name: Chart Test
on:
  push:
    tags:
      - v*
    branches:
      - master
  pull_request:
    branches:
      - master

jobs:
  chart:
    name: Chart

    runs-on: ubuntu-latest
    outputs:
      changed: ${{ steps.changes.outputs.changed }}

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set up Helm
        uses: azure/setup-helm@v4
        with:
          version: v3.10.3

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.10"

      - name: Set up chart-testing
        uses: helm/chart-testing-action@v2.6.1

      - name: Lint
        run: ct lint

      - name: Check generated docs
        run: |
          make docs
          test "$(git diff --name-only)" == "" \
          || ( printf >&2 "\nREADME files are not up to date (run 'make docs'), differences:\n\n%s\n\n" "$(git diff)" ; exit 1 ; )

      - name: Detect changes
        id: changes
        run: |
          changed=$(ct list-changed)
          if [[ -n "$changed" ]]; then
            echo "changed=true" >> $GITHUB_OUTPUT
          fi

  chart-test:
    name: Chart Test
    runs-on: ubuntu-latest
    needs: chart
    if: needs.chart.outputs.changed == 'true'
    strategy:
      fail-fast: false
      matrix:
        kube: ["1.25", "1.29", "1.31"]

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set up Helm
        uses: azure/setup-helm@v4
        with:
          version: v3.10.3

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.10"

      - name: Set up chart-testing
        uses: helm/chart-testing-action@v2.6.1

      # See https://github.com/kubernetes-sigs/kind/releases/tag/v0.17.0
      - name: Determine KinD node image version
        id: node_image
        run: |
          case ${{ matrix.kube }} in
            1.25)
              NODE_IMAGE=kindest/node:v1.25.3@sha256:f52781bc0d7a19fb6c405c2af83abfeb311f130707a0e219175677e366cc45d1 ;;
            1.29)
              NODE_IMAGE=kindest/node:v1.29.12@sha256:62c0672ba99a4afd7396512848d6fc382906b8f33349ae68fb1dbfe549f70dec ;;
            1.31)
              NODE_IMAGE=kindest/node:v1.31.2@sha256:0526eb5cd8d892ed79b56feb48d17eeee1f719f55d5c35cef468f053caffad32 ;;
            esac

            echo "image=$NODE_IMAGE" >> $GITHUB_OUTPUT

      - name: Create KinD cluster
        uses: helm/kind-action@v1.12.0
        with:
          version: v0.17.0
          node_image: ${{ steps.node_image.outputs.image }}

      - name: Test
        run: ct install