import machine
import utime

# -----------------------------
# OUTPUT DEFINITIONS
# -----------------------------
led_onboard = machine.Pin(25, machine.Pin.OUT)

led_red    = machine.Pin(2, machine.Pin.OUT)
led_yellow = machine.Pin(3, machine.Pin.OUT)
led_green  = machine.Pin(4, machine.Pin.OUT)

# -----------------------------
# INITIAL STATES
# -----------------------------
led_onboard.value(1)  # turn on onboard LED
red_led_state = 0
yellow_led_state = 0
green_led_state = 0

led_red.value(red_led_state)
led_yellow.value(yellow_led_state)
led_green.value(green_led_state)

last_time = 0  # last interrupt time (ms)
DEBOUNCE_TIME = 20 # debounce time (ms)
# -----------------------------
# INPUT DEFINITIONS
# Buttons use PULL_DOWN configuration
# -----------------------------
btn1 = machine.Pin(5, machine.Pin.IN, machine.Pin.PULL_DOWN)
btn2 = machine.Pin(6, machine.Pin.IN, machine.Pin.PULL_DOWN)
btn3 = machine.Pin(7, machine.Pin.IN, machine.Pin.PULL_DOWN)

# -----------------------------
# IRQ Handler
# -----------------------------
def gpio_handler(pin):
    global red_led_state, yellow_led_state, green_led_state, last_time
    #now = utime.ticks_ms()
    # if less than DEBOUNCE_TIME since last press then ignore (bouncing) 
    #if utime.ticks_diff(now, last_time) < DEBOUNCE_TIME:
    #    return
    print(f"interrupt triggered on pin {pin}")
    #last_time = now
    #print(btn2.value())

    if pin == btn1:
        red_led_state ^= 1 # toggle the value
        led_red.value(red_led_state)
    elif pin == btn2:
        yellow_led_state ^= 1 # toggle the value
        led_yellow.value(yellow_led_state)
    else:
        green_led_state ^= 1 # toggle the value
        led_green.value(green_led_state)

def button_handler_new(pin):
    now = utime.ticks_ms()
    global red_led_state, last_time
    
    # if less than DEBOUNCE_TIME since last press → ignore (bouncing)
    if utime.ticks_diff(now, last_time) < DEBOUNCE_TIME:
        return
    
    print(btn1.value())
    # update last accepted interrupt time
    last_time = now
    
    # toggle LED (XOR)
    red_led_state ^= 1
    led_red.value(red_led_state)


# -----------------------------
# IRQ Definitions
# -----------------------------
btn1.irq(trigger=machine.Pin.IRQ_RISING, handler=gpio_handler)
btn2.irq(trigger=machine.Pin.IRQ_RISING, handler=gpio_handler)
btn3.irq(trigger=machine.Pin.IRQ_RISING, handler=gpio_handler)

print("Program started! Press buttons...")

# -----------------------------
# MAIN LOOP
# -----------------------------
while True:
    #print(btn1.value())
    utime.sleep(0.01)  # sleep

# -----------------------------
# EXIT SEQUENCE
# -----------------------------
#print("Finished!")

#led_onboard.value(0)
#led_red.value(0)
#led_yellow.value(0)
#led_green.value(0)