name: Node.js Test
on: [push]

jobs:
  nodejs-test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'     # or '18' if you need older
          cache: 'npm'

      - name: Verify Node & npm
        run: |
          node -v
          npm -v

      - name: Detect & install deps (lockfile-aware) + run tests
        shell: bash
        run: |
          set -euo pipefail

          if [ -f package.json ]; then
            echo "package.json found."

            if [ -f package-lock.json ]; then
              echo "Using npm ci (lockfile present)."
              npm ci
            else
              echo "No lockfile; using npm install."
              npm install
            fi

            # Run tests only if there's a real test script (not the default placeholder)
            if node -e "const p=require('./package.json'); const s=p.scripts&&p.scripts.test; process.exit(!(s && !/no test specified/.test(String(s))))"; then
              npm test
            else
              echo "No meaningful test script found; skipping tests."
            fi

          else
            echo "No Node project detected. Creating a tiny smoke-test project..."
            npm init -y >/dev/null 2>&1
            npm install --save-dev mocha >/dev/null 2>&1
            npm pkg set scripts.test="mocha" >/dev/null 2>&1

            # Write minimal app and test (note: heredoc terminators aligned under run: |)
            cat > sum.js <<'EOF'
            function add(a, b) { return a + b; }
            module.exports = { add };
            EOF

                        mkdir -p test
                        cat > test/sum.test.js <<'EOF'
            const assert = require('assert');
            const { add } = require('../sum');
            describe('add', () => {
              it('adds numbers', () => {
                assert.strictEqual(add(2, 2), 4);
              });
            });
            EOF

            npm test
          fi