#!/bin/bash
set -euo pipefail

#
# Helper functions
#
declare -i term_width=80

h1() {
    declare border padding text
    border='\e[1;34m'"$(printf '=%.0s' $(seq 1 "$term_width"))"'\e[0m'
    padding="$(printf ' %.0s' $(seq 1 $(((term_width - $(wc -m <<<"$*")) / 2))))"
    text="\\e[1m$*\\e[0m"
    echo -e "$border"
    echo -e "${padding}${text}${padding}"
    echo -e "$border"
}

h2() {
    printf '\e[1;33m==>\e[37;1m %s\e[0m\n' "$*"
}

etcd_version="${1:-v3.4.16}"; shift || true

h1 "Install etcd"
h2 "Version: ${etcd_version}"

# install the binaries.
url="https://github.com/etcd-io/etcd/releases/download/$etcd_version/etcd-$etcd_version-linux-amd64.tar.gz"
filename="$(basename "$url")"
wget -q "$url"
rm -rf etcd && mkdir etcd
tar xf "$filename" --strip-components 1 -C etcd
install etcd/etcdctl /usr/local/bin
rm -rf "$filename" etcd

h2 "Configure envs to access etcd"
cat >/etc/profile.d/etcdctl.sh <<'EOF'
export ETCDCTL_CACERT=/var/lib/rancher/rke2/server/tls/etcd/server-ca.crt
export ETCDCTL_CERT=/var/lib/rancher/rke2/server/tls/etcd/server-client.crt
export ETCDCTL_KEY=/var/lib/rancher/rke2/server/tls/etcd/server-client.key
EOF