name: Publish to npm

on:
  push:
    branches: [main]

jobs:
  publish:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Use Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'
          registry-url: 'https://registry.npmjs.org/'

      - name: Install dependencies
        run: npm install

      - name: Run test
        run: npm test

      - name: Check if version exists on npm
        id: check_version
        run: |
          set -e
          VERSION=$(node -p "require('./package.json').version")
          if npm show @n2flowjs/nbase@$VERSION > /dev/null 2>&1; then
            echo "Version $VERSION already exists. Skipping publish."
            echo "skip_publish=true" >> $GITHUB_ENV
          else
            echo "Version $VERSION does not exist. Proceeding with publish."
          fi
        shell: /usr/bin/bash -e {0}

      - name: Publish to npm
        if: env.skip_publish != 'true'
        run: npm publish --access public
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}