#!/bin/sh

cd "$(dirname "$0")" || exit 1

if test "$#" -eq 0; then
	set --
	for font in \
		/usr/share/fonts/TTF/DejaVuSans.ttf \
		/usr/share/fonts/TTF/Jigmo.ttf \
		/usr/share/fonts/TTF/Jigmo2.ttf \
		/usr/share/fonts/noto/NotoSansCJK-Regular.ttc
	do
		if test -f "$font"; then
			set -- "$@" "$font"
		fi
	done
	if test "$#" -eq 0; then
		echo "run.sh: no default font found; pass a font file" >&2
		exit 1
	fi
fi

if ! test -x ./strans; then
	echo "run.sh: ./strans is not executable; run make first" >&2
	exit 1
fi
if test -n "${DISPLAY-}" && ! test -x xim/strans-xim; then
	echo "run.sh: xim/strans-xim is not executable; run make first" >&2
	exit 1
fi

case ${XDG_RUNTIME_DIR-} in
/)	ipc=/strans.sock ;;
/*/)	ipc=${XDG_RUNTIME_DIR}strans.sock ;;
/*)	ipc=${XDG_RUNTIME_DIR}/strans.sock ;;
*)	ipc=/tmp/strans.$(id -u) ;;
esac
if test -n "${XDG_CONFIG_HOME-}"; then
	busdir=$XDG_CONFIG_HOME/ibus/bus
elif test "${HOME+x}" = x; then
	busdir=$HOME/.config/ibus/bus
else
	echo "run.sh: HOME or XDG_CONFIG_HOME is required for IBus discovery" >&2
	exit 1
fi

strans_pid=
xim_pid=

cleanup()
{
	status=$?
	trap - 0 1 2 15
	if test -n "$xim_pid"; then
		kill "$xim_pid" 2>/dev/null || :
		wait "$xim_pid" 2>/dev/null || :
		xim_pid=
	fi
	if test -n "$strans_pid"; then
		kill "$strans_pid" 2>/dev/null || :
		wait "$strans_pid" 2>/dev/null || :
		strans_pid=
	fi
	exit "$status"
}

ibusready()
{
	for address in "$busdir"/*; do
		test -f "$address" || continue
		foundpid=
		foundaddress=
		while IFS= read -r line; do
			case $line in
			IBUS_DAEMON_PID="$strans_pid")	foundpid=1 ;;
			IBUS_ADDRESS=unix:abstract=strans-"$strans_pid",*)	foundaddress=1 ;;
			esac
		done <"$address"
		if test -n "$foundpid" && test -n "$foundaddress"; then
			return 0
		fi
	done
	return 1
}

trap cleanup 0
trap 'exit 129' 1
trap 'exit 130' 2
trap 'exit 143' 15

./strans map "$@" &
strans_pid=$!

attempt=0
while test "$attempt" -lt 10; do
	if test -S "$ipc" && ibusready; then
		break
	fi
	if ! kill -0 "$strans_pid" 2>/dev/null; then
		wait "$strans_pid"
		status=$?
		strans_pid=
		if test "$status" -eq 0; then
			status=1
		fi
		echo "run.sh: daemon exited before publishing IPC and IBus endpoints" >&2
		exit "$status"
	fi
	attempt=$((attempt + 1))
	if test "$attempt" -lt 10; then
		sleep 1
	fi
done
if test "$attempt" -eq 10; then
	echo "run.sh: daemon did not publish IPC and IBus endpoints within 10 seconds" >&2
	exit 1
fi

echo "run.sh: daemon $strans_pid is ready"
if test -z "${DISPLAY-}"; then
	echo "run.sh: DISPLAY is unset; XIM will not be started"
	wait "$strans_pid"
	status=$?
	strans_pid=
	exit "$status"
fi

xim/strans-xim &
xim_pid=$!
echo "run.sh: started XIM $xim_pid; press Ctrl-C to stop both processes"
wait "$xim_pid"
status=$?
xim_pid=
exit "$status"