/**

 * Relational pipes

 * Copyright © 2020 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 <vector>

#include <iostream>

#include <relpipe/writer/typedefs.h>

#include <relpipe/cli/CLI.h>

#include <relpipe/cli/RelpipeCLIException.h>

#include "Configuration.h"

namespace relpipe {

namespace in {

namespace ini {

class CLIParser {

private:

	relpipe::writer::string_t readNext(const std::vector<relpipe::writer::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);

	}

	/**

	 * TODO: use a common method

	 */

	bool parseBoolean(const relpipe::writer::string_t& value) {

		if (value == L"true") return true;

		else if (value == L"false") return false;

		else throw relpipe::cli::RelpipeCLIException(L"Unable to parse boolean value: " + value + L" (expecting true or false)", relpipe::cli::CLI::EXIT_CODE_BAD_CLI_ARGUMENTS);

	}

public:

	static const relpipe::writer::string_t OPTION_RELATION;

	static const relpipe::writer::string_t OPTION_PARSER_OPTION;

	static const relpipe::writer::string_t OPTION_ENABLE_SECTIONS;

	static const relpipe::writer::string_t OPTION_ENABLE_SUB_KEYS;

	static const relpipe::writer::string_t OPTION_ENABLE_COMMENTS;

	static const relpipe::writer::string_t OPTION_ENABLE_WHITESPACE;

	static const relpipe::writer::string_t OPTION_ENABLE_LINE_NUMBERS;

	static const relpipe::writer::string_t OPTION_ENABLE_EVENT_NUMBERS;

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

		Configuration c;

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

			relpipe::writer::string_t option = readNext(arguments, i);

			if (option == OPTION_RELATION) c.relation = readNext(arguments, i);

			else if (option == OPTION_PARSER_OPTION) c.parserOptions.push_back({readNext(arguments, i), readNext(arguments, i)});

			else if (option == OPTION_ENABLE_SECTIONS) c.enableSections = parseBoolean(readNext(arguments, i));

			else if (option == OPTION_ENABLE_SUB_KEYS) c.enableSubKeys = parseBoolean(readNext(arguments, i));

			else if (option == OPTION_ENABLE_COMMENTS) c.enableComments = parseBoolean(readNext(arguments, i));

			else if (option == OPTION_ENABLE_WHITESPACE) c.enableWhitespace = parseBoolean(readNext(arguments, i));

			else if (option == OPTION_ENABLE_LINE_NUMBERS) c.enableLineNumbers = parseBoolean(readNext(arguments, i));

			else if (option == OPTION_ENABLE_EVENT_NUMBERS) c.enableEventNumbers = parseBoolean(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 relpipe::writer::string_t CLIParser::OPTION_RELATION = L"--relation";

const relpipe::writer::string_t CLIParser::OPTION_PARSER_OPTION = L"--parser-option";

const relpipe::writer::string_t CLIParser::OPTION_ENABLE_SECTIONS = L"--enable-sections";

const relpipe::writer::string_t CLIParser::OPTION_ENABLE_SUB_KEYS = L"--enable-sub-keys";

const relpipe::writer::string_t CLIParser::OPTION_ENABLE_COMMENTS = L"--enable-comments";

const relpipe::writer::string_t CLIParser::OPTION_ENABLE_WHITESPACE = L"--enable-whitespace";

const relpipe::writer::string_t CLIParser::OPTION_ENABLE_LINE_NUMBERS = L"--enable-line-numbers";

const relpipe::writer::string_t CLIParser::OPTION_ENABLE_EVENT_NUMBERS = L"--enable-event-numbers";

}

}

}