# Notify Slack when a PR is ready for review (not draft, title does not contain WIP/wip/Wip.).
# Triggers: new PR (non-draft, no WIP), draft -> ready, or title edited to remove WIP.
name: PR notify Slack

on:
  pull_request_target:
    types: [opened, reopened, ready_for_review, edited]
  workflow_dispatch:

jobs:
  test-webhook:
    runs-on: ubuntu-latest
    if: github.event_name == 'workflow_dispatch'
    steps:
      - name: Test Slack webhook
        env:
          SLACK_PULL_REQUEST_WEBHOOK_URL: ${{ secrets.SLACK_PULL_REQUEST_WEBHOOK_URL }}
        run: |
          if [ -z "$SLACK_PULL_REQUEST_WEBHOOK_URL" ]; then
            echo "SLACK_PULL_REQUEST_WEBHOOK_URL secret is not set. Add it in repo Settings → Secrets → Actions."
            exit 1
          fi
          BODY=$(jq -n --arg text "Test: PR notify Slack webhook is working (from ${{ github.repository }})" '{text: $text}')
          curl -sS -X POST -H 'Content-Type: application/json' --data "$BODY" "$SLACK_PULL_REQUEST_WEBHOOK_URL"
          echo ""
          echo "If you see this and no curl error, check your Slack channel for the test message."

  notify:
    runs-on: ubuntu-latest
    if: |
      github.event.pull_request.draft == false &&
      !startsWith(github.event.pull_request.title, 'wip') &&
      !startsWith(github.event.pull_request.title, '[wip]') &&
      (
        github.event.action != 'edited' ||
        (
          github.event.changes.title &&
          (
            startsWith(github.event.changes.title.from, 'wip') ||
            startsWith(github.event.changes.title.from, '[wip]')
          )
        )
      )
    steps:
      - name: Send Slack notification
        env:
          SLACK_PULL_REQUEST_WEBHOOK_URL: ${{ secrets.SLACK_PULL_REQUEST_WEBHOOK_URL }}
        run: |
          if [ -z "$SLACK_PULL_REQUEST_WEBHOOK_URL" ]; then
            echo "SLACK_PULL_REQUEST_WEBHOOK_URL secret is not set; skipping notification."
            exit 0
          fi
          PR_URL="${{ github.event.pull_request.html_url }}"
          PR_TITLE="${{ github.event.pull_request.title }}"
          PR_AUTHOR="${{ github.event.pull_request.user.login }}"
          # Slack mrkdwn: <url|text> for link
          BODY=$(jq -n \
            --arg url "$PR_URL" \
            --arg title "$PR_TITLE" \
            --arg author "$PR_AUTHOR" \
            '{text: ("PR ready for review: <" + $url + "|" + $title + "> by " + $author)}')
          curl -sS -X POST -H 'Content-Type: application/json' --data "$BODY" "$SLACK_PULL_REQUEST_WEBHOOK_URL"
        if: env.SLACK_PULL_REQUEST_WEBHOOK_URL != ''