{{/*
Per-instance fully-qualified name. Used as the prefix for every K8s
object in the chart so instances in the same namespace can't collide.
*/}}
{{- define "instance.fullname" -}}
{{- .Values.instance.code | trunc 40 | trimSuffix "-" -}}
{{- end -}}

{{/*
Standard labels applied to every K8s object. Keeps `kubectl get -l`
queries by-instance trivial.
*/}}
{{- define "instance.labels" -}}
app.kubernetes.io/name: odoo
app.kubernetes.io/instance: {{ .Values.instance.code | quote }}
app.kubernetes.io/managed-by: {{ .Release.Service }}
app.kubernetes.io/version: {{ .Values.odoo.tag | quote }}
odoosky.io/component: instance
{{- end -}}

{{/*
Resources for a given role (`odoo` | `postgres`), looked up against
the `sizes` table by `instance.size`. Falls back to "small" if the
operator picked a name that doesn't exist (defensive: a typo
shouldn't blow up the rendered chart).
*/}}
{{- define "instance.resources" -}}
{{- $size := .Values.instance.size | default "small" -}}
{{- $cfg := index .Values.sizes $size | default (index .Values.sizes "small") -}}
{{- toYaml (index $cfg .role) -}}
{{- end -}}

{{/*
Storage size for a given layer (`filestore` | `database`). Resolution
order, most-specific first:
  1. instance.{layer}Storage in the tenant overlay (operator override)
  2. sizes[size].storage.{layer} (per-tier default)
  3. legacy chart-level fallback (.Values.odoo.filestoreSize / .Values.postgres.storage)
This lets operators decouple storage from CPU/RAM tiers — a Small
instance with lots of attachments can have 50 GB filestore without
upgrading to Medium for capacity it doesn't need.
*/}}
{{- define "instance.storage" -}}
{{- $size := .Values.instance.size | default "small" -}}
{{- $tier := index .Values.sizes $size | default (index .Values.sizes "small") -}}
{{- if eq .layer "filestore" -}}
{{-   if .Values.instance.filestoreStorage -}}{{ .Values.instance.filestoreStorage }}{{- else if and $tier.storage $tier.storage.filestore -}}{{ $tier.storage.filestore }}{{- else -}}{{ .Values.odoo.filestoreSize | default "10Gi" }}{{- end -}}
{{- else if eq .layer "database" -}}
{{-   if .Values.instance.dbStorage -}}{{ .Values.instance.dbStorage }}{{- else if and $tier.storage $tier.storage.database -}}{{ $tier.storage.database }}{{- else -}}{{ .Values.postgres.storage | default "10Gi" }}{{- end -}}
{{- end -}}
{{- end -}}

{{/*
Postgres password. Looks up the existing Secret on upgrades; uses
.Values.postgres.password if set; otherwise generates a 32-char
random string on first install. The lookup ensures `helm upgrade`
does NOT silently rotate the password.
*/}}
{{- define "instance.pgPassword" -}}
{{- $existing := lookup "v1" "Secret" .Release.Namespace (printf "%s-pg" .Values.instance.code) -}}
{{- if and $existing $existing.data $existing.data.POSTGRES_PASSWORD -}}
{{- index $existing.data "POSTGRES_PASSWORD" | b64dec -}}
{{- else if .Values.postgres.password -}}
{{- .Values.postgres.password -}}
{{- else -}}
{{- randAlphaNum 32 -}}
{{- end -}}
{{- end -}}