name: 'Mend Slack Notifier'

on:
  discussion:
    types: [created, labeled]

permissions:
  discussions: read

jobs:
  slack:
    if: >
      (github.event.action == 'created' && contains(github.event.discussion.labels.*.name, 'mend-app')) ||
      (github.event.action == 'labeled' && github.event.label.name == 'mend-app')
    runs-on: ubuntu-slim
    steps:
      - name: Calculate time ago
        id: timeago
        env:
          CREATED_AT: ${{ github.event.discussion.created_at }}
        run: |
          created_at="$CREATED_AT"
          created_epoch=$(date -d "$created_at" "+%s")
          now_epoch=$(date +%s)
          diff=$((now_epoch - created_epoch))

          if [ $diff -lt 86400 ]; then
            hours=$((diff / 3600))
            echo "ago=$hours hours ago" >> "$GITHUB_OUTPUT"
          else
            days=$((diff / 86400))
            echo "ago=$days days ago" >> "$GITHUB_OUTPUT"
          fi

      - name: Post to Slack
        id: slack
        uses: slackapi/slack-github-action@dcb1066f776dd043e64d0e8ba94ca15cc7e1875d # v4.0.0
        with:
          method: chat.postMessage
          payload: |
            channel: 'C05NLTMGCJC'
            text: ${{ toJSON(format('<{0}|{1}> ({2}, {3})', github.event.discussion.html_url, github.event.discussion.title, github.event.discussion.created_at, steps.timeago.outputs.ago)) }}
          errors: true
          token: ${{ secrets.SLACK_BOT_TOKEN }}