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 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.client.ml.job.config;

import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.test.AbstractXContentTestCase;

import java.util.ArrayList;
import java.util.Collections;
import java.util.EnumSet;
import java.util.List;

public class DetectorTests extends AbstractXContentTestCase<Detector> {

    public void testEquals_GivenEqual() {
        Detector.Builder builder = new Detector.Builder("mean", "field");
        builder.setByFieldName("by_field");
        builder.setOverFieldName("over_field");
        builder.setPartitionFieldName("partition");
        builder.setUseNull(false);
        Detector detector1 = builder.build();

        builder = new Detector.Builder("mean", "field");
        builder.setByFieldName("by_field");
        builder.setOverFieldName("over_field");
        builder.setPartitionFieldName("partition");
        builder.setUseNull(false);
        Detector detector2 = builder.build();

        assertTrue(detector1.equals(detector2));
        assertTrue(detector2.equals(detector1));
        assertEquals(detector1.hashCode(), detector2.hashCode());
    }

    public void testEquals_GivenDifferentDetectorDescription() {
        Detector detector1 = createDetector().build();
        Detector.Builder builder = createDetector();
        builder.setDetectorDescription("bar");
        Detector detector2 = builder.build();

        assertFalse(detector1.equals(detector2));
    }

    public void testEquals_GivenDifferentByFieldName() {
        Detector detector1 = createDetector().build();
        Detector detector2 = createDetector().build();

        assertEquals(detector1, detector2);

        Detector.Builder builder = new Detector.Builder(detector2);
        builder.setByFieldName("by2");
        detector2 = builder.build();
        assertFalse(detector1.equals(detector2));
    }

    private Detector.Builder createDetector() {
        Detector.Builder detector = new Detector.Builder("mean", "field");
        detector.setByFieldName("by_field");
        detector.setOverFieldName("over_field");
        detector.setPartitionFieldName("partition");
        detector.setUseNull(true);
        DetectionRule rule = new DetectionRule.Builder(RuleScope.builder().exclude("partition", "partition_filter"))
                .setActions(RuleAction.SKIP_RESULT)
                .build();
        detector.setRules(Collections.singletonList(rule));
        return detector;
    }

    @Override
    protected Detector createTestInstance() {
        DetectorFunction function = randomFrom(EnumSet.allOf(DetectorFunction.class));
        Detector.Builder detector = new Detector.Builder(function, randomBoolean() ? null : randomAlphaOfLengthBetween(1, 20));
        if (randomBoolean()) {
            detector.setDetectorDescription(randomAlphaOfLengthBetween(1, 20));
        }
        if (randomBoolean()) {
            detector.setPartitionFieldName(randomAlphaOfLengthBetween(6, 20));
        } else if (randomBoolean()) {
            detector.setOverFieldName(randomAlphaOfLengthBetween(6, 20));
        } else if (randomBoolean()) {
            detector.setByFieldName(randomAlphaOfLengthBetween(6, 20));
        }
        if (randomBoolean()) {
            detector.setExcludeFrequent(randomFrom(Detector.ExcludeFrequent.values()));
        }
        if (randomBoolean()) {
            int size = randomInt(10);
            List<DetectionRule> rules = new ArrayList<>(size);
            for (int i = 0; i < size; i++) {
                // no need for random DetectionRule (it is already tested)
                rules.add(new DetectionRule.Builder(Collections.singletonList(RuleConditionTests.createRandom())).build());
            }
            detector.setRules(rules);
        }
        if (randomBoolean()) {
            detector.setUseNull(randomBoolean());
        }
        return detector.build();
    }

    @Override
    protected Detector doParseInstance(XContentParser parser) {
        return Detector.PARSER.apply(parser, null).build();
    }

    public void testExcludeFrequentForString() {
        assertEquals(Detector.ExcludeFrequent.ALL, Detector.ExcludeFrequent.forString("all"));
        assertEquals(Detector.ExcludeFrequent.ALL, Detector.ExcludeFrequent.forString("ALL"));
        assertEquals(Detector.ExcludeFrequent.NONE, Detector.ExcludeFrequent.forString("none"));
        assertEquals(Detector.ExcludeFrequent.NONE, Detector.ExcludeFrequent.forString("NONE"));
        assertEquals(Detector.ExcludeFrequent.BY, Detector.ExcludeFrequent.forString("by"));
        assertEquals(Detector.ExcludeFrequent.BY, Detector.ExcludeFrequent.forString("BY"));
        assertEquals(Detector.ExcludeFrequent.OVER, Detector.ExcludeFrequent.forString("over"));
        assertEquals(Detector.ExcludeFrequent.OVER, Detector.ExcludeFrequent.forString("OVER"));
    }

    @Override
    protected boolean supportsUnknownFields() {
        return true;
    }
}
