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

# ---- Pins ----
POT1, POT2 = 33, 32
LED1_PIN, LED2_PIN = 19, 18
BTN_MODE = 16

# ---- Inputs ----
pot1 = ADC(Pin(POT1))          # ~0..4095
pot2 = ADC(Pin(POT2))          # ~0..4095
btn  = Pin(BTN_MODE, Pin.IN, Pin.PULL_UP)   # released=1, pressed=0

# ---- Outputs ----
led1 = PWM(Pin(LED1_PIN), freq=1000)   # duty 0..1023
led2 = PWM(Pin(LED2_PIN), freq=1000)

# ---- Helpers ----
def to_duty(raw):
    if raw < 0: raw = 0  # Clamping Data less than 0
    if raw > 4095: raw = 4095 # Clamping Data more than 4095
    return (raw * 1023) // 4095 # Mapping raw value to duty

def inv(duty):
    return 1023 - duty

def print_mode(m):
    if m == 1:
        print(" Control Mode 1 : LED 1 Direct - LED 2 Direct ")
        print("--------------------------------------------")
    elif m == 2:
        print(" Control Mode 2 : LED 1 Inverted - LED 2 Direct ")
        print("--------------------------------------------")
    elif m == 3:
        print(" Control Mode 3 : LED 1 Direct - LED 2 Inverted")
        print("--------------------------------------------")
    else:  # m == 4
        print(" Control Mode 4 : LED 1 Inverted - LED 2 Inverted")
        print("--------------------------------------------")

# ---- Mode state ----
# m=1: LED1 natural, LED2 natural
# m=2: LED1 inverted, LED2 natural
# m=3: LED1 natural, LED2 inverted
# m=4: LED1 inverted, LED2 inverted
m = 1
last_btn = 1
print_mode(m)

while True:
    # Button: detect press (1->0), then cycle 1..4
    now = btn.value()
    if last_btn == 1 and now == 0:   # pressed
        m += 1
        if m > 4:
            m = 1
        print_mode(m)
        sleep_ms(180)                # debounce
    last_btn = now

    # Read pots → map to duty
    d1 = to_duty(pot1.read())   # POT1 controls LED1
    d2 = to_duty(pot2.read())   # POT2 controls LED2

    # Apply current mode
    if m == 1:          # both direct
        led1.duty(d1);        led2.duty(d2)
    elif m == 2:        # LED1 inverted, LED2 direct
        led1.duty(inv(d1));   led2.duty(d2)
    elif m == 3:        # LED1 direct, LED2 inverted
        led1.duty(d1);        led2.duty(inv(d2))
    else:               # m == 4: both inverted
        led1.duty(inv(d1));   led2.duty(inv(d2))


    sleep_ms(30)