#! /usr/bin/env Rscript
library(sass)
library(fs)
library(purrr)
library(cliapp)

render_sass <- function(file, output = NULL, outdir = "dist") {
  if (is.null(output)) {
    output <- path_file(file)
    path_ext(output) <- "rstheme"
  }
  output <- path(outdir, output)
  cli_alert_success("{path {path_rel(file, getwd())}}")
  sass(sass_file(paste(file)), output = output)
}

dir_create("dist")

cli_alert_info("Compiling themes...")
dir_ls("src", regexp = "^[^_].+\\.scss") %>%
  walk(render_sass)

get_theme_name <- function(file) {
  x <- readLines(file, warn = FALSE)
  x <- grep("rs-theme-name", x, value = TRUE)
  if (!length(x)) return("")
  x <- sub("^\\s*/\\*\\s*rs-theme-name:\\s", "", x)
  x <- sub("\\s*\\*/\\s*$", "", x)
  x
}

cp_to_rstudio <- function(file) {
  cli_alert("{arg \"{get_theme_name(file)}\"}")
  file_copy(
    file, 
    path_home_r(".R", "rstudio", "themes", path_file(file)),
    overwrite = TRUE
  )
}

cli_alert_info('Installing themes to {path {path_home_r(".R", "rstudio", "themes")}}')
dir_ls("dist", regexp = "\\.rstheme") %>%
  walk(cp_to_rstudio)

cli_alert_info("Use {code {fun rstudioapi::applyTheme}} to enable the above themes")