/**
 * 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 INIStandardHandler : public relpipe::reader::handlers::RelationalReaderStringHandler {
private:
	INIWriter& writer;
	size_t currentAttributeIndex = 0;
	std::vector<relpipe::reader::handlers::AttributeMetadata> currentAttributes;
	relpipe::common::type::StringX previousSection;
	relpipe::common::type::StringX currentSection;
	relpipe::common::type::StringX currentKey;
	relpipe::common::type::StringX currentSubKey;
	relpipe::common::type::StringX currentValue;
	relpipe::common::type::StringX currentComment;
	relpipe::common::type::StringX currentWhitespace;
	bool hasSections = false;
public:

	INIStandardHandler(INIWriter& writer) : writer(writer) {
	}

	virtual ~INIStandardHandler() {
	}

	void startRelation(relpipe::common::type::StringX name, std::vector<relpipe::reader::handlers::AttributeMetadata> attributes) override {
		currentAttributes = attributes;
		currentSection.clear();
		currentKey.clear();
		currentSubKey.clear();
		currentValue.clear();
		currentComment.clear();
		currentWhitespace.clear();
	}

	void attribute(const relpipe::common::type::StringX& value) override {
		auto name = currentAttributes[currentAttributeIndex % currentAttributes.size()].getAttributeName();
		if (name == L"section") currentSection = value;
		else if (name == L"key") currentKey = value;
		else if (name == L"sub_key") currentSubKey = value;
		else if (name == L"value") currentValue = value;
		else if (name == L"comment") currentComment = value;
		else if (name == L"whitespace") currentWhitespace = value;

		currentAttributeIndex++;

		if (currentAttributeIndex == currentAttributes.size()) {
			currentAttributeIndex = 0;

			if (currentSection != previousSection) {
				if (previousSection.size()) writer.endSection();
				writer.startSection({
					.comment = currentKey.empty() ? currentComment : L"",
					.name = currentSection,
					.tag = L"",
				});
				previousSection = currentSection;
				hasSections = true;
			}

			if (currentKey.size()) {
				writer.entry({
					.comment = currentComment,
					.key = currentKey,
					.subKey = currentSubKey,
					.value = currentValue,
				});
			} else if (currentComment.size()) {
				writer.comment({
					.comment = currentComment,
				});
			} else if (currentWhitespace.size()) {
				writer.whitespace({
					.whitespace = currentWhitespace,
				});
			}
		}
	}

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

};

}
}
}