name: Check awaiting-mathlib label

on:
  merge_group:
  pull_request:
    types: [opened, synchronize, reopened, labeled, unlabeled]

jobs:
  check-awaiting-mathlib:
    runs-on: ubuntu-latest
    steps:
      - name: Check awaiting-mathlib label
        id: check-awaiting-mathlib-label
        if: github.event_name == 'pull_request'
        uses: actions/github-script@v7
        with:
          script: |
            const { labels, number: prNumber } = context.payload.pull_request;
            const hasAwaiting = labels.some(label => label.name == "awaiting-mathlib");
            const hasBreaks = labels.some(label => label.name == "breaks-mathlib");
            const hasBuilds = labels.some(label => label.name == "builds-mathlib");

            if (hasAwaiting && hasBreaks) {
              core.setFailed('PR has both "awaiting-mathlib" and "breaks-mathlib" labels.');
            } else if (hasAwaiting && !hasBreaks && !hasBuilds) {
              core.info('PR is marked "awaiting-mathlib" but neither "breaks-mathlib" nor "builds-mathlib" labels are present.');
              core.setOutput('awaiting', 'true');
            }
      
      - name: Wait for mathlib compatibility
        if: github.event_name == 'pull_request' && steps.check-awaiting-mathlib-label.outputs.awaiting == 'true'
        run: |
          echo "::notice title=Awaiting mathlib::PR is marked 'awaiting-mathlib' but neither 'breaks-mathlib' nor 'builds-mathlib' labels are present."
          echo "This check will remain in progress until the PR is updated with appropriate mathlib compatibility labels."
          # Keep the job running indefinitely to show "in progress" status
          while true; do
            sleep 3600  # Sleep for 1 hour at a time
          done