name: Auto Delete Merged Branch

on:
  pull_request:
    types: [closed]

jobs:
  delete-branch:
    if: github.event.pull_request.merged == true
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Delete merged branch
        uses: actions/github-script@v7
        with:
          script: |
            const branchName = context.payload.pull_request.head.ref;
            const owner = context.repo.owner;
            const repo = context.repo.repo;

            // Don't delete main/master/develop branches
            const protectedBranches = ['main', 'master', 'develop'];
            if (protectedBranches.includes(branchName)) {
              console.log(`Skipping deletion of protected branch: ${branchName}`);
              return;
            }

            try {
              await github.rest.git.deleteRef({
                owner,
                repo,
                ref: `heads/${branchName}`
              });
              console.log(`Successfully deleted branch: ${branchName}`);
            } catch (error) {
              console.log(`Could not delete branch ${branchName}: ${error.message}`);
            }