#!/usr/bin/env python3

import configparser
import argparse

class TaxRates:
 def __init__(self, config = "einkommenssteuer.ini"):
  self.rates = {}

  if config:
   self.read_file(config)

 def read_file(self, config, replace = True):
  if replace:
   self.rates = {}

  parser = configparser.ConfigParser()
  parser.read(config)

  levels = [level for level in parser.sections() if level.startswith("tax")]
  
  for level in levels:
   self.add_rate(parser[level]["above"], parser[level]["rate"])

 def add_rate(self, above, rate):
  self.rates[int(above)] = int(rate)

 def get_taxes(self, income):
  taxes = 0
  ratelist = list(self.rates.items())

  for rate in range(len(ratelist)):
   running = None

   try:
    if income > ratelist[rate + 1][0]:
     running = ratelist[rate + 1][0] - ratelist[rate][0]
   except:
    pass

   running = running or (income - ratelist[rate][0])

   if running < 0:
    break

   taxes += running / 100 * ratelist[rate][1]

  return taxes

def get_taxes(income):
 return TaxRates().get_taxes(income)

if __name__ == "__main__":
 parser = argparse.ArgumentParser()
 parser.add_argument("income", help="income to calculate taxes for", type=float)
 args = parser.parse_args()

 print(get_taxes(args.income))