#' @title Bulma Level
#' @examples
#' bulma_level("Home", "Menu", "Bulma", "Reservations", "Contact")
#' bulma_level("Tweets" = 3456, Following = 123, Followers = "456K", Likes = 789, style = "header")
#' @export
bulma_level <- function(
  ...,
  left = NULL,
  right = NULL,
  is_mobile = TRUE,
  style = "item"
) {
  level_item_f <- switch(
    match.arg(style, c("item", "header")),
    item = level_item,
    header = level_item_header
  )
  htmltools::tags$div(
    class = paste("level", if (is_mobile) "is-mobile"),
    level_side(left),
    level_item_f(...),
    level_side(right)
  )
}

level_item <- function(...) {
  x <- apply_tag(..., tag = "div", class = "level-item")
  tagList(x)
}

level_side <- function(x, side = "left") {
  if (is.null(x)) return(NULL)
  match.arg(side, c("left", "right"))
  lapply(x, function(item) {
    htmltools::tags$div(
      class = paste0("level-", side),
      level_item(x)
    )
  })
}

#' @title Bulma Level Items With Headers
level_item_header <- function(..., item_class = "has-text-centered", heading_class = NULL, title_class = NULL) {
  items <- list(...)
  x <- mapply(level_item_header_, names(items), items,
         MoreArgs = list(item_class = item_class,
                         heading_class = heading_class,
                         title_class = title_class),
         SIMPLIFY = FALSE)
  tagList(x)
}

#' @importFrom htmltools tag
level_item_header_ <- function(item_name, item_body, item_class = NULL, heading_class = NULL, title_class = NULL) {
  tag("div", list(
    class = paste("level-item", item_class),
    list(tag("div", list(
      tag("p", list(class = paste("heading", heading_class), item_name)),
      tag("p", list(class = paste("title", title_class), item_body))
    )))
  ))
}