#!/usr/bin/env bash

function _comp_cmd_test1 {
	COMPREPLY=()
	case $COMP_CWORD in
		1) COMPREPLY=($(compgen -W '-h --h -v --verbose --loud sub1 sub2' -- $2)) ;;
		*)
			case ${COMP_WORDS[1]} in
				sub1)
					case $COMP_CWORD in
						2) COMPREPLY=($(compgen -W '--foobar nested' -- $2)) ;;
						*)
							case ${COMP_WORDS[2]} in
								nested)
									case $COMP_CWORD in
										3) COMPREPLY=($(compgen -W '-co --command --install' -- $2)) ;;
									esac
									;;
							esac
							;;
					esac
					;;
				sub2)
					case $COMP_CWORD in
						2) COMPREPLY=($(compgen -W '--a --all -C --backupdir' -- $2)) ;;
					esac
					;;
			esac
			;;
	esac
	return 0
}

complete -F _comp_cmd_test1 test1