name: Deploy grafana resources
permissions:
  contents: read

on:
  pull_request:
    paths:
      - 'internal/grafana/**'
      - '.github/workflows/deploy-grafana.yml'
  push:
    branches:
      - main
    paths:
      - 'internal/grafana/**'
      - '.github/workflows/deploy-grafana.yml'

defaults:
  run:
    shell: bash

env:
  GCX_VERSION: 1.0.0
  GCX_SHA256: c88c65958d19d83dc3a192a2a5037e08307a9c776019f24249b89f369c9c4d41

jobs:
  deploy:
    name: ${{ github.event_name == 'push' && 'Deploy grafana resources' || 'Validate grafana resources (dry run)' }}
    # Validate and push both need the Grafana secrets, which fork PRs don't get.
    if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name == github.repository
    timeout-minutes: 10
    runs-on: ubuntu-latest
    concurrency: grafana-deploy-${{ github.event_name == 'push' && 'main' || github.ref }}

    steps:
      - name: Check out code
        uses: actions/checkout@v6

      - name: Install gcx
        run: |
          curl -fsSL -o gcx.tar.gz "https://github.com/grafana/gcx/releases/download/v${GCX_VERSION}/gcx_${GCX_VERSION}_linux_amd64.tar.gz"
          echo "${GCX_SHA256}  gcx.tar.gz" | sha256sum -c -
          tar xzf gcx.tar.gz gcx
          sudo mv gcx /usr/local/bin/gcx
          gcx --version

      - name: Validate resources
        run: gcx resources validate -p internal/grafana/resources
        env:
          GRAFANA_SERVER: ${{ secrets.GRAFANA_SERVER }}
          GRAFANA_TOKEN: ${{ secrets.GRAFANA_TOKEN }}

      - name: Dry run
        if: github.event_name == 'pull_request'
        run: gcx resources push -p internal/grafana/resources --dry-run --on-error abort
        env:
          GRAFANA_SERVER: ${{ secrets.GRAFANA_SERVER }}
          GRAFANA_TOKEN: ${{ secrets.GRAFANA_TOKEN }}

      # Everything except alert rules, folders first. Two orderings matter and neither is
      # the alphabetical one this glob would otherwise give: folders have to exist before
      # anything annotated into them, and alert rules go last (see the step below for why).
      # A commit adding a folder and a dashboard inside it lands both in one push, so the
      # folder cannot be assumed to already be there.
      - name: Push resources
        if: github.event_name == 'push'
        run: |
          shopt -s nullglob
          for dir in internal/grafana/resources/*folders*/; do
            gcx resources push -p "$dir" --on-error abort
          done
          for dir in internal/grafana/resources/*/; do
            case "$dir" in *folders*|*alertrules*) continue ;; esac
            gcx resources push -p "$dir" --on-error abort
          done
        env:
          GRAFANA_SERVER: ${{ secrets.GRAFANA_SERVER }}
          GRAFANA_TOKEN: ${{ secrets.GRAFANA_TOKEN }}

      # Alert rules are the one resource type that can fail here having passed the PR
      # dry run, because alerting has no server-side dry-run — the PR reports them as
      # "skipped". A newly created rule carrying group labels is rejected outright
      # ("cannot set group when creating a new rule"), so the first time any new rule
      # lands, this step is where it surfaces. Kept last and separate so that failure
      # costs the rule, not every dashboard in the tree. Still fails the job.
      - name: Push alert rules
        if: github.event_name == 'push'
        run: |
          shopt -s nullglob
          for dir in internal/grafana/resources/*alertrules*/; do
            gcx resources push -p "$dir" --on-error abort
          done
        env:
          GRAFANA_SERVER: ${{ secrets.GRAFANA_SERVER }}
          GRAFANA_TOKEN: ${{ secrets.GRAFANA_TOKEN }}

      # Notification templates can't go through `gcx resources push` — gcx's discovery
      # registry ignores the notifications.alerting.grafana.app API group entirely — so
      # template files live in templates/ (not resources/) and go through the classic
      # provisioning API. The PUT is idempotent and sets `api` provenance, which locks
      # UI edits the same way provisioned resources are locked.
      - name: Push notification templates
        if: github.event_name == 'push'
        run: |
          shopt -s nullglob
          for f in internal/grafana/templates/*.gotmpl; do
            name=$(basename "$f" .gotmpl)
            jq -Rs '{template: .}' "$f" | curl -fsS -X PUT \
              "$GRAFANA_SERVER/api/v1/provisioning/templates/$name" \
              -H "Authorization: Bearer $GRAFANA_TOKEN" \
              -H "Content-Type: application/json" \
              -d @- > /dev/null
          done
        env:
          GRAFANA_SERVER: ${{ secrets.GRAFANA_SERVER }}
          GRAFANA_TOKEN: ${{ secrets.GRAFANA_TOKEN }}