#!/bin/sh
set -eu

generate_pw()
{
  local pw
  if command -v diceware >/dev/null; then
    words=4
    DICEWARE="$(diceware -n$words -d" " -s2 | sed -re "s,['\"],\\\\&,g")" \
    python3 - <<-_eof
	import os, random, string, shlex
	words = shlex.split(os.getenv('DICEWARE'))
	delims = random.choices(string.digits, k=${words}-1)
	for w, d in zip(words[:-1], delims[:len(words)-1]):
	  print(w, end=d)
	print(words[-1])
	_eof

  elif command -v pwgen >/dev/null; then
    pwgen -sy 32 1

  else
    dd if=/dev/random bs=32 count=1 | base64

  fi
}

PASSPW="$(generate_pw)"
X_SELECTION="${PASSWORD_STORE_X_SELECTION:-clipboard}"
echo -n "$PASSPW" | xclip -selection $X_SELECTION
export PASSWD_ESCAPED="$(echo $PASSPW | sed -e 's,",\\",g')"
exec vim -c 'set noshelltemp' -c '0read! echo -n "$PASSWD_ESCAPED"' -c 2d -n "$@"