name: PR Rules Enforcement

on:
  pull_request:
    branches:
      - main
      - staging

jobs:
  check-pr:
    runs-on: ubuntu-latest
    steps:
      - name: Prevent dev merges
        run: |
          if [[ "${{ github.head_ref }}" == "dev" ]]; then
            echo "ERROR: Merging 'dev' into '${{ github.base_ref }}' is forbidden!"
            exit 1
          fi

      - name: Allow only staging into main
        if: github.base_ref == 'main'
        run: |
          if [[ "${{ github.head_ref }}" != "staging" ]]; then
            echo "ERROR: Only 'staging' branch is allowed to merge into 'main'. Current: '${{ github.head_ref }}'"
            exit 1
          fi