/*
 * Licensed to ElasticSearch and Shay Banon 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.settings;

import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.admin.indices.settings.UpdateSettingsRequest;
import org.elasticsearch.action.admin.indices.settings.UpdateSettingsResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.settings.SettingsException;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.rest.*;
import org.elasticsearch.rest.action.support.RestXContentBuilder;

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

import static org.elasticsearch.client.Requests.updateSettingsRequest;
import static org.elasticsearch.rest.RestStatus.BAD_REQUEST;
import static org.elasticsearch.rest.RestStatus.OK;
import static org.elasticsearch.rest.action.support.RestActions.splitIndices;

/**
 *
 */
public class RestUpdateSettingsAction extends BaseRestHandler {

    @Inject
    public RestUpdateSettingsAction(Settings settings, Client client, RestController controller) {
        super(settings, client);
        controller.registerHandler(RestRequest.Method.PUT, "/{index}/_settings", this);
        controller.registerHandler(RestRequest.Method.PUT, "/_settings", this);
    }

    @Override
    public void handleRequest(final RestRequest request, final RestChannel channel) {
        UpdateSettingsRequest updateSettingsRequest = updateSettingsRequest(splitIndices(request.param("index")));
        updateSettingsRequest.listenerThreaded(false);

        ImmutableSettings.Builder updateSettings = ImmutableSettings.settingsBuilder();
        String bodySettings = request.content().toUtf8();
        if (Strings.hasText(bodySettings)) {
            try {
                updateSettings.put(ImmutableSettings.settingsBuilder().loadFromSource(bodySettings).build());
            } catch (Exception e) {
                try {
                    channel.sendResponse(new XContentThrowableRestResponse(request, BAD_REQUEST, new SettingsException("Failed to parse index settings", e)));
                } catch (IOException e1) {
                    logger.warn("Failed to send response", e1);
                }
                return;
            }
        }
        for (Map.Entry<String, String> entry : request.params().entrySet()) {
            if (entry.getKey().equals("pretty")) {
                continue;
            }
            updateSettings.put(entry.getKey(), entry.getValue());
        }
        updateSettingsRequest.settings(updateSettings);

        client.admin().indices().updateSettings(updateSettingsRequest, new ActionListener<UpdateSettingsResponse>() {
            @Override
            public void onResponse(UpdateSettingsResponse updateSettingsResponse) {
                try {
                    XContentBuilder builder = RestXContentBuilder.restContentBuilder(request);
                    builder.startObject()
                            .field("ok", true)
                            .endObject();
                    channel.sendResponse(new XContentRestResponse(request, OK, builder));
                } catch (Exception e) {
                    onFailure(e);
                }
            }

            @Override
            public void onFailure(Throwable e) {
                try {
                    channel.sendResponse(new XContentThrowableRestResponse(request, e));
                } catch (IOException e1) {
                    logger.error("Failed to send failure response", e1);
                }
            }
        });
    }
}

@@ -2620,16 +2620,19 @@
 Settings
+Str
  = reque
@@ -2694,16 +2694,19 @@
 Settings
+Str
 )) %7B%0A   
@@ -2732,38 +2732,46 @@
             
-update
+Settings build
 Settings
 .put(Immutab
@@ -2758,21 +2758,19 @@
 Settings
-.put(
+ = 
 Immutabl
@@ -2824,16 +2824,19 @@
 Settings
+Str
 ).build(
@@ -2836,18 +2836,513 @@
 .build()
-)
 ;
+%0A                for (Map.Entry%3CString, String%3E entry : buildSettings.getAsMap().entrySet()) %7B%0A                    String key = entry.getKey();%0A                    String value = entry.getValue();%0A                    // clean up in case the body is wrapped with %22settings%22 : %7B ... %7D%0A                    if (key.startsWith(%22settings.%22)) %7B%0A                        key = key.substring(%22settings.%22.length());%0A                    %7D%0A                    updateSettings.put(key, value);%0A                %7D
 %0A       

Update Settings API: Allow body request to be wrapped with `settings` element to conform with other APIs, closes #2227.