#!/usr/bin/env bash

BASHTARD_PLAYBOOK_VARS[$BASHTARD_PLAYBOOK.cert-hash]="required"
BASHTARD_PLAYBOOK_VARS[$BASHTARD_PLAYBOOK.master.address]="required"
BASHTARD_PLAYBOOK_VARS[$BASHTARD_PLAYBOOK.token]="required"

playbook_add() {
	local version

	version="1.29"

	case "${BASHTARD_PLATFORM[key]}" in
		linux-debian_gnu_linux)
			# Fetch the apt key
			info "$BASHTARD_PLAYBOOK" "Adding apt repository"
			mkdir -pv -m 755 -- /etc/apt/keyrings
			curl -fsSL "https://pkgs.k8s.io/core:/stable:/v$version/deb/Release.key" \
				| gpg --dearmor \
				> /etc/apt/keyrings/kubernetes-apt-keyring.gpg
			printf "deb [signed-by=%s] %s /\n" \
				"/etc/apt/keyrings/kubernetes-apt-keyring.gpg" \
				"https://pkgs.k8s.io/core:/stable:/v$version/deb/" \
				> /etc/apt/sources.list.d/kubernetes.list
			apt update
			;;
	esac

	pkg install containerd
	pkg install kubeadm
	pkg install kubectl
	pkg install kubelet

	info "$BASHTARD_PLAYBOOK" "Enabling forwarding"
	cat <<-EOF > "$(config "fs.etcdir")/sysctl.d/kubernetes.conf"
		net.bridge.bridge-nf-call-iptables  = 1
		net.bridge.bridge-nf-call-ip6tables = 1
		net.ipv4.ip_forward                 = 1
		net.ipv6.conf.all.forwarding        = 1
		EOF

	sysctl --system

	info "$BASHTARD_PLAYBOOK" "Enabling kernel modules"
	cat <<-EOF > "$(config "fs.etcdir")/modules-load.d/kubernetes.conf"
		br_netfilter
		overlay
		EOF

	modprobe overlay
	modprobe br_netfilter

	if [[ "$(config "$BASHTARD_PLAYBOOK.node-ip" "")" != "" ]]
	then
		notice "$BASHTARD_PLAYBOOK" "Setting node ip in $(config "fs.etcdir")/default/kubelet"
		cat <<-EOF > "$(config "fs.etcdir")/default/kubelet"
			KUBELET_EXTRA_ARGS="--node-ip=$(config "$BASHTARD_PLAYBOOK.node-ip")"
			EOF
	fi

	notice "$BASHTARD_PLAYBOOK" "Initialize kubeadm"
	kubeadm join \
		--discovery-token-ca-cert-hash "$(config "$BASHTARD_PLAYBOOK.cert-hash")" \
		--node-name="${BASHTARD_PLATFORM[fqdn]}" \
		--token "$(config "$BASHTARD_PLAYBOOK.token")" \
		"$(config "$BASHTARD_PLAYBOOK.master.address"):$(config "$BASHTARD_PLAYBOOK.master.port" "6443")"
}

playbook_sync() {
	:;
}

playbook_del() {
	kubectl drain "${BASHTARD_PLATFORM[fqdn]}" \
		--delete-emptydir-data \
		--force \
		--ignore-daemonsets

	kubeadm reset --force
	iptables -F && iptables -t nat -F && iptables -t mangle -F && iptables -X
	ipvsadm -C
	rm -fr -- \
		"$(config "fs.etcdir")/modules-load.d/kubernetes.conf" \
		"$(config "fs.etcdir")/sysctl.d/kubernetes.conf" \
		"$(config "fs.etcdir")/cni/net.d" \
		"$(config "fs.etcdir")/kubernetes" \
		"/var/lib/etcd" \
		"/var/lib/cni"

	pkg uninstall kubectl
	pkg uninstall kubeadm
	pkg uninstall kubelet
	pkg uninstall containerd

	case "${BASHTARD_PLATFORM[key]}" in
		linux-debian_gnu_linux)
			# Fetch the apt key
			info "$BASHTARD_PLAYBOOK" "Removing apt repository"
			rm -fr -- \
				/etc/apt/keyrings/kubernetes-apt-keyring.gpg \
				/etc/apt/sources.list.d/kubernetes.list
			;;
	esac
}