name: Clang Format & Tidy

on:
  pull_request:
  push:
    branches: [ main ]

jobs:
  clang-tools:
    runs-on: ubuntu-latest

    permissions:
      contents: write   # Needed to push changes back

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          ref: ${{ github.head_ref }}  # checkout the PR branch so we can push back

      - name: Install clang tools
        run: |
          sudo apt update
          sudo apt install -y clang-format clang-tidy

      - name: Run clang-format and auto-fix
        run: |
          FILES=$(find . -name '*.c' -o -name '*.cpp' -o -name '*.h' -o -name '*.hpp')
          clang-format -i $FILES

      - name: Commit and push changes (if any)
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add -u
          if ! git diff --cached --quiet; then
            git commit -m "Apply clang-format fixes"
            git push
          else
            echo "No formatting changes needed"
          fi