/**

 * 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 <locale.h>

#include <string>

#include <vector>

#include <sstream>

#include <locale>

#include <codecvt>

#include <iostream>

using namespace std;

namespace relpipe {

namespace cli {

/**

 * a common header-only library for CLI programs

 */

class CLI {

public:

	CLI(int argc, char* argv[]) {

		setlocale(LC_ALL, "");

		this->argc = &argc;

		this->argv = &argv;

		program = convertor.from_bytes(argv[0]);

		for (int i = 1; i < argc; i++) {

			args.insert(args.end(), convertor.from_bytes(argv[i]));

		}

	}

	CLI(const CLI& orig) {

	}

	virtual ~CLI() {

	}

	const wstring programName() {

		return (const wstring) program;

	}

	const vector<wstring> arguments() {

		return (const vector<wstring>)args;

	}

	static const int EXIT_CODE_SUCCESS = 0;

	static const int EXIT_CODE_UNEXPECTED_ERROR = 1;

	static const int EXIT_CODE_BAD_SYNTAX = 3;

	static const int EXIT_CODE_UNKNOWN_COMMAND = 4;

	static const int EXIT_CODE_DATA_ERROR = 5;

	static const int EXIT_CODE_BAD_CLI_ARGUMENTS = 6;

	/**

	 * std::cin and std::cout are "tied" by default i.e. reading from std::cin causes flush of the std::cout.

	 * Call this to "untie" them and have less write() calls (better buffering).

	 */

	static void untieStdIO() {

		std::cin.tie(nullptr);

	}

private:

	int* argc;

	char*** argv;

	wstring program;

	vector<wstring> args;

	wstring_convert<codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.

};

}

}