# GitLab CI/CD Configuration for Towerops Agent
# Builds and publishes Docker image to GitLab Container Registry

stages:
  - test
  - build
  - release

variables:
  # GitLab Container Registry
  REGISTRY: registry.gitlab.com
  IMAGE_NAME: graham/towerops-agent
  # Docker BuildKit for better caching
  DOCKER_BUILDKIT: 1
  DOCKER_TLS_CERTDIR: "/certs"

# Test stage - compile and check code
test:
  stage: test
  image: rust:1.75-alpine
  before_script:
    - apk add --no-cache musl-dev
  script:
    - cargo check --release
    - cargo fmt -- --check
    - cargo clippy -- -D warnings
  only:
    - branches
    - merge_requests
  cache:
    key: ${CI_COMMIT_REF_SLUG}-cargo
    paths:
      - target/
      - .cargo/

# Build Docker image for branches (test build)
build:test:
  stage: build
  image: docker:24-dind
  services:
    - docker:24-dind
  before_script:
    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
  script:
    - |
      docker build \
        --tag $REGISTRY/$IMAGE_NAME:$CI_COMMIT_REF_SLUG \
        --tag $REGISTRY/$IMAGE_NAME:$CI_COMMIT_SHORT_SHA \
        .
    - docker push $REGISTRY/$IMAGE_NAME:$CI_COMMIT_REF_SLUG
    - docker push $REGISTRY/$IMAGE_NAME:$CI_COMMIT_SHORT_SHA
  only:
    - branches
  except:
    - main
    - tags

# Build and push for main branch
build:main:
  stage: build
  image: docker:24-dind
  services:
    - docker:24-dind
  before_script:
    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
  script:
    - |
      docker build \
        --tag $REGISTRY/$IMAGE_NAME:latest \
        --tag $REGISTRY/$IMAGE_NAME:main-$CI_COMMIT_SHORT_SHA \
        .
    - docker push $REGISTRY/$IMAGE_NAME:latest
    - docker push $REGISTRY/$IMAGE_NAME:main-$CI_COMMIT_SHORT_SHA
    - echo "IMAGE_TAG=latest" >> build.env
  artifacts:
    reports:
      dotenv: build.env
  only:
    - main

# Release build for tags (versioned releases)
release:
  stage: release
  image: docker:24-dind
  services:
    - docker:24-dind
  before_script:
    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
  script:
    - |
      # Extract version from tag (assumes tags like v0.1.0)
      VERSION=${CI_COMMIT_TAG#v}

      docker build \
        --tag $REGISTRY/$IMAGE_NAME:$VERSION \
        --tag $REGISTRY/$IMAGE_NAME:$CI_COMMIT_TAG \
        --tag $REGISTRY/$IMAGE_NAME:latest \
        .

      docker push $REGISTRY/$IMAGE_NAME:$VERSION
      docker push $REGISTRY/$IMAGE_NAME:$CI_COMMIT_TAG
      docker push $REGISTRY/$IMAGE_NAME:latest

      echo "Released version: $VERSION"
      echo "IMAGE_TAG=$VERSION" >> release.env
  artifacts:
    reports:
      dotenv: release.env
  only:
    - tags
  except:
    - branches

# Optional: Multi-architecture build (amd64 + arm64)
# Uncomment if you need ARM support (e.g., for Raspberry Pi)
#
# build:multiarch:
#   stage: build
#   image: docker:24-dind
#   services:
#     - docker:24-dind
#   before_script:
#     - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
#     # Enable buildx for multi-arch
#     - docker buildx create --use --name multiarch-builder
#     - docker buildx inspect --bootstrap
#   script:
#     - |
#       VERSION=${CI_COMMIT_TAG#v}
#
#       docker buildx build \
#         --platform linux/amd64,linux/arm64 \
#         --tag $REGISTRY/$IMAGE_NAME:$VERSION \
#         --tag $REGISTRY/$IMAGE_NAME:latest \
#         --push \
#         .
#   only:
#     - tags