/*
 * Fast and easy way to gather the necessary information for dwm status bar
 *
 * Compile with gcc -Wall -lacpi -lcpufreq -o statusbar statusbar.c
 *
 * Copyright (c) 2007 T. Klauser <tklauser@distanz.ch>
 */

#define _GNU_SOURCE

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <libacpi.h>
#include <cpufreq.h>

#define DATE_STR "%a %Y-%m-%d %H:%M:%S"

int main(int argc, char **argv)
{
	time_t today;
	struct tm tim;
	char str[25];
	unsigned long freq, tmp_freq;
	double load[3];
	global_t g;

	if (check_acpi_support() == NOT_SUPPORTED)
		return -1;
	if (!(init_acpi_batt(&g) == SUCCESS))
		return -1;
	if (!(init_acpi_thermal(&g) == SUCCESS))
		return -1;

	/* 1) Date */
	time(&today);
	tim = *localtime(&today);
	strftime(str, 25, DATE_STR, &tim);
	str[25] = '\0';
	printf("%s | ", str);

	/* 2) Battery percentage (only the first battery matters for now) */
	read_acpi_batt(0);
	if (batteries[0].present)
		printf("%d%% | ", batteries[0].percentage);

	/* 3) Temperature */
	printf("%d C | ", g.temperature);

	/* 4) Current CPU frequency */
	freq = cpufreq_get_freq_kernel(0);
	if (!freq)
		return -1;

	/* Taken from cpufrequtils */
	if (freq > 1000000) {
		tmp_freq = freq % 10000;
		if (tmp_freq >= 5000)
			freq += 10000;
		printf("%u.%02u G", ((unsigned int) freq / 1000000),
				((unsigned int) (freq % 1000000) / 10000));
	} else if (freq > 100000) {
		tmp_freq = freq % 1000;
		if (tmp_freq >= 500)
			freq += 1000;
		printf("%u M", ((unsigned int) freq / 1000));
	} else if (freq > 1000) {
		tmp_freq = freq % 100;
		if (tmp_freq >= 50)
			freq += 100;
		printf("%u.%01u M", ((unsigned int) freq / 1000),
				((unsigned int) (freq % 1000) / 100));
	} else
		printf("%lu k", freq);

	printf("Hz | ");

	/* 5) Load average */
	if (getloadavg(load, 3) < 0)
		return -1;
	printf("%.02f %.02f %.02f\n", load[0], load[1], load[2]);

	return 0;
}