/**
 * Relational pipes
 * Copyright © 2019 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, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 <iostream>
#include <string>
#include <sstream>
#include <vector>

#include <relpipe/writer/typedefs.h>

namespace relpipe {
namespace in {
namespace recfile {

using namespace relpipe::writer;

class RecfileCommand {
private:

	enum class RecfileLineType {
		METADATA,
		DATA
	};

	class RecfileHandler {
	private:
		RelationalWriter* writer;
	public:

		RecfileHandler(RelationalWriter* writer) : writer(writer) {
		}

		virtual ~RecfileHandler() {
		}

		void logicalLine(const string_t& name, const string_t& value, RecfileLineType type) {
			std::wcerr << L"logicalLine(" << name << L", " << value << L", " << (int) type << L");" << std::endl; // TODO: remove debug
			// TODO: writer->startRelation()
			// TODO: writer->writeAttribute()
		}

	};

	class RecfileParser {
	private:
		RecfileHandler& handler;
	public:

		RecfileParser(RecfileHandler& handler) : handler(handler) {
		}

		virtual ~RecfileParser() {
		}

		void parse(std::istream& input) {
			// TODO: parse
			handler.logicalLine(L"nnn", L"vvv", RecfileLineType::METADATA); // TODO: remove debug
			handler.logicalLine(L"nnn", L"vvv", RecfileLineType::DATA); // TODO: remove debug
		}

	};



public:

	void process(std::istream& input, std::ostream& output) {
		unique_ptr<RelationalWriter> writer(Factory::create(output));
		RecfileHandler handler(writer.get());
		RecfileParser parser(handler);
		parser.parse(input);
	}
};

}
}
}