# <%= app_name.camelize %>
module <%= app_name.camelize %>
  class << self
    # Configure
    #
    # @param block [Proc] the configuration options
    # @raise [NoMethodError] when new options are inside configuration block
    # @return [<%= app_name.camelize %>::Configuration] the configuration
    def configure(&block)
      yield @config ||= <%= app_name.camelize %>::Configuration.new
    rescue NoMethodError => e
      add_new_attribute_from_exception e
    end

    # Configuration object
    #
    # @return [<%= app_name.camelize %>::Configuration] the configuration object
    def config
      @config ||= <%= app_name.camelize %>::Configuration.new
    end

    # Add new attribute in configuration block
    #
    # @param e [NoMethodError] the exception
    # @return [void]
    def add_new_attribute_from_exception(e)
      method = e.name.to_s.gsub(/=$/, '')
      @config.extend Virtus.model
      @config.attribute method.to_sym, String, default: e.args.first
      @config.send(e.name, e.args.first)
    end
  end

  # Configuration
  class Configuration
    include Virtus.model

    attribute :active,   Boolean,                default: true
    attribute :log_file, String
    attribute :options,  Hash[Symbol => String], default: {}

    # Set custom default values
    #
    # @param args [Array] the attributes
    # @return [void]
    def initialize(*args)
      super
      # Bug - Update some default values
      @log_file = <%= app_name.camelize %>.env + '.log'
    end

    # Configuration
    #
    # @return [<%= app_name.camelize %>::Configuration] the configuration
    def config
      <%= app_name.camelize %>.config
    end
  end
end