/*
* Copyright (c) 2025 Aldrik Ramaekers <aldrik.ramaekers@gmail.com>
* 
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
* 
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/

#include <stdio.h>
#include <stdarg.h>
#include <time.h>
#include "timer.h"
#include "log.hpp"

log g_log = {0};

log* get_log()
{
    return &g_log;
}

void log_add(const char* fmt, ...)
{
    va_list args;
    va_start(args, fmt);
    vsnprintf(g_log.history[g_log.write_cursor], MAX_LEN_LOG_TXT, fmt, args);
    va_end(args);

    tick_t ms_since_epoch = timer_system();
    char time_buf[50];
    time_t seconds = (time_t)(ms_since_epoch / 1000);
    int milliseconds = (int)(ms_since_epoch % 1000);

    // Convert to local time
    struct tm tm_time;
    #if defined(_WIN32)
        localtime_s(&tm_time, &seconds);
    #else
        localtime_r(&seconds, &tm_time);
    #endif

    snprintf(time_buf, 50, "%02d:%02d %02d.%03d",
             tm_time.tm_hour,
             tm_time.tm_min,
             tm_time.tm_sec,
             milliseconds);

    char tmp[MAX_LEN_LOG_TXT];
    snprintf(tmp, MAX_LEN_LOG_TXT, "[%s] %s", time_buf, g_log.history[g_log.write_cursor]);
    tmp[MAX_LEN_LOG_TXT-1] = 0;
    memcpy(g_log.history[g_log.write_cursor], tmp, MAX_LEN_LOG_TXT);

    g_log.write_cursor++;
    if (g_log.write_cursor >= MAX_LEN_LOG_HISTORY) g_log.write_cursor = 0;

    g_log.history_length++;
    if (g_log.history_length > MAX_LEN_LOG_HISTORY) g_log.history_length = MAX_LEN_LOG_HISTORY;
}