name: 'Docker Build and Push'
description: 'Builds and pushes Docker images to Docker Hub and GHCR with flexible tagging.'
runs:
  using: 'composite'
  steps:
    - name: Set up Docker Buildx
      uses: docker/setup-buildx-action@v3

    - name: Log in to Docker Hub
      uses: docker/login-action@v3
      with:
        username: ${{ inputs.dockerhub_username }}
        password: ${{ inputs.dockerhub_token }}

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

    - name: Build and push Docker image
      uses: docker/build-push-action@v5
      with:
        context: ${{ inputs.context }}
        file: ${{ inputs.dockerfile }}
        platforms: ${{ inputs.platforms }}
        push: true
        tags: ${{ inputs.tags }}
        cache-from: type=gha
        cache-to: type=gha

inputs:
  dockerhub_username:
    required: true
    description: 'Docker Hub username'
  dockerhub_token:
    required: true
    description: 'Docker Hub token'
  ghcr_username:
    required: true
    description: 'GHCR username'
  ghcr_token:
    required: true
    description: 'GHCR token'
  context:
    required: true
    description: 'Build context'
  dockerfile:
    required: true
    description: 'Dockerfile path'
  platforms:
    required: true
    description: 'Platforms to build for'
  tags:
    required: true
    description: 'Comma-separated list of image tags'