/**

 * Relational pipes

 * Copyright © 2022 František Kučera (Frantovo.cz, GlobalCode.info)

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, version 3 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. If not, see <http://www.gnu.org/licenses/>.

 */

#include <sstream>

#include <curl/curl.h>

#include "HTTPClient.h"

namespace relpipe {

namespace tr {

namespace http {

class HTTPClient::HTTPClientImpl {

public:

	CURL* curl;

	std::stringstream responseBody;

	std::vector<std::string> responseHeaders;

	HTTPClientImpl(CURL* curl) : curl(curl) {

	}

	static size_t curlWriteCallback(char* buffer, size_t size, size_t nmemb, HTTPClient::HTTPClientImpl * impl) {

		size_t r = size * nmemb;

		impl->responseBody.write(buffer, r);

		return r;

	}

};

HTTPClient* HTTPClient::open() {

	return new HTTPClient(new HTTPClient::HTTPClientImpl(curl_easy_init()));

}

HTTPClient::~HTTPClient() {

	curl_easy_cleanup(impl->curl);

	delete impl;

}

const HTTPClient::Response HTTPClient::exchange(const Request& request) {

	HTTPClient::Response response;

	// TODO: set request headers

	// TODO: set request method

	// TODO: get response headers

	curl_easy_setopt(impl->curl, CURLOPT_URL, request.url.c_str());

	curl_easy_setopt(impl->curl, CURLOPT_WRITEDATA, impl);

	curl_easy_setopt(impl->curl, CURLOPT_WRITEFUNCTION, HTTPClientImpl::curlWriteCallback);

	// curl_easy_setopt(curl, CURLOPT_HEADERDATA, this);

	// curl_easy_setopt(curl, CURLOPT_HEADERFUNCTION, headersCurlCallback);

	curl_easy_perform(impl->curl);

	curl_easy_getinfo(impl->curl, CURLINFO_RESPONSE_CODE, &response.responseCode);

	response.success = response.responseCode >= 200 && response.responseCode <= 299;

	response.body = impl->responseBody.str();

	impl->responseBody = std::stringstream();

	return response;

}

}

}

}