/*
 * Copyright (c) 2016 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.restconf.nb.rfc8040.jersey.providers.test;

import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;

import com.google.common.collect.Sets;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.Collection;
import java.util.Optional;
import javax.ws.rs.core.MediaType;
import org.junit.BeforeClass;
import org.junit.Test;
import org.opendaylight.restconf.nb.rfc8040.TestRestconfUtils;
import org.opendaylight.restconf.nb.rfc8040.jersey.providers.JsonNormalizedNodeBodyReader;
import org.opendaylight.restconf.nb.rfc8040.legacy.NormalizedNodePayload;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.common.QNameModule;
import org.opendaylight.yangtools.yang.common.Revision;
import org.opendaylight.yangtools.yang.common.XMLNamespace;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
import org.opendaylight.yangtools.yang.model.api.ActionDefinition;
import org.opendaylight.yangtools.yang.model.api.DataNodeContainer;
import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
import org.opendaylight.yangtools.yang.model.api.Module;
import org.opendaylight.yangtools.yang.test.util.YangParserTestUtils;

public class JsonBodyReaderTest extends AbstractBodyReaderTest {
    private static final QNameModule INSTANCE_IDENTIFIER_MODULE_QNAME = QNameModule.create(
        XMLNamespace.of("instance:identifier:module"), Revision.of("2014-01-17"));

    private static EffectiveModelContext schemaContext;

    private final JsonNormalizedNodeBodyReader jsonBodyReader;

    public JsonBodyReaderTest() throws Exception {
        super(schemaContext);
        jsonBodyReader = new JsonNormalizedNodeBodyReader(databindProvider, mountPointService);
    }

    @Override
    protected MediaType getMediaType() {
        return new MediaType(MediaType.APPLICATION_XML, null);
    }

    @BeforeClass
    public static void initialization() throws FileNotFoundException {
        final Collection<File> testFiles = TestRestconfUtils.loadFiles("/instanceidentifier/yang");
        testFiles.addAll(TestRestconfUtils.loadFiles("/modules"));
        schemaContext = YangParserTestUtils.parseYangFiles(testFiles);
    }

    @Test
    public void moduleDataTest() throws Exception {
        final DataSchemaNode dataSchemaNode = schemaContext
                .getDataChildByName(QName.create(INSTANCE_IDENTIFIER_MODULE_QNAME, "cont"));
        final YangInstanceIdentifier dataII = YangInstanceIdentifier.of(dataSchemaNode.getQName());
        final String uri = "instance-identifier-module:cont";
        mockBodyReader(uri, jsonBodyReader, false);
        final NormalizedNodePayload payload = jsonBodyReader.readFrom(null, null, null, mediaType, null,
            JsonBodyReaderTest.class.getResourceAsStream("/instanceidentifier/json/jsondata.json"));
        checkNormalizedNodePayload(payload);
        checkExpectValueNormalizeNodeContext(dataSchemaNode, payload, dataII);
    }

    @Test
    public void moduleSubContainerDataPutTest() throws Exception {
        final DataSchemaNode dataSchemaNode = schemaContext
                .getDataChildByName(QName.create(INSTANCE_IDENTIFIER_MODULE_QNAME, "cont"));
        final QName cont1QName = QName.create(dataSchemaNode.getQName(), "cont1");
        final YangInstanceIdentifier dataII = YangInstanceIdentifier.of(dataSchemaNode.getQName()).node(cont1QName);
        final DataSchemaNode dataSchemaNodeOnPath = ((DataNodeContainer) dataSchemaNode).getDataChildByName(cont1QName);
        final String uri = "instance-identifier-module:cont/cont1";
        mockBodyReader(uri, jsonBodyReader, false);
        final NormalizedNodePayload payload = jsonBodyReader.readFrom(null, null, null, mediaType, null,
            JsonBodyReaderTest.class.getResourceAsStream("/instanceidentifier/json/json_sub_container.json"));
        checkNormalizedNodePayload(payload);
        checkExpectValueNormalizeNodeContext(dataSchemaNodeOnPath, payload, dataII);
    }

    @Test
    public void moduleSubContainerDataPostTest() throws Exception {
        final DataSchemaNode dataSchemaNode = schemaContext
                .getDataChildByName(QName.create(INSTANCE_IDENTIFIER_MODULE_QNAME, "cont"));
        final QName cont1QName = QName.create(dataSchemaNode.getQName(), "cont1");
        final YangInstanceIdentifier dataII = YangInstanceIdentifier.of(dataSchemaNode.getQName()).node(cont1QName);
        final String uri = "instance-identifier-module:cont";
        mockBodyReader(uri, jsonBodyReader, true);
        final NormalizedNodePayload payload = jsonBodyReader.readFrom(null, null, null, mediaType, null,
            JsonBodyReaderTest.class.getResourceAsStream("/instanceidentifier/json/json_sub_container.json"));
        checkNormalizedNodePayload(payload);
        checkExpectValueNormalizeNodeContext(dataSchemaNode, payload, dataII);
    }

    @Test
    public void moduleSubContainerDataPostActionTest() throws Exception {
        final Optional<DataSchemaNode> dataSchemaNode = schemaContext
            .findDataChildByName(QName.create(INSTANCE_IDENTIFIER_MODULE_QNAME, "cont"));
        final QName cont1QName = QName.create(dataSchemaNode.get().getQName(), "cont1");
        final QName actionQName = QName.create(dataSchemaNode.get().getQName(), "reset");
        final YangInstanceIdentifier dataII = YangInstanceIdentifier.of(dataSchemaNode.get().getQName())
            .node(cont1QName).node(actionQName);
        final String uri = "instance-identifier-module:cont/cont1/reset";
        mockBodyReader(uri, jsonBodyReader, true);
        final NormalizedNodePayload payload = jsonBodyReader.readFrom(null, null, null, mediaType, null,
            JsonBodyReaderTest.class.getResourceAsStream("/instanceidentifier/json/json_cont_action.json"));
        checkNormalizedNodePayload(payload);
        assertThat(payload.getInstanceIdentifierContext().getSchemaNode(), instanceOf(ActionDefinition.class));
    }

    @Test
    public void moduleSubContainerAugmentDataPostTest() throws Exception {
        final DataSchemaNode dataSchemaNode = schemaContext
                .getDataChildByName(QName.create(INSTANCE_IDENTIFIER_MODULE_QNAME, "cont"));
        final Module augmentModule = schemaContext.findModules(XMLNamespace.of("augment:module")).iterator().next();
        final QName contAugmentQName = QName.create(augmentModule.getQNameModule(), "cont-augment");
        final YangInstanceIdentifier.AugmentationIdentifier augII = new YangInstanceIdentifier.AugmentationIdentifier(
                Sets.newHashSet(contAugmentQName));
        final YangInstanceIdentifier dataII = YangInstanceIdentifier.of(dataSchemaNode.getQName()).node(augII)
                .node(contAugmentQName);
        final String uri = "instance-identifier-module:cont";
        mockBodyReader(uri, jsonBodyReader, true);
        final NormalizedNodePayload payload = jsonBodyReader.readFrom(null, null, null, mediaType, null,
            XmlBodyReaderTest.class.getResourceAsStream("/instanceidentifier/json/json_augment_container.json"));
        checkNormalizedNodePayload(payload);
        checkExpectValueNormalizeNodeContext(dataSchemaNode, payload, dataII);
    }

    @Test
    public void moduleSubContainerChoiceAugmentDataPostTest() throws Exception {
        final DataSchemaNode dataSchemaNode = schemaContext
                .getDataChildByName(QName.create(INSTANCE_IDENTIFIER_MODULE_QNAME, "cont"));
        final Module augmentModule = schemaContext.findModules(XMLNamespace.of("augment:module")).iterator().next();
        final QName augmentChoice1QName = QName.create(augmentModule.getQNameModule(), "augment-choice1");
        final QName augmentChoice2QName = QName.create(augmentChoice1QName, "augment-choice2");
        final QName containerQName = QName.create(augmentChoice1QName, "case-choice-case-container1");
        final YangInstanceIdentifier.AugmentationIdentifier augChoice1II =
                new YangInstanceIdentifier.AugmentationIdentifier(Sets.newHashSet(augmentChoice1QName));
        final YangInstanceIdentifier.AugmentationIdentifier augChoice2II =
                new YangInstanceIdentifier.AugmentationIdentifier(Sets.newHashSet(augmentChoice2QName));
        final YangInstanceIdentifier dataII = YangInstanceIdentifier.of(dataSchemaNode.getQName()).node(augChoice1II)
                .node(augmentChoice1QName).node(augChoice2II).node(augmentChoice2QName).node(containerQName);
        final String uri = "instance-identifier-module:cont";
        mockBodyReader(uri, jsonBodyReader, true);
        final NormalizedNodePayload payload = jsonBodyReader.readFrom(null, null, null, mediaType, null,
            XmlBodyReaderTest.class.getResourceAsStream("/instanceidentifier/json/json_augment_choice_container.json"));
        checkNormalizedNodePayload(payload);
        checkExpectValueNormalizeNodeContext(dataSchemaNode, payload, dataII);
    }

    @Test
    public void testRangeViolation() throws Exception {
        mockBodyReader("netconf786:foo", jsonBodyReader, false);

        final InputStream inputStream = new ByteArrayInputStream(("{\n"
            + "  \"netconf786:foo\": {\n"
            + "    \"bar\": 100\n"
            + "  }\n"
            + "}").getBytes(StandardCharsets.UTF_8));

        assertRangeViolation(() -> jsonBodyReader.readFrom(null, null, null, mediaType, null, inputStream));
    }

    private static void checkExpectValueNormalizeNodeContext(final DataSchemaNode dataSchemaNode,
            final NormalizedNodePayload nnContext, final YangInstanceIdentifier dataNodeIdent) {
        assertEquals(dataSchemaNode, nnContext.getInstanceIdentifierContext().getSchemaNode());
        assertEquals(dataNodeIdent, nnContext.getInstanceIdentifierContext().getInstanceIdentifier());
        assertNotNull(NormalizedNodes.findNode(nnContext.getData(), dataNodeIdent));
    }
}