#include "logger.hpp"
#include <mutex>
#include <unistd.h>
#include <sys/time.h>
#include <ctime>
#include <iomanip>

using namespace sc;

std::mutex logger::_mtx;

logger::logger(const std::string& name, loglevel level)
    : _level(level), _name(name) {}

void logger::msg(loglevel level, const sc::io::trgb* color,
                 const char* file, int line, const char* func) {
    if (level >= _level) {
        std::lock_guard<std::mutex> lock {_mtx};
        if (_topcall) {
            write_prefix(level, color, file, line, func);
        } else {
            _topcall = true;
        }
        std::cerr << std::endl;
        if (color) {
            std::cerr << sc::io::reset;
        }
    }
}

void logger::write_prefix(loglevel level, const sc::io::trgb* color,
                          const char* file, int line, const char* func) {
    // retrieve accurate time for milliseconds display
    struct timeval secs;
    (void)::gettimeofday(&secs, nullptr);

    // create a date/time stamp
    char dtstamp[20];
    std::strftime(dtstamp, 20, "%F %T", std::localtime(&secs.tv_sec));

    if (color) {
        sc::io::rgbf col {sc::io::rgbf(const_cast<sc::io::trgb&>(*color))};
        std::cerr << col;
    }
    std::cerr << dtstamp << "." << std::setfill('0') << std::setw(6) << secs.tv_usec << " ";
    std::cerr << _name << "[" << ::getpid() << "] ";
    std::cerr << file << ":" << line << " " << func << "() ";
    std::cerr << '[' << loglevel_desc(level) << "] ";
}