#!/bin/bash

# A pseudorandom password generator

LEN=16 # default length
SYMBOLS=true

gen_psw() {
  local len=$1
  local symbols=$2
  local charset="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"

  [[ $symbols == true ]] && charset="${charset}!@#$%^&*()_+{}|:<>?"

  psw=$(< /dev/urandom tr -dc "$charset" | head -c "$len")
  echo "$psw"
}

while [[ "$#" -gt 0 ]]; do
  case $1 in
    -l|--length) LEN="$2"; shift ;;
    -ns|--no-symbols) SYMBOLS=false ;;
    *) echo "Unknown flag: $1"; exit 1 ;;
  esac
  shift
done

PASSWORD=$(gen_psw "$LEN" "$SYMBOLS")
echo "$PASSWORD"

if command -v xclip &> /dev/null; then
  echo -n "$PASSWORD" | xclip -selection clipboard
  printf '%s\n' "Password has been copied." | dzen2 -p 1 -bg white -fg black -x -305 -y 50 -w 455 -h 50
fi