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

ldr = ADC(34)

r_led = Pin(25, Pin.OUT)
y_led = Pin(26, Pin.OUT)
g_led = Pin(27, Pin.OUT)

buzzer = PWM(Pin(23, Pin.OUT))
buzzer.freq(400)

previous_times_to_alert = 0

def adc_to_percent(value):
    return 100 * (value / 4095)

while True:
    darkness_percent = adc_to_percent(ldr.read())
    luminosity_percent = abs(darkness_percent - 100)
    times_to_alert = 0

    print(f"Luminosidade local: {luminosity_percent}%")

    if luminosity_percent <= 100 and luminosity_percent >= 80:
        r_led.on()
        y_led.off()
        g_led.off()
        times_to_alert = 3
    elif luminosity_percent < 80 and luminosity_percent >= 50:
        r_led.off()
        y_led.on()
        g_led.off()
        times_to_alert = 2
    elif luminosity_percent < 50:
        r_led.off()
        y_led.off()
        g_led.on()
        times_to_alert = 1

    if times_to_alert != previous_times_to_alert:
        for _ in range(times_to_alert):
            buzzer.duty(1)
            sleep(1)
            buzzer.duty(0)
            sleep(1)

    previous_times_to_alert = times_to_alert
    sleep(0.2)