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

#include "logger.h"

void create_logger(char* logpath, LogLevel level) {
    logger->t0 = clock();
    logger->level = level;
    
    if (logpath[0] != '\0')
    {
        logger->logfile = fopen(logpath, "w");
    }
    else
        logger->logfile = NULL;
}

void destroy_logger() {
    if (logger->logfile != NULL)
        fclose(logger->logfile);
    free(logger);
}

void logprint(LogLevel level, char* str, va_list args)
{
    clock_t t = clock();

    char label[6];
    switch (level)
    {
        case (PANIC):
            strcpy(label, "PANIC");
            break;
        case (FATAL):
            strcpy(label, "FATAL");
            break;
        case (ERROR):
            strcpy(label, "ERROR");
            break;
        case (WARN):
            strcpy(label, "WARN");
            break;
        case (INFO):
            strcpy(label, "INFO");
            break;
        case (DEBUG):
            strcpy(label, "DEBUG");
            break;
        case (TRACE):
            strcpy(label, "TRACE");
            break;
    }

    FILE* stream = (level >= WARN) ? stderr : stdout;

    if (level < logger->level)
        return;

    fprintf(stream, "[%s][%f]: ", label, (double)t / CLOCKS_PER_SEC);
    vfprintf(stream, str, args);
    fprintf(stream, "\n");

    if (logger->logfile != NULL)
    {
        fprintf(logger->logfile, "[%s][%f]: ", label, (double)t / CLOCKS_PER_SEC);
        vfprintf(logger->logfile, str, args);
        fprintf(logger->logfile, "\n");
    }
}


void panic(char *str, ...)
{
    va_list args;
    va_start(args, str);
    logprint(PANIC, str, args);
    va_end(args);
}

void fatal(char *str, ...)
{
    va_list args;
    va_start(args, str);
    logprint(FATAL, str, args);
    va_end(args);
}

void error(char *str, ...)
{
    va_list args;
    va_start(args, str);
    logprint(ERROR, str, args);
    va_end(args);
}

void warn(char *str, ...)
{
    va_list args;
    va_start(args, str);
    logprint(WARN, str, args);
    va_end(args);
}

void info(char *str, ...)
{
    va_list args;
    va_start(args, str);
    logprint(INFO, str, args);
    va_end(args);
}

void debug(char *str, ...)
{
    va_list args;
    va_start(args, str);
    logprint(DEBUG, str, args);
    va_end(args);
}

void trace(char *str, ...)
{
    va_list args;
    va_start(args, str);
    logprint(TRACE, str, args);
    va_end(args);
}


int main()
{
    create_logger("logger.log", TRACE);

    info("Je me lève.");
    trace("Il y a un oiseau derrière la fenêtre.");
    info("Je sors de ma chambre. Il fait %d degrés.", 18);
    warn("Je trébuche.");
    info("Je descends les escaliers");
    info("Je suis dans la rue");
    panic("Je meurs");

    destroy_logger();
}