/**
 * Relational pipes
 * Copyright © 2018 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 <iostream>
#include <sstream>
#include <locale>
#include <codecvt>

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

namespace relpipe {
namespace out {
namespace yaml {

class YAMLHandler : public relpipe::reader::handlers::RelationalReaderStringHandler {
private:
	std::ostream& output;
	std::wstring_convert<std::codecvt_utf8<wchar_t>> convertor; // we generate YAML always in UTF-8 like XML?
	std::vector<relpipe::reader::handlers::AttributeMetadata> currentAttributes;
	size_t currentAttributeIndex = 0;

	void writeYamlValue(const relpipe::common::type::StringX& value) {
		// TODO: escaping
		output << convertor.to_bytes(value);
	}
public:

	YAMLHandler(std::ostream& output) : output(output) {
	}

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

	void attribute(const relpipe::common::type::StringX& value) override {
		if (currentAttributeIndex % currentAttributes.size() == 0) {
			currentAttributeIndex = 0;
			
		} else {
			
		}

		currentAttributeIndex++;
	}

	void endOfPipe() {
		output.flush();
	}

};

}
}
}