#' stackedbarplot UI Function
#'
#' @description A shiny Module.
#'
#' @param id,input,output,session Internal parameters for {shiny}.
#'
#' @noRd 
#'
#' @importFrom shiny NS tagList 
mod_stackedbarplot_ui <- function(id){
  ns <- NS(id)
  tagList(
    shinycssloaders::withSpinner(
      type = 5,
      hide.ui=F,
      plotly::plotlyOutput(ns("stabarplot"))
    )
  )
}
    
#' stackedbarplot Server Functions
#'
#' @noRd 
mod_stackedbarplot_server <- function(id, dat, ttl, cptn="Source: Download from SAP", ny=2000000){
  moduleServer( id, function(input, output, session){
    ns <- session$ns
    output$stabarplot<- plotly::renderPlotly({
      pl<-ggplot(dat, aes(x=name, y=amount, fill=bp_category, label=paste0(round(amount/1000000,1)," M")))+
        geom_col(position="stack")+
        geom_text(col="black", size=3, angle = 45, position = position_stack(vjust = 0.5),check_overlap = TRUE)+
        scale_y_continuous(labels = unit_format(unit = "M", scale = 1e-6))+
        labs(title=ttl,
             subtitle = "",
             y="amount",
             x="",
             caption=cptn)+
        theme_classic()+
        theme(
          legend.position="bottom"
        )
      ggplotly(pl)
    })
 
  })
}
    
## To be copied in the UI
# mod_stackedbarplot_ui("stackedbarplot_ui_1")
    
## To be copied in the server
# mod_stackedbarplot_server("stackedbarplot_ui_1")