dominicsayers/foreplay

module Foreplay
  class Engine
    module Port
      include Foreplay

      def host
        return @host if @host
        @host, _p = server.split(':') # Parse host + port
        @host
      end

      def name
        @name ||= instructions['name']
      end

      def current_port
        @current_port ||= port_details['current_port']
      end

      def current_service
        @current_service ||= port_details['current_service']
      end

      # Not apparently used
      #- def former_port
      #-   @former_port ||= port_details['former_port']
      #- end

      def former_service
        @former_service ||= port_details['former_service']
      end

      def current_port_file
        @current_port_file ||= ".foreplay/#{name}/current_port"
      end

      def port_steps
        @port_steps ||= [
          {
            'command' => "mkdir -p .foreplay/#{name} && touch #{current_port_file} && cat #{current_port_file}",
            'silent' => true
          }
        ]
      end

      def current_port_remote
        return @current_port_remote if @current_port_remote

        @current_port_remote = Foreplay::Engine::Remote
                               .new(server, port_steps, instructions)
                               .__send__(mode)
                               .strip
                               .to_i

        if @current_port_remote.zero?
          message = 'No instance is currently deployed'
          @current_port_remote = DEFAULT_PORT + PORT_GAP
        else
          message = "Current instance is using port #{@current_port_remote}"
        end

        log message, host: host
        @current_port_remote
      end

      def port_details
        return @port_details if @port_details

        cp      = current_port_remote
        port    = instructions['port'].to_i
        ports   = [port + PORT_GAP, port]
        cp, fp  = cp == port ? ports : ports.reverse

        @port_details = {
          'current_port'    => cp,
          'current_service' => "#{name}-#{cp}",
          'former_port'     => fp,
          'former_service'  => "#{name}-#{fp}"
        }
      end
    end
  end
end