#!/usr/bin/python3 -u

import time
import psutil

def status_print(status_msg):
    prefix = '['
    postfix = ']'
    result = list()
    for element in status_msg:
        result.append('{"full_text":"' + element + '"}')
    print(prefix + ','.join(result) + postfix)

print('{"version":1}\n[')
while True:
    values = list()
    current_time = time.strftime('%a %d %H:%M')
    values.append(current_time)
    mem = psutil.virtual_memory()
    memory = 'RAM: {}% ({}G)'.format(round(100.0 - mem.percent, 2),
                                     round(mem.available / 2**30, 2))
    values.append(memory)
    with open('/sys/class/power_supply/BAT0/capacity', 'r') as capacity, \
         open('/sys/class/power_supply/BAT0/status', 'r') as status:
        batt_status = status.read().strip()
        batt_capacity = capacity.read().strip()
    if batt_status != 'Discharging':
        batt_status = '↑'
    else:
        batt_status = '↓'
    batt = 'BAT: ' + batt_capacity + '% ' + batt_status
    values.append(batt)
    values.reverse()
    status_print(values)
    time.sleep(5)
    print(',', end='')