from machine import Pin
import time

# Pico onboard LED
led = Pin("LED", Pin.OUT)

# Button input with pullup
button = Pin(15, Pin.IN, Pin.PULL_UP)

# Shared state
interrupt_count = 0
press_count = 0
release_count = 0
event_pending = False

# Debounce timing
last_interrupt_ms = 0
DEBOUNCE_MS = 50


def button_isr(pin):
    global interrupt_count
    global press_count
    global release_count
    global event_pending
    global last_interrupt_ms

    now = time.ticks_ms()

    # Debounce
    if time.ticks_diff(now, last_interrupt_ms) < DEBOUNCE_MS:
        return

    last_interrupt_ms = now
    interrupt_count += 1

    if pin.value() == 0:
        press_count += 1
    else:
        release_count += 1

    event_pending = True


# Trigger on both edges
button.irq(
    trigger=Pin.IRQ_RISING | Pin.IRQ_FALLING,
    handler=button_isr
)

print("GPIO Interrupt Demo")
print("Press and release the button on GP15")

last_report = time.ticks_ms()

while True:

    # Process interrupt events outside ISR
    if event_pending:
        event_pending = False

        led.toggle()

        print(
            "Interrupts:",
            interrupt_count,
            "Presses:",
            press_count,
            "Releases:",
            release_count
        )

    # Periodic status report
    if time.ticks_diff(time.ticks_ms(), last_report) > 5000:
        last_report = time.ticks_ms()

        print("\n--- Status ---")
        print("Total interrupts:", interrupt_count)
        print("Press events:", press_count)
        print("Release events:", release_count)
        print("----------------")

    time.sleep_ms(10)