stages:
  - test
  - build
  - deploy

variables:
  DOCKER_IMAGE: yourusername/discord-bot-v2
  DOCKER_DRIVER: overlay2
  # Semantic versioning - update these for releases
  VERSION_MAJOR: "2"
  VERSION_MINOR: "1"

# Test on all branches
test:
  stage: test
  image: python:3.11-slim
  before_script:
    - cd discord-app-v2
    - pip install --cache-dir .cache/pip -r requirements.txt
  script:
    - python -m pytest --tb=short -q --cov=. --cov-report=term-missing
  cache:
    key: ${CI_COMMIT_REF_SLUG}
    paths:
      - .cache/pip
  only:
    - branches
  artifacts:
    reports:
      coverage_report:
        coverage_format: cobertura
        path: discord-app-v2/coverage.xml

# Build with versioned tags
build:
  stage: build
  image: docker:24-dind
  services:
    - docker:24-dind
  before_script:
    - docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
  script:
    - cd discord-app-v2

    # Calculate version tags
    - export VERSION_PATCH=${CI_PIPELINE_IID}
    - export FULL_VERSION="v${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}"
    - export SHORT_SHA=${CI_COMMIT_SHORT_SHA}
    - export BRANCH_TAG="${CI_COMMIT_REF_SLUG}-${SHORT_SHA}"

    # Build once, tag multiple times
    - |
      docker build \
        --build-arg VERSION=${FULL_VERSION} \
        --build-arg GIT_COMMIT=${CI_COMMIT_SHA} \
        --build-arg BUILD_DATE=$(date -u +"%Y-%m-%dT%H:%M:%SZ") \
        -t ${DOCKER_IMAGE}:${FULL_VERSION} \
        -t ${DOCKER_IMAGE}:${SHORT_SHA} \
        -t ${DOCKER_IMAGE}:${BRANCH_TAG} \
        .

    # Tag as latest only for main branch
    - |
      if [ "$CI_COMMIT_BRANCH" == "main" ]; then
        docker tag ${DOCKER_IMAGE}:${FULL_VERSION} ${DOCKER_IMAGE}:latest
      fi

    # Tag as staging for develop branch
    - |
      if [ "$CI_COMMIT_BRANCH" == "develop" ]; then
        docker tag ${DOCKER_IMAGE}:${FULL_VERSION} ${DOCKER_IMAGE}:staging
      fi

    # Push all tags
    - docker push ${DOCKER_IMAGE}:${FULL_VERSION}
    - docker push ${DOCKER_IMAGE}:${SHORT_SHA}
    - docker push ${DOCKER_IMAGE}:${BRANCH_TAG}
    - |
      if [ "$CI_COMMIT_BRANCH" == "main" ]; then
        docker push ${DOCKER_IMAGE}:latest
      fi
    - |
      if [ "$CI_COMMIT_BRANCH" == "develop" ]; then
        docker push ${DOCKER_IMAGE}:staging
      fi

    # Save version info for deployment
    - echo "FULL_VERSION=${FULL_VERSION}" > version.env
    - echo "SHORT_SHA=${SHORT_SHA}" >> version.env
    - echo "BRANCH_TAG=${BRANCH_TAG}" >> version.env

  artifacts:
    reports:
      dotenv: discord-app-v2/version.env

  only:
    - main
    - develop
    - tags

# Deploy to staging (automatic for develop branch)
deploy:staging:
  stage: deploy
  image: alpine:latest
  needs:
    - build
  before_script:
    - apk add --no-cache openssh-client
    - mkdir -p ~/.ssh
    - echo "$SSH_PRIVATE_KEY" | tr -d '\r' > ~/.ssh/id_rsa
    - chmod 600 ~/.ssh/id_rsa
    - ssh-keyscan -H $VPS_HOST >> ~/.ssh/known_hosts
  script:
    - echo "Deploying version ${FULL_VERSION} to staging..."
    - |
      ssh $VPS_USER@$VPS_HOST << EOF
        cd /path/to/discord-bot-staging

        # Backup current version
        docker inspect discord-bot-staging --format='{{.Image}}' > .last_version || true

        # Update docker-compose with specific version
        sed -i 's|image: ${DOCKER_IMAGE}:.*|image: ${DOCKER_IMAGE}:staging|' docker-compose.yml

        # Pull and deploy
        docker-compose pull
        docker-compose up -d

        # Wait for health check
        sleep 10
        if docker-compose ps | grep -q "Up (healthy)"; then
          echo "✅ Deployment successful!"
          docker image prune -f
        else
          echo "❌ Health check failed!"
          exit 1
        fi
      EOF
  environment:
    name: staging
    url: https://staging-bot.yourdomain.com
  only:
    - develop

# Deploy to production (manual approval required)
deploy:production:
  stage: deploy
  image: alpine:latest
  needs:
    - build
  before_script:
    - apk add --no-cache openssh-client
    - mkdir -p ~/.ssh
    - echo "$SSH_PRIVATE_KEY" | tr -d '\r' > ~/.ssh/id_rsa
    - chmod 600 ~/.ssh/id_rsa
    - ssh-keyscan -H $VPS_HOST >> ~/.ssh/known_hosts
  script:
    - echo "Deploying version ${FULL_VERSION} to production..."
    - |
      ssh $VPS_USER@$VPS_HOST << EOF
        cd /path/to/discord-bot

        # Backup current version for rollback
        docker inspect discord-bot --format='{{.Image}}' > .last_version || true
        echo "${FULL_VERSION}" > .deployed_version

        # Create deployment record
        echo "$(date -Iseconds) | ${FULL_VERSION} | ${CI_COMMIT_SHORT_SHA} | ${CI_COMMIT_MESSAGE}" >> deployments.log

        # Update docker-compose with specific version tag
        sed -i 's|image: ${DOCKER_IMAGE}:.*|image: ${DOCKER_IMAGE}:${FULL_VERSION}|' docker-compose.yml

        # Pull and deploy
        docker-compose pull
        docker-compose up -d

        # Wait for health check
        sleep 10
        if docker-compose ps | grep -q "Up (healthy)"; then
          echo "✅ Deployment successful!"
          echo "Deployed: ${FULL_VERSION}"
          docker image prune -f
        else
          echo "❌ Health check failed! Rolling back..."
          LAST_VERSION=\$(cat .last_version)
          sed -i "s|image: ${DOCKER_IMAGE}:.*|image: \${LAST_VERSION}|" docker-compose.yml
          docker-compose up -d
          exit 1
        fi
      EOF
  environment:
    name: production
    url: https://bot.yourdomain.com
  when: manual  # Require manual approval
  only:
    - main
    - tags

# Rollback job (manual trigger)
rollback:production:
  stage: deploy
  image: alpine:latest
  before_script:
    - apk add --no-cache openssh-client
    - mkdir -p ~/.ssh
    - echo "$SSH_PRIVATE_KEY" | tr -d '\r' > ~/.ssh/id_rsa
    - chmod 600 ~/.ssh/id_rsa
    - ssh-keyscan -H $VPS_HOST >> ~/.ssh/known_hosts
  script:
    - |
      ssh $VPS_USER@$VPS_HOST << 'EOF'
        cd /path/to/discord-bot

        # Show recent deployments
        echo "Recent deployments:"
        tail -n 10 deployments.log

        # Get last successful version
        LAST_VERSION=$(cat .last_version)
        echo ""
        echo "Rolling back to: ${LAST_VERSION}"

        # Rollback
        sed -i "s|image: ${DOCKER_IMAGE}:.*|image: ${LAST_VERSION}|" docker-compose.yml
        docker-compose up -d

        # Record rollback
        echo "$(date -Iseconds) | ROLLBACK | ${LAST_VERSION}" >> deployments.log

        echo "✅ Rollback complete!"
      EOF
  environment:
    name: production
    action: rollback
  when: manual
  only:
    - main