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/*
 * Copyright 2002-2019 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
 *
 *      https://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 com.integralblue.http.client.reactive;

import java.net.URI;
import java.net.http.HttpClient;
import java.util.function.Function;

import lombok.NonNull;
import reactor.core.publisher.Mono;

import org.springframework.core.io.buffer.DataBufferFactory;
import org.springframework.core.io.buffer.DefaultDataBufferFactory;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.reactive.ClientHttpConnector;
import org.springframework.http.client.reactive.ClientHttpRequest;
import org.springframework.http.client.reactive.ClientHttpResponse;

/**
 * {@link ClientHttpConnector} for the Java 11 HTTP client.
 *
 * @author Julien Eyraud
 * @author Craig Andrews
 * @see Java HttpClient
 */
public class JdkClientHttpConnector implements ClientHttpConnector {

	private final HttpClient httpClient;

	private final DataBufferFactory dataBufferFactory;

	/**
	 * Default constructor that creates a new instance of {@link HttpClient} and a {@link DataBufferFactory}.
	 */
	public JdkClientHttpConnector() {
		this(HttpClient.newHttpClient(), new DefaultDataBufferFactory());
	}

	/**
	 * Constructor with an initialized {@link HttpClient} and a initialized {@link DataBufferFactory}.
	 *
	 * @param httpClient {@link HttpClient} to use
	 * @param dataBufferFactory {@link DataBufferFactory} to use
	 */
	public JdkClientHttpConnector(final @NonNull HttpClient httpClient, final @NonNull DataBufferFactory dataBufferFactory) {
		this.httpClient = httpClient;
		this.dataBufferFactory = dataBufferFactory;
	}

	@Override
	public Mono connect(final HttpMethod method, final URI uri, final Function> requestCallback) {
		final JdkClientHttpRequest request = new JdkClientHttpRequest(this.httpClient, method, uri, this.dataBufferFactory);
		return requestCallback.apply(request).then(Mono.defer(request::getResponse));
	}

}