/* 
 * log.c
 *
 * Copyright (C) 2012 James Booth <boothj5@gmail.com>
 * 
 * This file is part of Profanity.
 *
 * Profanity 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, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Profanity 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 Profanity.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#include <stdio.h>
#include <stdlib.h>

#include "glib.h"

#include "log.h"
#include "common.h"

#define PROF "prof"

static FILE *logp;

static GTimeZone *tz;
static GDateTime *dt;
static log_level_t level_filter;

void
log_debug(const char * const msg, ...) 
{
    va_list arg;
    va_start(arg, msg);
    log_msg(PROF_LEVEL_DEBUG, PROF, msg, arg);
    va_end(arg);
}

void
log_info(const char * const msg, ...) 
{
    va_list arg;
    va_start(arg, msg);
    log_msg(PROF_LEVEL_INFO, PROF, msg, arg);
    va_end(arg);
}

void
log_warning(const char * const msg, ...) 
{
    va_list arg;
    va_start(arg, msg);
    log_msg(PROF_LEVEL_WARN, PROF, msg, arg);
    va_end(arg);
}

void
log_error(const char * const msg, ...) 
{
    va_list arg;
    va_start(arg, msg);
    log_msg(PROF_LEVEL_ERROR, PROF, msg, arg);
    va_end(arg);
}

void
log_init(log_level_t filter)
{
    level_filter = filter;
    tz = g_time_zone_new_local();
    GString *log_file = g_string_new(getenv("HOME"));
    g_string_append(log_file, "/.profanity/log");
    create_dir(log_file->str);
    g_string_append(log_file, "/profanity.log");
    logp = fopen(log_file->str, "a");
    g_string_free(log_file, TRUE);
}

log_level_t
log_get_filter(void)
{
    return level_filter;
}

void
log_close(void)
{
    g_time_zone_unref(tz);
    fclose(logp);
}

void
log_msg(log_level_t level, const char * const area, const char * const msg, ...)
{
    if (level >= level_filter) {
        dt = g_date_time_new_now(tz);

        va_list arg;
        va_start(arg, msg);
        GString *msg_formatted = g_string_new(NULL);
        g_string_vprintf(msg_formatted, msg, arg);
        va_end(arg);

        gchar *date_fmt = g_date_time_format(dt, "%d/%m/%Y %H:%M:%S"); 
        fprintf(logp, "%s: %s: %s\n", date_fmt, area, msg_formatted->str);
        g_date_time_unref(dt);
        g_string_free(msg_formatted, TRUE);
    
        fflush(logp);
    }
}