#!/usr/bin/env bash
# redis 8.10.1 - 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/timoni-redis-8-10-1-default.json
# Entry page: https://confighub.github.io/helm-expt/site/d/examples/timoni/redis-8-10-1/README.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=./timoni-redis-8-10-1-default-objects
objects_url=https://raw.githubusercontent.com/confighub/helm-expt/main/examples/timoni/redis-8-10-1/rendered/release-objects.yaml
objects_sha256=91059402bdbb37011f40c711297fd3d665f7ffa8eb05fe35487fde252163476b

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 7 objects. The cluster is untouched so far"
rm -rf "$work/docs" "$work/rest"
mkdir -p "$work/docs" "$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 }' "$work/objects.yaml"
for n in 0000 0001 0002 0003 0004 0005 0006; do mv "$work/docs/doc-$n.yaml" "$work/rest/"; done
ls "$work/rest"

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

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

say "Apply the 7 objects"
kubectl apply -f "$work/rest"

say "Done. kubectl applied the 7 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: 3 steps of this entry's plan. The entry page says who runs each one."
cat <<'EOF_NOT_RUN'
   - Apply the ServiceAccount, ConfigMap, master Service, persistent volume claim, and master Deployment first; wait for the master to become ready before continuing.
   - Apply the read-only replica Deployment and Service after the master is ready.
   - Run the generated redis-cli PING Job after apply. The default Catalog selection leaves this test disabled.
EOF_NOT_RUN