"""
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Interfacing A Joystick Module On The Raspberry Pi Using   ┃
┃ An Mcp3008 (MicroPython)                                  ┃
┃                                                           ┃
┃ Utilize Wokwi simulation tool. Use a joystick module to   ┃
┃ control an LED selection and use the potentiometer to     ┃
┃ adjust the brightness.                                    ┃
┃                                                           ┃
┃ Copyright (c) 2024 CPE4B - Group 1                        ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
"""

from machine import Pin, PWM, ADC
import utime

# Joystick setup
xAxis = ADC(Pin(27))  # Joystick x-axis input on GPIO 27
yAxis = ADC(Pin(26))  # Joystick y-axis input on GPIO 26
button = Pin(16, Pin.IN, Pin.PULL_UP)  # Joystick button input with pull-up resistor on GPIO 16

# Potentiometer setup for brightness control
potentiometer = ADC(Pin(28))  # Potentiometer input on GPIO 28 to adjust LED brightness

# Simulated Hall effect sensor on GPIO 29
hall_effect_sensor = ADC(Pin(29))  # Analog input for the hall effect sensor on GPIO 29

# LED setup
led_red = PWM(Pin(15))  # Red LED connected to GPIO 15, using PWM for brightness control
led_green = PWM(Pin(14))  # Green LED connected to GPIO 14
led_blue = PWM(Pin(13))  # Blue LED connected to GPIO 13
led_red.freq(1000)  # Set PWM frequency for Red LED
led_green.freq(1000)  # Set PWM frequency for Green LED
led_blue.freq(1000)  # Set PWM frequency for Blue LED

# Track selected LED and LED state (on/off)
selected_led = led_red  # Default selected LED is Red
led_on = False  # LED starts in the off state

def display_status():
    """
    Display the current status of sensors and voltage:
    - Hall effect sensor value
    - Potentiometer ADC value and calculated voltage
    """
    hall_value = hall_effect_sensor.read_u16()  # Read hall effect sensor value (0-65535)
    pot_value = potentiometer.read_u16()  # Read potentiometer value (0-65535)
    
    # Calculate the voltage from ADC reading (assuming 3.3V reference voltage)
    voltage = pot_value * 3.3 / 65535
    
    # Print sensor and voltage status to the console
    print(f"Hall Effect = {hall_value} | Potentiometer = {pot_value} | Voltage = {voltage:.2f}V")

while True:
    # Joystick readings
    xValue = xAxis.read_u16()  # Read joystick x-axis position (0-65535)
    yValue = yAxis.read_u16()  # Read joystick y-axis position (0-65535)
    button_pressed = button.value() == 0  # Check if joystick button is pressed (active low)

    # Joystick controls LED selection
    if xValue <= 600:  # Move joystick left to select Red LED
        selected_led = led_red
        print("Selected LED: Red")
    elif xValue >= 60000:  # Move joystick right to select Green LED
        selected_led = led_green
        print("Selected LED: Green")
    elif yValue <= 600:  # Move joystick up to select Blue LED
        selected_led = led_blue
        print("Selected LED: Blue")
    
    # Toggle the selected LED on/off when the button is pressed
    if button_pressed:
        led_on = not led_on  # Change LED state (on/off)
        utime.sleep(0.3)  # Debounce delay to avoid multiple toggles

    # Adjust brightness if LED is on
    if led_on:
        brightness = potentiometer.read_u16()  # Read potentiometer for brightness level (0-65535)
        selected_led.duty_u16(brightness)  # Set PWM duty cycle to adjust brightness
    else:
        # If LED is off, set brightness to 0 (turn off the LED)
        selected_led.duty_u16(0)
    
    # Display sensor and potentiometer status
    display_status()
    
    # Delay for stability
    utime.sleep(0.1)