/*
 * Copyright (c)2019 ZeroTier, Inc.
 *
 * Use of this software is governed by the Business Source License included
 * in the LICENSE.TXT file in the project's root directory.
 *
 * Change Date: 2023-01-01
 *
 * On the date above, in accordance with the Business Source License, use
 * of this software will be governed by version 2.0 of the Apache License.
 */
/****/

#ifndef ZT_HTTP_HPP
#define ZT_HTTP_HPP

#include <string>
#include <map>
#include <stdexcept>

#if defined(_WIN32) || defined(_WIN64)
#include <WinSock2.h>
#include <WS2tcpip.h>
#include <Windows.h>
#else
#include <unistd.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#endif

namespace ZeroTier {

/**
 * Simple synchronous HTTP client used for updater and cli
 */
class Http
{
public:
	/**
	 * Make HTTP GET request
	 *
	 * The caller must set all headers, including Host.
	 *
	 * @return HTTP status code or 0 on error (responseBody will contain error message)
	 */
	static inline unsigned int GET(
		unsigned long maxResponseSize,
		unsigned long timeout,
		const struct sockaddr *remoteAddress,
		const char *path,
		const std::map<std::string,std::string> &requestHeaders,
		std::map<std::string,std::string> &responseHeaders,
		std::string &responseBody)
	{
		return _do(
			"GET",
			maxResponseSize,
			timeout,
			remoteAddress,
			path,
			requestHeaders,
			(const void *)0,
			0,
			responseHeaders,
			responseBody);
	}

	/**
	 * Make HTTP DELETE request
	 *
	 * The caller must set all headers, including Host.
	 *
	 * @return HTTP status code or 0 on error (responseBody will contain error message)
	 */
	static inline unsigned int DEL(
		unsigned long maxResponseSize,
		unsigned long timeout,
		const struct sockaddr *remoteAddress,
		const char *path,
		const std::map<std::string,std::string> &requestHeaders,
		std::map<std::string,std::string> &responseHeaders,
		std::string &responseBody)
	{
		return _do(
			"DELETE",
			maxResponseSize,
			timeout,
			remoteAddress,
			path,
			requestHeaders,
			(const void *)0,
			0,
			responseHeaders,
			responseBody);
	}

	/**
	 * Make HTTP POST request
	 *
	 * It is the responsibility of the caller to set all headers. With POST, the
	 * Content-Length and Content-Type headers must be set or the POST will not
	 * work.
	 *
	 * @return HTTP status code or 0 on error (responseBody will contain error message)
	 */
	static inline unsigned int POST(
		unsigned long maxResponseSize,
		unsigned long timeout,
		const struct sockaddr *remoteAddress,
		const char *path,
		const std::map<std::string,std::string> &requestHeaders,
		const void *postData,
		unsigned long postDataLength,
		std::map<std::string,std::string> &responseHeaders,
		std::string &responseBody)
	{
		return _do(
			"POST",
			maxResponseSize,
			timeout,
			remoteAddress,
			path,
			requestHeaders,
			postData,
			postDataLength,
			responseHeaders,
			responseBody);
	}

	/**
	 * Make HTTP PUT request
	 *
	 * It is the responsibility of the caller to set all headers. With PUT, the
	 * Content-Length and Content-Type headers must be set or the PUT will not
	 * work.
	 *
	 * @return HTTP status code or 0 on error (responseBody will contain error message)
	 */
	static inline unsigned int PUT(
		unsigned long maxResponseSize,
		unsigned long timeout,
		const struct sockaddr *remoteAddress,
		const char *path,
		const std::map<std::string,std::string> &requestHeaders,
		const void *postData,
		unsigned long postDataLength,
		std::map<std::string,std::string> &responseHeaders,
		std::string &responseBody)
	{
		return _do(
			"PUT",
			maxResponseSize,
			timeout,
			remoteAddress,
			path,
			requestHeaders,
			postData,
			postDataLength,
			responseHeaders,
			responseBody);
	}

private:
	static unsigned int _do(
		const char *method,
		unsigned long maxResponseSize,
		unsigned long timeout,
		const struct sockaddr *remoteAddress,
		const char *path,
		const std::map<std::string,std::string> &requestHeaders,
		const void *requestBody,
		unsigned long requestBodyLength,
		std::map<std::string,std::string> &responseHeaders,
		std::string &responseBody);
};

} // namespace ZeroTier

#endif