/* logger.c - Implementasi logger */
#include "logger.h"

#include <stdarg.h>
#include <string.h>
#include <time.h>

static log_level g_min_level = LOG_INFO;
static FILE     *g_out        = NULL;

static const char *level_name(log_level l) {
    switch (l) {
        case LOG_DEBUG: return "DEBUG";
        case LOG_INFO:  return "INFO";
        case LOG_WARN:  return "WARN";
        case LOG_ERROR: return "ERROR";
        case LOG_OFF:   return "OFF";
        default:        return "?";
    }
}

void log_init(log_level min, FILE *out) {
    g_min_level = min;
    g_out = (out != NULL) ? out : stderr;
}

void log_write(log_level level, const char *file, int line,
               const char *fmt, ...) {
    if (level < g_min_level || g_out == NULL) {
        return;
    }
    /* Timestamp sederhana: detik sejak epoch. */
    time_t now = time(NULL);
    struct tm *tm_info = localtime(&now);
    char ts[20];
    strftime(ts, sizeof(ts), "%Y-%m-%d %H:%M:%S", tm_info);

    /* Ambil basename file agar log ringkas. */
    const char *slash = strrchr(file, '/');
    const char *base = (slash != NULL) ? slash + 1 : file;

    fprintf(g_out, "[%s] [%s] %s:%d ", ts, level_name(level), base, line);

    va_list ap;
    va_start(ap, fmt);
    vfprintf(g_out, fmt, ap);
    va_end(ap);

    fputc('\n', g_out);
    fflush(g_out);
}