#!/usr/bin/bash

if [[ $(whoami) == "root" ]]; then
	echo "Do not run this script as root."
	exit
fi


while ! [[ "$podman_mode" =~ ^(rootful|rootless)$ ]]; do
	read -rp "Rootful or rootless Podman? " podman_mode
done


declare -a podman_units=(podman.service podman.socket podman-auto-update.service podman-auto-update.timer podman-clean-transient.service podman-restart.service)


if [[ "$podman_mode" == "rootless" ]]; then
	sudo apt install -y aardvark-dns dbus-user-session nftables passt podman podman-compose python3-mako uidmap

	sudo loginctl enable-linger "$USER"

	sudo systemctl disable --now "${podman_units[@]}"
	systemctl --user enable --now "${podman_units[@]}"
else
	sudo apt install -y aardvark-dns nftables podman podman-compose python3-mako

	systemctl --user disable --now "${podman_units[@]}"
	sudo systemctl enable --now "${podman_units[@]}"
fi


declare -A sysctl_vars=(
	[vm.overcommit_memory]=1
	[net.core.wmem_max]=7500000
	[net.core.rmem_max]=7500000
)

echo -n "" | sudo tee /etc/sysctl.d/podman.conf
for key in "${!sysctl_vars[@]}"; do
	value="${sysctl_vars[$key]}"
	echo "$key = $value" | sudo tee -a /etc/sysctl.d/podman.conf
done
sudo sysctl -p /etc/sysctl.d/podman.conf


sudo systemctl enable --now nftables