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

NAMESPACE=go-insane-prd
REGISTRY=nexus.urpi.be
CERT_MANAGER_VERSION=v1.19.1
LOCAL_PATH_VERSION=v0.0.37
LOCK_NAME=forgejo-prd-deploy-lock

if [[ $# -lt 4 ]]; then
  echo "Usage: $0 <chart> <release> <image-name> <image-tag> [helm args...]" >&2
  exit 2
fi
CHART=$1
RELEASE=$2
IMAGE_NAME=$3
IMAGE_TAG=$4
shift 4

: "${KUBECONFIG_PRD:?Set the Forgejo secret KUBECONFIG_PRD to the PRD kubeconfig contents}"
: "${NEXUS_USERNAME:?Set the Forgejo secret NEXUS_USERNAME}"
: "${NEXUS_PASSWORD:?Set the Forgejo secret NEXUS_PASSWORD}"

KUBECONFIG="${RUNNER_TEMP:-/tmp}/kubeconfig-prd-${GITHUB_RUN_ID:-$$}"
umask 077
printf '%s\n' "$KUBECONFIG_PRD" > "$KUBECONFIG"
export KUBECONFIG
LOCK_ACQUIRED=false
cleanup() {
  if [[ "$LOCK_ACQUIRED" == true ]]; then kubectl -n "$NAMESPACE" delete configmap "$LOCK_NAME" --ignore-not-found --wait=false >/dev/null 2>&1 || true; fi
  rm -f "$KUBECONFIG"
}
trap cleanup EXIT

secret_value() {
  local name=$1 key=$2 encoded
  encoded="$(kubectl -n "$NAMESPACE" get secret "$name" -o go-template="{{index .data \"${key}\"}}" 2>/dev/null || true)"
  [[ -z "$encoded" || "$encoded" == "<no value>" ]] && return 0
  printf '%s' "$encoded" | base64 -d 2>/dev/null || true
}

kubectl get --raw=/readyz >/dev/null

# Create the workload namespace and its Nexus pull credential idempotently.
kubectl create namespace "$NAMESPACE" --dry-run=client -o yaml | kubectl apply -f -
for attempt in {1..360}; do
  if kubectl -n "$NAMESPACE" create configmap "$LOCK_NAME" --from-literal=owner="${GITHUB_REPOSITORY:-local}:${GITHUB_RUN_ID:-$$}" >/dev/null 2>&1; then LOCK_ACQUIRED=true; break; fi
  sleep 5
done
if [[ "$LOCK_ACQUIRED" != true ]]; then echo "Timed out waiting for another go-insane-prd deploy to release its lock." >&2; exit 1; fi
kubectl -n "$NAMESPACE" create secret docker-registry nexus-registry \
  --docker-server="$REGISTRY" \
  --docker-username="$NEXUS_USERNAME" \
  --docker-password="$NEXUS_PASSWORD" \
  --dry-run=client -o yaml | kubectl apply -f -

# Stateful charts use the cluster default StorageClass. Install the Rancher local
# path provisioner only when the cluster has no default class at all.
DEFAULT_STORAGE_CLASS="$(kubectl get storageclass -o=jsonpath='{range .items[*]}{.metadata.name}{" "}{.metadata.annotations.storageclass\.kubernetes\.io/is-default-class}{"\n"}{end}' | awk '$2 == "true" { print $1; exit }')"
if [[ -z "$DEFAULT_STORAGE_CLASS" ]]; then
  if ! kubectl get storageclass local-path >/dev/null 2>&1 || ! kubectl -n local-path-storage get deployment local-path-provisioner >/dev/null 2>&1; then
    kubectl apply -f "https://raw.githubusercontent.com/rancher/local-path-provisioner/${LOCAL_PATH_VERSION}/deploy/local-path-storage.yaml"
    kubectl -n local-path-storage rollout status deployment/local-path-provisioner --timeout=5m
  fi
  kubectl annotate storageclass local-path storageclass.kubernetes.io/is-default-class=true --overwrite
fi

# Applications' production charts request nginx ingress and Let's Encrypt TLS.
# Install only missing cluster prerequisites; leave existing installations intact.
if ! kubectl get ingressclass nginx >/dev/null 2>&1; then
  helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx --force-update
  helm repo update ingress-nginx
  helm upgrade --install ingress-nginx ingress-nginx/ingress-nginx \
    --namespace ingress-nginx --create-namespace \
    --set controller.service.type=NodePort \
    --set controller.hostPort.enabled=true \
    --set controller.kind=DaemonSet \
    --set controller.admissionWebhooks.enabled=false \
    --wait --timeout 10m
fi

if ! kubectl get crd clusterissuers.cert-manager.io >/dev/null 2>&1 || ! kubectl -n cert-manager get deployment cert-manager >/dev/null 2>&1; then
  kubectl apply --validate=false -f "https://github.com/cert-manager/cert-manager/releases/download/${CERT_MANAGER_VERSION}/cert-manager.yaml"
  kubectl -n cert-manager rollout status deployment/cert-manager --timeout=5m
  kubectl -n cert-manager rollout status deployment/cert-manager-cainjector --timeout=5m
  kubectl -n cert-manager rollout status deployment/cert-manager-webhook --timeout=5m
fi

if ! kubectl get clusterissuer letsencrypt-prod >/dev/null 2>&1; then
  kubectl apply -f - <<'ISSUER'
apiVersion: cert-manager.io/v1
kind: ClusterIssuer
metadata:
  name: letsencrypt-prod
spec:
  acme:
    server: https://acme-v02.api.letsencrypt.org/directory
    email: admin@urpi.be
    privateKeySecretRef:
      name: letsencrypt-prod
    solvers:
      - http01:
          ingress:
            class: nginx
ISSUER
fi
kubectl wait --for=condition=Ready clusterissuer/letsencrypt-prod --timeout=2m

if [[ ! -d "$CHART" ]]; then
  echo "Helm chart not found: $CHART" >&2
  exit 1
fi
if [[ -f "$CHART/Chart.lock" ]]; then helm dependency build "$CHART"; fi
HELM_ARGS=(
  --namespace "$NAMESPACE"
  --create-namespace
)
if [[ "$RELEASE" != go-guess ]]; then
  HELM_ARGS+=(--set-string "image.repository=${REGISTRY}/docker-hosted/${IMAGE_NAME}" --set-string "image.tag=${IMAGE_TAG}")
fi
if [[ -f "$CHART/values-prd.yaml" ]]; then
  HELM_ARGS+=(--values "$CHART/values-prd.yaml")
fi
case "$RELEASE" in
  go-loose)
    if ! kubectl -n "$NAMESPACE" get secret go-loose-runtime >/dev/null 2>&1; then
      db_password="$(secret_value go-loose-postgresql postgres-password)"
      if [[ -z "$db_password" ]] && kubectl -n "$NAMESPACE" get pvc -o name | grep -Eq 'go-loose.*postgresql|data-go-loose'; then
        echo "Existing go-loose database storage has no recoverable password secret; refusing to rotate its credentials." >&2
        exit 1
      fi
      [[ -n "$db_password" ]] || db_password="$(openssl rand -hex 24)"
      session_secret="$(secret_value go-loose-env GO_LOOSE_SESSION_SECRET)"
      [[ -n "$session_secret" ]] || session_secret="$(openssl rand -hex 32)"
      kubectl -n "$NAMESPACE" create secret generic go-loose-runtime --from-literal=postgresql-password="$db_password" --from-literal=session-secret="$session_secret"
    fi
    db_password="$(secret_value go-loose-runtime postgresql-password)"
    session_secret="$(secret_value go-loose-runtime session-secret)"
    database_url="postgres://goloose:${db_password}@go-loose-postgresql:5432/goloose?sslmode=disable"
    HELM_ARGS+=(--set-string "postgresql.auth.password=${db_password}" --set-string "envSecrets.GO_LOOSE_DATABASE_URL=${database_url}" --set-string "envSecrets.GO_LOOSE_SESSION_SECRET=${session_secret}")
    ;;
  go-mad)
    if ! kubectl -n "$NAMESPACE" get secret go-mad-runtime >/dev/null 2>&1; then
      db_password="$(secret_value go-mad-postgresql password)"
      [[ -n "$db_password" ]] || db_password="$(secret_value go-mad-postgresql postgres-password)"
      if [[ -z "$db_password" ]] && kubectl -n "$NAMESPACE" get pvc -o name | grep -Eq 'go-mad.*postgresql|data-go-mad'; then
        echo "Existing go-mad database storage has no recoverable password secret; refusing to rotate its credentials." >&2
        exit 1
      fi
      [[ -n "$db_password" ]] || db_password="$(openssl rand -hex 24)"
      kubectl -n "$NAMESPACE" create secret generic go-mad-runtime --from-literal=postgresql-password="$db_password" --from-literal=jwt-secret="$(openssl rand -hex 32)"
    fi
    db_password="$(secret_value go-mad-runtime postgresql-password)"
    jwt_secret="$(secret_value go-mad-runtime jwt-secret)"
    HELM_ARGS+=(--set-string "postgresql.auth.password=${db_password}" --set-string "go-mad.jwtSecret=${jwt_secret}")
    ;;
  go-first)
    if ! kubectl -n "$NAMESPACE" get secret go-first-runtime >/dev/null 2>&1; then
      kubectl -n "$NAMESPACE" create secret generic go-first-runtime --from-literal=jwt-secret="$(openssl rand -hex 32)"
    fi
    ;;
  go-places)
    : "${GO_LOOSE_JWT_SECRET:?Set Forgejo secret GO_LOOSE_JWT_SECRET to the same signing key used by go-loose}"
    kubectl -n "$NAMESPACE" create secret generic go-loose-jwt --from-literal=secret="$GO_LOOSE_JWT_SECRET" --dry-run=client -o yaml | kubectl apply -f -
    ;;
  go-bananas)
    : "${GO_BANANAS_OIDC_CLIENT_SECRET:?Set Forgejo secret GO_BANANAS_OIDC_CLIENT_SECRET}"
    session_secret="$(secret_value go-bananas-auth session-secret)"
    if [[ -z "$session_secret" ]]; then session_secret="$(openssl rand -hex 32)"; fi
    kubectl -n "$NAMESPACE" create secret generic go-bananas-auth --from-literal=session-secret="$session_secret" --from-literal=oidc-client-secret="$GO_BANANAS_OIDC_CLIENT_SECRET" --dry-run=client -o yaml | kubectl apply -f -
    ;;
esac
helm upgrade --install "$RELEASE" "$CHART" "${HELM_ARGS[@]}" "$@" --wait --timeout 15m

kubectl -n "$NAMESPACE" get deployments,statefulsets,pods,services,ingresses