# MUHAMMAD IKMAL AFIFI BIN ISMAIL (CB230183)
from machine import Pin, I2C, ADC
from time import sleep
from dht import DHT22
from lcd1602 import LCD

# Constants
LED_PIN = 2
DHT_PIN = 20
POT_PIN = 28
I2C_FREQ = 100000

# Initialize hardware
led_pin = Pin(LED_PIN, Pin.OUT)
dht_pin = Pin(DHT_PIN)
pot_pin = Pin(POT_PIN)
dht = DHT22(dht_pin)
adc = ADC(pot_pin)

i2c = I2C(0, sda=Pin(0), scl=Pin(1), freq=I2C_FREQ)
lcd = LCD()

def set_led(state: bool) -> None:
    """Set the LED state"""
    led_pin.value(state)

def read_pot_value() -> int:
    """Read potentiometer value and map it to 0-100 range"""
    return int((adc.read_u16() / 65535) * 100)

def display_data(temp: float, hum: float, threshold_temp: int) -> None:
    """Display data on LCD"""
    lcd.clear()
    lcd.write(0, 0, f'T: {temp:.1f}C')
    lcd.write(9, 0, f'H: {hum:.1f}%')
    lcd.write(0, 1, f'Total Temp: {threshold_temp:.1f}C')

def main() -> None:
    while True:
        dht.measure()
        temp = dht.temperature()
        hum = dht.humidity()
        
        # Read potentiometer value for temperature threshold
        threshold_temp = read_pot_value()

        print(f"Temperature: {temp:.1f}C")
        print(f"Humidity: {hum:.1f}%")
        print(f"Threshold Temp: {threshold_temp:.1f}C")

        display_data(temp, hum, threshold_temp)

        sleep(1)

        if temp > 40 and threshold_temp > 40:
            set_led(True)  # Turn on LED
        else:
            set_led(False)  # Turn off LED

if __name__ == '__main__':
    main()