kind: pipeline
type: docker
name: update-helm-charts

steps:
  # Step 1: Lint all Helm charts
  - name: lint-charts
    image: alpine/helm:latest
    commands:
      - find charts -maxdepth 1 -type d -not -path charts -exec helm lint {} \;

  # Step 2: Package only changed Helm charts
  - name: package-changed-charts
    image: alpine/helm:latest
    commands:
      - mkdir -p charts/dist
      # Detect changed chart directories and package them
      - CHANGED_CHARTS=$(git diff --name-only $DRONE_PREV_COMMIT $DRONE_COMMIT | grep '^charts/' | sed 's|/[^/]*$||' | sort -u)
      - if [ -n "$CHANGED_CHARTS" ]; then echo "$CHANGED_CHARTS" | xargs -I {} helm package {} --destination charts/dist; else echo "No charts changed"; fi
    depends_on:
      - lint-charts

  # Step 3: Fetch the existing index.yaml from Gitea (if it exists)
  - name: fetch-existing-index
    image: curlimages/curl
    commands:
      - apk add jq
      - LATEST_TAG=$(curl -s -H "Authorization: token $GITEA_API_KEY" https://git.interlegis.leg.br/api/v1/repos/seit/rancher-charts/releases?limit=1 | jq -r '.[0].tag_name')
      - if [ -n "$LATEST_TAG" ]; then curl -L -o charts/dist/index.yaml https://git.interlegis.leg.br/seit/rancher-charts/releases/download/$LATEST_TAG/index.yaml || true; fi
    environment:
      GITEA_API_KEY:
        from_secret: gitea_api_key
    depends_on:
      - package-changed-charts

  # Step 4: Update index.yaml with changed charts (skip if no changes)
  - name: update-index
    image: alpine/helm:latest
    commands:
      - if [ -n "$(ls charts/dist/*.tgz 2>/dev/null)" ]; then helm repo index charts/dist --url https://git.interlegis.leg.br/seit/rancher-charts/raw/branch/gh-pages/ --merge charts/dist/index.yaml; else echo "No new charts to index"; fi
    depends_on:
      - fetch-existing-index

  # Step 5: Push charts and index to gh-pages branch without credentials file
  - name: push-to-branch
    image: alpine/git
    commands:
      # Set up the gh-pages branch
      - git fetch origin gh-pages || echo "gh-pages not found, will create it"
      - git checkout gh-pages || git checkout -b gh-pages
      # Copy new chart artifacts
      - mkdir -p charts/dist
      - cp -r $DRONE_WORKSPACE/charts/dist/* charts/dist/
      # Commit changes
      - git add charts/dist/*
      - git commit -m "Update Helm charts from commit ${DRONE_COMMIT}" || echo "No changes to commit"
      # Push with API key in URL and check for failure
      - git push https://x:${GITEA_API_KEY}@git.interlegis.leg.br/seit/rancher-charts.git HEAD:gh-pages --force || { echo "Git push failed"; exit 1; }
    environment:
      GITEA_API_KEY:
        from_secret: gitea_api_key
    when:
      condition: ls charts/dist/*.tgz 2>/dev/null  # Only run if there are new .tgz files
    depends_on:
      - update-index

  # Step 6: Create or update Gitea release with changed artifacts
  - name: release-to-gitea
    image: plugins/gitea-release
    settings:
      api_key:
        from_secret: gitea_api_key
      base_url: https://git.interlegis.leg.br
      files:
        - charts/dist/*.tar.gz
        - charts/dist/index.yaml
      title: "Helm Charts Update - ${DRONE_COMMIT}"
      note: "Updated Helm repository from commit ${DRONE_COMMIT}"
      draft: false
      prerelease: true
    when:
      condition: ls charts/dist/*.tgz 2>/dev/null  # Only run if there are new .tgz files
    depends_on:
      - push-to-branch

trigger:
  branch:
    - master
  event:
    - push