name: Update PR branch

on:
  pull_request_target:
    types: [labeled]

permissions:
  contents: write
  pull-requests: write

jobs:
  update-branch:
    if: github.event.label.name == 'qa:update-branch'
    runs-on: ubuntu-latest
    steps:
      - name: Update PR branch with base
        uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9
        with:
          script: |
            const { owner, repo } = context.repo;
            const pull_number = context.payload.pull_request.number;

            try {
              await github.rest.pulls.updateBranch({ owner, repo, pull_number });
              core.info(`Updated branch for PR #${pull_number}`);
            } catch (error) {
              if (error.status === 422) {
                core.info(`Branch already up to date or cannot be updated: ${error.message}`);
              } else {
                core.setFailed(`Failed to update branch: ${error.message}`);
              }
            } finally {
              try {
                await github.rest.issues.removeLabel({
                  owner,
                  repo,
                  issue_number: pull_number,
                  name: 'qa:update-branch',
                });
              } catch (error) {
                core.warning(`Could not remove label: ${error.message}`);
              }
            }