name: Deploy Documentation and Helm Charts to GitHub Pages

on:
  push:
    branches: ["main"]
    paths:
      - 'docs/**'
      - 'mkdocs.yml'
      - 'charts/**'
      - '.github/workflows/pages-deploy.yml'
  workflow_dispatch:

permissions:
  contents: write
  pages: write
  id-token: write

concurrency:
  group: "pages"
  cancel-in-progress: false

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Setup Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.x'

      - name: Setup Helm
        uses: azure/setup-helm@v4
        with:
          version: '3.12.0'

      - name: Cache dependencies
        uses: actions/cache@v4
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip-mkdocs
          restore-keys: |
            ${{ runner.os }}-pip-

      - name: Install MkDocs and dependencies
        run: pip install -r docs/requirements.txt

      - name: Build documentation
        run: |
          mkdocs build

      - name: Package Helm charts
        run: |
          mkdir -p _helm-repo

          # Download existing index if it exists
          echo "Downloading existing index.yaml..."
          curl -s https://karpenter-ibm.sh/index.yaml > _helm-repo/old-index.yaml || echo "No existing index found"

          # Package the current chart
          if [ -f "charts/Chart.yaml" ]; then
            echo "Packaging chart: charts/"
            helm package charts/ --destination _helm-repo
          fi

          # Merge with existing index (preserves all versions)
          if [ -f "_helm-repo/old-index.yaml" ] && [ -s "_helm-repo/old-index.yaml" ]; then
            echo "Merging with existing index..."
            helm repo index _helm-repo --url https://karpenter-ibm.sh --merge _helm-repo/old-index.yaml
          else
            echo "Creating new index..."
            helm repo index _helm-repo --url https://karpenter-ibm.sh
          fi

      - name: Combine site content
        run: |
          # Put docs at root (since we build with root URL)
          cp -r site/* .

          # Keep charts at root (existing customer configs)
          cp -r _helm-repo/* .

          # Preserve custom domain configuration
          cp docs/CNAME .

          # Clean up build directories
          rm -rf site _helm-repo

      - name: Deploy to gh-pages branch
        uses: peaceiris/actions-gh-pages@v4
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: .
          publish_branch: gh-pages
          force_orphan: false
          user_name: 'github-actions[bot]'
          user_email: 'github-actions[bot]@users.noreply.github.com'