/*  This file is part of remwharead.
 *  Copyright © 2019 tastytea <tastytea@tastytea.de>
 *
 *  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.
 *
 *  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/>.
 */

#include "time.hpp"
#include "sqlite.hpp"
#include <array>
#include <cstdint>
#include <ctime>
#include <iomanip>
#include <sstream>

namespace remwharead
{
using std::array;

time_point string_to_timepoint(const string &strtime, bool sqlite)
{
    std::stringstream sstime(strtime);
    struct std::tm tm = {};
    tm.tm_isdst = -1;           // Don't convert to/from daylight saving time.
    if (sqlite)
    {
        sstime >> std::get_time(&tm, "%Y-%m-%d %T");
    }
    else
    {
        sstime >> std::get_time(&tm, "%Y-%m-%dT%T");
    }
    std::time_t time = mktime(&tm);
    return system_clock::from_time_t(time);
}

string timepoint_to_string(const time_point &tp, bool sqlite)
{
    constexpr std::uint16_t bufsize = 32;
    std::time_t time = system_clock::to_time_t(tp);
    std::tm *tm;
    tm = std::localtime(&time);

    array<char, bufsize> buffer = {};

    if (sqlite)
    {
        std::strftime(buffer.begin(), bufsize, "%F %T", tm);
    }
    else
    {
        std::strftime(buffer.begin(), bufsize, "%FT%T", tm);
    }

    return buffer.begin();
}
} // namespace remwharead