/*
 * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.controller.sal.restconf.impl.nn.to.json.test;

import static org.junit.Assert.assertTrue;

import java.io.ByteArrayOutputStream;
import java.io.OutputStream;
import javax.ws.rs.core.MediaType;
import org.junit.BeforeClass;
import org.junit.Test;
import org.opendaylight.controller.md.sal.rest.common.TestRestconfUtils;
import org.opendaylight.controller.sal.rest.impl.test.providers.AbstractBodyReaderTest;
import org.opendaylight.netconf.sal.rest.impl.NormalizedNodeJsonBodyWriter;
import org.opendaylight.restconf.common.context.NormalizedNodeContext;
import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;

public class NnJsonChoiceCaseTest extends AbstractBodyReaderTest {

    private static EffectiveModelContext schemaContext;
    private final NormalizedNodeJsonBodyWriter jsonBodyWriter;

    public NnJsonChoiceCaseTest()  {
        super(schemaContext, null);
        jsonBodyWriter = new NormalizedNodeJsonBodyWriter();
    }

    @BeforeClass
    public static void initialization() {
        schemaContext = schemaContextLoader("/nn-to-json/choice", schemaContext);
    }

    /**
     * Test when some data are in one case node and other in another. This isn't
     * correct. Next Json validator should return error because nodes has to be
     * from one case below concrete choice.
     */
    @Test(expected = NullPointerException.class)
    public void nodeSchemasOnVariousChoiceCasePathTest() throws Exception {
        getJson("/nn-to-json/choice/xml/data_various_path_err.xml");
    }

    /**
     * Test when some data are in one case node and other in another.
     * Additionally data are loadef from various choices. This isn't correct.
     * Next Json validator should return error because nodes has to be from one
     * case below concrete choice.
     */
    @Test(expected = NullPointerException.class)
    public void nodeSchemasOnVariousChoiceCasePathAndMultipleChoicesTest()
            throws Exception {
        getJson("/nn-to-json/choice/xml/data_more_choices_same_level_various_paths_err.xml");
    }

    /**
     * Test when second level data are red first, then first and at the end
     * third level. Level represents pass through couple choice-case
     */

    @Test
    public void nodeSchemasWithRandomOrderAccordingLevel() throws Exception {
        final String json = getJson("/nn-to-json/choice/xml/data_random_level.xml");

        assertTrue(json.contains("cont"));
        assertTrue(json.contains("\"lf1\":\"lf1 val\""));
        assertTrue(json.contains("\"lf1aaa\":\"lf1aaa val\""));
        assertTrue(json.contains("\"lf1aa\":\"lf1aa val\""));
        assertTrue(json.contains("\"lf1a\":121"));
    }

    /**
     * Test when element from no first case is used.
     */
    @Test
    public void nodeSchemasNotInFirstCase() throws Exception {
        final String json = getJson("/nn-to-json/choice/xml/data_no_first_case.xml");

        assertTrue(json.contains("cont"));
        assertTrue(json.contains("\"lf1\":\"lf1 val\""));
        assertTrue(json.contains("\"lf1ab\":\"lf1ab val\""));
        assertTrue(json.contains("\"lf1a\":121"));
    }

    /**
     * Test when element in case is list.
     */
    @Test
    public void nodeSchemaAsList() throws Exception {
        final String json = getJson("/nn-to-json/choice/xml/data_list.xml");

        assertTrue(json.contains("cont"));
        assertTrue(json.contains("\"lst1b\":["));
        assertTrue(json.contains("{\"lf11b\":\"lf11b_1 val\"}"));
        assertTrue(json.contains("{\"lf11b\":\"lf11b_2 val\"}"));
    }

    /**
     * Test when element in case is container.
     */
    @Test
    public void nodeSchemaAsContainer() throws Exception {
        final String json = getJson("/nn-to-json/choice/xml/data_container.xml");

        assertTrue(json.contains("cont"));
        assertTrue(json.contains("\"cont1c\":{"));
        assertTrue(json.contains("\"lf11c\":\"lf11c val\""));
    }

    /**
     * Test when element in case is leaflist.
     */
    @Test
    public void nodeSchemaAsLeafList() throws Exception {
        final String json = getJson("/nn-to-json/choice/xml/data_leaflist.xml");

        assertTrue(json.contains("cont"));
        assertTrue(json.contains("\"lflst1d\":["));
        assertTrue(json.contains("\"lflst1d_1 val\""));
        assertTrue(json.contains("\"lflst1d_2 val\""));
    }

    @Test
    public void nodeSchemasInMultipleChoicesTest() throws Exception {
        final String json = getJson("/nn-to-json/choice/xml/data_more_choices_same_level.xml");

        assertTrue(json.contains("cont"));
        assertTrue(json.contains("\"lf2b\":\"lf2b value\""));
        assertTrue(json.contains("\"cont1c\":{"));
        assertTrue(json.contains("\"lf11c\":\"lf11c val\""));
    }

    /**
     * Test whether is possible to find data schema for node which is specified
     * as dirrect subnode of choice (case without CASE key word).
     */
    @Test
    public void nodeSchemasInCaseNotDefinedWithCaseKeyword() throws Exception {
        final String json = getJson("/nn-to-json/choice/xml/data_case_defined_without_case.xml");

        assertTrue(json.contains("cont"));
        assertTrue(json.contains("\"lf2b\":\"lf2b val\""));
        assertTrue(json.contains("\"e1\":45"));
    }

    /**
     * Test of multiple use of choices.
     */
    @Test
    public void nodeSchemasInThreeChoicesAtSameLevel() throws Exception {
        final String json = getJson("/nn-to-json/choice/xml/data_three_choices_same_level.xml");

        assertTrue(json.contains("cont"));
        assertTrue(json.contains("lf2b\":\"lf2b value"));
        assertTrue(json.contains("lst4a\":[{"));
        assertTrue(json.contains("{\"lf4ab\":33}"));
        assertTrue(json.contains("{\"lf4ab\":37}"));
        assertTrue(json.contains("\"lf1aaa\":\"lf1aaa value\""));
    }

    private String getJson(final String xmlPath) throws Exception {
        final String uri = "choice-case-test:cont";
        final NormalizedNodeContext testNN = TestRestconfUtils
                .loadNormalizedContextFromXmlFile(xmlPath, uri, controllerContext);

        final OutputStream output = new ByteArrayOutputStream();
        jsonBodyWriter.writeTo(testNN, null, null, null, mediaType, null,
                output);

        return output.toString();
    }

    @Override
    protected MediaType getMediaType() {
        return null;
    }
}