import time                                          #for time delay
import board                                         #for pin definitions
import digitalio                                     #for pin control
import pwmio

# LEDs Pinout             
L = [0,0,0,0]                         
#Create a list with 4 elements as a "container" to store LED objects later                                                                      

# To Declare the LEDs and button as PORT
LEDS = (board.GP0, board.GP1, board.GP2, board.GP3) 
#Define a tuple containing the specific GP pin numbers for the LEDs.
for i in range(4):
    L[i] = digitalio.DigitalInOut(LEDS[i])                 #Activate pin as DigitalIO object
    L[i].direction = digitalio.Direction.OUTPUT            #Set as OUTPUT mode

switch1 = digitalio.DigitalInOut(board.GP18)         # Activate GP18 pin as a digital IO object and name it 'switch'
switch1.direction = digitalio.Direction.INPUT        # Set as INPUT mode
switch1.pull = digitalio.Pull.DOWN                   # When switch is closed, it is represent by 0

switch2 = digitalio.DigitalInOut(board.GP19)         # Activate GP19 pin as a digital IO object and name it 'switch'
switch2.direction = digitalio.Direction.INPUT        
switch2.pull = digitalio.Pull.DOWN 

buzzer = pwmio.PWMOut(board.GP15, variable_frequency=True)

# Running Light
def running_light():
    for j in range(4):
        L[j].value = True #light on
        time.sleep(0.2)   #remain for 0.2s
        L[j].value = False # closed light
    
    for j in reversed(range(4)):  #from right to left
        L[j].value = True
        time.sleep(0.2)
        L[j].value = False

# Blink Light
def blink_light():
    for j in range(4):                             #Turn on all 4 LEDs simultaneously
        L[j].value = True
    time.sleep(0.5)
    for j in range(4):                             #Turn off all 4 LEDs simultaneously
        L[j].value = False
    time.sleep(0.5)

# OFF the Light
def off_light():
    for j in range(4):                             # Ensure all LEDs are False/OFF
        L[j].value = False

# Execution
while True:
    if switch1.value == True: 
        print("Task 1.1")
        for bl in range(5):
            blink_light()      # Blink Light
        buzzer.frequency = 1000   # beep frequency
        buzzer.duty_cycle = 32768 # sound
        time.sleep(0.2)           # beep for 0.2s
        buzzer.duty_cycle = 0     # stop beep
        time.sleep(0.5)
        off_light()            # OFF Light
        
    elif switch2.value == True :
        print("Task 1.2")
        for rl in range(5):
            running_light()    # Running Light
        time.sleep(0.5)
        off_light()            # OFF Light
        
    else:
        off_light()

    time.sleep(0.5)