/**
 * Copyright (c) 2013-2024 Nikita Koksharov
 *
 * Licensed 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.redisson.api;

import org.redisson.misc.RedisURI;

import java.util.Map;

/**
 * Maps host and port of RedisURI object using map defined in <code>hostsMap</code> setting.
 *
 * @author Nikita Koksharov
 *
 */
public class HostPortNatMapper implements NatMapper {

    private Map<String, String> hostsPortMap;

    @Override
    public RedisURI map(RedisURI uri) {
        String hostPort = hostsPortMap.get(uri.getHost() + ":" + uri.getPort());
        if (hostPort == null) {
            return uri;
        }

        int lastColonIdx = hostPort.lastIndexOf(":");
        String host = hostPort.substring(0, lastColonIdx);
        String port = hostPort.substring(lastColonIdx + 1);
        return new RedisURI(uri.getScheme(), host, Integer.valueOf(port));
    }

    /**
     * Defines host and port mapping. Host and port as key mapped to host and port as value.
     * Allowed value format: "127.0.0.1:6379"
     *
     * @param hostsPortMap - host and port map
     */
    public void setHostsPortMap(Map<String, String> hostsPortMap) {
        this.hostsPortMap = hostsPortMap;
    }

}
