#@include core

# TODO refactor this
which_get_loader(){
  if ! exists curl ; then
    if ! exists wget ; then
      warn "Please install curl or wget"
      return 1
    else
      echo "wget -q -O-"
    fi
  else
    echo "curl -L -s"
  fi
  return 0
}

which_head_loader(){
  if ! exists curl ; then
    if ! exists wget ; then
      warn "Please install curl or wget"
      return 1
    else
      echo "wget -O- --spider -S -q"
    fi
  else
    echo "curl -L -I -s"
  fi
  return 0
}

http_get(){
    eval "$(which_get_loader)" "${1?please provide url}"
}
http_head(){
    eval "$(which_head_loader)" "${1?please provide url}" 2>&1
}

internet(){
    secret=$(http_get http://krebsco.de/secret 2>/dev/null)
    if [ "$secret" = "1337" ]; then
        return 0
    else
        echo "cannot load secret or secret incorrect" >&2
        return 1
    fi
}

which_telnet(){
  # find Telnet or similar and executes it at the end
  # requires exist
  # if env TELNET is set, will be trying to run this 
  # Tries the following things:
  #     telnet
  #     nc
  #     netcat
  #     busybox telnet
  if [ -e "${TELNET:-does_not_exist}" ]; then
    info "Will be using $TELNET as Telnet Client"
    echo $TELNET
  elif exists telnet ;then
    command -v telnet
  elif exists nc ;then
    command -v nc
  elif exists netcat;then
    command -v netcat
  elif exists busybox;then
    echo  `command -v busybox` telnet
  else
    die 'Cannot find telnet binary, please install either telnet-client or busybox or netcat or provided TELNET environment.'
  fi
}

run_telnet(){
  host="$1"
  port="$2"
  $(which_telnet) "$host" "$port"
}
port_open(){
  # $1 - host
  # $2 - port
  #  nc -zw 2 $1 $2
  echo | run_telnet "$1" "$2" & pid=$!
  { sleep 5; kill $pid;} & wid=$!
  wait $pid 
  RET=$?
  kill $wid >/dev/null 2>&1
  return $RET
}

send_irc(){
  ## reads from stdin, writes to IRC
  ##
  ## requires func: exists() anytelnet()
  if [ -z "${HOSTN:-}" ]; then
    HOSTN="$(get_hostname)"
    info "no HOSTN given, using $HOSTN instead"
  fi
  IRCCHANNEL=${IRCCHANNEL:-"#krebs_incoming"}
  IRCSERVER=${IRCSERVER:-"irc.freenode.net"}
  IRCPORT=${IRCPORT:-6667}
  NICK="${HOSTN}_$(head /dev/urandom | tr -dc "0123456789" | head -c3)"
  info "starting irc connect as $NICK"
  (   echo "NICK $NICK";
      echo "USER $NICK $IRCSERVER bla : $NICK";
      echo "JOIN $IRCCHANNEL";
      sleep 23;
      while read line; do echo "PRIVMSG $IRCCHANNEL :$line";sleep 1;done
      sleep 5; ) | run_telnet $IRCSERVER $IRCPORT 2>/dev/null
}