name: 'Docker Build and Push'
description: 'Extracts metadata and builds/pushes a Docker image'

inputs:
  registry_image:
    description: 'The registry and image name to tag (e.g., ghcr.io/user/repo)'
    required: true
  file:
    description: 'Path to the Dockerfile'
    required: false
    default: 'Dockerfile'
  platforms:
    description: 'Comma-separated list of platforms to build for'
    required: false
    default: 'linux/amd64'
  context:
    description: 'Build context path'
    required: false
    default: '.'

runs:
  using: "composite"
  steps:
    - name: Extract metadata (tags, labels) for Docker
      id: meta
      uses: docker/metadata-action@v6
      with:
        images: ${{ inputs.registry_image }}

    - name: Build and push Docker image
      uses: docker/build-push-action@v6
      with:
        context: ${{ inputs.context }}
        file: ${{ inputs.file }}
        platforms: ${{ inputs.platforms }}
        push: true
        tags: ${{ steps.meta.outputs.tags }}
        labels: ${{ steps.meta.outputs.labels }}