name: Label Pull Request
on:
  pull_request_target:
    types: ['opened', 'reopened', 'synchronize', 'ready_for_review', 'converted_to_draft', 'closed']
    branches: ['main']
permissions:
  contents: read
  pull-requests: write

jobs:
  labeler:
    name: 'Apply content-based labels'
    if: github.event.action == 'opened' || github.event.action == 'reopened' || github.event.action == 'synchronize'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/labeler@v5
        with:
          sync-labels: false
  peer_review:
    name: 'Apply peer review label'
    needs: labeler
    if: >-
      (github.event.action == 'opened' || github.event.action == 'reopened' || 
      github.event.action == 'ready_for_review') && !github.event.pull_request.draft
    runs-on: ubuntu-latest
    steps:
      - name: 'Add label'
        run: "gh pr edit \"$PR_URL\" --add-label 'waiting-on: peer-review'"
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  unblock_draft_prs:
    name: 'Remove waiting-on labels'
    needs: labeler
    if: github.event.action == 'converted_to_draft' || github.event.action == 'closed'
    runs-on: ubuntu-latest
    steps:
      - name: 'Remove labels'
        run: |-
          gh pr edit "$PR_URL" --remove-label 'waiting-on: peer-review' \
            --remove-label 'waiting-on: core-review' \
            --remove-label 'waiting-on: world-maintainer' \
            --remove-label 'waiting-on: author'
        env:
          PR_URL: ${{ github.event.pull_request.html_url }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}