/**

 * 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 <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/writer/Factory.h>

#include <relpipe/cli/RelpipeCLIException.h>

#include "Configuration.h"

namespace relpipe {

namespace tr {

namespace sed {

using namespace std;

using namespace relpipe;

using namespace relpipe::reader;

using namespace relpipe::reader::handlers;

class SedHandler : public RelationalReaderStringHandler {

private:

	shared_ptr<writer::RelationalWriter> relationalWriter;

	Configuration configuration;

	RelationConfiguration* currentFilter = nullptr;

	std::vector<std::vector<RewriteRule*>> currentRules;

	integer_t currentAttributeIndex = 0;

public:

	SedHandler(shared_ptr<writer::RelationalWriter> relationalWriter, Configuration configuration) : relationalWriter(relationalWriter), configuration(configuration) {

	}

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

		// TODO: move to a reusable method (or use same metadata on both reader and writer side?)

		vector<writer::AttributeMetadata> writerMetadata;

		for (AttributeMetadata readerMetadata : attributes) {

		}

		currentRules.resize(attributes.size());

		for (RelationConfiguration& rc : configuration.relationConfigurations) {

			if (std::regex_match(name, rc.relationPattern) ^ rc.invertMatch[ENTITY::RELATION]) {

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

					for (RewriteRule& rule : rc.rules) {

					}

				}

			}

		}

		relationalWriter->startRelation(name, writerMetadata, true);

	}

	void attribute(const string_t& value) override {

		string_t newValue = value;

		for (RewriteRule* rule : currentRules[currentAttributeIndex]) {

		}

		relationalWriter->writeAttribute(newValue);

		currentAttributeIndex++;

		currentAttributeIndex = currentAttributeIndex % currentRules.size();

	}

	void endOfPipe() {

	}

};

}

}

}