local M = {}

---@param tbl table
---@param path string
local function get_nested_value(tbl, path)
  for key in string.gmatch(path, "[^%.]+") do
    if tbl and tbl[key] then
      tbl = tbl[key]
    else
      return nil
    end
  end
  return tbl
end

---@param str string
---@param tbl table
---@return string
function M.template(str, tbl)
  return (
    string.gsub(str, "${(.-)}", function(path)
      local value = get_nested_value(tbl, path)
      return value and tostring(value) or "${" .. path .. "}"
    end)
  )
end

---@param name string filename to save extra
---@param contents string file contents (extra theme)
function M.write(name, contents)
  print("writing extra/" .. name)
  vim.fn.mkdir(vim.fs.dirname("extras/" .. name), "p")
  local file = io.open("extras/" .. name, "w")
  if file then
    file:write(contents)
    file:close()
  end
end

return M