name: Delete CodeRabbit PR Comments

on:
  issue_comment:
    types: [created]
  pull_request_review:
    types: [submitted]

jobs:
  delete-coderabbit-comments:
    if: >
      (github.event_name == 'issue_comment' &&
       github.event.issue.pull_request &&
       (github.event.comment.user.login == 'coderabbitai' || github.event.comment.user.login == 'coderabbitai[bot]'))
      ||
      (github.event_name == 'pull_request_review' &&
       (github.event.review.user.login == 'coderabbitai' || github.event.review.user.login == 'coderabbitai[bot]'))
    runs-on: ubuntu-latest
    steps:
      # Fork PRs trigger `pull_request_review` without exposing repo secrets,
      # so the App token can't be minted. Skip the job cleanly in that case
      # instead of letting it fail loudly.
      - name: Check secrets availability
        id: check-secrets
        env:
          APP_ID: ${{ secrets.CODERABBIT_CLEANUP_APP_ID }}
        run: |
          if [ -z "$APP_ID" ]; then
            echo "App secrets not available (likely a fork PR event); skipping."
            echo "available=false" >> "$GITHUB_OUTPUT"
          else
            echo "available=true" >> "$GITHUB_OUTPUT"
          fi

      - name: Generate GitHub App token
        if: steps.check-secrets.outputs.available == 'true'
        id: app-token
        uses: actions/create-github-app-token@v3
        with:
          app-id: ${{ secrets.CODERABBIT_CLEANUP_APP_ID }}
          private-key: ${{ secrets.CODERABBIT_CLEANUP_APP_PRIVATE_KEY }}

      - name: Clean up CodeRabbit comments
        if: steps.check-secrets.outputs.available == 'true'
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
          REPO: ${{ github.repository }}
          PR_NUMBER: ${{ github.event.pull_request.number || github.event.issue.number }}
        run: |
          # Clear the body of all CodeRabbit reviews on this PR
          # (We can't delete reviews, but clearing the body removes the spam
          # while keeping inline code comments visible)
          REVIEW_IDS=$(gh api "repos/${REPO}/pulls/${PR_NUMBER}/reviews" \
            --jq '[.[] | select(.user.login == "coderabbitai[bot]" and .body != "") | .id] | .[]')

          for REVIEW_ID in $REVIEW_IDS; do
            gh api -X PUT "repos/${REPO}/pulls/${PR_NUMBER}/reviews/${REVIEW_ID}" \
              -f body="."
          done

          # Delete all CodeRabbit issue comments on this PR
          COMMENT_URLS=$(gh api "repos/${REPO}/issues/${PR_NUMBER}/comments?per_page=100" \
            --jq '[.[] | select(.user.login == "coderabbitai[bot]") | .url] | .[]')

          for URL in $COMMENT_URLS; do
            gh api -X DELETE "$URL"
          done