/*
 * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 * or more contributor license agreements. Licensed under the "Elastic License
 * 2.0", the "GNU Affero General Public License v3.0 only", and the "Server Side
 * Public License v 1"; you may not use this file except in compliance with, at
 * your election, the "Elastic License 2.0", the "GNU Affero General Public
 * License v3.0 only", or the "Server Side Public License, v 1".
 */
package org.elasticsearch.search.aggregations.bucket;

import org.elasticsearch.action.search.SearchPhaseExecutionException;
import org.elasticsearch.cluster.health.ClusterHealthStatus;
import org.elasticsearch.plugins.Plugin;
import org.elasticsearch.script.MockScriptPlugin;
import org.elasticsearch.script.Script;
import org.elasticsearch.script.ScriptType;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.bucket.range.Range;
import org.elasticsearch.test.ESIntegTestCase;

import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.function.Function;

import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertNoFailuresAndResponse;
import static org.hamcrest.Matchers.containsString;
import static org.hamcrest.Matchers.instanceOf;

@ESIntegTestCase.SuiteScopeTestCase
public class IpRangeIT extends ESIntegTestCase {

    public static class DummyScriptPlugin extends MockScriptPlugin {
        @Override
        public Map<String, Function<Map<String, Object>, Object>> pluginScripts() {
            return Collections.singletonMap("dummy", params -> null);
        }
    }

    @Override
    protected Collection<Class<? extends Plugin>> nodePlugins() {
        return Arrays.asList(DummyScriptPlugin.class);
    }

    @Override
    public void setupSuiteScopeCluster() throws Exception {
        assertAcked(prepareCreate("idx").setMapping("ip", "type=ip", "ips", "type=ip"));
        waitForRelocation(ClusterHealthStatus.GREEN);

        indexRandom(
            true,
            prepareIndex("idx").setId("1").setSource("ip", "192.168.1.7", "ips", Arrays.asList("192.168.0.13", "192.168.1.2")),
            prepareIndex("idx").setId("2").setSource("ip", "192.168.1.10", "ips", Arrays.asList("192.168.1.25", "192.168.1.28")),
            prepareIndex("idx").setId("3")
                .setSource("ip", "2001:db8::ff00:42:8329", "ips", Arrays.asList("2001:db8::ff00:42:8329", "2001:db8::ff00:42:8380"))
        );

        assertAcked(prepareCreate("idx_unmapped"));
        waitForRelocation(ClusterHealthStatus.GREEN);
        refresh();
    }

    public void testSingleValuedField() {
        assertNoFailuresAndResponse(
            prepareSearch("idx").addAggregation(
                AggregationBuilders.ipRange("my_range")
                    .field("ip")
                    .addUnboundedTo("192.168.1.0")
                    .addRange("192.168.1.0", "192.168.1.10")
                    .addUnboundedFrom("192.168.1.10")
            ),
            response -> {
                Range range = response.getAggregations().get("my_range");
                assertEquals(3, range.getBuckets().size());

                Range.Bucket bucket1 = range.getBuckets().get(0);
                assertNull(bucket1.getFrom());
                assertEquals("192.168.1.0", bucket1.getTo());
                assertEquals("*-192.168.1.0", bucket1.getKey());
                assertEquals(0, bucket1.getDocCount());

                Range.Bucket bucket2 = range.getBuckets().get(1);
                assertEquals("192.168.1.0", bucket2.getFrom());
                assertEquals("192.168.1.10", bucket2.getTo());
                assertEquals("192.168.1.0-192.168.1.10", bucket2.getKey());
                assertEquals(1, bucket2.getDocCount());

                Range.Bucket bucket3 = range.getBuckets().get(2);
                assertEquals("192.168.1.10", bucket3.getFrom());
                assertNull(bucket3.getTo());
                assertEquals("192.168.1.10-*", bucket3.getKey());
                assertEquals(2, bucket3.getDocCount());
            }
        );
    }

    public void testMultiValuedField() {
        assertNoFailuresAndResponse(
            prepareSearch("idx").addAggregation(
                AggregationBuilders.ipRange("my_range")
                    .field("ips")
                    .addUnboundedTo("192.168.1.0")
                    .addRange("192.168.1.0", "192.168.1.10")
                    .addUnboundedFrom("192.168.1.10")
            ),
            response -> {
                Range range = response.getAggregations().get("my_range");
                assertEquals(3, range.getBuckets().size());

                Range.Bucket bucket1 = range.getBuckets().get(0);
                assertNull(bucket1.getFrom());
                assertEquals("192.168.1.0", bucket1.getTo());
                assertEquals("*-192.168.1.0", bucket1.getKey());
                assertEquals(1, bucket1.getDocCount());

                Range.Bucket bucket2 = range.getBuckets().get(1);
                assertEquals("192.168.1.0", bucket2.getFrom());
                assertEquals("192.168.1.10", bucket2.getTo());
                assertEquals("192.168.1.0-192.168.1.10", bucket2.getKey());
                assertEquals(1, bucket2.getDocCount());

                Range.Bucket bucket3 = range.getBuckets().get(2);
                assertEquals("192.168.1.10", bucket3.getFrom());
                assertNull(bucket3.getTo());
                assertEquals("192.168.1.10-*", bucket3.getKey());
                assertEquals(2, bucket3.getDocCount());
            }
        );
    }

    public void testIpMask() {
        assertNoFailuresAndResponse(
            prepareSearch("idx").addAggregation(
                AggregationBuilders.ipRange("my_range")
                    .field("ips")
                    .addMaskRange("::/0")
                    .addMaskRange("0.0.0.0/0")
                    .addMaskRange("2001:db8::/64")
            ),
            response -> {
                Range range = response.getAggregations().get("my_range");
                assertEquals(3, range.getBuckets().size());

                Range.Bucket bucket1 = range.getBuckets().get(0);
                assertEquals("::/0", bucket1.getKey());
                assertEquals(3, bucket1.getDocCount());

                Range.Bucket bucket2 = range.getBuckets().get(1);
                assertEquals("0.0.0.0/0", bucket2.getKey());
                assertEquals(2, bucket2.getDocCount());

                Range.Bucket bucket3 = range.getBuckets().get(2);
                assertEquals("2001:db8::/64", bucket3.getKey());
                assertEquals(1, bucket3.getDocCount());
            }
        );
    }

    public void testPartiallyUnmapped() {
        assertNoFailuresAndResponse(
            prepareSearch("idx", "idx_unmapped").addAggregation(
                AggregationBuilders.ipRange("my_range")
                    .field("ip")
                    .addUnboundedTo("192.168.1.0")
                    .addRange("192.168.1.0", "192.168.1.10")
                    .addUnboundedFrom("192.168.1.10")
            ),
            response -> {
                Range range = response.getAggregations().get("my_range");
                assertEquals(3, range.getBuckets().size());

                Range.Bucket bucket1 = range.getBuckets().get(0);
                assertNull(bucket1.getFrom());
                assertEquals("192.168.1.0", bucket1.getTo());
                assertEquals("*-192.168.1.0", bucket1.getKey());
                assertEquals(0, bucket1.getDocCount());

                Range.Bucket bucket2 = range.getBuckets().get(1);
                assertEquals("192.168.1.0", bucket2.getFrom());
                assertEquals("192.168.1.10", bucket2.getTo());
                assertEquals("192.168.1.0-192.168.1.10", bucket2.getKey());
                assertEquals(1, bucket2.getDocCount());

                Range.Bucket bucket3 = range.getBuckets().get(2);
                assertEquals("192.168.1.10", bucket3.getFrom());
                assertNull(bucket3.getTo());
                assertEquals("192.168.1.10-*", bucket3.getKey());
                assertEquals(2, bucket3.getDocCount());
            }
        );
    }

    public void testUnmapped() {
        assertNoFailuresAndResponse(
            prepareSearch("idx_unmapped").addAggregation(
                AggregationBuilders.ipRange("my_range")
                    .field("ip")
                    .addUnboundedTo("192.168.1.0")
                    .addRange("192.168.1.0", "192.168.1.10")
                    .addUnboundedFrom("192.168.1.10")
            ),
            response -> {
                Range range = response.getAggregations().get("my_range");
                assertEquals(3, range.getBuckets().size());

                Range.Bucket bucket1 = range.getBuckets().get(0);
                assertNull(bucket1.getFrom());
                assertEquals("192.168.1.0", bucket1.getTo());
                assertEquals("*-192.168.1.0", bucket1.getKey());
                assertEquals(0, bucket1.getDocCount());

                Range.Bucket bucket2 = range.getBuckets().get(1);
                assertEquals("192.168.1.0", bucket2.getFrom());
                assertEquals("192.168.1.10", bucket2.getTo());
                assertEquals("192.168.1.0-192.168.1.10", bucket2.getKey());
                assertEquals(0, bucket2.getDocCount());

                Range.Bucket bucket3 = range.getBuckets().get(2);
                assertEquals("192.168.1.10", bucket3.getFrom());
                assertNull(bucket3.getTo());
                assertEquals("192.168.1.10-*", bucket3.getKey());
                assertEquals(0, bucket3.getDocCount());
            }
        );
    }

    public void testRejectsScript() {
        IllegalArgumentException e = expectThrows(
            IllegalArgumentException.class,
            () -> prepareSearch("idx").addAggregation(
                AggregationBuilders.ipRange("my_range").script(new Script(ScriptType.INLINE, "mockscript", "dummy", Collections.emptyMap()))
            ).get()
        );
        assertThat(e.getMessage(), containsString("[ip_range] does not support scripts"));
    }

    public void testRejectsValueScript() {
        IllegalArgumentException e = expectThrows(
            IllegalArgumentException.class,
            () -> prepareSearch("idx").addAggregation(
                AggregationBuilders.ipRange("my_range")
                    .field("ip")
                    .script(new Script(ScriptType.INLINE, "mockscript", "dummy", Collections.emptyMap()))
            ).get()
        );
        assertThat(e.getMessage(), containsString("[ip_range] does not support scripts"));
    }

    public void testNoRangesInQuery() {
        try {
            prepareSearch("idx").addAggregation(AggregationBuilders.ipRange("my_range").field("ip")).get();
            fail();
        } catch (SearchPhaseExecutionException spee) {
            Throwable rootCause = spee.getCause().getCause();
            assertThat(rootCause, instanceOf(IllegalArgumentException.class));
            assertEquals(rootCause.getMessage(), "No [ranges] specified for the [my_range] aggregation");
        }
    }
}