from machine import Pin
from utime import sleep

class LED:

    """
    Simple abstraction for an LED connected to a GPIO pin.
    """
    
    def __init__(self, pin_no):
        self.pin = Pin(pin_no, Pin.OUT)
        self.pin_id = pin_no
        
    def get_pin_id(self):
        return self.pin_id    

    def on(self):
        self.pin.value(1)

    def off(self):
        self.pin.value(0)

    def toggle(self):
        self.pin.value(not self.pin.value())

    def blink(self, on_time, off_time, n):
        for _ in range(n):
            self.on()
            sleep(on_time)
            self.off()
            sleep(off_time)
    
    def __str__(self):
        return f'<led({self.get_pin_id()})>'

    def __repr__(self):
        return self.__str__()

# --------------------------------------------------
# LED INITIALIZATION
# --------------------------------------------------

led_red = LED(27)
led_violet = LED(14)
led_yellow = LED(12)
led_blue = LED(13)

leds = [led_red, led_violet, led_yellow, led_blue]
sleep(1)

# --------------------------------------------------
# BASIC GROUP OPERATIONS
# --------------------------------------------------


def all_on():
    for led in leds:
        led.on()

def all_off():
    for led in leds:
        led.off()

def going(leds):
    while True:
        for led in leds:
            all_off()
            led.on()
            sleep(0.15)

# going(leds)


def order():
    pattern = leds + leds[-2 : 0 : -1]
    going(pattern)
        
# order()

# --------------------------------------------------
# DATA-DRIVEN PATTERNS (not yet applied)
# --------------------------------------------------


patterns = [
    [1, 0, 0, 0],
    [0, 1, 0, 0],
    [0, 0, 1, 0],
    [0, 0, 0, 1],
]