/*
 * Copyright OpenSearch Contributors
 * SPDX-License-Identifier: Apache-2.0
 */

package org.opensearch.securityanalytics.mapper.action.mapping;

import org.opensearch.cluster.metadata.MappingMetadata;
import org.opensearch.common.io.stream.BytesStreamOutput;
import org.opensearch.common.io.stream.StreamInput;
import org.opensearch.index.mapper.MapperService;
import org.opensearch.securityanalytics.action.GetIndexMappingsResponse;
import org.opensearch.test.OpenSearchTestCase;

import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;

public class GetIndexMappingsResponseTests extends OpenSearchTestCase {

    public void testStreamInOut() throws IOException {
        BytesStreamOutput out = new BytesStreamOutput();

        Map<String, MappingMetadata> mappings = new HashMap<>();
        mappings.put("my_index", createMappingsForIndex());

        GetIndexMappingsResponse response = new GetIndexMappingsResponse(mappings);
        response.writeTo(out);

        StreamInput sin = StreamInput.wrap(out.bytes().toBytesRef().bytes);
        GetIndexMappingsResponse newRes = new GetIndexMappingsResponse(sin);

        assertTrue(newRes.getMappings().containsKey("my_index"));
    }

    private static MappingMetadata createMappingsForIndex() {
        int typeCount = rarely() ? 0 : 1;
        MappingMetadata mmd = new MappingMetadata(MapperService.SINGLE_MAPPING_NAME, Collections.emptyMap());
        for (int i = 0; i < typeCount; i++) {
            if (rarely() == false) { // rarely have no fields
                Map<String, Object> mappings = new HashMap<>();
                mappings.put("field-" + i, randomFieldMapping());
                if (randomBoolean()) {
                    mappings.put("field2-" + i, randomFieldMapping());
                }

                String typeName = MapperService.SINGLE_MAPPING_NAME;
                mmd = new MappingMetadata(typeName, mappings);
            }
        }
        return mmd;
    }

    private static Map<String, Object> randomFieldMapping() {
        Map<String, Object> mappings = new HashMap<>();
        if (randomBoolean()) {
            mappings.put("type", randomBoolean() ? "text" : "keyword");
            mappings.put("index", "analyzed");
            mappings.put("analyzer", "english");
        } else if (randomBoolean()) {
            mappings.put("type", randomFrom("integer", "float", "long", "double"));
            mappings.put("index", Objects.toString(randomBoolean()));
        } else if (randomBoolean()) {
            mappings.put("type", "object");
            mappings.put("dynamic", "strict");
            Map<String, Object> properties = new HashMap<>();
            Map<String, Object> props1 = new HashMap<>();
            props1.put("type", randomFrom("text", "keyword"));
            props1.put("analyzer", "keyword");
            properties.put("subtext", props1);
            Map<String, Object> props2 = new HashMap<>();
            props2.put("type", "object");
            Map<String, Object> prop2properties = new HashMap<>();
            Map<String, Object> props3 = new HashMap<>();
            props3.put("type", "integer");
            props3.put("index", "false");
            prop2properties.put("subsubfield", props3);
            props2.put("properties", prop2properties);
            mappings.put("properties", properties);
        } else {
            mappings.put("type", "keyword");
        }
        return mappings;
    }
}