#!/bin/sh
set -e
set -u

# Deploy the Node.js webinstall (installer server) to a target host.
# Usage: _scripts/deploy-webinstall <host>
#   e.g. _scripts/deploy-webinstall beta.webi.sh
#        _scripts/deploy-webinstall next.webi.sh

fn_main() {
    g_host="${1:-}"
    if test -z "${g_host}"; then
        printf 'Usage: %s <host>\n' "$0" >&2
        printf '  e.g. %s beta.webi.sh\n' "$0" >&2
        exit 1
    fi

    # beta.webi.sh → ~/srv/beta.webinstall.dev/installers/
    # next.webi.sh → ~/srv/next.webinstall.dev/installers/
    b_subdomain="${g_host%%.*}"
    g_dest="~/srv/${b_subdomain}.webinstall.dev/installers/"

    # Verify the build-classifier submodule is populated. rsync will
    # happily push an empty submodule directory, after which Node
    # crashes at startup with `Cannot find module './build-classifier/
    # host-targets.js'`. New worktrees from `git worktree add` don't
    # init submodules by default.
    if ! test -f ./_webi/build-classifier/host-targets.js; then
        printf 'fatal: _webi/build-classifier submodule not initialized\n' >&2
        printf '  run: git submodule update --init _webi/build-classifier\n' >&2
        exit 1
    fi

    printf '%s\n' "Deploying to ${g_host}:${g_dest} ..."

    rsync -avz --delete \
        --exclude='.git' \
        --exclude='node_modules' \
        --exclude='_cache' \
        --exclude='LIVE_cache' \
        --exclude='webicached' \
        --exclude='classify' \
        --exclude='fetchraw' \
        --exclude='inspect' \
        --exclude='e2etest' \
        --exclude='zigtest' \
        --exclude='distributables.csv' \
        --exclude='agents/' \
        ./ "${g_host}:${g_dest}"

    printf '%s\n' "Restarting webinstall ..."

    # shellcheck disable=SC2029
    ssh "${g_host}" "
        . ~/.config/envman/PATH.env 2>/dev/null
        rm -rf ${g_dest}_cache 2>/dev/null
        serviceman restart webinstall
    "

    printf '%s\n' "Waiting for restart ..."
    sleep 3

    fn_smoke_test
}

fn_smoke_test() {
    printf '%s\n' "Smoke testing https://${g_host}/ ..."

    b_headers="$(curl -sI --max-time 5 "https://${g_host}/api/releases/go.json?limit=1")"

    if printf '%s' "${b_headers}" | grep -qi 'X-Robots-Tag: noindex'; then
        printf '%s\n' "  [ok] X-Robots-Tag: noindex"
    else
        printf '%s\n' "  [FAIL] Missing X-Robots-Tag header"
    fi

    if printf '%s' "${b_headers}" | grep -qi 'rel="canonical"'; then
        printf '%s\n' "  [ok] Link: canonical"
    else
        printf '%s\n' "  [FAIL] Missing canonical Link header"
    fi

    b_version="$(curl -sS --max-time 5 "https://${g_host}/api/releases/go.json?limit=1" | jq -r '.[0].version')"
    if test "${b_version}" != "0.0.0" && test -n "${b_version}"; then
        printf '%s\n' "  [ok] API returns go ${b_version}"
    else
        printf '%s\n' "  [FAIL] API returned error or empty for go"
    fi

    b_shebang="$(curl -sS --max-time 5 "https://${g_host}/node" | head -1)"
    if test "${b_shebang}" = "#!/bin/sh"; then
        printf '%s\n' "  [ok] Installer path serves shell script"
    else
        printf '%s\n' "  [FAIL] Installer path unexpected: ${b_shebang}"
    fi

    printf '%s\n' "Done."
}

fn_main "$@"