name: Update .app-headers in /misc

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

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

    steps:
      - name: Generate a token
        id: generate-token
        uses: actions/create-github-app-token@v1
        with:
          app-id: ${{ secrets.CREATE_HEADER_APP_ID }}  
          private-key: ${{ secrets.CREATE_HEADER_SECRET }}

      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set up Figlet
        run: sudo apt-get install -y figlet

      - name: Run generate-app-headers script
        run: |
          bash .github/workflows/generate-app-headers.sh

      - name: Create or update branch
        run: |
          # Check if the branch exists
          git fetch origin
          git checkout -b update-app-headers || git checkout update-app-headers
          
          # Configure Git user info
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"
          
          # Make your changes, e.g., update app-headers file
          echo "update app-headers to latest" >> misc/.app-headers
          
          git add misc/.app-headers
          git commit -m "update app-headers to latest"
          
          # Push changes to the branch
          git push origin update-app-headers --force

      - name: Create pull request
        id: create-pr
        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
            gh pr create --title "Update app-headers to latest" \
                         --body "This PR automatically updates the app-headers file." \
                         --head update-app-headers \
                         --base main \
                         --label "automated"
          fi

      - name: Approve pull request
        if: steps.create-pr.outputs.pr_exists == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          PR_NUMBER=$(gh pr list --head "update-app-headers" --json number --jq '.[].number')
          if [ -n "$PR_NUMBER" ]; then
            gh pr review $PR_NUMBER --approve --body "Approved automatically by GitHub Action."
          fi

      - name: Merge pull request
        if: steps.create-pr.outputs.pr_exists == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          PR_NUMBER=$(gh pr list --head "update-app-headers" --json number --jq '.[].number')
          if [ -n "$PR_NUMBER" ]; then
            gh pr merge $PR_NUMBER --merge --auto --delete-branch
          fi