# frozen_string_literal: true

module SecureNative
  class RequestUtils
    SECURENATIVE_COOKIE = '_sn'
    SECURENATIVE_HEADER = 'x-securenative'

    def self.get_secure_header_from_request(headers)
      begin
        return headers[SECURENATIVE_HEADER] unless headers.nil?
      rescue StandardError
        []
      end
      []
    end

    def self.get_client_ip_from_request(request, options = nil)
      begin
        return request.ip unless request.ip.nil?
      rescue NoMethodError
      end

      begin
        x_forwarded_for = request.env['HTTP_X_FORWARDED_FOR']
        return x_forwarded_for.scan(/\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b/)[0] unless x_forwarded_for.nil?
      rescue NoMethodError
        begin
          x_forwarded_for = request['HTTP_X_FORWARDED_FOR']
          return x_forwarded_for.scan(/\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b/)[0] unless x_forwarded_for.nil?
        rescue NoMethodError
        end
      end

      begin
        x_forwarded_for = request.env['REMOTE_ADDR']
        return x_forwarded_for.scan(/\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b/)[0] unless x_forwarded_for.nil?
      rescue NoMethodError
        begin
          x_forwarded_for = request['REMOTE_ADDR']
          return x_forwarded_for.scan(/\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b/)[0] unless x_forwarded_for.nil?
        rescue NoMethodError
        end
      end

      unless options.nil?
        for header in options.proxy_headers do
          begin
            h = request.env[header]
            return h.scan(/\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b/)[0] unless h.nil?
          rescue NoMethodError
            begin
              h = request[header]
              return h.scan(/\b(?:[0-9]{1,3}\.){3}[0-9]{1,3}\b/)[0] unless h.nil?
            rescue NoMethodError
            end
          end
        end
      end

      ''
    end

    def self.get_remote_ip_from_request(request)
      begin
        request.remote_ip
      rescue NoMethodError
        ''
      end
    end
  end
end