_dropbox()
{
	local cur cmds cmdOpts opt helpCmds optBase i

	COMPREPLY=()
	cur=${COMP_WORDS[COMP_CWORD]}

	cmds='filestatus help ls puburl start status stop'


	if [[ $COMP_CWORD -eq 1 ]] ; then
		COMPREPLY=( $( compgen -W "$cmds" -- $cur ) )
		return 0
	fi

	# if not typing an option, or if the previous option required a
	# parameter, then fallback on ordinary filename expansion
	helpCmds='help|--help|h|\?'
	if [[ ${COMP_WORDS[1]} != @($helpCmds) ]] && \
	   [[ "$cur" != -* ]] ; then
		return 0
	fi

	cmdOpts=
	case ${COMP_WORDS[1]} in
	filestatus|help|ls|puburl|start|status|stop)
		cmdOpts="-h --help"
		;;
	help|h|\?)
		cmdOpts="$cmds $qOpts"
		;;
	*)
		;;
	esac

	cmdOpts="$cmdOpts --help -h"

	# take out options already given
	for (( i=2; i<=$COMP_CWORD-1; ++i )) ; do
		opt=${COMP_WORDS[$i]}

		case $opt in
		--*)    optBase=${opt/=*/} ;;
		-*)     optBase=${opt:0:2} ;;
		esac

		cmdOpts=" $cmdOpts "
		cmdOpts=${cmdOpts/ ${optBase} / }

		# take out alternatives
		case $optBase in
		-h)              cmdOpts=${cmdOpts/ --help / } ;;
		--help)          cmdOpts=${cmdOpts/ -h / } ;;
		esac

		# skip next option if this one requires a parameter
		if [[ $opt == @($optsParam) ]] ; then
			((++i))
		fi
	done

	COMPREPLY=( $( compgen -W "$cmdOpts" -- $cur ) )

	return 0
}
complete -F _dropbox -o default dropbox