/**

 * Relational pipes

 * Copyright © 2019 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 <vector>

#include <relpipe/writer/typedefs.h>

#include <relpipe/cli/CLI.h>

#include <relpipe/cli/RelpipeCLIException.h>

#include "Configuration.h"

namespace relpipe {

namespace tr {

namespace awk {

class CLIParser {

private:

	// FIXME: move common methods/classes to relpipe-lib-cli or relpipe-lib-helper

	string_t readNext(std::vector<string_t> arguments, int& i) {

		if (i < arguments.size()) return arguments[i++];

		else throw relpipe::cli::RelpipeCLIException(L"Missing CLI argument" + (i > 0 ? (L" after " + arguments[i - 1]) : L""), relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);

	}

public:

	static const string_t OPTION_EXPRESSION;

	Configuration parse(const std::vector<string_t>& arguments) {

		Configuration c;

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

			string_t option = readNext(arguments, i);

			if (option == OPTION_EXPRESSION) c.awkExpression = readNext(arguments, i);

			else throw relpipe::cli::RelpipeCLIException(L"Unsupported CLI option: " + option, relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);

		}

		return c;

	}

	virtual ~CLIParser() {

	}

};

const string_t CLIParser::OPTION_EXPRESSION = L"--expression";

}

}

}