# vyatta bash configuration mode completion

# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
# 
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# A copy of the GNU General Public License is available as
# `/usr/share/common-licenses/GPL' in the Debian GNU/Linux distribution
# or on the World Wide Web at `http://www.gnu.org/copyleft/gpl.html'.
# You can also obtain it by writing to the Free Software Foundation,
# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
# MA 02110-1301, USA.
# 
# Author: Vyatta
# Description: bash completion for Vyatta configuration commands
# 
# **** End License ****

# Turn on history logging
export HISTCONTROL=
export HISTFILESIZE=10000
export HISTSIZE=10000
export HISTTIMEFORMAT='%FT%T%z ' 
export PROMPT_COMMAND='history -a'

# remove colon from completion word seperators
export COMP_WORDBREAKS=${COMP_WORDBREAKS/:/}

builtin set histappend=1

# only do this if we are going into configure mode
if [ "$_OFR_CONFIGURE" != "ok" ]; then
  return 0
fi

if [ -r /etc/default/vyatta ]; then
  source /etc/default/vyatta
fi

declare -a op_functions
op_functions=( /opt/vyatta/share/vyatta-op/functions/interpreter/* )
for file in "${op_functions[@]}"; do
  source $file
done

declare -a cfg_functions
cfg_functions=( /opt/vyatta/share/vyatta-cfg/functions/interpreter/* )
for file in "${cfg_functions[@]}"; do
  source $file
done

#  readline bindings
case "$-" in
  *i*)
    bind 'set show-all-if-ambiguous on'
    if ! bind -p |grep -q '\\C-x\\C-t'; then
      bind '"\C-x\C-t": kill-region'
    fi
    if ! bind -p |grep -q '\\C-x\\C-o'; then
      bind '"\C-x\C-o": copy-region-as-kill'
    fi
  ;;
esac

# function for shell api
vyatta_cli_shell_api ()
{
  local noeval=''
  if [ "$1" == NOEVAL ]; then
    noeval=true
    shift
  fi
  local outstr
  if ! outstr=$(${vyatta_sbindir}/my_cli_shell_api -- "$@"); then
    # display the error output (if any) and then fail
    if [ -n "$outstr" ]; then
      echo "$outstr"
    fi
    return 1
  fi
  # eval the output (if any)
  if [ -n "$outstr" ]; then
    if [ -n "$noeval" ]; then
      echo "$outstr"
    else
      eval "$outstr"
    fi
  fi
  return 0
}

# set up the session environment
## note: this can not use vyatta_cli_shell_api() above since it "declares"
##       env vars.
eval "$(${vyatta_sbindir}/my_cli_shell_api getSessionEnv $$)"

declare is_set=0
declare last_idx=0
declare -a comp_words=()

# commands to unalias
declare -a unalias_cmds=( clear configure date debug edit exit load merge \
                          no run set show save terminal undebug up top )
for cmd in "${unalias_cmds[@]}"; do
  unalias $cmd >& /dev/null
done


### Top level command completions ###
# do op mode completion
vyatta_run_complete ()
{
  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  
  local cur=${COMP_WORDS[COMP_CWORD]}
  
  if [[ $COMP_CWORD -eq 0 ]]; then
    vyatta_config_complete "$@"
    eval $restore_shopts
    return
  fi

  COMP_WORDS=( "${COMP_WORDS[@]:1}" )
  (( COMP_CWORD -= 1 ))
  if [[ ${COMP_WORDS[0]} =~ "/" ]]; then
    _filedir_xspec
  else
    shopt -s extglob nullglob
    _vyatta_op_expand "$@"
  fi
  
  if [ -z "$cur" ] ||
     [[ "${COMPREPLY[0]}" =~ "$cur" ]]; then
    for comp ; do
      if [ -z "$comp" ] ; then
        if [ ${#COMPREPLY[@]} -eq 0 ] ; then
          COMPREPLY=( " " "" )
        elif _vyatta_cfg_compreply_needs_ambiguity ; then
          COMPREPLY+=( " " )
        fi  
      fi  
    done
  fi   
  
  eval $restore_shopts
}

vyatta_single_word_complete()
{
  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob

  if [[ $COMP_CWORD -eq 0 ]];then
    vyatta_config_complete "$@"
    eval $restore_shopts
    return
  fi

  echo -en "\nPossible completions:\n"
  echo -en "  <Enter>\tExecute the current command"
  COMPREPLY=( "" " " )

  eval $restore_shopts
}

vyatta_loadsave_complete()
{
  # Generate completion help for the "load" and "save" commands

  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob

  if [[ $COMP_CWORD -eq 0 ]];then
    vyatta_config_complete "$@"
    eval $restore_shopts
    return
  fi

  # Only provide completions after command name has been typed, but
  # before any characters of the command argument have been entered.
  # File name completion, and completion of the various URL formats
  # is not supported yet.
  #
  if [ $COMP_CWORD -eq 1 -a -z "${COMP_WORDS[1]}" ]; then
      local command=$(vyatta_cfg_expand_top_level ${COMP_WORDS[0]})
      echo
      echo "Possible completions:"
      if [ "$command" = "load" ]; then
	  echo -e "  <Enter>\t\t\t\tLoad from system config file"
	  echo -e "  <file>\t\t\t\tLoad from file on local machine"
	  echo -e "  scp://<user>:<passwd>@<host>/<file>\tLoad from file on remote machine"
	  echo -e "  ftp://<user>:<passwd>@<host>/<file>\tLoad from file on remote machine"
	  echo -e "  http://<host>/<file>\t\t\tLoad from file on remote machine"
	  echo -e "  tftp://<host>/<file>\t\t\tLoad from file on remote machine"
      elif [ "$command" = "merge" ]; then
	  echo -e "  <Enter>\t\t\t\tMerge from system config file"
	  echo -e "  <file>\t\t\t\tMerge from file on local machine"
	  echo -e "  scp://<user>:<passwd>@<host>/<file>\tMerge from file on remote machine"
	  echo -e "  ftp://<user>:<passwd>@<host>/<file>\tMerge from file on remote machine"
	  echo -e "  http://<host>/<file>\t\t\tMerge from file on remote machine"
	  echo -e "  tftp://<host>/<file>\t\t\tMerge from file on remote machine"
      elif [ "$command" = "save" ]; then
	  echo -e "  <Enter>\t\t\t\tSave to system config file"
	  echo -e "  <file>\t\t\t\tSave to file on local machine"
	  echo -e "  scp://<user>:<passwd>@<host>/<file>\tSave to file on remote machine"
	  echo -e "  ftp://<user>:<passwd>@<host>/<file>\tSave to file on remote machine"
	  echo -e "  tftp://<host>/<file>\t\t\tSave to file on remote machine"
      fi
      COMPREPLY=( "" " " )
  else
    echo -en "\nPossible completions:\n"
    echo -en "  <Enter>\tExecute the current command"
    COMPREPLY=( "" " " )
  fi

  eval $restore_shopts
}

vyatta_config_loadkey()
{
  # don't load if there are uncommitted changes.
  if vyatta_cli_shell_api sessionChanged; then
    echo "Cannot load: configuration modified."
    echo "Commit or discard the changes before loading a config file."
    return 1
  fi
  # return to top level.
  reset_edit_level
  ${vyatta_sbindir}/vyatta-load-user-key.pl "$@"
}

vyatta_loadkey_complete()
{
 
  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob
 
  if [[ $COMP_CWORD -eq 0 ]];then
    vyatta_config_complete "$@"
    eval $restore_shopts
    return
  fi

  case "$COMP_CWORD" in
      1) if [ -z "${COMP_WORDS[1]}" ]; then
	  COMPREPLY=( $(getent passwd | awk -F: '$7 == "/bin/vbash" { print $1}') )
	 else
	  COMPREPLY=( $(compgen -u -- ${COMP_WORDS[1]} ) )
         fi ;;
      2) if [ -z "${COMP_WORDS[2]}" ]; then
	  echo
	  echo "Possible completions:"
	  echo -e "  <file>\t\t\t\tLoad from file on local machine"
	  echo -e "  scp://<user>@<host>/<file>\tLoad from file on remote machine"
	  echo -e "  ftp://<user>@<host>/<file>\tLoad from file on remote machine"
	  echo -e "  http://<host>/<file>\t\t\tLoad from file on remote machine"
	  echo -e "  tftp://<host>/<file>\t\t\tLoad from file on remote machine"
	  COMPREPLY=( "" " " )
	 else
	  COMPREPLY=( $(compgen -f -- ${COMP_WORDS[2]} ) )
	 fi ;;
  esac
}

print_commit_log ()
{
  local -a array
  eval "array=($(${vyatta_sbindir}/vyatta-config-mgmt.pl --action=show-commit-log-brief))"
  local count=0
  for i in "${array[@]}"; do
     i=${i//_/ }
     echo -e "    $count\t$i"
     (( count++ ))
  done
}

vyatta_rollback_complete ()
{
  # Generate completion help for the "rollback" command

  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob

  if [[ $COMP_CWORD -eq 0 ]];then
    vyatta_config_complete "$@"
    eval $restore_shopts
    return
  fi

  # Only provide completions after command name has been typed, but
  # before any characters of the command argument have been entered.
  if [ $COMP_CWORD -eq 1 -a -z "${COMP_WORDS[1]}" ]; then
      echo
      echo "Possible completions:"
      echo -e "  <N>\tRollback to revision N (currently requires reboot)"
      echo -e "\n  Revisions:"
      print_commit_log
      COMPREPLY=( "" " " )
  else
      echo -en "\nPossible completions:\n"
      echo -en "  <Enter>\tExecute the current command"
      COMPREPLY=( "" " " )
  fi

  eval $restore_shopts
}

vyatta_compare_complete ()
{
  # Generate completion help for the "compare" command
  
  local current_prefix=$2
  local current_word=$3
  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob
  compopt -o nospace
  
  if [[ $COMP_CWORD -eq 0 ]];then
    vyatta_config_complete "$@"
    eval $restore_shopts
    return
  fi

  if [[ $DBG_CFG_COMPS -eq 1 ]];then
    echo "In commit complete"
    echo "args: '$@'"
    echo "comp_cword: '$COMP_CWORD'"
    echo "current_prefix: '$current_prefix'"
    echo "COMP_WORDS: '${COMP_WORDS[@]}'"
  fi

  # Only provide completions after command name has been typed, but
  # before any characters of the command argument have been entered.
  if [ $COMP_CWORD -eq 1 -a -z "${COMP_WORDS[1]}" ] ||
     [ $COMP_CWORD -eq 1 -a -z "$current_prefix" ]; then
      echo
      echo "Possible completions:"
      echo -e "  <Enter>\tCompare working & active configurations"
      echo -e "  saved\t\tCompare working & saved configurations"
      echo -e "  <N>\t\tCompare working with revision N"
      echo -e "  <N> <M>\tCompare revision N with M"
      echo -e "\n  Revisions:"
      print_commit_log
      COMPREPLY=( "" " " )
  elif [[ -n "$current_prefix" ]]  && 
       [[ "saved" =~ "$current_prefix" ]] &&
       [[ $COMP_CWORD -eq 1 ]]; then
      COMPREPLY=( "saved " )
      eval $restore_shopts
      return
  elif [ $COMP_CWORD -eq 2 -a -z "${COMP_WORDS[2]}" ]; then
      if [[ "saved" =~ "${COMP_WORDS[1]}" ]]; then
        echo -e "\nPossible completions:"
        echo -en "  <Enter>\tCompare working and saved configurations"
        COMPREPLY=( "" " " )
        eval $restore_shopts
        return
      fi
      echo
      echo "Possible completions:"
      echo -e "  <Enter>\tCompare working revision N"
      echo -e "  <M>\t\tCompare revision N with M"
      echo -e "\n  Revisions:"
      print_commit_log
      COMPREPLY=( "" " " )
  elif [ $COMP_CWORD -eq 1 ] &&
       [[ -n "$current_prefix" ]]; then
      COMPREPLY=( "$current_prefix " )
  else
      echo -en "\nPossible completions:\n"
      echo -en "  <Enter>\tExecute the current command"
      COMPREPLY=( "" " " )
  fi

  eval $restore_shopts
}

vyatta_commit_complete ()
{
  # Generate completion help for the "commit-confirm" command

  local current_prefix=$2
  local current_word=$3
  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob
  compopt -o nospace

  if [[ $COMP_CWORD -eq 0 ]];then
    vyatta_config_complete "$@"
    eval $restore_shopts
    return
  fi

  if [[ $DBG_CFG_COMPS -eq 1 ]];then
    echo "In commit complete"
    echo "args: '$@'"
    echo "comp_cword: '$COMP_CWORD'"
    echo "current_prefix: '$current_prefix'"
    echo "COMP_WORDS: '${COMP_WORDS[@]}'"
  fi

  # Only provide completions after command name has been typed, but
  # before any characters of the command argument have been entered.
  if [ $COMP_CWORD -eq 1 ] &&
     [[ -z "$current_prefix" ]]; then
      echo
      echo "Possible completions:"
      if [ "${COMP_WORDS[0]}" = "commit" ]; then
         echo -e "  <Enter>\tCommit working configuration"
      elif [ "${COMP_WORDS[0]}" = "commit-confirm" ]; then
         echo -e "  <Enter>\tCommit, rollback/reboot in 10 minutes if no confirm"
         echo -e "  <N>\t\tCommit, rollback/reboot in N minutes if no confirm"
      fi
      echo -e "  comment\tComment for commit log"
      COMPREPLY=( "" " " )
  elif [[ ( -n "$current_prefix" && "comment" =~ "${current_prefix}" ) ]] &&
       [[ $COMP_CWORD -eq 1 ]]; then
      COMPREPLY=( "comment " )
      eval $restore_shopts
      return
  elif [[ ( -n "${COMP_WORDS[1]}" && "comment" =~ "${COMP_WORDS[1]}" ) ]] &&
       [[ $COMP_CWORD -eq 2 ]]; then
      echo
      echo "Possible completions:"
      echo -e "  <txt>\tText comment for commit log (e.g. \"add user bob\")"
      COMPREPLY=( "" " " )
      eval $restore_shopts
      return
  elif [ $COMP_CWORD -eq 1 ];then
      COMPREPLY=$(compgen -W comment -- ${COMP_WORDS[$COMP_CWORD]})
  else
      echo -en "\nPossible completions:\n"
      echo -en "  <Enter>\tExecute the current command"
      COMPREPLY=( "" " " )
  fi

  eval $restore_shopts
}
### End Top level command completions ###

declare vyatta_cfg_help=""
declare vyatta_cfg_type=""
declare vyatta_cfg_tag=0
declare vyatta_cfg_multi=0
declare -a vyatta_cfg_allowed=()
declare vyatta_cfg_comp_help=""
declare -a vyatta_cfg_val_type=()
declare -a vyatta_cfg_val_help=()

declare -a _get_help_text_items=()
declare -a _get_help_text_helps=()
get_help_text ()
{
  vyatta_help_text="\\nPossible completions:"
  local print_node_type=$1
  local editlvl=$(cli-shell-api getEditLevelStr)
  local node=0;
  for (( idx = 0; idx < ${#_get_help_text_items[@]}; idx++ )); do
    vyatta_help_text+="\\n"
    if (( ${#COMP_WORDS[@]} < 2 )) ||
       [[ $COMP_CWORD -eq 0 ]]; then
      vyatta_help_text+="\\x20\\x20"
    else
      if [[ $print_node_type -ne 0 ]]; then
        local nodeType=$(cli-shell-api getNodeType ${editlvl} ${api_args[@]:1:$[${comp_cword}-1]} ${_get_help_text_items[idx]})
        case  "$nodeType" in
          tag) vyatta_help_text+="+> " ;;
          non-leaf) vyatta_help_text+=" > " ;;
          multi) vyatta_help_text+="+  " ;; 
          *) vyatta_help_text+="   " ;; 
        esac
        node=1;
      else
        vyatta_help_text+="\\x20\\x20"
      fi
    fi
    if [ ${#_get_help_text_items[idx]} -lt $((6 - $node)) ]; then
      vyatta_help_text+="${_get_help_text_items[idx]}\\t\\t"
    elif [ ${#_get_help_text_items[idx]} -lt 13 ]; then
      vyatta_help_text+="${_get_help_text_items[idx]}\\t"
    else
      vyatta_help_text+="${_get_help_text_items[idx]}\\n\\x20\\x20\\x20\\t\\t"
    fi
    vyatta_help_text+="${_get_help_text_helps[idx]}"
  done
  if [ -n "$vyatta_cfg_comp_help" ]; then
    local hstr=${vyatta_cfg_comp_help//\'/\'\\\\\\\'\'}
    vyatta_help_text+="\\n\\nDetailed information:\\n"
    local sIFS=$IFS
    IFS='
'
    local chstr=$(echo -en "$hstr\n" \
                  | while read comp_help_line; do
                      echo "vyatta_help_text+='  $comp_help_line\\n';"
                    done)
    eval "$chstr"
    IFS=$sIFS
  fi
}

get_value_format_string ()
{
  local vtype=$1
  if [[ $vtype = !* ]]; then
    echo -n '!'
    vtype="${vtype#!}"
  fi
  case "$vtype" in
    _*)
      echo -n "${vtype#_}"
      ;;
    txt)
      echo -n '<text>'
      ;;
    u32)
      echo -n '<0-4294967295>'
      ;;
    u32:*)
      echo -n "<${vtype##u32:}>"
      ;;
    range)
      echo -n "<start>-<end>"
      ;;
    ipv4)
      echo -n '<x.x.x.x>'
      ;;
    ipv6)
      echo -n '<h:h:h:h:h:h:h:h>'
      ;;
    ipv4net)
      echo -n '<x.x.x.x/x>'
      ;;
    ipv6net)
      echo -n '<h:h:h:h:h:h:h:h/x>'
      ;;
    ipv4range)
      echo -n '<x.x.x.x>-<x.x.x.x>'
      ;;
    ipv6range)
      echo -n '<h:h:h:h:h:h:h:h>-<h:h:h:h:h:h:h:h>'
      ;;
    bool)
      echo -n '<boolean>'
      ;;
    macaddr)
      echo -n '<h:h:h:h:h:h>'
      ;;
    *)
      echo -n "$vtype"
      ;;
  esac
}

declare -a vyatta_completions
declare -a vyatta_noncompletions
declare vyatta_help_text="\\nNo help text available"
declare vyatta_do_help=false
vyatta_do_complete ()
{
  compopt -o nospace
  local cur=''
  local current_prefix=$2
  local current_word=$3
  if (( ${#COMP_WORDS[@]} > 0 )); then
      cur=${COMP_WORDS[COMP_CWORD]}
  fi
  local -a f_comps=()
  # Get filtered word list, use the current comp word if current_word is empty
  # this only happens at the beginning of the line
  if [ -z "$current_word" ];then
    get_prefix_filtered_list "$cur" vyatta_completions f_comps
  else
    get_prefix_filtered_list "$current_prefix" vyatta_completions f_comps
  fi
  local estr="COMPREPLY=( "
  for w in "${f_comps[@]}"; do
    estr="$estr\"$w\" "
  done
  estr="${estr})"
  eval "$estr"
  # Apply ambiguity to the completion array
  # This is needed when we have an empty completion
  # and there is only one element of the completion array
  # This will maintain consistency with op mode completions
  if [ -z "$cur" ] ||
     [[ "${COMPREPLY[0]}" =~ "$cur" ]]; then
     for comp ; do
        if [ -z "$comp" ] ; then
          if [ ${#COMPREPLY[@]} -eq 0 ] ; then
            COMPREPLY=( " " "" )
          elif _vyatta_cfg_compreply_needs_ambiguity ; then
            COMPREPLY+=( " " )
          fi  
        fi  
      done
  fi 
  # If we didn't need ambiguity and there is only one element
  # in the compreply array then its the only available word,
  # append a space to finish the completion.
  if [ ${#COMPREPLY[@]} -eq 1 ]; then 
     COMPREPLY=( "${COMPREPLY[0]} " )
  fi
  if [ -z "$cur" ];then
    vyatta_do_help=true
  fi
  # don't show help text if its the same word 
  # keeps completions from getting stuck
  if [ ${#vyatta_completions[@]} -eq 1 ] &&
     [ -n "$cur" ] &&
     [[ "${vyatta_completions[0]}" =~ "$cur" ]]; then
    vyatta_do_help=false
  elif $vyatta_do_help ||
       [ ${#vyatta_completions[@]} -eq 0 ]; then
    printf "$vyatta_help_text" | ${VYATTA_PAGER:-cat}
    COMPREPLY=( "" " " )
  fi
  vyatta_help_text="\\nNo help text available"
}

_vyatta_cfg_compreply_needs_ambiguity ()
{
    local -a uniq

    [ ${#COMPREPLY[@]} -eq 1 ] && return

    uniq=( `printf "%s\n" "${COMPREPLY[@]}" | cut -c1 | sort -u` )

    [ ${#uniq[@]} -eq 1 ] && return
    false
}


vyatta_simple_complete ()
{
  # when this function is called, it is expected that:
  # * "vyatta_help_text" is filled with the help text.
  # * "vyatta_completions" is an array of "filtered" possible completions
  #   (i.e., only those starting with the current last component).
  local current_prefix=$2
  compopt -o nospace
  local cur=${COMP_WORDS[COMP_CWORD]}
  local -a f_comps=()
  get_prefix_filtered_list "$current_prefix" vyatta_completions f_comps
  if [[ ${#f_comps[@]} -ne 1 ]]; then
    f_comps=( $(printf "%s\n" "${f_comps[@]}" | sort -u) )
  fi

  COMPREPLY=( "${f_comps[@]}" )

  # Apply ambiguity to the completion array
  # This is needed when we have an empty completion
  # and there is only one element of the completion array
  # This will maintain consistency with op mode completions
  if [ -z "$current_prefix" ] ||
     [[ "${COMPREPLY[0]}" =~ "$cur" ]]; then
     for comp ; do
        if [ -z "$comp" ] ; then
          if [ ${#COMPREPLY[@]} -eq 0 ] ; then
            COMPREPLY=( " " "" )
          elif _vyatta_cfg_compreply_needs_ambiguity ; then
            COMPREPLY+=( " " )
          fi  
        fi  
      done
  fi 

  # If we didn't need ambiguity and there is only one element
  # in the compreply array then its the only available word,
  # append a space to finish the completion.
  if [[ ${#COMPREPLY[@]} -eq 1 ]]; then
    COMPREPLY=( "${COMPREPLY[0]} " ) 
  fi

  if [[ $DBG_CFG_COMPS -eq 1 ]]; then
    echo -e "\n In simple complete"
    echo "cur: $cur"
    echo "f_comps: ${f_comps[@]}"
  fi
  
  # show help text on first completion
  # this solves the confusion of not displaying the
  # non-completion values first
  if [ -z "$cur" ]; then
    vyatta_do_help=true
  fi
  # don't show help text if its the same word 
  # keeps completions from getting stuck
  if [ ${#f_comps[@]} -eq 1 ] &&
     [ -n "$cur" ] &&
     [[ "${f_comps[0]}" =~ "$cur" ]]; then
     vyatta_do_help=false 
  elif [ ${#f_comps[@]} -eq 1 ] &&
     [ -n "$current_prefix" ] &&
     [[ "${f_comps[0]}" =~ "$current_prefix" ]]; then
     vyatta_do_help=false 
  elif $vyatta_do_help ||
       [ ${#vyatta_completions[@]} -eq 0 ]; then
    printf "$vyatta_help_text" | ${VYATTA_PAGER:-cat}
    COMPREPLY=( "" " " )
  fi
  vyatta_help_text="\\nNo help text available"
}

generate_pipe_help ()
{
  _get_help_text_items=( "${_vyatta_pipe_completions[@]}" \
                         "${_vyatta_pipe_noncompletions[@]}" )
  _get_help_text_helps=()
  for comp in "${_get_help_text_items[@]}"; do
    _get_help_text_helps+=("$(_vyatta_pipe_help "$comp")")
  done
  get_help_text 0
}

### Expand config compwords ###
vyatta_config_expand_compwords ()
{ 
    local cmd=$1
    cmd=$(vyatta_cfg_expand_top_level $cmd)
    expanded_api_args=( "$cmd" )
    local _cli_shell_api_last_comp_val=''
    local _cli_shell_api_comp_help=''
    local -a _cli_shell_api_comp_values=()
    local -a _cli_shell_api_hitems=()
    local -a _cli_shell_api_hstrs=()
    local -a path=( "$cmd" )
    for arg in "${@:2}"; do
        _cli_shell_api_comp_values=()
        _cli_shell_api_last_comp_val=''
        if [[ -z $arg ]]; then 
            path=( "${expanded_api_args[@]}" '' )
        else
            path=( "${expanded_api_args[@]}" "$arg" )
        fi
        vyatta_cli_shell_api getCompletionEnv "${path[@]}"
        if [[ "${#_cli_shell_api_comp_values[@]}" == "1" ]]; then
          if [[ "$_cli_shell_api_last_comp_val" == 'true' ]]; then
            arg=$arg
          else
            arg=${_cli_shell_api_comp_values[0]}
          fi
          expanded_api_args+=( "$arg" )
        else
          expanded_api_args+=( "$arg" )
        fi
    done
}

vyatta_config_invalid_comp ()
{
  local cmd=$1 
  local -a expanded_api_args=( "$@" )
  local editlvl=$(cli-shell-api getEditLevelStr)
  local path=''
  local opath=''
  local failed=false
  local validate="cli-shell-api validateTmplPath -- $editlvl"
  for elem in "${expanded_api_args[@]:1}"; do
    if [[ -z "$elem" ]]; then
      continue
    fi
    validate="$validate '$elem'"
  done
  eval $validate
  local validateret=$?
  if [[ $validateret -eq 0 ]]; then
    echo -en "\nPossible completions:\n"
    echo -en "  <Enter>\tExecute the current command"
  elif [[ "$cmd" ==  "comment" ]];then
    echo -en "\nPossible completions:\n"
    echo -en "  <Enter>\tExecute the current command"
  else
    # find broken portion of command
    for arg in "${expanded_api_args[@]:1}"; do
      if [[ "$path" == '' ]]; then 
        path="$arg"
      else 
        path="$path $arg"
      fi   
      if ! cli-shell-api validateTmplPath -- ${editlvl} ${path}; then 
        _cli_shell_api_comp_values=()
        vyatta_cli_shell_api getCompletionEnv $cmd ${path} 
        if [[ "${#_cli_shell_api_comp_values[@]}" != "1"  
           && "${#_cli_shell_api_comp_values[@]}" != "0" ]]; then 
          local -a _get_help_text_items=( "${_cli_shell_api_hitems[@]}" )
          local -a _get_help_text_helps=( "${_cli_shell_api_hstrs[@]}" )
          local vyatta_help_text=''
          if [[ $opath == '' ]]; then 
            echo -ne "\n\n  Configuration path: [$arg] is ambiguous\n"
          else
            echo -ne "\n\n  Configuration path: $opath [$arg] is ambiguous\n"
          fi  
          get_help_text 0
          echo -ne "$vyatta_help_text\n" | sed 's/^P/  P/'
          failed=true
          break
        else
          if [[ $opath == '' ]]; then 
            echo -ne "\n\n  Configuration path: [$arg] is not valid"
          else
            echo -ne "\n\n  Configuration path: $opath [$arg] is not valid"
          fi  
          failed=true
          break
        fi  
      else 
        opath=$path
      fi   
    done 
  fi
}

# env variables for shell api completion
declare _cli_shell_api_last_comp_val=''
declare _cli_shell_api_comp_help=''
declare -a _cli_shell_api_comp_values=()
declare -a _cli_shell_api_hitems=()
declare -a _cli_shell_api_hstrs=()

vyatta_config_complete ()
{
  local restore_shopts=$( shopt -p extglob nullglob | tr \\n \; )
  shopt -s extglob nullglob
  vyatta_cfg_comp_help=''
  
  local current_word=$3
  local current_prefix=$2
  local comp_cword=$COMP_CWORD #mutable copy of COMP_CWORD so we can modify it for copy and rename
  local -a tmp_comp_list
  local exists_only=0
  
  if [[ "$COMP_LINE" == "$VYATTA_COMP_LINE" ]]; then
    VYATTA_COMP_LINE=$VYATTA_COMP_LINE_EMPTY
    vyatta_do_help=true
  else
    VYATTA_COMP_LINE=$COMP_LINE
    vyatta_do_help=false
  fi

  # handle pipe
  if _vyatta_pipe_completion "${COMP_WORDS[@]}"; then
    generate_pipe_help
    vyatta_completions=( "${_vyatta_pipe_completions[@]}" )
    vyatta_do_complete "$@"
    eval $restore_shopts
    return
  fi
  # This handles first word completion
  if (( ${#COMP_WORDS[@]} < 2 )) ||
     [[ $COMP_CWORD -eq 0 ]]; then
    _get_help_text_items=( "${_vyatta_cfg_cmds[@]}" )
    _get_help_text_helps=( "${_vyatta_cfg_helps[@]}" )
    if (( ${#COMP_WORDS[@]} == 1 )); then
      declare -a fitems=()
      declare -a fstrs=()
      # Get filtered word and help lists 
      # use the current comp word if current_word is empty
      # this only happens at the beginning of the line
      if [[ -z $current_word ]]; then
        get_prefix_filtered_list2 "${COMP_WORDS[0]}" \
          _get_help_text_items fitems _get_help_text_helps fstrs
      else 
        get_prefix_filtered_list2 "${current_prefix}" \
          _get_help_text_items fitems _get_help_text_helps fstrs
      fi
      _get_help_text_items=( "${fitems[@]}" )
      _get_help_text_helps=( "${fstrs[@]}" )
    fi
    get_help_text 0
    vyatta_completions=( "${_get_help_text_items[@]}" )
    if [[ ${#vyatta_completions[@]} -eq 0 ]]; then
       echo -ne "\n\n  Invalid command: [${COMP_WORDS[COMP_CWORD]}]"
       COMPREPLY=( "" " " )
       eval $restore_shopts
       return
    fi
    vyatta_do_complete "$@"
    eval $restore_shopts
    return
  fi

  local command=${COMP_WORDS[0]}
  ### Expand top level commands
  command=$(vyatta_cfg_expand_top_level $command)
  local last_comp="${COMP_WORDS[COMP_CWORD]}"
  if [[ "$command" == "show" ]] ||
     [[ "$command" == "comment" ]] ||
     [[ "$command" == "activate" ]] ||
     [[ "$command" == "deactivate" ]] ||
     [[ "$command" == "delete" ]]; then
    exists_only=1
  fi

  # handle "exit"
  if [[ "$command" == "exit" ]]; then
    if (( COMP_CWORD > 1 )); then
      echo -en "\nPossible completions:\n"
      echo -en "  <Enter>\tExecute the current command"
      COMPREPLY=( "" " " )
      eval $restore_shopts
      return
    fi
    _get_help_text_items=("<Enter>" "discard")
    _get_help_text_helps=("Execute the current command" "Discard any changes")
    get_help_text 0
    vyatta_completions=("discard")
    vyatta_do_complete "$@"
    eval $restore_shopts
    return
  fi

  local -a api_args=("${COMP_WORDS[@]:0:$[$COMP_CWORD+1]}")

  # handle "copy" and "rename"
  if [[ "$command" == "copy" || "$command" == "rename" ]]; then
    # Syntax of copy and rename commands are:
    #
    #     copy/rename <param1> <sub-param1> to <param2> <sub-param2>
    #
    # where <param1> and <param2> are configuration parameters
    # in the tree at the current edit level.
    #
    # If parsing index 1 or 2 (i.e. <param1> or <sub-param1>),
    # fall through this test to the parameter parsing code below.
    if (( COMP_CWORD == 3 )); then
      # If parsing index 3, there's only one option.
      _get_help_text_items=("to")
      _get_help_text_helps=("Set destination")
      get_help_text 1
      vyatta_completions=("to")
      vyatta_do_complete "$@"
      eval $restore_shopts
      return
    elif (( COMP_CWORD > 3 && COMP_CWORD < 6 )); then
      # If parsing index 4 or 5, start completion at <param2>.
      (( comp_cword -= 3 ))
      api_args=("$command" "${COMP_WORDS[@]:4}")
    elif (( COMP_CWORD > 5 )); then
      # If parsing after index 5, there are no more valid parameters
      echo -en "\nPossible completions:\n"
      echo -en "  <Enter>\tExecute the current command"
      COMPREPLY=( "" " " )
      eval $restore_shopts
      return
    fi
  fi

  local -a expanded_api_args
  vyatta_config_expand_compwords "${api_args[@]}"
  api_args=( "${expanded_api_args[@]}" )
  if [[ $DBG_CFG_COMPS -eq 1 ]]; then
    echo -e "\nargs: '$@'"
    echo -e "Current prefix: $current_prefix"
    echo -e "Current command: $current_word"
    echo -e "Last comp: $last_comp"

  fi

  # only do this for the second comp
  local nodeType="non-leaf"
  if [[ ${#api_args[@]} -gt 2 ]]; then
    nodeType=$(cli-shell-api getNodeType ${editlvl} ${api_args[@]:1:$[${comp_cword}-1]})
  fi
 
  # Change the api arguments when we are dealing with a non last word
  # completion, this allows for completions to work when in the middle 
  # of a string without requiring the user input additional spaces.
  if [[ -n "$current_word" ]] &&
     [[ -n "$last_comp" ]] &&
     [[ ! "$current_word" =~ "$last_comp"  ]]; then 
     if [[ -n "$current_prefix" ]];then
       api_args=( "${api_args[@]:0:$[$comp_cword]}" "$current_prefix" )
     else
       api_args=( "${api_args[@]:0:$comp_cword}" "" )
     fi
  fi
  if ! vyatta_cli_shell_api getCompletionEnv "${api_args[@]}"; then
    # invalid completion
    vyatta_config_invalid_comp "${expanded_api_args[@]}"
    COMPREPLY=( "" " " )
    eval $restore_shopts
    return
  fi
  vyatta_cfg_comp_help=$_cli_shell_api_comp_help
  if [[ $exists_only == 1 ]] &&
     [[ $nodeType == "tag" || $nodeType == "leaf"  || $nodeType == "multi" ]]; then
    _get_help_text_helps=( );
  else 
    _get_help_text_helps=( "${_cli_shell_api_hstrs[@]}" )
  fi
  if $_cli_shell_api_last_comp_val; then
    # last component is a "value". need to do the following:
    #   use comp_help if exists
    #   prefix filter comp_values
    #   replace any <*> in comp_values with ""
    #   convert help items to <...> representation
    if [[ $DBG_CFG_COMPS -eq 1 ]]; then
      echo -e "\nAPI args: '${api_args[@]}'"
      echo -e "Comp Values: ${_cli_shell_api_comp_values[@]}"
      echo -e "Comp Help: $_cli_shell_api_comp_help"
      echo -e "Help Items: ${_cli_shell_api_hitems[@]}"
      echo -e "Help String: ${_cli_shell_api_hstrs[@]}\n"
    fi
    _get_help_text_items=()
    if [[ $exists_only == 1 ]] &&
       [[ $nodeType == "tag" || $nodeType == "leaf"  || $nodeType == "multi" ]]; then
      _get_help_text_items=()
    else
    for ((i = 0; i < ${#_cli_shell_api_hitems[@]}; i++)); do
      local t=$(get_value_format_string "${_cli_shell_api_hitems[i]}")
      _get_help_text_items+=("$t")
    done
    fi
    vyatta_completions=()
    for ((i = 0; i < ${#_cli_shell_api_comp_values[@]}; i++)); do
      if [[ -z "$current_prefix" ]] \
         && [[ "${_cli_shell_api_comp_values[i]}" = \<*\> ]]; then
        vyatta_completions+=("")
      elif [[ -z "$last_comp" ]] \
           || [[ "${_cli_shell_api_comp_values[i]}" = "$current_prefix"* ]]; then
        vyatta_completions+=("${_cli_shell_api_comp_values[i]}")
        if ! is_elem_of ${_cli_shell_api_comp_values[i]} _get_help_text_items; then
          tmp_comp_list+=("${_cli_shell_api_comp_values[i]}")
        fi
      fi
    done
    _get_help_text_items+=( $(printf "%s\n" "${tmp_comp_list[@]}" | sort -u) )
  else
    _get_help_text_items=( "${_cli_shell_api_hitems[@]}" )
    vyatta_completions=( "${_cli_shell_api_comp_values[@]}" )
  fi
  get_help_text 1
  vyatta_simple_complete "$@"
  eval $restore_shopts
}

if ! vyatta_cli_shell_api setupSession; then
  echo 'Failed to set up config session'
  builtin exit 1
fi

# disallow 'Ctrl-D' exit, since we need special actions on 'exit'
builtin set -o ignoreeof 1

reset_edit_level

export VYATTA_COMP_LINE_EMPTY=VYATTA_COMP_LINE_EMPTY
export VYATTA_COMP_LINE=$VYATTA_COMP_LINE_EMPTY


# note: now that we're using bash's new "empty completion" (-E), it becomes
# necessary to capture the "default completion" (-D) as well in order to
# provide completion "within the first word". (see below for -E and -D
# assignments.) however, this changes the previous behavior that uses
# "filename completion" as default completion.
#
# since we explicitly specify the completion function for each vyatta command,
# the "default completion" only applies in two scenarios:
#   1. "within" the first word, and
#   2. after any non-vyatta commands that do not have completion functions.
#
# therefore, to provide the previous behavior, just detect scenario 2 above
# and use filename completion.
vyatta_config_default_complete ()
{
  local wc=${#COMP_WORDS[@]}
  if (( wc < 2 )) ||
     [[ $COMP_CWORD -eq 0 ]] ||
     [[ $1 == $2 ]]; then
    vyatta_config_complete "$@"
  else
    # after the first word => cannot be vyatta command so use original default
    compopt -o filenames
    _filedir_xspec
  fi
}

_vyatta_cfg_init 

# Local Variables:
# mode: shell-script
# sh-indentation: 4
# End: