stages:
  - build

variables:
  DOCKER_BUILDKIT: "1"
  COMPOSE_DOCKER_CLI_BUILD: "1"
  DOCKER_DRIVER: overlay2
  IMAGE_NAME: "$CI_REGISTRY_IMAGE/web-lti:development_${CI_COMMIT_SHORT_SHA}"
  NPM_CACHE_DIR: "$CI_PROJECT_DIR/.npm"

cache:
  key: npm-cache
  paths:
    - .npm/

build-image:
  stage: build
  image: docker:27.0.3
  services:
    - docker:dind

  before_script:
    - echo "Logging in to GitLab Container Registry..."
    - echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" --password-stdin "$CI_REGISTRY"

  script:
    - echo "Building optimized Docker image..."
    - docker build --build-arg BUILDKIT_INLINE_CACHE=1 --cache-from $CI_REGISTRY_IMAGE/web-lti:latest -t "$IMAGE_NAME" .
    - docker push "$IMAGE_NAME"
    - echo "Cleaning old images (keep last 3)..."
    - docker image prune -af --filter "until=72h"

  after_script: "echo 'Build complete: $IMAGE_NAME'"

  rules:
    - if: '$CI_COMMIT_BRANCH == "development"'