/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package apoc.agg;

import static apoc.util.TestUtil.testCall;
import static apoc.util.Util.map;
import static org.junit.jupiter.api.Assertions.assertEquals;

import apoc.util.TestUtil;
import com.neo4j.test.extension.ImpermanentEnterpriseDbmsExtension;
import java.util.Map;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.test.extension.Inject;

@ImpermanentEnterpriseDbmsExtension()
public class StatisticsTest {
    @Inject
    GraphDatabaseService db;

    @BeforeAll
    public void setUp() {
        TestUtil.registerProcedure(db, Statistics.class);
    }

    @Test
    public void testStatistics() {
        testCall(db, "UNWIND [] as value RETURN apoc.agg.statistics(value) as p", (row) -> {
            assertEquals(
                    map(
                            "min",
                            null,
                            "max",
                            null,
                            "minNonZero",
                            Long.valueOf(Long.MAX_VALUE).doubleValue(),
                            "total",
                            0L,
                            "stdev",
                            0D,
                            "mean",
                            0D),
                    row.get("p"));
        });
        testCall(db, "UNWIND [0,1,1,2,2,2,3] as value RETURN apoc.agg.statistics(value,[0.5,0.95]) as p", (row) -> {
            assertEquals(
                    map(
                            "total",
                            7L,
                            "min",
                            0L,
                            "minNonZero",
                            1D,
                            "max",
                            3L,
                            "mean",
                            1.5714285714285714D,
                            "0.5",
                            2L,
                            "0.95",
                            3L,
                            "stdev",
                            0.9035079029052512),
                    row.get("p"));
        });
    }

    @Test
    public void testStatisticsDouble() {
        testCall(db, "UNWIND [0,1,1,2.0,2,2,3] as value RETURN apoc.agg.statistics(value,[0.5,0.95]) as p", (row) -> {
            assertEquals(
                    map(
                            "total",
                            7L,
                            "min",
                            0L,
                            "minNonZero",
                            1D,
                            "max",
                            3L,
                            "mean",
                            1.5714329310825892D,
                            "0.5",
                            2.0000076293945312D,
                            "0.95",
                            3.0000076293945312D,
                            "stdev",
                            0.9035111771858774),
                    row.get("p"));
        });
    }

    @Test
    public void testStatisticsDoubleMinMax() {
        testCall(db, "UNWIND [0.123,0.234] as value RETURN apoc.agg.statistics(value,[0.05,0.5,0.95]) as p", (row) -> {
            Map<String, Number> stats = (Map<String, Number>) row.get("p");
            assertEquals(0.234D, stats.get("max"));
            assertEquals(0.123D, stats.get("min"));
        });
    }
}
