from machine import Pin, ADC, PWM
from time import sleep
from math import log

ntc = ADC(Pin(14))
ntc.atten(ADC.ATTN_11DB)

ledbargraph = [
    Pin(23, Pin.OUT),
    Pin(22, Pin.OUT),
    Pin(21, Pin.OUT),
    Pin(19, Pin.OUT),
    Pin(18, Pin.OUT),
    Pin(5, Pin.OUT),
    Pin(17, Pin.OUT),
    Pin(16, Pin.OUT),
    Pin(4, Pin.OUT),
    Pin(15, Pin.OUT),
]

leds_to_on = 0
temperature_total_value = 0
mapped_temperature = 0
buzzer = PWM(Pin(2, Pin.OUT))
buzzer.freq(400)
buzzer.duty(0)

LEDBARGRAPH_SIZE = 10
MAX_TEMPERATURE = 80 # Celsius
MIN_TEMPERATURE = -24 # Celsius
TOTAL_VALUES = abs(MAX_TEMPERATURE) + abs(MIN_TEMPERATURE) + 1
TEMPERATURE_TO_EACH_LED = TOTAL_VALUES // LEDBARGRAPH_SIZE

def get_temperature_celsius():
    BETA = 3950
    analog_value = ntc.read()
    celsius = 1 / (log(1 / (4096 / analog_value - 1)) / BETA + 1.0 / 298.15) - 273.15
    return celsius

def turn_off_leds(quantity_of_leds: int):
    for led in ledbargraph:
        led.off()

def turn_on_leds(quantity_of_leds: int):
    if quantity_of_leds <= 0:
        quantity_of_leds = 1

    print(f"Leds para acender: {quantity_of_leds}")

    for i in range(quantity_of_leds):
        ledbargraph[i].on()

def alert_buzzer():
    if mapped_temperature < 90:
        buzzer.duty(0)
        return
    
    buzzer.duty(1)

try:
    while True:
        temperature = get_temperature_celsius()

        if temperature <= 0:
            mapped_temperature = abs(abs(temperature) - abs(MIN_TEMPERATURE))
        else:
            mapped_temperature = temperature + 25

        mapped_temperature = round(mapped_temperature)
        leds_to_on = mapped_temperature // TEMPERATURE_TO_EACH_LED
        turn_off_leds(LEDBARGRAPH_SIZE - leds_to_on)
        turn_on_leds(leds_to_on)

        print(f"Temperatura: {temperature}")
        alert_buzzer()
except KeyboardInterrupt:
    print('Programa finalizado')