException {
        final String[] papConfigParameters = { "-d" };
        final PapCommandLineArguments arguments = new PapCommandLineArguments();
        assertThatThrownBy(() -> arguments.parse(papConfigParameters))
            .hasMessageStartingWith("invalid command line arguments specified");
    }
}