#!/usr/bin/env bash

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

	notice "$BASHTARD_PLAYBOOK" "Creating data directories"
	mkdir -pv -- "$(playbook_path "data")/manifests.d"

	if [[ "$(config "$BASHTARD_PLAYBOOK.flags.apiserver-advertise-address" "")" != "" ]]
	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.flags.apiserver-advertise-address")"
			EOF
	fi

	notice "$BASHTARD_PLAYBOOK" "Initialize kubeadm"
	kubeadm init \
		--apiserver-advertise-address="$(config "$BASHTARD_PLAYBOOK.flags.apiserver-advertise-address" "127.0.0.1")" \
		--apiserver-bind-port="$(config "$BASHTARD_PLAYBOOK.flags.apiserver-bind-port" "6443")" \
		--control-plane-endpoint="$(config "$BASHTARD_PLAYBOOK.flags.control-plane-endpoint" "localhost")" \
		--node-name="${BASHTARD_PLATFORM[fqdn]}" \
		--service-cidr="$(config "$BASHTARD_PLAYBOOK.flags.service-cidr" "10.96.0.0/12")" \
		--service-dns-domain="$(config "$BASHTARD_PLAYBOOK.flags.service-dns-domain" "cluster.local")" \
		--pod-network-cidr="$(config "$BASHTARD_PLAYBOOK.flags.pod-network-cidr" "10.0.0.0/12")" \
		|| return 1

	playbook_sync

	return 0
}

playbook_sync() {
	local data
	local kubeconfig
	local manifest_prefix
	local values

	data="$(playbook_path "data")"
	kubeconfig="$(config "fs.etcdir")/kubernetes/admin.conf"
	manifest_prefix="$(config "$BASHTARD_PLAYBOOK.manifest-prefix" "")"

	notice "$BASHTARD_PLAYBOOK/manifests" "Applying manifests.d"
	kubectl --kubeconfig "$kubeconfig" apply --recursive --filename "$data/manifests.d/$manifest_prefix"
}

playbook_del() {
	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
}