#!/bin/sh
set -e -u

show_help() {
	echo 'Usage: pkg command [arguments]'
	echo ''
	echo 'A tool for managing packages. Commands:'
	echo ''
	echo '  files <packages>'
	echo '  install <packages>'
	echo '  list-all'
	echo '  list-installed'
	echo '  reinstall <packages>'
	echo '  search <query>'
	echo '  show <packages>'
	echo '  uninstall <packages>'
	echo '  upgrade'
	exit 1
}

assert_not_root() {
	if [ $(id -u) -eq 0 ]; then
		echo "This must NOT be run as root as it will break your environment (root will be required for nearly everything due to changed file permissions)"
		exit 1
	fi
}

check_pkgcache() {
	if [ -z "$(find @TERMUX_PREFIX@/var/cache/apt/pkgcache.bin -mmin -5)" ]; then
		apt update
	fi
}

if [ $# = 0 ]; then
	show_help
fi

CMD="$1"
shift 1

case "$CMD" in
	f*) dpkg -L "$@";;
	h*) show_help;;
	add|i*) assert_not_root; check_pkgcache; apt install "$@";;
	list-a*) apt list "$@";;
	list-i*) apt list --installed "$@";;
	rei*) assert_not_root; apt install --reinstall "$@";;
	se*) assert_not_root; check_pkgcache; apt search "$@";;
	sh*) apt show "$@";;
	un*|rem*|rm|del*) assert_not_root; apt remove "$@";;
	up*) assert_not_root; apt update; apt full-upgrade "$@";;
	*) echo "Unknown command: '$CMD' (run 'pkg help' for usage information)"; exit 1;;
esac