/**
 * Copyright (C) 2012-2017 52°North Initiative for Geospatial Open Source
 * Software GmbH
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 *
 * If the program is linked with libraries which are licensed under one of
 * the following licenses, the combination of the program with the linked
 * library is not considered a "derivative work" of the program:
 *
 *     - Apache License, version 2.0
 *     - Apache Software License, version 1.0
 *     - GNU Lesser General Public License, version 3
 *     - Mozilla Public License, versions 1.0, 1.1 and 2.0
 *     - Common Development and Distribution License (CDDL), version 1.0
 *
 * Therefore the distribution of the program linked with libraries licensed
 * under the aforementioned licenses, is permitted by the copyright holders
 * if the distribution is compliant with both the GNU General Public
 * License version 2 and the aforementioned licenses.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
 * Public License for more details.
 */
package org.n52.sos.decode.json.impl;

import static com.github.fge.jackson.JsonLoader.fromResource;
import static org.hamcrest.Matchers.equalTo;
import static org.hamcrest.Matchers.instanceOf;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.notNullValue;
import static org.hamcrest.Matchers.nullValue;
import static org.junit.Assert.assertThat;
import static org.n52.sos.util.DateTimeHelper.parseIsoString2DateTime;

import org.joda.time.DateTime;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.ClassRule;
import org.junit.Test;
import org.n52.sos.ConfiguredSettingsManager;
import org.n52.sos.ogc.gml.time.TimeInstant;
import org.n52.sos.ogc.om.ObservationValue;
import org.n52.sos.ogc.om.OmConstants;
import org.n52.sos.ogc.om.OmObservation;
import org.n52.sos.ogc.om.SingleObservationValue;
import org.n52.sos.ogc.om.values.CountValue;
import org.n52.sos.ogc.ows.OwsExceptionReport;

import com.fasterxml.jackson.databind.JsonNode;

/**
 * TODO JavaDoc
 * 
 * @author Christian Autermann <c.autermann@52north.org>
 * 
 * @since 4.0.0
 */
public class CountObservationDecodingTest {
    @ClassRule
    public static final ConfiguredSettingsManager csm = new ConfiguredSettingsManager();

    private static DateTime phenomenonTime;

    private static JsonNode json;

    private ObservationDecoder decoder;

    private OmObservation observation;

    @BeforeClass
    public static void beforeClass() {
        try {
            json = fromResource("/examples/count-observation.json");
            phenomenonTime = parseIsoString2DateTime("2013-01-01T00:00:00+02:00");
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }
    }

    @Before
    public void before() throws OwsExceptionReport {
        this.decoder = new ObservationDecoder();
        this.observation = decoder.decodeJSON(json, true);
    }

    @Test
    public void testObservation() {
        assertThat(observation, is(notNullValue()));
        final String type = observation.getObservationConstellation().getObservationType();
        assertThat(type, is(equalTo(OmConstants.OBS_TYPE_COUNT_OBSERVATION)));
        final ObservationValue<?> value = observation.getValue();
        assertThat(value, is(instanceOf(SingleObservationValue.class)));
        assertThat(value.getPhenomenonTime(), is(instanceOf(TimeInstant.class)));
        TimeInstant pt = (TimeInstant) value.getPhenomenonTime();
        assertThat(pt.getValue(), is(equalTo(phenomenonTime)));
        assertThat(value.getValue(), is(instanceOf(CountValue.class)));
        CountValue v = (CountValue) value.getValue();
        assertThat(v.getValue(), is(1));
        assertThat(v.getUnit(), is(nullValue()));
    }
}