#!/sbin/openrc-run
supervisor=supervise-daemon
no_new_privs="yes"
pidfile="/var/run/akkoma.pid"

# Ask process first to terminate itself within 60s, otherwise kill it
retry="SIGTERM/60/SIGKILL/5"

# if you really want to use start-stop-daemon instead,
# also put the following in the config:
#    command_background=1

# Adjust defaults as needed in /etc/conf.d/akkoma;
# no need to directly edit the service file
command_user="${command_user:-akkoma:akkoma}"
directory="${directory:-/var/lib/akkoma/akkoma}"
akkoma_port="${akkoma_port:-4000}"
# whether to allow connecting a remote exlixir shell to the running Akkoma instance
akkoma_console=${akkoma_console:-NO}

output_log="${output_log:-/var/log/akkoma}"
error_log="${error_log:-/var/log/akkoma}"

# 0 means unlimited restarts
respawn_max="${respawn_max:-0}"
respawn_delay="${respawn_delay:-5}"
# define respawn period to only count crashes within a
# sliding time window towards respawn_max, e.g.:
#   respawn_period=2850

healthcheck_delay="${healthcheck_delay:-60}"
healthcheck_timer="${healthcheck_timer:-30}"

MIX_ENV=prod
ERL_EPMD_ADDRESS="${ERL_EPMD_ADDRESS:-127.0.0.1}"
ERL_AFLAGS="${ERL_AFLAGS:-+sbwt none +sbwtdcpu none +sbwtdio none}"
supervise_daemon_args="${supervise_daemon_args} --env MIX_ENV=${MIX_ENV}"
supervise_daemon_args="${supervise_daemon_args} --env ERL_EPMD_ADDRESS=${ERL_EPMD_ADDRESS}"
supervise_daemon_args="${supervise_daemon_args} --env ERL_AFLAGS='${ERL_AFLAGS}'"

if yesno "${akkoma_console}"; then
	command=elixir
	command_args="--name akkoma@127.0.0.1 --erl '-kernel inet_dist_listen_min 9001 inet_dist_listen_max 9001 inet_dist_use_interface {127,0,0,1}' -S mix phx.server"

	start_post() {
		einfo "You can get a console by using this command as akkoma's user:"
		einfo "iex --name console@127.0.0.1 --remsh akkoma@127.0.0.1"
	}
else
	command=/usr/bin/mix
	command_args="phx.server"
fi

depend() {
	need nginx postgresql
}

start_pre() {
	# Ensure logfile ownership and perms are alright
	checkpath --file --owner "$command_user" "$output_log" "$error_log" \
	|| eerror "Logfile(s) not owned by $command_user, or not a file!"
	checkpath --writable "$output_log" "$error_log" \
	|| eerror "Logfile(s) not writable!"

	# If a recompile is needed perform it with lowest prio
	# (delaying the actual start) to avoid hogging too much
	# CPU from other services
	cd "$directory"
	doas -u "${command_user%%:*}" env MIX_ENV="$MIX_ENV" nice -n 19 "$command" compile
}

healthcheck() {
	# put akkoma_health=YES in /etc/conf.d/akkoma if you want healthchecking
	# and make sure you have curl installed
	yesno "$akkoma_health" || return 0

	curl -q "localhost:${akkoma_port}/api/akkoma/healthcheck"
}