name: Auto Update .app-headers and Create PR

on:
  push:
    branches:
      - main
    paths:
      - 'ct/**.sh'

jobs:
  update-app-headers:
    runs-on: ubuntu-latest
    steps:
      # Step 1: Checkout the repository
      - name: Checkout repository
        uses: actions/checkout@v2

      # Step 2: Set up Git user for committing changes
      - name: Set up Git
        run: |
          git config --global user.name "GitHub Actions"
          git config --global user.email "actions@github.com"

      # Step 3: Ensure .app-headers file exists
      - name: Ensure .app-headers file exists
        run: |
          if [ ! -f ct/.app-headers ]; then
            echo "Creating .app-headers file."
            touch ct/.app-headers
          fi

      # Step 4: Process the ct/*.sh files and update .app-headers
      - name: Update .app-headers with figlet output
        run: |
          echo "Updating .app-headers with figlet output."
          for script in ct/*.sh; do
            if grep -q 'APP=' "$script"; then
              APP_NAME=$(grep -oP 'APP=\K\w+' "$script")
              echo "Processing $script for APP: \"$APP_NAME\""
              figlet "$APP_NAME" >> ct/.app-headers
            fi
          done

      # Step 5: Check out and merge main into the update-app-headers branch without committing
      - name: Merge main into update-app-headers
        run: |
          git fetch origin
          git checkout update-app-headers
          git merge origin/main --no-ff --no-commit -m "Merge main into update-app-headers"
          echo "Merge complete. Please review and commit the changes manually."

      # Step 6: Check if a PR exists and create one if it doesn't
      - name: Create Pull Request if not exists
        run: |
          PR_EXISTS=$(gh pr list --head "update-app-headers" --json number --jq '.[].number')

          if [ -z "$PR_EXISTS" ]; then
            echo "Creating a new PR."
            PR_URL=$(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)
            echo "PR created: $PR_URL"
          else
            echo "PR already exists."
          fi