name: Publish to npm

on:
  push:
    branches: [main]

jobs:
  publish:
    runs-on: ubuntu-latest
    permissions:
      contents: read
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: 20
          registry-url: https://registry.npmjs.org
      - run: npm ci
      - run: npm run build
      - run: npm test
      - name: Publish if version changed
        run: |
          CURRENT=$(npm view @companion-ai/feynman version 2>/dev/null || echo "0.0.0")
          LOCAL=$(node -p "require('./package.json').version")
          if [ "$CURRENT" != "$LOCAL" ]; then
            npm publish --access public
          else
            echo "Version $LOCAL already published, skipping"
          fi
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}