text: #!/usr/bin/env python3
  
  import os
  import requests
  import sys
  
  def addStockItems(amount):
  	res = requests.post(
  		os.environ["API_URL"] + '/add-stock-items',
  		json=[{'balance': amount, 'id': 'cli-product', 'name': 'CLI product'}]
  	)
  
  	if res.status_code != 200:
  		print("🚨 Could not add stock items, API responded with " + res.status_code)
  		exit(1)
  
  	print("✅ Added " + str(amount) + " items")
  
  def checkCLIParams():
  	if len(sys.argv) == 1:
  		print('')
  		print('')
  		print('Usage:  sm [CMD][Amount]')
  		print('')
  		print('CMD:')
  		print('  I  "Inleverera"')
  		print('  S  "Sälj"')
  		print('  L  "Lager"')
  		print('')
  		print('Amount must be an integer.')
  		print('Amount is ignored if CMD is L.')
  		print('')
  		exit(0)
  
  	if len(sys.argv) != 2:
  		print("🚨 Exactly one command line argument is required")
  		exit(1)
  
  	cmd = sys.argv[1][0]
  	amount = sys.argv[1][1:]
  
  	if cmd != "S" and cmd != "I" and cmd != "L":
  		print("🚨 CMD must be S, I or L")
  		exit(1)
  
  	if (amount.isdigit() == False or amount == "0") and cmd != "L":
  		print("🚨 Amount must be a positive integer")
  		exit(1)
  
  def checkEnv():
  	if "API_URL" not in os.environ:
  		print("🚨 API_URL environment variable is required, but is not set", file = sys.stderr)
  		exit(1)
  
  def showStockAmount():
  	res = requests.get(os.environ["API_URL"] + '/stock-balances?ids[]=cli-product')
  	if res.status_code != 200:
  		print("🚨 Could not get stock items, API responded with " + res.status_code)
  		exit(1)
  
  	stockItems = res.json()
  	if "cli-product" in stockItems:
  		print(stockItems["cli-product"]["balance"])
  	else:
  		print(0)
  
  def subtractStockItems(amount):
  	res = requests.post(
  		os.environ["API_URL"] + '/subtract-stock-items',
  		json=[{'amount': amount, 'id': 'cli-product'}]
  	)
  
  	if res.status_code != 200:
  		print("🚨 Could not subtract stock items, API responded with " + res.status_code)
  		exit(1)
  
  	print("✅ Subtracted " + str(amount) + " items")
  