/**

 * 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

 *

 * 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 <string>

#include <vector>

#include <iostream>

#include <sstream>

#include <locale>

#include <codecvt>

#include <regex>

#include <relpipe/reader/typedefs.h>

#include <relpipe/reader/TypeId.h>

#include <relpipe/reader/handlers/RelationalReaderStringHandler.h>

#include <relpipe/reader/handlers/AttributeMetadata.h>

#include <relpipe/xmlwriter/XMLWriter.h>

namespace relpipe {

namespace out {

namespace ods {

using namespace relpipe::reader;

using namespace relpipe::xmlwriter;

class OdsHandler : public handlers::RelationalReaderStringHandler {

private:

	shared_ptr<XMLWriter> xmlWriter;

	std::vector<TypeId> columnTypes;

	std::vector<string_t> columnTypeCodes;

	std::vector<string_t> columnNames;

	integer_t valueCount = 0;

	integer_t columnCount = 0;

	integer_t relationCount = 0;

public:

	OdsHandler(std::ostream& output) : xmlWriter(new XMLWriter(output)) {

	}

	void startRelation(string_t name, std::vector<handlers::AttributeMetadata> attributes) override {

		valueCount = 0;

		columnCount = 0;

		if (relationCount == 0) {

			xmlWriter->writeStartElement(L"office:document",{

				L"xmlns:office", L"urn:oasis:names:tc:opendocument:xmlns:office:1.0",

				L"xmlns:table", L"urn:oasis:names:tc:opendocument:xmlns:table:1.0",

				L"xmlns:text", L"urn:oasis:names:tc:opendocument:xmlns:text:1.0",

				L"office:mimetype", L"application/vnd.oasis.opendocument.spreadsheet",

				L"office:version", L"1.2"

			});

			xmlWriter->writeStartElement(L"office:body");

			xmlWriter->writeStartElement(L"office:spreadsheet");

		} else {

			xmlWriter->writeEndElement();

			xmlWriter->writeEndElement();

		}

		relationCount++;

		// TODO: rename relations with same names

		xmlWriter->writeStartElement(L"table:table",{L"table:name", name});

		columnCount = attributes.size();

		columnTypes.resize(columnCount);

		columnTypeCodes.resize(columnCount);

		columnNames.resize(columnCount);

		xmlWriter->writeStartElement(L"table:table-row");

		for (int i = 0; i < attributes.size(); i++) {

			columnNames[i] = attributes[i].getAttributeName();

			columnTypes[i] = attributes[i].getTypeId();

			columnTypeCodes[i] = attributes[i].getTypeName();

			xmlWriter->writeStartElement(L"table:table-cell");

			xmlWriter->writeTextElement(L"text:p",{}, columnNames[i]);

			xmlWriter->writeEndElement();

		}

		xmlWriter->writeEndElement();

	}

	void attribute(const string_t& value) override {

		integer_t i = valueCount % columnCount;

		if (i == 0 && valueCount) xmlWriter->writeEndElement();

		if (i == 0) xmlWriter->writeStartElement(L"table:table-row");

		valueCount++;

		switch (columnTypes[i]) {

			case TypeId::INTEGER:

				xmlWriter->writeEmptyElement(L"table:table-cell",{

					L"office:value-type", L"float",

					L"office:value", value

				});

				break;

			default:

				xmlWriter->writeStartElement(L"table:table-cell");

				xmlWriter->writeTextElement(L"text:p",{}, value);

				xmlWriter->writeEndElement();

		}

	}

	void endOfPipe() {

		if (valueCount) xmlWriter->writeEndElement();

		if (relationCount) xmlWriter->writeEndElement();

		xmlWriter->writeEndElement();

		xmlWriter->writeEndElement();

		xmlWriter->writeEndElement();

	}

};

}

}

}