/*
 * Copyright (c) 2019 PANTHEON.tech, s.r.o. 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.yangtools.yang.model.util.ut;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.isA;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import com.google.common.collect.ImmutableList;
import org.junit.Before;
import org.junit.Test;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.model.api.ContainerSchemaNode;
import org.opendaylight.yangtools.yang.model.api.EffectiveModelContext;
import org.opendaylight.yangtools.yang.model.api.LeafSchemaNode;
import org.opendaylight.yangtools.yang.model.api.Module;
import org.opendaylight.yangtools.yang.model.api.PathExpression;
import org.opendaylight.yangtools.yang.model.api.PathExpression.LocationPathSteps;
import org.opendaylight.yangtools.yang.model.api.PathExpression.Steps;
import org.opendaylight.yangtools.yang.model.api.SchemaNode;
import org.opendaylight.yangtools.yang.model.api.SchemaPath;
import org.opendaylight.yangtools.yang.model.api.type.LeafrefTypeDefinition;
import org.opendaylight.yangtools.yang.test.util.YangParserTestUtils;
import org.opendaylight.yangtools.yang.xpath.api.YangLocationPath;
import org.opendaylight.yangtools.yang.xpath.api.YangLocationPath.ResolvedQNameStep;
import org.opendaylight.yangtools.yang.xpath.api.YangLocationPath.Step;

public class YT1060Test {
    private static final QName CONT = QName.create("parent", "cont");
    private static final QName LEAF1 = QName.create(CONT, "leaf1");

    private EffectiveModelContext context;
    private PathExpression path;

    @Before
    public void before() {
        context = YangParserTestUtils.parseYangResourceDirectory("/yt1060");

        final Module module = context.findModule(CONT.getModule()).get();
        final ContainerSchemaNode cont = (ContainerSchemaNode) module.findDataChildByName(CONT).get();
        final LeafSchemaNode leaf1 = (LeafSchemaNode) cont.findDataChildByName(LEAF1).get();
        path = ((LeafrefTypeDefinition) leaf1.getType()).getPathStatement();

        // Quick checks before we get to the point
        final Steps pathSteps = path.getSteps();
        assertThat(pathSteps, isA(LocationPathSteps.class));
        final YangLocationPath locationPath = ((LocationPathSteps) pathSteps).getLocationPath();
        assertTrue(locationPath.isAbsolute());
        final ImmutableList<Step> steps = locationPath.getSteps();
        assertEquals(2, steps.size());
        steps.forEach(step -> assertThat(step, isA(ResolvedQNameStep.class)));
    }

    @Test
    public void testFindDataSchemaNode() {
        final SchemaNode found = SchemaContextUtil.findDataTreeSchemaNode(context, CONT.getModule(), path);
        assertThat(found, isA(LeafSchemaNode.class));
        assertEquals(SchemaPath.create(true, QName.create("imported", "root"), QName.create("imported", "leaf1")),
            found.getPath());
    }
}