variables:
  # Enable Docker BuildKit for multi-arch builds
  DOCKER_BUILDKIT: 1
  IMAGE_NAME: $CI_REGISTRY_IMAGE

stages:
  - build

build-and-push:
  stage: build
  image: docker:24.0.5
  services:
    - docker:24.0.5-dind
  before_script:
    # Log into the GitLab Container Registry using provided CI/CD variables
    - echo "$CI_REGISTRY_PASSWORD" | docker login $CI_REGISTRY -u "$CI_REGISTRY_USER" --password-stdin
    
    # Set up QEMU for multi-architecture builds (equivalent to setup-qemu-action)
    - docker run --privileged --rm tonistiigi/binfmt --install all
    
    # Create and boot a new builder instance (equivalent to setup-buildx-action)
    - docker buildx create --use --name multi-arch-builder
    - docker buildx inspect --bootstrap
  script:
    # Determine the tags based on the trigger event (Release tag vs Manual branch run)
    - |
      if [ -n "$CI_COMMIT_TAG" ]; then
        # If triggered by a tag (release), build with the specific version and 'latest'
        TAG_ARGS="-t $IMAGE_NAME:$CI_COMMIT_TAG -t $IMAGE_NAME:latest"
      else
        # If triggered manually on a branch, use the branch name as the tag
        TAG_ARGS="-t $IMAGE_NAME:$CI_COMMIT_REF_SLUG"
      fi
    
    # Build and push the Docker image for both amd64 and arm64 architectures
    - docker buildx build --push --platform linux/amd64,linux/arm64 $TAG_ARGS .
  rules:
    # Trigger automatically when pushing to main branch
    - if: $CI_COMMIT_BRANCH == "main"
    # Trigger automatically when a new tag is pushed
    - if: $CI_COMMIT_TAG
    # Allow manual triggering from the GitLab Web UI
    - if: $CI_PIPELINE_SOURCE == "web"