/*
 * 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.client.transport;

import org.elasticsearch.action.Action;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.ActionRequest;
import org.elasticsearch.action.ActionRequestBuilder;
import org.elasticsearch.action.ActionResponse;
import org.elasticsearch.action.GenericAction;
import org.elasticsearch.action.TransportActionNodeProxy;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.transport.TransportService;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import static java.util.Collections.unmodifiableMap;

final class TransportProxyClient {

    private final TransportClientNodesService nodesService;
    private final Map<Action, TransportActionNodeProxy> proxies;

    TransportProxyClient(Settings settings, TransportService transportService,
                                TransportClientNodesService nodesService, List<GenericAction> actions) {
        this.nodesService = nodesService;
        Map<Action, TransportActionNodeProxy> proxies = new HashMap<>();
        for (GenericAction action : actions) {
            if (action instanceof Action) {
                proxies.put((Action) action, new TransportActionNodeProxy(settings, action, transportService));
            }
        }
        this.proxies = unmodifiableMap(proxies);
    }

    public <Request extends ActionRequest, Response extends ActionResponse, RequestBuilder extends
        ActionRequestBuilder<Request, Response, RequestBuilder>> void execute(final Action<Request, Response, RequestBuilder> action,
                                                                              final Request request, ActionListener<Response> listener) {
        final TransportActionNodeProxy<Request, Response> proxy = proxies.get(action);
        nodesService.execute((n, l) -> proxy.execute(n, request, l), listener);
    }
}