name: Auto-Approve Tests

on:
  pull_request:
    types: [opened, synchronize, labeled]

permissions:
  contents: read
  pull-requests: write

jobs:
  auto-approve:
    runs-on: ubuntu-latest
    if: |
      contains(github.event.pull_request.labels.*.name, 'tests-only') &&
      !contains(github.event.pull_request.labels.*.name, 'breaking-change') &&
      !contains(github.event.pull_request.labels.*.name, 'do-not-merge')

    steps:
      - name: Wait for tests to pass
        uses: lewagon/wait-on-check-action@v1.3.1
        with:
          ref: ${{ github.event.pull_request.head.sha }}
          running-workflow-name: 'auto-approve'
          repo-token: ${{ secrets.GITHUB_TOKEN }}
          wait-interval: 30

      - name: Approve PR
        uses: hmarr/auto-approve-action@v3
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Add auto-merge label
        run: gh pr edit ${{ github.event.pull_request.number }} --add-label "auto-merge"
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Comment on PR
        run: |
          gh pr comment ${{ github.event.pull_request.number }} --body "🤖 **Auto-Approved (Tests-Only)**

          This PR contains only test changes and all tests have passed.

          **Tier**: 2 (Tests-Only)
          **Policy**: AUTO_MERGE_POLICY.md#tier-2-tests
          **Soak Time**: 0 minutes

          Auto-merge will proceed immediately."
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}