name: Update .app-headers in /misc

on:
  push:
    branches: ["main"]
  workflow_dispatch:

jobs:
  update-and-create-pr:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write

    steps:
      # Step 1: Checkout repository
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0  # Ensure we have full access to all branches

      # Step 2: Check or Create update-app-headers branch
      - name: Check or Create update-app-headers branch
        run: |
          git fetch origin
          if ! git show-ref --quiet refs/heads/update-app-headers; then
            echo "Creating 'update-app-headers' branch."
            git checkout -b update-app-headers origin/main
          else
            echo "Switching to 'update-app-headers' branch."
            git checkout update-app-headers
          fi

      # Step 3: Ensure .app-headers file exists
      - name: Ensure .app-headers file exists
        run: |
          if [ ! -f ".app-headers" ]; then
            echo "The .app-headers file does not exist. Creating it."
            echo "Generated by CI" > .app-headers
          else
            echo ".app-headers already exists."
          fi

      # Step 4: Compare with main and commit changes
      - name: Compare with main and commit changes
        run: |
          git fetch origin
          DIFF=$(git diff --quiet origin/main..origin/update-app-headers -- .app-headers || echo "Changes detected")
          if [[ "$DIFF" == "Changes detected" ]]; then
            echo "Changes detected in .app-headers. Committing changes."
            git commit -am "[core]: update .app-headers to latest version"
            git push origin update-app-headers --force
          else
            echo "No changes in .app-headers. Skipping commit."
          fi

      # Step 5: Create Pull Request if changes detected
      - name: Create Pull Request if changes detected
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          PR_EXISTS=$(gh pr list --head "update-app-headers" --json number --jq '.[].number')
          if [ -z "$PR_EXISTS" ]; then
            echo "Creating a new PR."
            gh pr create --title "[core]: update .app-headers to latest version" \
                         --body "This PR automatically updates the .app-headers file." \
                         --head update-app-headers \
                         --base main
          else
            echo "PR already exists."
          fi

      # Step 6: Final status output
      - name: Output final status
        run: |
          echo "Workflow completed successfully. Branch and PR status updated."