# -*- mode: shell-script; sh-basic-offset: 8; indent-tabs-mode: t -*-
# ex: ts=8 sw=8 noet filetype=sh

# mutt completion
#
# Mutt doesn't have an "addressbook" like Pine, but it has aliases and
# a "query" function to retrieve addresses, so that's what we use here.
have mutt || have muttng && {
_muttaddr()
{
	_muttaliases
	_muttquery

	cur=`_get_cword`
	COMPREPLY=( "${COMPREPLY[@]}" $( compgen -u -- $cur ) )

	return 0
}

_muttconffiles()
{
	local file sofar
	local -a newconffiles

	sofar=" $1 "
	shift
	while [[ "$1" ]]; do
	    newconffiles=( $(sed -rn 's|^source[[:space:]]+([^[:space:]]+).*$|\1|p' $(eval echo $1) ) )
	    for file in "${newconffiles[@]}"; do
		[[ ! "$file" ]] || [[ "${sofar/ ${file} / }" != "$sofar" ]] &&
		    continue
		sofar="$sofar $file"
		sofar=" $(eval _muttconffiles \"$sofar\" $file) "
	    done
	    shift
	done
	echo $sofar
}

_muttaliases()
{
	local cur muttrc
	local -a conffiles aliases
	cur=`_get_cword =`

	[ -f ~/.${muttcmd}/${muttcmd}rc ] && muttrc="~/.${muttcmd}/${muttcmd}rc"
	[ -f ~/.${muttcmd}rc ] && muttrc="~/.${muttcmd}rc"
	[ -z "$muttrc" ] && return 0

	conffiles=( $(eval _muttconffiles $muttrc $muttrc) )
	aliases=( $( sed -rn 's|^alias[[:space:]]+([^[:space:]]+).*$|\1|p' \
			$(eval echo "${conffiles[@]}") ) )
	COMPREPLY=( "${COMPREPLY[@]}" $( compgen -W "${aliases[*]}" -- $cur ) )

	return 0
}

_muttquery()
{
	local cur querycmd
	local -a queryresults
	cur=`_get_cword`

	querycmd="$( $muttcmd -Q query_command  | sed -r 's|^query_command=\"(.*)\"$|\1|; s|%s|'$cur'|' )"
	if [ -z "$cur" -o -z "$querycmd" ]; then
	    queryresults=()
	else
	    queryresults=( $( $querycmd | \
	      sed -nr '2,$s|^([^[:space:]]+).*|\1|p' ) )
	fi

	COMPREPLY=( "${COMPREPLY[@]}" $( compgen -W "${queryresults[*]}" \
			-- $cur ) )

	return 0
}

_muttfiledir()
{
	local cur folder spoolfile
	cur=`_get_cword`

	# This is currently not working so well. Perhaps this function should
	# just call _filedir() for the moment.
	if [[ $cur == [=+]* ]]; then
		folder="$( $muttcmd -Q folder | sed -r 's|^folder=\"(.*)\"$|\1|' )"
		: folder:=~/Mail

		# Match any file in $folder beginning with $cur
		# (minus the leading '=' sign).
		COMPREPLY=( $( compgen -f -- "$folder/${cur:1}" ) )
		COMPREPLY=( ${COMPREPLY[@]#$folder/} )
		return 0
	elif [ "$cur" == !* ]; then
		spoolfile="$( $muttcmd -Q spoolfile | sed -r 's|^spoolfile=\"(.*)\"$|\1|' )"
		[ ! -z "$spoolfile" ] && eval cur="${cur/^!/$spoolfile}";
	fi
	_filedir

	return 0
}

_mutt()
{
	local cur prev
	cur=`_get_cword`
	prev=${COMP_WORDS[COMP_CWORD-1]}

	COMPREPLY=()

	[ ${COMP_WORDS[0]} == muttng ] && muttcmd="muttng" || muttcmd="mutt"

	case "$cur" in
	-*)
		COMPREPLY=( $( compgen -W '-A -a -b -c -e -f -F -H -i -m -n \
					    -p -Q -R -s -v -x -y -z -Z -h' \
					    -- $cur ) )
		return 0
		;;
	*)
	    case "$prev" in
	    -@(a|f|F|H|i))
		    _muttfiledir
		    return 0
		    ;;
	    -A)
		    _muttaliases
		    return 0
		    ;;
	    -@(e|m|Q|s|h|p|R|v|y|z|Z))
		    return 0
		    ;;
	    *)
		    _muttaddr
		    return 0
		    ;;
	    esac
	    ;;
	esac

}
complete -F _mutt $default $filenames mutt muttng
}