#include <stdio.h>
#include "block.h"
#define BATDIR "/sys/class/power_supply/BAT0"
#define bat_val(f, n)\
	while((c = fgetc(f)) != '\n') n = 10 * n + (c - '0')
#define bat_open(f,F) if (!f) f = fopen(BATDIR"/"F,"r")
#define EN fenergy_now
#define EF fenergy_full
#define ST fbat_status
FILE *EN, *EF, *ST;
float bat_p;
int bat_state, bat_delay = 6;
char bat_str[13];
void battery(void) {
	if (bat_delay++ < 6) goto show_stat;
	else bat_delay = 0;
	bat_open(EN,"energy_now");
	bat_open(EF,"energy_full");
	bat_open(ST,"status");
	if (fenergy_now) {
		int c, en_n, ef_n;
		rewind(EN); rewind(EF); rewind(ST);
		en_n = ef_n = 0;
		bat_val(fenergy_now, en_n);
		bat_val(fenergy_full, ef_n);
		bat_p = (float)en_n * 100 / ef_n;
		char *icon;
		bat_state = fgetc(fbat_status);
		switch(bat_state) {
			case 'N': icon = ""; break;
			case 'C': icon = "󱐋"; break;
			case 'D': if (bat_p > 79) icon = " ";
				else if (bat_p > 50) icon = " ";
				else if (bat_p > 30) icon = " ";
				else if (bat_p > 10) icon = " ";
				else icon = " ";
		} snprintf(bat_str,13,"%s %02.2f%%",icon,bat_p);
	} show_stat:
	if (bat_state == 'D' && bat_p >= 30)
		block(bat_str,"#222222","#83a59899","#83a59899");
	else if (bat_p < 30)
		block(bat_str,"#222222","#ea544399","#ea544399");
	else if (bat_state == 'N' || bat_state == 'C')
		block(bat_str,"#222222","#dfb24999","#dfb24999");
}