/**

 * 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, 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 <sstream>

#include <string>

#include <vector>

#include <codecvt>

#include <locale>

#include <relpipe/reader/typedefs.h>

#include <relpipe/cli/RelpipeCLIException.h>

using namespace std;

namespace relpipe {

namespace out {

namespace asn1 {

using namespace relpipe::reader;

/**

 * A simple library for writing ASN.1 BER encoded files.

 */

class ASN1Writer {

private:

	ostream& output;

	wstring_convert<codecvt_utf8<wchar_t>> convertor; // only UTF8String is supported

	int sequenceLevel = 0;

	void xxx_indent() {

		// FIXME: remove

		for (int i = 0; i < sequenceLevel; i++) output << "  ";

	}

public:

	ASN1Writer(std::ostream& output) : output(output) {

	}

	virtual ~ASN1Writer() {

		if (sequenceLevel) output << "Unable to close ASN1Writer because there are not ended sequences." << endl; // FIXME: better error handling

		output.flush();

	}

	void writeStartSequence() {

		xxx_indent();

		output << "sequence start" << endl;

		sequenceLevel++;

	}

	void writeEndSequence() {

		if (sequenceLevel == 0) throw cli::RelpipeCLIException(L"Unable to writeEndSequence() if not sequence is currently started.", cli::CLI::EXIT_CODE_UNEXPECTED_ERROR); // should not happen, error in the program

		sequenceLevel--;

		xxx_indent();

		output << "sequence end" << endl;

	}

	void writeBoolean(const boolean_t& value) {

		xxx_indent();

		output << "boolean" << (value ? "true" : "false") << endl;

	}

	void writeInteger(const integer_t& value) {

		xxx_indent();

		output << "integer: " << value << endl;

	}

	void writeString(const string_t& value) {

		xxx_indent();

		output << "string: " << convertor.to_bytes(value) << endl;

	}

};

}

}

}