module OnnistuuFi

# File lib/onnistuu_fi.rb, line 26
def self.decode_response(options = {})
  @client_identifier = options.fetch(:client_identifier) { raise(ArgumentError, "missing client_identifier from the passed arguments") }
  @encryption_key = options.fetch(:encryption_key) { raise(ArgumentError, "missing encryption_key from the passed arguments") }

  signer = OnnistuuFi::Signer.new(@client_identifier, @encryption_key)

  OnnistuuFi::Response.new(options.fetch(:encrypted_data), options.fetch(:iv), signer).data
end

# File lib/onnistuu_fi.rb, line 9
def self.generate_form(options = {})
  @client_identifier = options.fetch(:client_identifier) { raise(ArgumentError, "missing client_identifier from the passed arguments") }
  @encryption_key = options.fetch(:encryption_key) { raise(ArgumentError, "missing encryption_key from the passed arguments") }

  signer = OnnistuuFi::Signer.new(@client_identifier, @encryption_key)
  fields = options.fetch(:fields)
  fields = fields.merge(customer: @client_identifier)

  if block_given?
    fields[:button] = yield
  else
    fields[:button] = "<button type='submit'>#{fields.fetch(:button_text, 'Sign')}</button>"
  end

  OnnistuuFi::Form.new(signer, fields).generate_html
end