lain

#!/usr/bin/env bash
set -euo pipefail

SCRIPT_PATH="$(readlink -f -- "${BASH_SOURCE[0]}")"
ROOT_DIR="$(CDPATH= cd -- "$(dirname -- "$SCRIPT_PATH")" && pwd)"
LAINOS_DIR="$ROOT_DIR/services/lainos"

usage() {
	printf '%s\n' \
		"Usage: lain [command] [args...]" \
		"" \
		"Commands:" \
		"  tui          Start the full-screen terminal UI (default)" \
		"  chat         Start the simple interactive REPL" \
		"  serve        Start the HTTP/Telegram daemon in the foreground" \
		"  daemon       Alias for serve" \
		"  wired        Start the Wired HTTP bridge" \
		"  smoke        Run the LainOS smoke test" \
		"  study        Run the Cyberia study task" \
		"  build        Compile TypeScript" \
		"  typecheck    Type-check without emitting files" \
		"  install      Install npm dependencies for LainOS" \
		"  status       Show the user systemd service status" \
		"  logs         Follow the user systemd service logs" \
		"  restart      Restart the user systemd service" \
		"  stop         Stop the user systemd service" \
		"  help         Show this help" \
		"" \
		"Examples:" \
		"  lain" \
		"  lain chat" \
		"  lain serve" \
		"  lain logs"
}

die() {
	printf 'lain: %s\n' "$*" >&2
	exit 1
}

require_lainos_dir() {
	[ -f "$LAINOS_DIR/package.json" ] || die "cannot find services/lainos/package.json from $ROOT_DIR"
}

require_node_modules() {
	[ -d "$LAINOS_DIR/node_modules" ] || die "missing services/lainos/node_modules; run: lain install"
}

run_npm_script() {
	local script="$1"
	shift
	require_lainos_dir
	require_node_modules
	cd "$LAINOS_DIR"
	exec npm run "$script" -- "$@"
}

cmd="${1:-tui}"
if [ "$#" -gt 0 ]; then
	shift
fi

case "$cmd" in
	tui)
		run_npm_script tui "$@"
		;;
	chat)
		run_npm_script chat "$@"
		;;
	serve|daemon)
		run_npm_script serve "$@"
		;;
	wired)
		run_npm_script serve:wired "$@"
		;;
	smoke)
		run_npm_script smoke "$@"
		;;
	study)
		run_npm_script study:cyberia "$@"
		;;
	build)
		run_npm_script build "$@"
		;;
	typecheck)
		run_npm_script typecheck "$@"
		;;
	install)
		require_lainos_dir
		cd "$LAINOS_DIR"
		exec npm install "$@"
		;;
	status)
		exec systemctl --user status lainos.service "$@"
		;;
	logs)
		exec journalctl --user -u lainos.service -f "$@"
		;;
	restart)
		exec systemctl --user restart lainos.service "$@"
		;;
	stop)
		exec systemctl --user stop lainos.service "$@"
		;;
	help|-h|--help)
		usage
		;;
	*)
		usage >&2
		exit 2
		;;
esac