name: Validate alert rules

on:
  pull_request:
    paths:
      - 'rules/**'

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Install promtool
        run: |
          PROM_VERSION="2.51.0"
          wget -q https://github.com/prometheus/prometheus/releases/download/v${PROM_VERSION}/prometheus-${PROM_VERSION}.linux-amd64.tar.gz
          tar xf prometheus-*.tar.gz
          sudo mv prometheus-*/promtool /usr/local/bin/

      - name: Validate rules
        run: |
          for f in rules/*.yaml; do
            echo "→ Validation de $f"
            python3 -c "
          import yaml, sys
          with open('$f') as fh:
              doc = yaml.safe_load(fh)
          groups = doc.get('spec', doc).get('groups', [])
          print(yaml.dump({'groups': groups}))
          " > /tmp/rules-flat.yaml
            promtool check rules /tmp/rules-flat.yaml
          done