#!/usr/bin/env bash
# nvidia/cluster-readiness-engine v0.6.0 - base variant: default
# Path: fetch this entry's retained objects, check their SHA-256, then apply
# them with kubectl. It uses curl, shasum, awk and kubectl. It needs no cub
# CLI and no ConfigHub account.
# Generated by scripts/generate-public-site.mjs from this entry's listing:
# https://confighub.github.io/helm-expt/site/listings/nvidia-cluster-readiness-engine-v0-6-0-default.json
# Entry page: https://confighub.github.io/helm-expt/site/charts/nvidia-cluster-readiness-engine-v0-6-0.html
set -euo pipefail

say() { printf '\n>> %s\n' "$*"; }

for tool in curl awk kubectl; do
  if ! command -v "$tool" >/dev/null 2>&1; then
    printf '%s is required and was not found.\n' "$tool" >&2
    exit 1
  fi
done
if command -v shasum >/dev/null 2>&1; then
  sha256_of() { shasum -a 256 "$1" | awk '{print $1}'; }
elif command -v sha256sum >/dev/null 2>&1; then
  sha256_of() { sha256sum "$1" | awk '{print $1}'; }
else
  printf 'shasum is required and was not found.\n' >&2
  exit 1
fi

work=./nvidia-cluster-readiness-engine-v0-6-0-default-objects
objects_url=https://raw.githubusercontent.com/confighub/helm-expt/main/recipes/nvidia/cluster-readiness-engine/v0.6.0/revisions/default/r001/rendered/release-objects.yaml
objects_sha256=3d7c5f88d97f8f74f84b7ced2ae32d75fceb9888aa4d2701124eb6beea713170

say "Fetch the retained objects into $work/objects.yaml"
mkdir -p "$work"
curl -fsSL -o "$work/objects.yaml" "$objects_url"

say "Check the file against the SHA-256 in the listing"
fetched_sha256="$(sha256_of "$work/objects.yaml")"
if [ "$fetched_sha256" != "$objects_sha256" ]; then
  printf 'The file differs from the listing, so the script stops. Nothing was applied.\n  listing: %s\n  fetched: %s\n' "$objects_sha256" "$fetched_sha256" >&2
  exit 1
fi
printf 'The file matches: sha256 %s\n' "$fetched_sha256"

say "Split the file into its 43 objects. The cluster is untouched so far"
rm -rf "$work/docs" "$work/crds" "$work/rest"
mkdir -p "$work/docs" "$work/crds" "$work/rest"
awk -v dir="$work/docs" 'BEGIN { n = 0; f = sprintf("%s/doc-%04d.yaml", dir, n) } /^---[ \t]*$/ { close(f); n++; f = sprintf("%s/doc-%04d.yaml", dir, n); next } { print > f }' "$work/objects.yaml"
for n in 0002 0004 0006 0008 0010 0012 0014; do mv "$work/docs/doc-$n.yaml" "$work/crds/"; done
for n in 0015 0016 0017 0018 0019 0020 0021 0022 0023 0024 0025 0026; do mv "$work/docs/doc-$n.yaml" "$work/rest/"; done
for n in 0027 0028 0029 0030 0031 0032 0033 0034 0035 0036 0037 0038; do mv "$work/docs/doc-$n.yaml" "$work/rest/"; done
for n in 0039 0040 0041 0042 0043 0044 0045 0048 0049 0050 0051 0052; do mv "$work/docs/doc-$n.yaml" "$work/rest/"; done
ls "$work/crds" "$work/rest"

if [ "${REQUIREMENTS_READY:-0}" != "1" ]; then
  say "Stop before applying anything. This entry's plan has 1 step that an install needs first"
  cat >&2 <<'EOF_REQUIREMENTS'
This script cannot carry out this step of the plan. It is yours to do, with your own values:
  - CRD servicemonitors.monitoring.coreos.com must exist before apply. Prometheus Operator ServiceMonitor CRD required before Kubernetes accepts the rendered ServiceMonitor object; the chart does not ship it.
Nothing was applied. Complete it before you apply the objects.
When it is done, re-run with:
  REQUIREMENTS_READY=1 bash try-objects.sh
EOF_REQUIREMENTS
  exit 1
fi
say "REQUIREMENTS_READY=1 is set. The script takes your word for 1 step and does not check it"

say "Check that kubectl reaches a cluster"
if ! kubectl get --raw /version >/dev/null 2>&1; then
  printf 'kubectl cannot reach a cluster. Point it at a throwaway cluster and re-run this script.\n' >&2
  exit 1
fi
kubectl config current-context 2>/dev/null || true

serves_kind() {
  kubectl api-resources --api-group="$1" --no-headers 2>/dev/null | awk -v kind="$2" '$NF == kind { found = 1 } END { exit found ? 0 : 1 }'
}

say "Check that the cluster serves the 1 kind this file uses and does not define"
missing_kinds=""
if ! serves_kind monitoring.coreos.com ServiceMonitor; then
  missing_kinds="$missing_kinds ServiceMonitor.monitoring.coreos.com"
fi
if [ -n "$missing_kinds" ]; then
  printf 'The cluster does not serve:%s\n' "$missing_kinds" >&2
  printf 'This file uses these kinds and does not define them. Install what defines them, then re-run this script. Nothing was applied.\n' >&2
  exit 1
fi

say "Create the nvcre namespace if it does not exist"
if ! kubectl get namespace nvcre >/dev/null 2>&1; then
  kubectl create namespace nvcre
fi

wait_for_crd() {
  crd_name="$1"
  deadline=$(( $(date +%s) + 180 ))
  until kubectl get "crd/${crd_name}" >/dev/null 2>&1; do
    if [ "$(date +%s)" -ge "$deadline" ]; then
      printf "CRD %s did not appear within 180 seconds.\n" "$crd_name" >&2
      return 1
    fi
    sleep 2
  done
  kubectl wait --for=condition=Established --timeout=120s "crd/${crd_name}"
}

say "Check the 7 CRDs this file holds"
missing_crds=0
if ! kubectl get crd/bandwidthmeasurements.nvcre.nvidia.com >/dev/null 2>&1; then
  missing_crds=1
fi
if ! kubectl get crd/certifications.nvcre.nvidia.com >/dev/null 2>&1; then
  missing_crds=1
fi
if ! kubectl get crd/goodputmeasurements.nvcre.nvidia.com >/dev/null 2>&1; then
  missing_crds=1
fi
if ! kubectl get crd/jobs.nvcre.nvidia.com >/dev/null 2>&1; then
  missing_crds=1
fi
if ! kubectl get crd/logprofiles.nvcre.nvidia.com >/dev/null 2>&1; then
  missing_crds=1
fi
if ! kubectl get crd/workflows.nvcre.nvidia.com >/dev/null 2>&1; then
  missing_crds=1
fi
if ! kubectl get crd/workloadruns.nvcre.nvidia.com >/dev/null 2>&1; then
  missing_crds=1
fi
if [ "$missing_crds" -eq 1 ]; then
  say "A CRD is missing, so apply the file's CRDs first"
  kubectl apply --server-side -f "$work/crds"
  crd_outcome="were applied first"
elif kubectl diff --server-side -f "$work/crds" >/dev/null 2>&1; then
  say "The CRDs already exist and match this file. The script leaves them under their current owner"
  crd_outcome="already existed and matched, so the script left them alone"
elif [ "${APPLY_CRDS:-0}" = "1" ]; then
  say "The existing CRDs differ from this file. APPLY_CRDS=1 is set, so the script applies the file's CRDs"
  kubectl apply --server-side -f "$work/crds"
  crd_outcome="differed and were applied, because APPLY_CRDS=1 was set"
else
  say "The CRDs already exist and differ from this file, or another tool owns them"
  cat <<'EOF_CRDS'
This script does not change CRDs it did not just create.
If this is an upgrade, the objects that follow may need the newer CRDs.
To let this script apply the file's CRDs, re-run with:
  APPLY_CRDS=1 bash try-objects.sh
EOF_CRDS
  exit 1
fi
wait_for_crd bandwidthmeasurements.nvcre.nvidia.com
wait_for_crd certifications.nvcre.nvidia.com
wait_for_crd goodputmeasurements.nvcre.nvidia.com
wait_for_crd jobs.nvcre.nvidia.com
wait_for_crd logprofiles.nvcre.nvidia.com
wait_for_crd workflows.nvcre.nvidia.com
wait_for_crd workloadruns.nvcre.nvidia.com

say "Apply the other 36 objects"
kubectl apply -f "$work/rest"

say "Done. The 7 CRDs $crd_outcome. kubectl applied the other 36 objects of this entry's retained file."
say "The script stops here. It did not wait for any workload to start"
say "Not run by this script: 1 step of this entry's plan. The entry page says who runs it."
cat <<'EOF_NOT_RUN'
   - CRD servicemonitors.monitoring.coreos.com must exist before apply. Prometheus Operator ServiceMonitor CRD required before Kubernetes accepts the rendered ServiceMonitor object; the chart does not ship it.
EOF_NOT_RUN