/*
 * Copyright 2012-2019 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 org.springframework.boot.actuate.web.trace.reactive;

import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.URI;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import org.springframework.boot.actuate.trace.http.TraceableRequest;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.web.server.ServerWebExchange;

/**
 * A {@link TraceableRequest} backed by a {@link ServerWebExchange}.
 *
 * @author Andy Wilkinson
 */
class ServerWebExchangeTraceableRequest implements TraceableRequest {

	private final String method;

	private final Map<String, List<String>> headers;

	private final URI uri;

	private final String remoteAddress;

	ServerWebExchangeTraceableRequest(ServerWebExchange exchange) {
		ServerHttpRequest request = exchange.getRequest();
		this.method = request.getMethodValue();
		this.headers = request.getHeaders();
		this.uri = request.getURI();
		this.remoteAddress = getRemoteAddress(request);
	}

	private static String getRemoteAddress(ServerHttpRequest request) {
		InetSocketAddress remoteAddress = request.getRemoteAddress();
		InetAddress address = (remoteAddress != null) ? remoteAddress.getAddress() : null;
		return (address != null) ? address.toString() : null;
	}

	@Override
	public String getMethod() {
		return this.method;
	}

	@Override
	public URI getUri() {
		return this.uri;
	}

	@Override
	public Map<String, List<String>> getHeaders() {
		return new LinkedHashMap<>(this.headers);
	}

	@Override
	public String getRemoteAddress() {
		return this.remoteAddress;
	}

}
