#!/usr/bin/env bash
# shellcheck disable=SC1090 # dynamically sourced file

_sqn_completions()
{
  # Current search string
  local cur=${COMP_WORDS[COMP_CWORD]}
  # Extract alias command with buildins same as:
  # local curCmd="$(alias $1 | sed "s/^alias.*\" \"\(.*\)\"'$/\1/")"
  local curCmd=
  curCmd="$(alias "$1")"
  curCmd="${curCmd##*\" \"}"
  curCmd="${curCmd%\"\'*}"
  COMPREPLY=()
  case "$cur" in
    -*|+*)
      opts=( \
        -- ++\
        -a --all \
        -c --config \
        -d --dry-run \
        -h --help \
        -ha --helpapi \
        -ls --liststeps \
        -p --profile \
        -pl \
        -q --quiet \
        -qq \
        -s --single \
        -v --verbose \
        --version)
      read -r -d '' -a COMPREPLY < <(compgen -W "${opts[*]}" -- "$cur");;
    *)
      case "${COMP_WORDS[((COMP_CWORD-1))]}" in
        # provide completion for option with parameter
        -p|--profile)
          # sequencer.sh provides creation of a profile list with search functionality
          read -r -a COMPREPLY <<<"$( "$curCmd" -pl "${cur}" 2>/dev/null)"
          ;;
        *)
          # Stop after step selection (last argument which is not an option (starting with "-|+")
          # or option paramter (profile name))
          if (( COMP_CWORD > 1 )) && [[ ! "${COMP_WORDS[((COMP_CWORD - 1))]}" =~ ^(-|\+) ]] ; then
            case "${COMP_WORDS[((COMP_CWORD - 2))]}" in
              -p|--profile)
                ;;
              *)
                return
                ;;
            esac
          fi
          # sequencer.sh provides creation of a step list with search functionality
          read -r -a COMPREPLY <<<"$( "$curCmd" -ls "$cur" )"
          ;;
      esac
      ;;
  esac
  return 0
}

installCompletion() {
  # Get script working directory
  # (when called from a different directory)
  local script_dir=
  script_dir="$(cd "$(dirname -- "${BASH_SOURCE[0]}")" >>/dev/null 2>&1 && pwd)"

  . "${script_dir}/sequencer.cfg" >/dev/null 2>&1

  local SEQBASE="${script_dir}/seqs"
  local SEQPREFIX="sqn_"
  local SEQSHORT=()

  # Check for user selected sequences
  [ -e "$SEQUENCER_USER_SEQS" ] && SEQBASE="$SEQUENCER_USER_SEQS"

  # Create aliases and command (alias) list for "complete" command"
  IFS=$'\n' read -r -d '' -a SEQLIST < <(ls -1 "$SEQBASE/${cur}"*.sh)
  for i in "${!SEQLIST[@]}"; do
    SEQLIST[$i]="${SEQLIST[$i]##*/}"
    SEQLIST[$i]="${SEQLIST[$i]%.*}"
    SEQSHORT[$i]="${SEQPREFIX}${SEQLIST[$i]/[[:blank:]]/_}"
    # shellcheck disable=SC2139,SC2086
    # alias should be expanded when defined
    alias ${SEQSHORT[$i]}="_SQN_ALIAS=\"${SEQSHORT[$i]}\" \"$SEQBASE/${SEQLIST[$i]}.sh\""
  done
  complete -o nosort -o bashdefault -o default -F _sqn_completions "${SEQSHORT[@]}"
}

installCompletion