name: Nightly OHLCV Prefetch

on:
  schedule:
    # 1:00 AM UTC — runs before iterate (6:00), research (7:00), hypothesis (8:00), discovery (12:30)
    - cron: "0 1 * * *"
  workflow_dispatch:
    inputs:
      period:
        description: "History window for initial download (e.g. 1y, 6mo)"
        required: false
        default: "1y"

jobs:
  prefetch:
    runs-on: ubuntu-latest
    timeout-minutes: 30

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Set up git identity
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.10"
          cache: pip

      - name: Install dependencies
        run: pip install -r requirements.txt

      - name: Run OHLCV prefetch
        env:
          PERIOD: ${{ github.event.inputs.period || '1y' }}
        run: |
          python scripts/prefetch_ohlcv.py --period "$PERIOD"

      - name: Commit cache updates
        run: |
          git add data/ohlcv_cache/
          if git diff --cached --quiet; then
            echo "No cache changes to commit"
          else
            git commit -m "chore(cache): nightly OHLCV prefetch $(date -u +%Y-%m-%d)"
            git push origin main
          fi