name: Documentation

on:
  release:
    types: [published]

permissions:
  contents: write

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Install uv
        uses: astral-sh/setup-uv@v7

      - name: Set up Python
        run: uv python install 3.13

      - run: uv sync --group dev

      - name: Configure git
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

      - name: Deploy documentation
        run: |
          VERSION=${GITHUB_REF_NAME#v}
          MAJOR=$(echo "$VERSION" | cut -d. -f1)
          DEPLOY_VERSION="v$(echo "$VERSION" | cut -d. -f1-2)"

          # On new major: keep only the latest feature version of the previous major
          PREV_MAJOR=$((MAJOR - 1))
          OLD_FEATURE_VERSIONS=$(uv run mike list 2>/dev/null | grep -oE "^v${PREV_MAJOR}\.[0-9]+" || true)

          if [ -n "$OLD_FEATURE_VERSIONS" ]; then
            LATEST_PREV=$(echo "$OLD_FEATURE_VERSIONS" | sort -t. -k2 -n | tail -1)
            echo "$OLD_FEATURE_VERSIONS" | while read -r OLD_V; do
              if [ "$OLD_V" != "$LATEST_PREV" ]; then
                echo "Deleting $OLD_V"
                uv run mike delete "$OLD_V"
              fi
            done
          fi

          uv run mike deploy --update-aliases "$DEPLOY_VERSION" stable
          uv run mike set-default stable
          git push origin gh-pages