local diary_open = function(opts)
  local date = opts.args ~= '' and opts.args or os.date('%Y-%m-%d')
  local year, month = date:match('(%d%d%d%d)-(%d%d)')
  local file = string.format('~/.diary/asciidoc/%s/diary-%s-%s.adoc', year, year, month)
  print("file is:", file)
  vim.cmd('e ' .. file)
  vim.cmd('normal! G')

  -- NOTE.2025-06-08 [1] and [2] should be replaced with snippet name, but I
  -- don't know how -- neither do grok nor chatgpt ...
  local snips = require('luasnip')
  local asnippets = snips.get_snippets('asciidoc')
  if vim.fn.getfsize(file) == 0 then
    snips.snip_expand(asnippets[1])
    vim.cmd('normal! G')
  end

  vim.cmd('normal! 3o') -- insert some newlines before new entry
  snips.snip_expand(asnippets[2])
end

vim.api.nvim_create_user_command("Diary", diary_open, { nargs = '?' })