module FFaker::Bank

def card_expiry_date(year_range: 5, year_latest: -5, format: '%m/%y')
  FFaker::Time.date({ year_range: year_range, year_latest: year_latest }).strftime(format)
end

def card_number
  FFaker.numerify('#### #### #### ####')
end

def card_type
  fetch_sample(CARD_TYPES)
end

def check_country_existence(country_code)
  return if COUNTRIES.keys.include?(country_code.upcase)
  raise ArgumentError, "Unexpected country code: '#{country_code}'"
end

def formatify_iban(code)
  FFaker.bothify(code).upcase
end

def iban(country_code: nil)
  return formatify_iban(fetch_sample(COUNTRIES.values)) unless country_code
  check_country_existence(country_code)
  formatify_iban(COUNTRIES[country_code.upcase])
end