name: "Maintenance: Label PR on approval"
on:
  workflow_run:
    workflows: ["Maintenance: Listen PR review"]
    types: [completed]

permissions:
  contents: read

jobs:
  label:
    if: ${{ github.event.workflow_run.conclusion == 'success' }}
    runs-on: ubuntu-latest
    permissions:
      actions: read
      contents: read
      issues: write
      pull-requests: write

    steps:
      - name: Download PR number artifact from upstream run
        uses: actions/download-artifact@v8
        with:
          name: pr-number-${{ github.event.workflow_run.id }}   # same unique name
          path: .
          run-id: ${{ github.event.workflow_run.id }}           # ← CRITICAL: fetch from the upstream run
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - id: pr
        run: echo "number=$(cat pr.txt)" >> $GITHUB_OUTPUT

      - name: Label when approved
        uses: j-fulbright/label-when-approved-action@v1.2
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          label: 'Ready to merge'
          require_committers_approval: 'true'
          remove_label_when_approval_missing: 'true'
          comment: '✅ This PR has been reviewed and approved — all set for merge!'
          pullRequestNumber: ${{ steps.pr.outputs.number }}

      - name: Remove review-related labels
        if: ${{ success() }}
        uses: actions/github-script@v8
        with:
          script: |
            const { owner, repo } = context.repo;
            const issue_number = ${{ steps.pr.outputs.number }};
            const labelsToRemove = ["Needs review", "Work in progress", "Backlog", "Can be closed?", "Help needed", "Needs Documentation"];

            for (const name of labelsToRemove) {
              try {
                await github.rest.issues.removeLabel({ owner, repo, issue_number, name });
                core.info(`Removed label "${name}"`);
              } catch (e) {
                core.warning(`Could not remove label "${name}": ${e.message}`);
              }
            }