name: Find latest image
description: 'Find the latest image reference for a given ref/stream.'

inputs:
  git-ref:
    description: 'Git ref to checkout.'
  imageVersion:
    description: 'Image version to use. If set, no image will be searched for and the specified image will be returned.'
  ref:
    description: 'The ref the image was built on. (e.g. "main")'
    default: 'main'
  stream:
    description: 'The publication stream of the image. (e.g. "debug")'
    default: 'debug'

outputs:
  image:
    description: "Image reference to be used in the cluster."
    value: ${{ steps.find-latest-image.outputs.output }}${{ steps.use-given-image.outputs.output }}
  isDebugImage:
    description: "Whether the image is a debug image."
    value: ${{ steps.isDebugImage.outputs.isDebugImage }}

runs:
  using: 'composite'
  steps:
    - name: Checkout head
      if: inputs.imageVersion == '' && inputs.git-ref == 'head'
      uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
      with:
        ref: ${{ !github.event.pull_request.head.repo.fork && github.head_ref || '' }}

    - name: Checkout ref
      if: inputs.imageVersion == '' && inputs.git-ref != 'head'
      uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
      with:
        ref: ${{ inputs.git-ref }}

    - name: Login to AWS
      if: inputs.imageVersion == ''
      uses: aws-actions/configure-aws-credentials@e3dd6a429d7300a6a4c196c26e071d42e0343502 # v4.0.2
      with:
        role-to-assume: arn:aws:iam::795746500882:role/GithubConstellationVersionsAPIRead
        aws-region: eu-central-1

    - uses: ./.github/actions/setup_bazel_nix

    - name: Find latest image
      id: find-latest-image
      if: inputs.imageVersion == ''
      uses: ./.github/actions/versionsapi
      with:
        command: latest
        ref: ${{ inputs.ref }}
        stream: ${{ inputs.stream }}

    - name: Use given image
      id: use-given-image
      if: inputs.imageVersion != ''
      shell: bash
      run: |
        echo "output=${{ inputs.imageVersion }}" | tee -a "$GITHUB_OUTPUT"

    - name: Is debug image?
      id: isDebugImage
      shell: bash
      run: |
        case "${{ inputs.imageVersion }}" in
          "")
            echo "isDebugImage=true" | tee -a "$GITHUB_OUTPUT"
            ;;
          *"/stream/debug/"*)
            echo "isDebugImage=true" | tee -a "$GITHUB_OUTPUT"
            ;;
          *)
            echo "isDebugImage=false" | tee -a "$GITHUB_OUTPUT"
            ;;
        esac