name: Generate daily quizzes

# Run daily and allow manual runs
on:
  schedule:
    # Runs daily at 01:00 UTC (adjust cron if you want a different time)
    - cron: '0 1 * * *'
  workflow_dispatch: {}

permissions:
  contents: write  # required so the workflow can push changes back

jobs:
  generate:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          # allow push using the provided GITHUB_TOKEN
          persist-credentials: true
          fetch-depth: 0

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'

      - name: Install dependencies
        run: |
          npm ci

      - name: Run quiz generator
        # run the combined project generator script; adjust path if you use a different file name
        run: |
          node mathematicsnerd_combined_project.js generate --force=false

      - name: Show diff (debug)
        run: |
          git --no-pager status --porcelain
          git --no-pager diff --name-only || true

      - name: Commit and push generated quizzes if changed
        # Only commit if public/quizzes.json changed
        run: |
          # configure git user
          git config user.name "github-actions[bot]"
          git config user.email "actions@github.com"

          # Check if file changed
          if git status --porcelain | grep -q "public/quizzes.json"; then
            git add public/quizzes.json
            git commit -m "chore: daily quizzes: $(date -u +'%Y-%m-%d')"
            git push
            echo "Committed and pushed updated public/quizzes.json"
          else
            echo "No changes to public/quizzes.json — nothing to commit"
          fi