#/usr/bin/env bash

_sqnall_completions()
{
  # Current search string
  local cur=${COMP_WORDS[COMP_CWORD]}
  # Extract alias command with buildins same as:
  #   local curCmd="$(alias $1 | sed "s/^alias.*='\(.*\)'$/\1/")"
  local curCmd="$(alias "$1")"
  curCmd="${curCmd#*=\'}"
  curCmd="${curCmd%\'*}"
  COMPREPLY=()
  case "$cur" in
    -*)
      COMPREPLY=( $( compgen -W '-c -d -h -ha -ls -p -pl -q -qq -s -v --version' -- $cur ) );;
    *)
      # Stop after step selection (last argument which is not an option; starting with "-")
      (( COMP_CWORD > 1 )) && [[ ! "${COMP_WORDS[((COMP_CWORD - 1))]}" =~ ^- ]] && return
      # sequencer.sh provides creation of a step list with search functionality
      COMPREPLY=( $( "$curCmd" -ls "$cur" ) );;
  esac
  return 0
}

installCompletion() {
  local SEQBASE="/opt/sequencer/seqs"
  local SEQPREFIX="sqn_"
  local SEQSHORT=()
  # Create aliases and command (alias) list for "complete" command"
  SEQLIST=($(ls "$SEQBASE/$cur"*.sh))
  for i in "${!SEQLIST[@]}"; do
    SEQLIST[$i]="${SEQLIST[$i]##*/}"
    SEQLIST[$i]="${SEQLIST[$i]%.*}"
    SEQSHORT[$i]="${SEQPREFIX}${SEQLIST[$i]}"
    alias ${SEQSHORT[$i]}="$SEQBASE/${SEQLIST[$i]}.sh"
  done
  complete -o nosort -o bashdefault -o default -F _sqnall_completions ${SEQSHORT[@]}
}

installCompletion