name: 🏷️ PR Close on Label

on:
  pull_request_target:
    types: [labeled]

permissions:
  pull-requests: write
  issues: write

jobs:
  close:
    name: Close on triage label
    runs-on: ubuntu-latest
    timeout-minutes: 2
    steps:
      - name: Close PR if label matches
        uses: actions/github-script@v9
        with:
          script: |
            // Maintainer-applied labels that trigger an auto-close + comment.
            // Add entries here as new triage categories come up.
            const COMMENTS = {
              "appears-ai-generated": (author) => `Hi @${author}, thanks for the contribution.

            This PR was closed because it appears to be AI-generated. We require contributions to be hand-written and understood by their author — if a regression shows up later, we need someone who can debug their own code.

            If this was misclassified, please reach out on our [Discord](https://discord.gg/K9zernJB5z) or comment below.

            See [CONTRIBUTING.md](https://github.com/${context.repo.owner}/${context.repo.repo}/blob/main/CONTRIBUTING.md) for the full contribution process.`,
            };

            const labelName = context.payload.label?.name;
            if (!labelName || !(labelName in COMMENTS)) {
              core.info(`Label "${labelName}" is not a close-on-label trigger, skipping`);
              return;
            }

            const pr = context.payload.pull_request;
            if (pr.state !== "open") {
              core.info(`PR #${pr.number} is already ${pr.state}, skipping`);
              return;
            }

            const body = COMMENTS[labelName](pr.user.login);

            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: pr.number,
              body,
            });
            await github.rest.pulls.update({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: pr.number,
              state: "closed",
            });
            core.info(`Closed PR #${pr.number} after "${labelName}" label was applied`);