import machine
import math
import utime
import random
import time



# Get temperature function which returns temperature from sensor in celsius as float
# Function uses random number in order to have different values
def get_temperature():
    analog_value = adc.read_u16() 
    voltage = (analog_value / 65535) * V_REF
    resistance = R1 / ((V_REF / voltage) - 1)

    kelvin = 1 / (1 / 298.15 + 1 / BETA * math.log(resistance / 10000))
    celsius = kelvin - 273.15
    return round(celsius * get_random_number(), 2)

# Get random number between 0.9 to 1.1 with a chance of 5% that the number is between 0.1 and 1.6
def get_random_number():
    if(random.randint(0,100)< 50):
        return random.uniform(0.1, 1.6)
    else:
        return random.uniform(0.9, 1.1)


# Set Beta ´value for temperature sensor
BETA = 3950  
# Set Resistor value for temperature sensor
R1 = 10000  
# Set reference voltage for temperature sensor
V_REF = 3.3  
# Initialise ADC with temperature sensor connected
adc = machine.ADC(machine.Pin(28))


def generate_timestamp():
    # Custom function to generate a timestamp string
    # Example: "YYYY-MM-DD HH:MM:SS"
    # Note: MicroPython may not support all formatting options like strftime()
    current_time = utime.localtime()  # Get current local time components
    year, month, day, hour, minute, second, *_ = current_time
    return f"{year:04d}-{month:02d}-{day:02d} {hour:02d}:{minute:02d}:{second:02d}"

def main():
    temps = []
    events = []
    while True:
        #implement assignment
        current_temp = get_temperature()
        current_time = generate_timestamp()  # Get current timestamp
        temps.append(current_temp)

        if len(temps) > 100:
            temps = temps[-100:]
            #print(temps)
            #utime.sleep(1)
        
        max_temp = max(temps)
        min_temp = min(temps)

         # Check for temperature events (under 10°C or over 30°C)
        if current_temp < 10 or current_temp > 30:
            # Create an event tuple (temperature, timestamp)
            event = (current_temp, current_time)
            # Append the event to the events list
            events.append(event)
            print(f"{event}")
        utime.sleep(1)
        print(max_temp, min_temp)


        
        



if __name__ == "__main__":
    main()