name: arb-alerts

# Runs the monthly-arb scanner every ~5 min on GitHub's runners and texts
# you (via your Apps Script SMS webhook) when a NEW arb opportunity appears.
# State (which arbs were already-alerted) lives in alerts_state.json and is
# committed back by the workflow itself so cron runs remember each other.

on:
  schedule:
    - cron: "*/5 * * * *"        # 5-min cadence (GH min; expect ~5-15m lag)
  workflow_dispatch: {}          # manual "Run workflow" button in the UI

permissions:
  contents: write                # needed to commit alerts_state.json back

concurrency:
  group: arb-alerts
  cancel-in-progress: false      # let an in-flight run finish before the next

jobs:
  scan:
    runs-on: ubuntu-latest
    timeout-minutes: 5
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Run alert poller
        env:
          SMS_WEBHOOK: ${{ secrets.SMS_WEBHOOK }}
          SMS_PHONE:   ${{ secrets.SMS_PHONE }}
          SMS_CARRIER: ${{ secrets.SMS_CARRIER }}
        run: python3 scripts/gha_alerts.py

      - name: Commit state + dashboard snapshots if changed
        run: |
          git add alerts_state.json docs/data/ 2>/dev/null || true
          if git diff --cached --quiet; then
            echo "no changes to commit"
            exit 0
          fi
          git config user.email "actions@users.noreply.github.com"
          git config user.name  "arb-alerts"
          git commit -m "alerts+dashboard: refresh [skip ci]"
          git push