#!/usr/bin/env -S bats --report-formatter junit --formatter tap
# -*-sh-*-

export BATS_JUNIT_CLASS=Singularity
source ./common/test_helper_functions.bash || exit 1
source ./common/functions || exit 1

if [ -s ./common/TEST_ENV ];then
    source ./common/TEST_ENV
fi

module purge || exit 1

# function to capture bash tab completion
# thank you wise ol' internet:
# (https://brbsix.github.io/2015/11/29/accessing-tab-completion-programmatically-in-bash/)
get_completions(){
    local completion COMP_CWORD COMP_LINE COMP_POINT COMP_WORDS COMPREPLY=()

    # load bash-completion if necessary
    declare -F _completion_loader &>/dev/null || {
	source /usr/share/bash-completion/bash_completion
    }

    COMP_LINE=$*
    COMP_POINT=${#COMP_LINE}

    eval set -- "$@"

    COMP_WORDS=("$@")

    # add '' to COMP_WORDS if the last character of the command line is a space
    [[ ${COMP_LINE[@]: -1} = ' ' ]] && COMP_WORDS+=('')

    # index of the last word
    COMP_CWORD=$(( ${#COMP_WORDS[@]} - 1 ))

    # determine completion function
    completion=$(complete -p "$1" 2>/dev/null | awk '{print $(NF-1)}')

    # run _completion_loader only if necessary
    [[ -n $completion ]] || {

	# load completion
	_completion_loader "$1"

	# detect completion
	completion=$(complete -p "$1" 2>/dev/null | awk '{print $(NF-1)}')

    }

    # ensure completion was detected
    [[ -n $completion ]] || return 1

    # execute completion function
    "$completion"

    # print completions to stdout
    printf '%s\n' "${COMPREPLY[@]}" | LC_ALL=C sort
}


@test "[singularity] check for bash completion" {
    run get_completions singularity bui
    assert_output "build"
}

