stages:
  - build
  - push
  - deploy

variables:
  DOCKER_DRIVER: overlay2
  IMAGE_BACKEND: $CI_REGISTRY/$CI_PROJECT_PATH/backend
  IMAGE_FRONTEND: $CI_REGISTRY/$CI_PROJECT_PATH/frontend

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

# BUILD BACKEND
build-backend:
  stage: build
  script:
    - |
      if [[ "$CI_COMMIT_BRANCH" == "main" ]]; then
        TAG="prod-latest"
        ENVIRONMENT="prod"
      elif [[ "$CI_COMMIT_BRANCH" == "staging" ]]; then
        TAG="staging-latest"
        ENVIRONMENT="stag"
      else
        TAG="dev-latest"
        ENVIRONMENT="dev"
      fi
    - echo "Building backend image for $ENVIRONMENT"
    - docker build -t $IMAGE_BACKEND:$TAG employee-be
  only:
    - main
    - staging
    - dev

# BUILD FRONTEND
build-frontend:
  stage: build
  script:
    - |
      if [[ "$CI_COMMIT_BRANCH" == "main" ]]; then
        TAG="prod-latest"
        ENVIRONMENT="prod"
      elif [[ "$CI_COMMIT_BRANCH" == "staging" ]]; then
        TAG="staging-latest"
        ENVIRONMENT="stag"
      else
        TAG="dev-latest"
        ENVIRONMENT="dev"
      fi
    - echo "Building frontend image for $ENVIRONMENT"
    - docker build -t $IMAGE_FRONTEND:$TAG employee-fe
  only:
    - main
    - staging
    - dev

# PUSH IMAGES TO REGISTRY
push-images:
  stage: push
  script:
    - |
      if [[ "$CI_COMMIT_BRANCH" == "main" ]]; then
        TAG="prod-latest"
      elif [[ "$CI_COMMIT_BRANCH" == "staging" ]]; then
        TAG="staging-latest"
      else
        TAG="dev-latest"
      fi
    - echo "Pushing images with tag $TAG..."
    - docker push $IMAGE_BACKEND:$TAG
    - docker push $IMAGE_FRONTEND:$TAG
  only:
    - main
    - staging
    - dev

# DEPLOY USING KUSTOMIZE

deploy:
  stage: deploy
  image:
    name: bitnami/kubectl:latest
    entrypoint: [""]
  script:
    - echo "$KUBECONFIG_DATA" | base64 -d > kubeconfig.yaml
    - export KUBECONFIG=$(pwd)/kubeconfig.yaml
    - |
      if [[ "$CI_COMMIT_BRANCH" == "main" ]]; then
        ENVIRONMENT="prod"
      elif [[ "$CI_COMMIT_BRANCH" == "staging" ]]; then
        ENVIRONMENT="stag"
      else
        ENVIRONMENT="dev"
      fi
    - echo "Deploying to $ENVIRONMENT environment..."
    - kubectl apply -k employee-manifest/overlays/$ENVIRONMENT
  only:
    - main
    - staging
    - dev