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/*
 * Copyright 2013-2021 the original author or authors.
 *
 * 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.cloudfoundry.reactor;

import org.immutables.value.Value;
import reactor.netty.http.client.HttpClient;
import reactor.netty.tcp.TcpClient;
import reactor.netty.transport.ProxyProvider.Builder;
import reactor.netty.transport.ProxyProvider.Proxy;

import java.util.Optional;
import java.util.function.Function;

/**
 * Proxy configuration
 */
@Value.Immutable
abstract class _ProxyConfiguration {

    public TcpClient configure(TcpClient tcpClient) {
        return tcpClient.proxy(proxyOptions -> {
            Builder builder = proxyOptions.type(Proxy.HTTP).host(getHost());
            getPort().ifPresent(builder::port);
            getUsername().ifPresent(builder::username);
            getPassword().map(password -> (Function) s -> password).ifPresent(builder::password);
        });
    }

    public HttpClient configure(HttpClient client) {
        return client.proxy(proxyOptions -> {
            Builder builder = proxyOptions.type(Proxy.HTTP).host(getHost());
            getPort().ifPresent(builder::port);
            getUsername().ifPresent(builder::username);
            getPassword().map(password -> (Function) s -> password).ifPresent(builder::password);
        });
    }

    /**
     * The proxy host
     */
    abstract String getHost();

    /**
     * The proxy password
     */
    abstract Optional getPassword();

    /**
     * The proxy port
     */
    abstract Optional getPort();

    /**
     * The proxy username
     */
    abstract Optional getUsername();

}