name: 'Docker Create Manifest'
description: 'Creates and pushes a multi-arch manifest from per-platform digests.'
runs:
  using: 'composite'
  steps:
    - name: Download digests
      uses: actions/download-artifact@v8
      with:
        path: ${{ runner.temp }}/digests
        pattern: digests-*
        merge-multiple: true

    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v3

    - name: Log in to GHCR
      uses: docker/login-action@v3
      with:
        registry: ghcr.io
        username: ${{ inputs.ghcr_username }}
        password: ${{ inputs.ghcr_token }}

    - name: Prepare combined tags (default + ubuntu suffix)
      id: combined_tags
      shell: bash
      run: |
        TAGS="${{ inputs.tags }}"
        # Generate both default tags and ubuntu-suffixed tags
        DEFAULT_TAGS="$TAGS"
        UBUNTU_TAGS=$(echo "$TAGS" | awk -F, '{for(i=1;i<=NF;i++){split($i,a,":"); printf "%s:%s-ubuntu", a[1], a[2]; if(i<NF) printf ","}}')
        COMBINED_TAGS="$DEFAULT_TAGS,$UBUNTU_TAGS"
        echo "combined_tags=$COMBINED_TAGS" >> $GITHUB_OUTPUT

    - name: Create manifest list and push
      shell: bash
      working-directory: ${{ runner.temp }}/digests
      run: |
        TAG_ARGS=$(echo "${{ steps.combined_tags.outputs.combined_tags }}" | tr ',' '\n' | xargs -I {} echo "-t {}" | tr '\n' ' ')
        docker buildx imagetools create $TAG_ARGS \
          $(printf '${{ inputs.image_name }}@sha256:%s ' *)

    - name: Inspect image
      shell: bash
      run: |
        TAG=$(echo "${{ inputs.tags }}" | cut -d',' -f1)
        docker buildx imagetools inspect "$TAG"

inputs:
  ghcr_username:
    required: true
    description: 'GHCR username'
  ghcr_token:
    required: true
    description: 'GHCR token'
  tags:
    required: true
    description: 'Comma-separated list of image tags'
  image_name:
    required: true
    description: 'Image name without tag (e.g. ghcr.io/gameyfin/gameyfin)'