espago/espago

# frozen_string_literal: true

require 'forwardable'
module Espago
  class SecureWebPage
    attr_accessor :production

    def self.calculate_checksum(app_id, kind, session_id, amount, currency, ts, service_client_id, checksum_key)
      return Digest::MD5.hexdigest(
        [app_id.to_s, kind, session_id.to_s, amount.to_s, currency.to_s, ts.to_s, checksum_key.to_s].join('|')
      ) if service_client_id.blank?
      Digest::MD5.hexdigest(
        [app_id.to_s, kind, session_id.to_s, amount.to_s, currency.to_s, ts.to_s, service_client_id.to_s, checksum_key.to_s].join('|')
      )
    end

    def self.form_post(_api_v = nil)
      Espago.production ? 'https://secure.espago.com/secure_web_page' : 'https://sandbox.espago.com/secure_web_page'
    end

    def self.prepare_form(data)
      data[:kind] ||= 'sale'
      data[:ts] ||= Time.now.to_i
      data[:app_id] ||=  Espago.app_id
      data[:api_version] ||= Espago.api_version
      data[:amount] = format('%.2f', data[:amount])
      data[:checksum] = calculate_checksum(data[:app_id], data[:kind], data[:session_id], data[:amount], data[:currency], data[:ts], data[:service_client_id], data[:checksum_key] || Espago.checksum_key)
      data
    end
  end
end