from machine import ADC, Pin
import time

# SENSOR CLASS
class TemperatureSensor:
    def __init__(self, pin):
        self.adc = ADCPin(pin))
        self.adc.atten(ADC.ATTN_11DB)
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    def read(self):
        # Convert ADC value to percentage (0–100)
        return (self.adc.read() / 4095) * 100


#LED CLASS 
class LED:
    def __init__(self, pin):
        self.led = Pin(pin, Pin.OUT)

    def on(self):
        self.led.value(1)

    def off(self):
        self.led.value(0)


# ---------------- OBJECT CREATION ----------------
temp_sensor = TemperatureSensor(34)

red_led = LED(26)     # WARNING
green_led = LED(27)   # CRITICAL (buzzer simulation)

# ---------------- THRESHOLDS ----------------
WARNING_LEVEL = 50
CRITICAL_LEVEL = 80

# ---------------- MAIN LOOP ----------------
while True:

    temp = temp_sensor.read()
    print("Temperature:", round(temp, 2), "%")

    # ---------------- STATE MACHINE ----------------

    # NORMAL STATE (SAFE)
    if temp < WARNING_LEVEL:
        state = "NORMAL"
        red_led.off()
        green_led.off()

    # WARNING STATE
    elif WARNING_LEVEL <= temp < CRITICAL_LEVEL:
        state = "WARNING"
        red_led.on()
        green_led.off()

    # CRITICAL STATE
    else:
        state = "CRITICAL"
        red_led.off()
        green_led.on()   # alarm simulation

    print("STATE:", state)

    time.sleep(1)