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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
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 */

package org.elasticsearch.index.query;

import org.apache.lucene.search.Query;
import org.apache.lucene.search.spans.FieldMaskingSpanQuery;
import org.elasticsearch.index.mapper.MappedFieldType;
import org.elasticsearch.search.internal.SearchContext;
import org.elasticsearch.test.AbstractQueryTestCase;

import java.io.IOException;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.CoreMatchers.instanceOf;

public class FieldMaskingSpanQueryBuilderTests extends AbstractQueryTestCase<FieldMaskingSpanQueryBuilder> {
    @Override
    protected FieldMaskingSpanQueryBuilder doCreateTestQueryBuilder() {
        String fieldName;
        if (randomBoolean()) {
            fieldName = randomFrom(MAPPED_FIELD_NAMES);
        } else {
            fieldName = randomAlphaOfLengthBetween(1, 10);
        }
        SpanTermQueryBuilder innerQuery = new SpanTermQueryBuilderTests().createTestQueryBuilder();
        return new FieldMaskingSpanQueryBuilder(innerQuery, fieldName);
    }

    @Override
    protected void doAssertLuceneQuery(FieldMaskingSpanQueryBuilder queryBuilder, Query query, SearchContext context) throws IOException {
        String fieldInQuery = queryBuilder.fieldName();
        MappedFieldType fieldType = context.getQueryShardContext().fieldMapper(fieldInQuery);
        if (fieldType != null) {
            fieldInQuery = fieldType.name();
        }
        assertThat(query, instanceOf(FieldMaskingSpanQuery.class));
        FieldMaskingSpanQuery fieldMaskingSpanQuery = (FieldMaskingSpanQuery) query;
        assertThat(fieldMaskingSpanQuery.getField(), equalTo(fieldInQuery));
        assertThat(fieldMaskingSpanQuery.getMaskedQuery(), equalTo(queryBuilder.innerQuery().toQuery(context.getQueryShardContext())));
    }

    public void testIllegalArguments() {
        expectThrows(IllegalArgumentException.class, () -> new FieldMaskingSpanQueryBuilder(null, "maskedField"));
        SpanQueryBuilder span = new SpanTermQueryBuilder("name", "value");
        expectThrows(IllegalArgumentException.class, () -> new FieldMaskingSpanQueryBuilder(span, null));
        expectThrows(IllegalArgumentException.class, () -> new FieldMaskingSpanQueryBuilder(span, ""));
    }

    public void testFromJson() throws IOException {
        String json =
                "{\n" +
                "  \"field_masking_span\" : {\n" +
                "    \"query\" : {\n" +
                "      \"span_term\" : {\n" +
                "        \"value\" : {\n" +
                "          \"value\" : 0.5,\n" +
                "          \"boost\" : 0.23\n" +
                "        }\n" +
                "      }\n" +
                "    },\n" +
                "    \"field\" : \"mapped_geo_shape\",\n" +
                "    \"boost\" : 42.0,\n" +
                "    \"_name\" : \"KPI\"\n" +
                "  }\n" +
                "}";
        FieldMaskingSpanQueryBuilder parsed = (FieldMaskingSpanQueryBuilder) parseQuery(json);
        checkGeneratedJson(json, parsed);
        assertEquals(json, 42.0, parsed.boost(), 0.00001);
        assertEquals(json, 0.23, parsed.innerQuery().boost(), 0.00001);
    }
}