#' Bulma Document Renderer
#'
#' @inheritDotParams rmarkdown::html_document_base
#' @export
bulma_document <- function(
  ...,
  css = NULL,
  fig_width = 10,
  fig_height = 7,
  fig_retina = 2,
  keep_md = FALSE,
  dev = "png",
  pandoc_args = NULL,
  extra_dependencies = NULL
) {
  css_files <- c(
    "--css", bulma_file("bulma", "bulma.0.7.2.min.css"))

  if (!is.null(css)) {
    for (css_file in css) {
      css_files <- c(css_files, "--css", css_file)
    }
  }
  # rmarkdown::html_document_base(
    # pandoc_args = c(
    #   css_files,
    #   pandoc_args,
    #   "--template",
    #   system.file("bulma", "bulma.html", package="bulma")
    # ),
  #   ...
  # )
  deps <- htmltools::htmlDependency(
      name = "bulma",
      version = "0.7.2",
      src = bulma_file("bulma"),
      stylesheet = "bulma.0.7.2.min.css"
    )
  extra_dependencies <- append(extra_dependencies, list(deps))

  # preprocessor ----
  pre_processor <- function(metadata, input_file, runtime, knit_meta, files_dir, output_dir) {
    # browser()
  }

  rmarkdown::output_format(
    knitr = rmarkdown::knitr_options_html(
      fig_width, fig_height, fig_retina, keep_md, dev
    ),
    pandoc = rmarkdown::pandoc_options(
      to = "html",
      from = "markdown+ascii_identifiers+tex_math_single_backslash",
      args = c(
        css_files,
        pandoc_args,
        "--template",
        bulma_file("bulma", "bulma.html")
      ),
    ),
    pre_processor = pre_processor,
    clean_supporting = TRUE,
    base_format = rmarkdown::html_document_base(
      self_contained = TRUE, template = NULL,
      pandoc_args = pandoc_args,
      extra_dependencies = extra_dependencies
    )
  )
}


bulma_file <- function(...) {
  system.file(..., package = "bulma")
}