require 'base64'
require 'hiera/backend/eyaml/encrypthelper'

class Hiera
  module Backend
    module Eyaml
      class Encryptor
        class << self
          attr_accessor :options, :tag
        end

        def self.find(encryption_scheme = nil)
          encryption_scheme = Eyaml.default_encryption_scheme if encryption_scheme.nil?
          require "hiera/backend/eyaml/encryptors/#{File.basename encryption_scheme.downcase}"
          encryptor_module = Module.const_get(:Hiera).const_get(:Backend).const_get(:Eyaml).const_get(:Encryptors)
          encryptor_class = Utils.find_closest_class parent_class: encryptor_module, class_name: encryption_scheme
          if encryptor_class.nil?
            raise StandardError,
                  "Could not find hiera-eyaml encryptor: #{encryption_scheme}. Try gem install hiera-eyaml-#{encryption_scheme.downcase} ?"
          end

          encryptor_class
        end

        def self.encode(binary_string)
          Base64.strict_encode64(binary_string)
        end

        def self.decode(string)
          Base64.decode64(string)
        end

        def self.encrypt *_args
          raise StandardError, "encrypt() not defined for encryptor plugin: #{self}"
        end

        def self.decrypt *_args
          raise StandardError, "decrypt() not defined for decryptor plugin: #{self}"
        end

        def self.plugin_classname
          to_s.split('::').last.downcase
        end

        def self.register
          Hiera::Backend::Eyaml::Plugins.register_options options: options, plugin: plugin_classname
        end

        def self.option(name)
          Eyaml::Options["#{plugin_classname}_#{name}"] || options["#{plugin_classname}_#{name}"]
        end

        def self.hiera?
          Utils.hiera?
        end

        def self.format_message(msg)
          "[eyaml_#{plugin_classname}]:  #{msg}"
        end

        def self.trace(msg)
          LoggingHelper.trace from: plugin_classname, msg: msg
        end

        def self.debug(msg)
          LoggingHelper.debug from: plugin_classname, msg: msg
        end

        def self.info(msg)
          LoggingHelper.info from: plugin_classname, msg: msg
        end

        def self.warn(msg)
          LoggingHelper.warn from: plugin_classname, msg: msg
        end
      end
    end
  end
end