/*
 * 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.controller.sal.restconf.impl.test;

import java.io.FileNotFoundException;
import java.time.Instant;
import java.util.AbstractMap.SimpleImmutableEntry;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map.Entry;
import java.util.Set;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.core.UriInfo;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;
import org.opendaylight.controller.md.sal.dom.api.DOMDataBroker;
import org.opendaylight.controller.md.sal.rest.common.TestRestconfUtils;
import org.opendaylight.netconf.sal.restconf.impl.BrokerFacade;
import org.opendaylight.netconf.sal.restconf.impl.ControllerContext;
import org.opendaylight.netconf.sal.restconf.impl.RestconfImpl;
import org.opendaylight.netconf.sal.streams.listeners.ListenerAdapter;
import org.opendaylight.netconf.sal.streams.listeners.Notificator;
import org.opendaylight.restconf.common.errors.RestconfDocumentedException;
import org.opendaylight.yang.gen.v1.urn.sal.restconf.event.subscription.rev140708.NotificationOutputTypeGrouping.NotificationOutputType;
import org.opendaylight.yangtools.yang.common.QName;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
import org.opendaylight.yangtools.yang.model.api.SchemaContext;
import org.opendaylight.yangtools.yang.test.util.YangParserTestUtils;

public class RestconfImplNotificationSubscribingTest {

    private final String identifier = "data-change-event-subscription/datastore=OPERATIONAL/scope=ONE";

    private static SchemaContext schemaContext;

    @Mock
    private BrokerFacade broker;

    @Mock
    private DOMDataBroker domDataBroker;

    @Mock
    private UriInfo uriInfo;

    private ControllerContext controllerContext;

    @BeforeClass
    public static void init() throws FileNotFoundException {
        schemaContext = YangParserTestUtils.parseYangFiles(TestRestconfUtils.loadFiles("/notifications"));
    }

    @Before
    public void setup() throws Exception {
        MockitoAnnotations.initMocks(this);

        RestconfImpl.getInstance().setBroker(this.broker);

        controllerContext = TestRestconfUtils.newControllerContext(schemaContext);
        RestconfImpl.getInstance().setControllerContext(controllerContext);

        final YangInstanceIdentifier path = Mockito.mock(YangInstanceIdentifier.class);
        final PathArgument pathValue = NodeIdentifier.create(QName.create("module", "2016-12-14", "localName"));
        Mockito.when(path.getLastPathArgument()).thenReturn(pathValue);
        Notificator.createListener(path, this.identifier, NotificationOutputType.XML, controllerContext);
    }

    @Test
    public void startTimeTest() {
        final List<Entry<String, List<String>>> list = new ArrayList<>();
        final List<String> time = new ArrayList<>();
        time.add("2014-10-25T10:02:00Z");
        final Entry<String, List<String>> entry = new SimpleImmutableEntry<>("start-time", time);
        list.add(entry);

        subscribe(list);
        Notificator.removeAllListeners();
    }

    @Test
    public void milisecsTest() {
        final List<Entry<String, List<String>>> list = new ArrayList<>();
        final List<String> time = new ArrayList<>();
        time.add("2014-10-25T10:02:00.12345Z");
        final Entry<String, List<String>> entry = new SimpleImmutableEntry<>("start-time", time);
        list.add(entry);

        subscribe(list);
        Notificator.removeAllListeners();
    }

    @Test
    public void zonesPlusTest() {
        final List<Entry<String, List<String>>> list = new ArrayList<>();
        final List<String> time = new ArrayList<>();
        time.add("2014-10-25T10:02:00+01:00");
        final Entry<String, List<String>> entry = new SimpleImmutableEntry<>("start-time", time);
        list.add(entry);

        subscribe(list);
        Notificator.removeAllListeners();
    }

    @Test
    public void zonesMinusTest() {
        final List<Entry<String, List<String>>> list = new ArrayList<>();
        final List<String> time = new ArrayList<>();
        time.add("2014-10-25T10:02:00-01:00");
        final Entry<String, List<String>> entry = new SimpleImmutableEntry<>("start-time", time);
        list.add(entry);

        subscribe(list);
        Notificator.removeAllListeners();
    }

    @Test
    public void startAndStopTimeTest() {
        final List<Entry<String, List<String>>> list = new ArrayList<>();
        final List<String> time = new ArrayList<>();
        time.add("2014-10-25T10:02:00Z");
        final Entry<String, List<String>> entry = new SimpleImmutableEntry<>("start-time", time);

        final List<String> time2 = new ArrayList<>();
        time2.add("2014-10-25T12:31:00Z");
        final Entry<String, List<String>> entry2 = new SimpleImmutableEntry<>("stop-time", time2);

        list.add(entry);
        list.add(entry2);

        subscribe(list);
        Notificator.removeAllListeners();
    }

    @Test(expected = RestconfDocumentedException.class)
    public void stopTimeTest() {
        final List<Entry<String, List<String>>> list = new ArrayList<>();
        final List<String> time = new ArrayList<>();
        time.add("2014-10-25T12:31:00Z");
        final Entry<String, List<String>> entry = new SimpleImmutableEntry<>("stop-time", time);
        list.add(entry);

        subscribe(list);
        Notificator.removeAllListeners();
    }

    @Test(expected = RestconfDocumentedException.class)
    public void badParamTest() {
        final List<Entry<String, List<String>>> list = new ArrayList<>();
        final List<String> time = new ArrayList<>();
        time.add("2014-10-25T12:31:00Z");
        final Entry<String, List<String>> entry = new SimpleImmutableEntry<>("time", time);
        list.add(entry);

        subscribe(list);
        Notificator.removeAllListeners();
    }

    @Test(expected = IllegalArgumentException.class)
    public void badValueTest() {
        final List<Entry<String, List<String>>> list = new ArrayList<>();
        final List<String> time = new ArrayList<>();
        time.add("badvalue");
        final Entry<String, List<String>> entry = new SimpleImmutableEntry<>("start-time", time);
        list.add(entry);

        subscribe(list);
        Notificator.removeAllListeners();
    }

    @Test(expected = IllegalArgumentException.class)
    public void badZonesTest() {
        final List<Entry<String, List<String>>> list = new ArrayList<>();
        final List<String> time = new ArrayList<>();
        time.add("2014-10-25T10:02:00Z+1:00");
        final Entry<String, List<String>> entry = new SimpleImmutableEntry<>("start-time", time);
        list.add(entry);

        subscribe(list);
        Notificator.removeAllListeners();
    }

    @Test(expected = IllegalArgumentException.class)
    public void badMilisecsTest() {
        final List<Entry<String, List<String>>> list = new ArrayList<>();
        final List<String> time = new ArrayList<>();
        time.add("2014-10-25T10:02:00:0026Z");
        final Entry<String, List<String>> entry = new SimpleImmutableEntry<>("start-time", time);
        list.add(entry);

        subscribe(list);
        Notificator.removeAllListeners();
    }

    @Test
    public void onNotifiTest() throws Exception {
        final YangInstanceIdentifier path = Mockito.mock(YangInstanceIdentifier.class);
        final PathArgument pathValue = NodeIdentifier.create(QName.create("module", "2016-12-14", "localName"));
        Mockito.when(path.getLastPathArgument()).thenReturn(pathValue);
        final ListenerAdapter listener = Notificator.createListener(path, this.identifier, NotificationOutputType.XML,
                controllerContext);

        final List<Entry<String, List<String>>> list = new ArrayList<>();
        final List<String> time = new ArrayList<>();
        time.add("2014-10-25T10:02:00Z");
        final Entry<String, List<String>> entry = new SimpleImmutableEntry<>("start-time", time);
        list.add(entry);

        subscribe(list);

        ArrayList<DataTreeCandidate> candidates = new ArrayList<>(0);
        Instant startOrig = listener.getStart();
        Assert.assertNotNull(startOrig);
        listener.onDataTreeChanged(candidates);

        startOrig = listener.getStart();
        Assert.assertNull(startOrig);
    }

    private void subscribe(final List<Entry<String, List<String>>> entries) {
        final MultivaluedMap<String, String> map = Mockito.mock(MultivaluedMap.class);
        Mockito.when(this.uriInfo.getQueryParameters()).thenReturn(map);
        final UriBuilder uriBuilder = UriBuilder.fromPath("http://localhost:8181/" + this.identifier);
        Mockito.when(this.uriInfo.getAbsolutePathBuilder()).thenReturn(uriBuilder);
        final Set<Entry<String, List<String>>> set = new HashSet<>();
        for (final Entry<String, List<String>> entry : entries) {
            set.add(entry);
        }
        Mockito.when(map.entrySet()).thenReturn(set);
        RestconfImpl.getInstance().subscribeToStream(this.identifier, this.uriInfo);
    }

}