/*
 * 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.rest.action.admin.indices;

import org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.client.internal.node.NodeClient;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.xcontent.XContentHelper;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.Scope;
import org.elasticsearch.rest.ServerlessScope;
import org.elasticsearch.rest.action.RestToXContentListener;

import java.io.IOException;
import java.util.List;
import java.util.Map;

import static org.elasticsearch.index.mapper.MapperService.SINGLE_MAPPING_NAME;
import static org.elasticsearch.index.mapper.MapperService.isMappingSourceTyped;
import static org.elasticsearch.rest.RestRequest.Method.POST;
import static org.elasticsearch.rest.RestRequest.Method.PUT;
import static org.elasticsearch.rest.RestUtils.getAckTimeout;
import static org.elasticsearch.rest.RestUtils.getMasterNodeTimeout;

@ServerlessScope(Scope.PUBLIC)
public class RestPutMappingAction extends BaseRestHandler {

    @Override
    public List<Route> routes() {
        return List.of(
            new Route(POST, "/{index}/_mapping/"),
            new Route(PUT, "/{index}/_mapping/"),
            new Route(POST, "/{index}/_mappings/"),
            new Route(PUT, "/{index}/_mappings/")
        );
    }

    @Override
    public String getName() {
        return "put_mapping_action";
    }

    @Override
    public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
        String[] indices = Strings.splitStringByCommaToArray(request.param("index"));
        PutMappingRequest putMappingRequest = new PutMappingRequest(indices);

        Map<String, Object> sourceAsMap = XContentHelper.convertToMap(request.requiredContent(), false, request.getXContentType()).v2();
        if (isMappingSourceTyped(SINGLE_MAPPING_NAME, sourceAsMap)) {
            throw new IllegalArgumentException("Types cannot be provided in put mapping requests");
        }
        putMappingRequest.source(sourceAsMap);
        putMappingRequest.ackTimeout(getAckTimeout(request));
        putMappingRequest.masterNodeTimeout(getMasterNodeTimeout(request));
        putMappingRequest.indicesOptions(IndicesOptions.fromRequest(request, putMappingRequest.indicesOptions()));
        putMappingRequest.writeIndexOnly(request.paramAsBoolean("write_index_only", false));
        return channel -> client.admin().indices().putMapping(putMappingRequest, new RestToXContentListener<>(channel));
    }

    private static Map<String, Object> prepareV7Mappings(boolean includeTypeName, Map<String, Object> mappings) {
        if (includeTypeName && mappings != null && mappings.size() == 1) {
            String typeName = mappings.keySet().iterator().next();
            if (Strings.hasText(typeName) == false) {
                throw new IllegalArgumentException("name cannot be empty string");
            }
            @SuppressWarnings("unchecked")
            Map<String, Object> typelessMappings = (Map<String, Object>) mappings.get(typeName);
            return typelessMappings;
        }
        return mappings;
    }

}