---
name: Reusable workflow to test container images
on:
  workflow_call:
    inputs:
      registry:
        description: The registry to pull the images to test from.
        type: string
        required: true
      username:
        description: The username for authentication with the registry.
        type: string
        required: true
      image:
        description: The name of the image to pull from the registry for testing.
        type: string
        required: true
      image-tag:
        description: The tag of the image to pull from the registry for testing.
        type: string
        required: true
      environment:
        description: The Github environment to run this workflow on.
        type: string
        required: false
      ref:
        description: The commit, tag or branch to checkout for testing scripts.
        type: string
        default: master
        required: false
    secrets:
      token:
        description: The Github token or similar to authenticate with for the registry.
        required: true
      cosign_key:
        description: The optional Cosign key to use for verifying the images.
        required: false
jobs:
  call-test-images-cosign-verify:
    name: Cosign verification of container image
    environment: ${{ inputs.environment }}
    runs-on: ubuntu-latest
    steps:
      - name: Install cosign
        uses: sigstore/cosign-installer@v2

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ inputs.registry }}
          username: ${{ inputs.username }}
          password: ${{ secrets.token }}

      # There is currently no way to verify a local image, e.g. for a particular architecture
      # https://github.com/sigstore/cosign/issues/60
      - name: Verify image with a key
        # Only key-based verification currently
        if: ${{ env.COSIGN_PUBLIC_KEY }}
        run: |
          echo -e "${COSIGN_PUBLIC_KEY}" > /tmp/my_cosign.pub
          cosign verify --key /tmp/my_cosign.pub "$REGISTRY/$IMAGE_NAME:$IMAGE_TAG"
          rm -f /tmp/my_cosign.key
        shell: bash
        env:
          COSIGN_PUBLIC_KEY: ${{ secrets.cosign_key }}
          REGISTRY: ${{ inputs.registry }}
          IMAGE_NAME: ${{ inputs.image }}
          IMAGE_TAG: ${{ inputs.image-tag }}

  call-test-images-container-architecture:
    name: ${{ matrix.arch }} image architecture verification
    runs-on: ubuntu-latest
    environment: ${{ inputs.environment }}
    # Test as much as we can
    continue-on-error: true
    strategy:
      fail-fast: false
      matrix:
        arch: [ linux/amd64, linux/arm64, linux/arm/v7 ]
        include:
          # Rather than extract the specific central arch we just provide it
          - arch: linux/amd64
            expected: amd64
          - arch: linux/arm64
            expected: arm64
          - arch: linux/arm/v7
            expected: arm
    steps:
      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ inputs.registry }}
          username: ${{ inputs.username }}
          password: ${{ secrets.token }}

      - name: Pull and extract architecture of image
        id: extract_arch
        run: |
          docker pull --platform=${{ matrix.arch }} "$REGISTRY/$IMAGE_NAME:$IMAGE_TAG"
          ACTUAL_ARCH=$(docker image inspect --format '{{.Architecture}}' "$REGISTRY/$IMAGE_NAME:$IMAGE_TAG")
          echo "ACTUAL_ARCH=$ACTUAL_ARCH" >> $GITHUB_OUTPUT
          docker image inspect "$REGISTRY/$IMAGE_NAME:$IMAGE_TAG"
        shell: bash
        env:
          REGISTRY: ${{ inputs.registry }}
          IMAGE_NAME: ${{ inputs.image }}
          IMAGE_TAG: ${{ inputs.image-tag }}

      - name: Validate architecture of image
        run: |
          if [[ "$ACTUAL_ARCH" != "$EXPECTED_ARCH" ]]; then
            echo "Invalid architecture for $REGISTRY/$IMAGE_NAME: $ACTUAL_ARCH != $EXPECTED_ARCH"
            exit 1
          fi
        env:
          EXPECTED_ARCH: ${{ matrix.expected }}
          ACTUAL_ARCH: ${{ steps.extract_arch.outputs.ACTUAL_ARCH }}
        shell: bash

  call-test-images-container-smoke:
    # Ensure each architecture container runs up correctly with default configuration.
    name: ${{ matrix.arch }} smoke test for local container images
    runs-on: ubuntu-latest
    environment: ${{ inputs.environment }}
    # No point running if the architecture is incorrect
    needs: [ call-test-images-container-architecture ]
    continue-on-error: true
    strategy:
      fail-fast: false # verify all
      matrix:
        arch: [ linux/amd64, linux/arm64, linux/arm/v7 ]
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          ref: ${{ inputs.ref }}

      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ inputs.registry }}
          username: ${{ inputs.username }}
          password: ${{ secrets.token }}

      - name: Set up QEMU using standard action
        if: ${{ matrix.arch != 'linux/arm64' }}
        uses: docker/setup-qemu-action@v3

      # Without this QEMU fails for ARM64
      - name: Set up binary emulation for QEMU
        if: ${{ matrix.arch == 'linux/arm64' }}
        run: |
          docker run --privileged --rm tonistiigi/binfmt --install all

      - name: Verify platform is supported with Alpine container
        # We make sure there is not an inherent issue with this architecture on this runner
        run: |
          docker run --rm --platform=${{ matrix.arch }} alpine uname -a

      - name: Test the HTTP server is responding
        timeout-minutes: 10
        run: |
          packaging/testing/smoke/container/container-smoke-test.sh
        shell: bash
        env:
          CONTAINER_NAME: local-smoke-${{ matrix.arch }}
          CONTAINER_ARCH: ${{ matrix.arch }}
          REGISTRY: ${{ inputs.registry }}
          IMAGE_NAME: ${{ inputs.image }}
          IMAGE_TAG: ${{ inputs.image-tag }}

  call-test-images-k8s-smoke:
    # No need to test every architecture here, that is covered by local container tests.
    # Testing helm chart deployment on KIND here.
    name: Helm chart test on KIND
    environment: ${{ inputs.environment }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          ref: ${{ inputs.ref }}

      - name: Create k8s Kind Cluster
        uses: helm/kind-action@v1.8.0

      - name: Set up Helm
        uses: azure/setup-helm@v3.5
        with:
          version: v3.6.3

      - name: Set up Kubectl
        uses: azure/setup-kubectl@v3.2

      - name: Test the HTTP server is responding
        timeout-minutes: 5
        run: |
          packaging/testing/smoke/k8s/k8s-smoke-test.sh
        shell: bash
        env:
          NAMESPACE: default
          REGISTRY: ${{ inputs.registry }}
          IMAGE_NAME: ${{ inputs.image }}
          IMAGE_TAG: ${{ inputs.image-tag }}