/**
 * 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/>.
 */
#pragma once

#include <memory>
#include <string>
#include <vector>
#include <codecvt>
#include <regex>
#include <stdexcept>

#include <curl/curl.h>

#include <relpipe/common/type/typedefs.h>
#include <relpipe/reader/TypeId.h>
#include <relpipe/reader/handlers/RelationalReaderStringHandler.h>
#include <relpipe/reader/handlers/AttributeMetadata.h>

#include <relpipe/writer/Factory.h>
#include <relpipe/writer/TypeId.h>

#include <relpipe/cli/RelpipeCLIException.h>

#include "Configuration.h"
#include "HTTPClient.h"

namespace relpipe {
namespace tr {
namespace http {

class HTTPHandler : public relpipe::reader::handlers::RelationalReaderStringHandler {
private:
	std::wstring_convert<codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.
	shared_ptr<relpipe::writer::RelationalWriter> relationalWriter;
	Configuration configuration;
	std::vector<relpipe::reader::handlers::AttributeMetadata> currentReaderMetadata;
	std::vector<relpipe::writer::AttributeMetadata> currentWriterMetadata;
	size_t currentAttributeIndex = 0;
	size_t currentRecordNumber = 1;

public:

	HTTPHandler(shared_ptr<relpipe::writer::RelationalWriter> relationalWriter, Configuration configuration) : relationalWriter(relationalWriter), configuration(configuration) {
	}

	virtual ~HTTPHandler() {
	}

	void startRelation(relpipe::common::type::StringX name, std::vector<relpipe::reader::handlers::AttributeMetadata> attributes) override {


		relationalWriter->startRelation(name + L"_curl_info",{
			{L"name", relpipe::writer::TypeId::STRING},
			{L"value", relpipe::writer::TypeId::STRING}
		}, true);

		relationalWriter->writeAttribute(L"curl version");
		relationalWriter->writeAttribute(convertor.from_bytes(curl_version()));

		relationalWriter->startRelation(name + L"_curl_response",{
			{L"url", relpipe::writer::TypeId::STRING},
			{L"body", relpipe::writer::TypeId::STRING},
			{L"response_code", relpipe::writer::TypeId::INTEGER},
			// {L"success", relpipe::writer::TypeId::BOOLEAN},
		}, true);

	}

	void attribute(const relpipe::common::type::StringX& value) override {

		std::shared_ptr<HTTPClient> http(HTTPClient::open());

		HTTPClient::Request request;
		request.method = HTTPClient::Method::GET;
		request.url = convertor.to_bytes(value);

		HTTPClient::Response response = http->exchange(request);
		relpipe::common::type::Integer responseCode = response.responseCode;

		// std::cerr << "url = >>>" << convertor.to_bytes(value) << "<<<" << std::endl;
		// std::cerr << "body = >>>" << response.body << "<<<" << std::endl;

		relationalWriter->writeAttribute(value);
		relationalWriter->writeAttribute(convertor.from_bytes(response.body));
		relationalWriter->writeAttribute(&responseCode, typeid (responseCode));
		// relationalWriter->writeAttribute(&response.success, typeid (response.success));
	}

	void endOfPipe() {

	}

};

}
}
}