class OffsitePayments::Integrations::Gestpay::Helper

def currency=(currency_code)
  code = CURRENCY_MAPPING[currency_code]
  raise ActionViewHelperError, "Invalid currency code #{currency_code} specified" if code.nil?
  add_field(mappings[:currency], code)
end

def customer(params = {})
  add_field(mappings[:customer][:email], params[:email])
  add_field('PAY1_CHNAME', "#{params[:first_name]} #{params[:last_name]}")
end

def encryption_query_string
  fields = ['PAY1_AMOUNT', 'PAY1_SHOPTRANSACTIONID', 'PAY1_UICCODE']
  encoded_params = fields.collect{ |field| "#{field}=#{CGI.escape(@fields[field])}" }.join(DELIMITER)
  "#{ENCRYPTION_PATH}?a=" + CGI.escape(@fields['ShopLogin']) + "&b=" + encoded_params + "&c=" + CGI.escape(VERSION)
end

def form_fields
  @encrypted_data ||= get_encrypted_string
  {
    'a' => @fields['ShopLogin'],
    'b' => @encrypted_data
  }
end

def get_encrypted_string
  response = ssl_get(Gestpay.service_url, encryption_query_string)
  parse_response(response)
rescue GestpayEncryptionResponseError => e
  raise ActionViewHelperError.new(e)
end

def initialize(order, account, options = {})
  super
  add_field('PAY1_IDLANGUAGE', 2)
end