# Copyright (c) 2020 Contrast Security, Inc. See https://www.contrastsecurity.com/enduser-terms-0317a for more details.
# frozen_string_literal: true

cs__scoped_require 'monitor'

module Contrast
  module Components
    module ContrastService
      # A wrapper build around the Common Agent Configuration project to allow
      # for access of the values contained in its
      # parent_configuration_spec.yaml.
      # Specifically, this allows for querying the state of the connection to
      # the Service, as well as sending a message to the Service.
      class Interface
        include Contrast::Components::ComponentBase
        include Contrast::Components::Interface

        DEFAULT_SERVICE_LOG = 'contrast_service.log'
        # The Rails ActionDispatch regexp for localhost IP + literal localhost
        # https://github.com/rails/rails/blob/master/actionpack/lib/action_dispatch/http/request.rb#L32
        LOCALHOST = Regexp.union [/^127\.\d{1,3}\.\d{1,3}\.\d{1,3}$/, /^::1$/, /^0:0:0:0:0:0:0:1(%.*)?$/, /^localhost$/]

        access_component :agent, :config

        def use_bundled_service?
          # Validates the config to decide if it's suitable for starting
          # the bundled service
          @_use_bundled_service ||= begin
                                      # Requirement says "must be true" but that
                                      # should be "must not be false" -- oops.
                                      !false?(CONFIG.root.agent.start_bundled_service) &&
                                          # Either a valid host or a valid socket
                                          # Path validity is the service's problem
                                          (LOCALHOST.match?(host) || !!socket_path)
                                    end
        end

        def host
          @_host ||= (CONFIG.root.agent.service.host || Contrast::Configuration::DEFAULT_HOST).to_s
        end

        def port
          @_port ||= (CONFIG.root.agent.service.port || DEFAULT_PORT).to_i
        end

        def socket_path
          @_socket_path ||= CONFIG.root.agent.service.socket
        end

        def use_tcp?
          socket_path.nil?
        end

        def logger_path
          @_logger_path ||= CONFIG.root.agent.service.logger.path || DEFAULT_SERVICE_LOG
        end

        private

        def disabled?
          @_disabled = false?(CONFIG.root.agent.start_bundled_service) if @_disabled.nil?
          @_disabled
        end
      end

      COMPONENT_INTERFACE = Interface.new
    end
  end
end