#! /usr/bin/env python3

from led import LED
from gpiozero import CPUTemperature
from time import sleep
from math import fabs

cpu = CPUTemperature()
led = LED(8, freq=25000)

led.set_duty_cycle(0)
temp_levels = [45,50,55,60,65]

last_value = -1
last_temp = 0
hyst = 2

while True:
    temp = cpu.temperature
    level = 0
    for limit in temp_levels:
        if temp >= limit:
            level +=1
    fan_speed_percent = int((100/len(temp_levels))*level)
    temp_diff = fabs(last_temp - temp)
    # print(f"Temp is {temp}°C and fan level is {level} at {fan_speed_percent}%")
    if fan_speed_percent != last_value and temp_diff > hyst:
        # print(f"CPU temp of {temp}°C is equal to level '{level}' with fan at {fan_speed_percent}%")
        led.set_duty_cycle(fan_speed_percent)
        last_value = fan_speed_percent
        last_temp = temp
    sleep(5)