# encoding: utf-8

module OneApm
  module Configuration
    module Autostart
      extend self

      def agent_should_start?
          !blacklisted_constants? &&
          !blacklisted_executables? &&
          !in_blacklisted_rake_task?
      end

      def blacklisted_constants?
        blacklisted?(OneApm::Agent.config[:'autostart.blacklisted_constants']) do |name|
          OneApm::LanguageSupport.constant_is_defined?(name)
        end
      end

      def blacklisted_executables?
        blacklisted?(OneApm::Agent.config[:'autostart.blacklisted_executables']) do |bin|
          File.basename($0) == bin
        end
      end

      def blacklisted?(value, &block)
        value.split(/\s*,\s*/).any?(&block)
      end

      def in_blacklisted_rake_task?
        tasks = begin
                  ::Rake.application.top_level_tasks
                rescue => e
                  ::OneApm::Agent.logger.debug("Not in Rake environment so skipping blacklisted_rake_tasks check: #{e}")
                  []
                end
        !(tasks & ::OneApm::Agent.config[:'autostart.blacklisted_rake_tasks'].split(/\s*,\s*/)).empty?
      end
    end
  end
end