#!/usr/bin/env bash

###
# argument parser for parsing arguments
##

declare -A opts

while (( $# )); do
  case $1 in
  --*=*)
    key=${1#--} key=${key%%=*}
    opts[$key]=${1#--*=}
    ;;
  --no-*)
    key=${1#--no-}
    opts[$key]=no
    ;;
  --)
    shift
    break
    ;;
  --*)
    key=${1#--}
    opts[$key]=yes
    ;;
  *)
    break
  esac

  shift
done

###
# default config
##

server=${opts[server]:-irc.libera.chat}
tls=${opts[tls]:-no}

if [[ $tls = yes ]]; then
  if ! hash socat 2>/dev/null; then
    printf 'please install socat to use tls with rowbot.\n' >&2
    exit 1
  fi

  port=${opts[port]:-6697}
else
  port=${opts[port]:-6667}
fi

###
# net code
###

if [[ $tls = yes ]]; then
  coproc sock { socat OPENSSL:"$server":"$port" -; }
  in_sock=${sock[0]} out_sock=${sock[1]}
else
  exec {sock}<>/dev/tcp/"$server"/"$port"
  in_sock=$sock out_sock=$sock
fi

send() {
  local fmt
  printf -v fmt "$1" "${@:2}"
  printf '%s\r\n' "$fmt" >&"$out_sock"
}

recv() {
  declare -n sock_line=$1
  IFS= read -r "$1" <&"$in_sock"
  sock_line=${sock_line%$'\r'}
}

###
# driver
###

while recv line; do
  declare -p line
done