/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.hc.core5.http.impl;

import java.net.InetSocketAddress;

import org.apache.hc.core5.function.Resolver;
import org.apache.hc.core5.http.HttpHost;
import org.apache.hc.core5.http.URIScheme;

/**
 * Default {@link HttpHost} to {@link InetSocketAddress} resolver.
 *
 * @since 5.0
 */
public final class DefaultAddressResolver implements Resolver<HttpHost, InetSocketAddress> {

    /**
     * The singleton instance.
     */
    public static final DefaultAddressResolver INSTANCE = new DefaultAddressResolver();

    @Override
    public InetSocketAddress resolve(final HttpHost host) {
        if (host == null) {
            return null;
        }
        int port = host.getPort();
        if (port < 0) {
            final String scheme = host.getSchemeName();
            if (URIScheme.HTTP.same(scheme)) {
                port = 80;
            } else if (URIScheme.HTTPS.same(scheme)) {
                port = 443;
            }
        }
        if (host.getAddress() != null) {
            return new InetSocketAddress(host.getAddress(), port);
        }
        return new InetSocketAddress(host.getHostName(), port);
    }

}
