#!/usr/bin/env bash
set -euo pipefail

version=18.12.1
arch="$(uname -m)"

case $arch in
    x86_64)
        tarball="node-v$version-linux-x64.tar.xz"
        sha256=4481a34bf32ddb9a9ff9540338539401320e8c3628af39929b4211ea3552a19e
        ;;

    aarch64)
        tarball="node-v$version-linux-arm64.tar.xz"
        sha256=3904869935b7ecc51130b4b86486d2356539a174d11c9181180cab649f32cd2a
        ;;
esac

check_version() {
    out="$(node --version)" && [ "$out" = "v$version" ]
}

if ! check_version 2>/dev/null; then
    tmpdir="$(mktemp -d)"
    trap 'rm -r "$tmpdir"' EXIT
    cd "$tmpdir"
    curl_opts=(-fLO --retry 3)
    if [ -n "${CUSTOM_CA_CERTIFICATES:-}" ]; then
        curl_opts+=(--cacert "${CUSTOM_CA_CERTIFICATES}")
    fi
    curl "${curl_opts[@]}" "https://nodejs.org/dist/v$version/$tarball"
    sha256sum -c <<<"$sha256 $tarball"
    rm -rf /srv/zulip-node
    mkdir -p /srv/zulip-node
    tar -xJf "$tarball" --no-same-owner --strip-components=1 -C /srv/zulip-node
    ln -sf /srv/zulip-node/bin/{node,npm,npx} /usr/local/bin
    rm -rf /usr/local/nvm
    check_version
fi