/**
 * Relational pipes
 * Copyright © 2020 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>

#include "Configuration.h"
#include "INIWriter.h"

namespace relpipe {
namespace out {
namespace ini {

class INILiteralHandler : public relpipe::reader::handlers::RelationalReaderStringHandler {
private:
	INIWriter& writer;
	relpipe::common::type::StringX sectionAttributeName;
	relpipe::common::type::StringX currentSection;
	std::vector<relpipe::reader::handlers::AttributeMetadata> currentAttributes;
	relpipe::common::type::Integer relationCount = 0;
	relpipe::common::type::Integer currentAttributeIndex = 0;
public:

	INILiteralHandler(INIWriter& writer, relpipe::common::type::StringX sectionAttributeName = L"") : writer(writer), sectionAttributeName(sectionAttributeName) {
	}

	virtual ~INILiteralHandler() {
	}

	void startRelation(relpipe::common::type::StringX name, std::vector<relpipe::reader::handlers::AttributeMetadata> attributes) override {
		if (relationCount) writer.endSection();
		currentSection = name;
		currentAttributes = attributes;
		INIWriter::SectionStartEvent e;
		e.name = name;
		writer.startSection(e);
		relationCount++;
	}

	void attribute(const relpipe::common::type::StringX& value) override {
		if (currentAttributeIndex && currentAttributeIndex % currentAttributes.size() == 0) {
			currentAttributeIndex = 0;
			writer.endSection();
			// Usually there should be only one record in each relation.
			// But if there are more of them, we will rather create multiple sections with same name (makes more sense)
			// than duplicate keys in a single section.
			INIWriter::SectionStartEvent e;
			e.name = currentSection;
			writer.startSection(e);
		}

		INIWriter::EntryEvent e;
		e.key = currentAttributes[currentAttributeIndex].getAttributeName();
		e.value = value;
		writer.entry(e);

		currentAttributeIndex++;
	}

	void endOfPipe() {
		writer.endSection();
	}

};

}
}
}