how to pass a reactiveValues to conditionalPanel? First attempt, not working

server.R

# server.R

shinyServer(
  function(input, output) {

    values <- reactiveValues(cond = 0)

    observe({ 
      if(is.null(input$action) || input$action == 0){return()} 
      values$cond <- isolate(1-values$cond) # switch between 0 and 1
    }) 

    output$debug <- renderPrint({
        #return(invisible())
        print(paste0("values$cond = ", print(values$cond)))
        print(paste0("input$action = ", print(input$action)))
    })

    output$plot <- renderPlot({
        hist(runif(1000))
    })

})

ui.R

# ui.R

shinyUI(
  fluidPage(
    title = "conditionalPanel demo"
    ,
    wellPanel(h5("Debug:"),textOutput("debug"))
    ,
    actionButton(inputId = "action", label = "Something Else Please")
    , br(), br()
    ,
    wellPanel(
      conditionalPanel(condition = "values.cond == 0" # pass reactiveValues values$cond
        , tabsetPanel(
            tabPanel("Plot1", plotOutput("plot"), value = 11)
            , 
            tabPanel("Plot2", "Nothing Here", value = 12)
          , id = "tabsetPanel1"
          , selected = 11
        )
      )
    )
    ,
    wellPanel(
      conditionalPanel(condition = "values.cond == 1" # pass reactiveValues values$cond
        , tabsetPanel(
            tabPanel("Something Else", "Not Much", value = 21)
            ,
            tabPanel("Something Else Altogether", "Not Much More", value = 22)
          , id = "tabsetPanel2"
          , selected = 22
        )
      )
    )
  )
)