/*
 * Mirai. Copyright (C) 2024 Vyn
 * This file is licensed under version 3 of the GNU General Public License (GPL-3.0-only)
 * The license can be found in the LICENSE file or at https://www.gnu.org/licenses/gpl-3.0.txt
 */

#include "mirai-core/DateTime.h"
#include <charconv>
#include <optional>
#include <ranges>
#include <string>
#include <vector>

namespace mirai
{

std::optional<mirai::Date> stringToDate(const std::string &dateStr)
{
	using std::operator""sv;

	auto dateSplitView =
		dateStr | std::views::split("-"sv) | std::views::transform([](auto v) -> int {
			int i = 0;
			std::from_chars(v.data(), v.data() + v.size(), i);
			return i;
		});
	std::vector<int> dateSplit{dateSplitView.begin(), dateSplitView.end()};
	if (dateSplit.size() != 3) {
		return std::nullopt;
	}

	auto year = dateSplit[0];
	auto month = dateSplit[1];
	auto day = dateSplit[2];
	return mirai::Date(year, static_cast<unsigned>(month), static_cast<unsigned>(day));
}
} // namespace mirai