def print-fact [] {
  let username = {{#if flags.windows}}$env.USERNAME{{else}}$env.USER{{/if}}
  echo $"Hello (ansi purple_bold)($username)(ansi reset),
it's the (ansi purple_bold)(date now | format date '%d.%m.%Y')(ansi reset) at (ansi purple_bold)(date now | format date '%H:%M:%S')(ansi reset)
Did you know: (ansi purple_bold)(fact)(ansi reset)"
}

def fact [] {
  let cache_file = "{{dirs.data}}/facts.txt"
  if not ($cache_file | path exists) {
    touch $cache_file
  }
  mut all_facts = open $cache_file | lines

  if ($all_facts | length) < 4 {
    try {
      $all_facts = (fetch-facts | prepend $all_facts)
    } catch {|e|
      print -e $"Failed to refresh facts cache ($e)"
    }
  }
  $all_facts | skip 1 | str join "\n" | save -f $cache_file
  if ($all_facts | is-empty) {
    "I wasn't able to provide a fact." 
  } else {
    $all_facts | first
  }
}

def fetch-facts [num_facts: number = 10] {
  0..($num_facts) | par-each { http get https://uselessfacts.jsph.pl/api/v2/facts/random | get text }
}

print-fact