name: Mention upstream repo for new pull requests

on:
  workflow_call:
    inputs:
      upstream:
        description: 'URL to the upstream repository'
        required: true
        type: string
      auto_close:
        description: 'Whether to close the PR after commenting'
        required: false
        default: false
        type: boolean

jobs:
  comment:
    runs-on: ubuntu-latest

    steps:
      - name: Comment on PR
        uses: actions/github-script@v7
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          upstream: ${{ inputs.upstream }}
          auto_close: ${{ inputs.auto_close }}
          script: |
            const upstream = core.getInput('upstream');
            const commentBody = `Thanks for the PR!

            PRs to this repo should be closed and reopened on the [upstream repo](${upstream}) instead of the GTNH fork. This can be ignored if there is a good reason to PR to specifically the fork instead.`;

            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.payload.pull_request.number,
              body: commentBody
            });

            const auto_close = core.getBooleanInput('auto_close');
            if (auto_close) {
              github.rest.issues.update({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                state: 'closed'
              });
            }