#!/sbin/openrc-run
# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

description="FastFlowLM NPU runtime — OpenAI-compatible LLM server on XDNA2."

: ${FLM_USER:=fastflowlm}
: ${FLM_MODEL_PATH:=/var/lib/fastflowlm}
: ${FLM_MODEL:=qwen3:0.6b}
: ${FLM_HOST:=127.0.0.1}
: ${FLM_PORT:=}
: ${FLM_ASR:=1}
: ${FLM_EMBED:=1}
: ${FLM_PMODE:=performance}
: ${FLM_LOG:=/var/log/flm.log}
: ${FLM_EXTRA_OPTS:=}

supervisor="supervise-daemon"
command="/usr/bin/flm"
output_log="${FLM_LOG}"
error_log="${FLM_LOG}"
respawn_delay=5
respawn_max=0

# FLM mlocks NPU buffers — memlock must be unlimited.
rc_ulimit="-l unlimited"

depend() {
	need net
	after net
}

start_pre() {
	if ! getent passwd "${FLM_USER}" > /dev/null; then
		eerror "User '${FLM_USER}' not found on this system."
		return 1
	fi
	# supervise-daemon opens the log redirect as the dropped user, so the
	# file must exist and be owned by it.
	if [ -n "${FLM_LOG}" ]; then
		checkpath -f -m 0640 -o "${FLM_USER}:${FLM_USER}" "${FLM_LOG}" || return 1
	fi
	# Shared model store; the directory itself is owned by acct-user/fastflowlm.
	if [ -n "${FLM_MODEL_PATH}" ]; then
		checkpath -d -m 2770 -o fastflowlm:fastflowlm "${FLM_MODEL_PATH}/models" || return 1
		export FLM_MODEL_PATH
	fi
	local args="serve --host ${FLM_HOST} --pmode ${FLM_PMODE} -a ${FLM_ASR} -e ${FLM_EMBED}"
	[ -n "${FLM_PORT}" ] && args="${args} --port ${FLM_PORT}"
	[ -n "${FLM_EXTRA_OPTS}" ] && args="${args} ${FLM_EXTRA_OPTS}"
	args="${args} ${FLM_MODEL}"
	command_args="${args}"
	command_user="${FLM_USER}:${FLM_USER}"
}