#!/usr/bin/env python3

import time
import sys
import serial


SERIAL_PORT = "/dev/cu.usbserial-A700e0gN"
SERIAL_SPEED = 9600
#SERIAL_SPEED = 19200
#SERIAL_SPEED = 115200


arduino = serial.Serial(port=SERIAL_PORT, baudrate=SERIAL_SPEED, timeout=.1)


def write_read(x):
	arduino.write(bytes(x,  'utf-8'))
	time.sleep(0.05)
	data = arduino.readline()
	return  data


def countdown(start: int):
	for i in range(start, -1, -1):
		arduino.write(bytes("CLS\r\n", 'utf8'))
		arduino.write(bytes("LINE 1\r\n", 'utf8'))
		arduino.write(bytes("ECHO Countdown\r\n", 'utf8'))
		arduino.write(bytes("LINE 2\r\n", 'utf8'))
		print(str(i))
		arduino.write(bytes("ECHO " + str(i) + "\r\n", 'utf8'))
		time.sleep(1)
	arduino.write(bytes("CLS\r\n", 'utf8'))
	arduino.write(bytes("LINE 2\r\n", 'utf8'))
	arduino.write(bytes("ECHO BOOM!!!\r\n", 'utf8'))


def main():
	while True:
		num = int(input("Enter a number (-1=exit): "))
		if num < 0:
			sys.exit(0)
		#arduino.write(bytes("CLS\r\n", 'utf8'))
		#arduino.write(bytes("LINE 1\r\n", 'utf8'))
		#arduino.write(bytes("ECHO Countdown\r\n", 'utf8'))
		# arduino.write(bytes("ECHO C " + str(num) + "\r\n", 'utf8'))
		countdown(num)


if __name__ == "__main__":
	try:
		main()
	except KeyboardInterrupt:
		print("^C", file=sys.stderr)