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

import org.elasticsearch.action.admin.indices.template.put.PutIndexTemplateRequest;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.logging.DeprecationLogger;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.AcknowledgedRestListener;

import java.io.IOException;
import java.util.Arrays;
import java.util.Collections;

public class RestPutIndexTemplateAction extends BaseRestHandler {

    private static final DeprecationLogger DEPRECATION_LOGGER = new DeprecationLogger(Loggers.getLogger(RestPutIndexTemplateAction.class));

    public RestPutIndexTemplateAction(Settings settings, RestController controller) {
        super(settings);
        controller.registerHandler(RestRequest.Method.PUT, "/_template/{name}", this);
        controller.registerHandler(RestRequest.Method.POST, "/_template/{name}", this);
    }

    @Override
    public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
        PutIndexTemplateRequest putRequest = new PutIndexTemplateRequest(request.param("name"));
        if (request.hasParam("template")) {
            DEPRECATION_LOGGER.deprecated("Deprecated parameter[template] used, replaced by [index_patterns]");
            putRequest.patterns(Collections.singletonList(request.param("template")));
        } else {
            putRequest.patterns(Arrays.asList(request.paramAsStringArray("index_patterns", Strings.EMPTY_ARRAY)));
        }
        putRequest.order(request.paramAsInt("order", putRequest.order()));
        putRequest.masterNodeTimeout(request.paramAsTime("master_timeout", putRequest.masterNodeTimeout()));
        putRequest.create(request.paramAsBoolean("create", false));
        putRequest.cause(request.param("cause", ""));
        putRequest.source(request.content(), request.getXContentType());
        return channel -> client.admin().indices().putTemplate(putRequest, new AcknowledgedRestListener<>(channel));
    }

}
