name: estimates

# Runs the parameter grid in scripts/grid.py and caches the results on the
# `estimates` branch. Each dispatch adds fresh, independent pasts to every cell
# and rebuilds the pooled means, so repeated runs tighten the error bars.

on:
  workflow_dispatch:

permissions:
  contents: write

# One sweep at a time — two concurrent dispatches would race on the push.
concurrency:
  group: estimates
  cancel-in-progress: false

jobs:
  sweep:
    runs-on: ubuntu-latest
    timeout-minutes: 60
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-python@v5
        with:
          python-version: '3.12'

      - run: pip install -e .

      - name: Check out the estimates branch (creating it if absent)
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          set -euo pipefail
          mkdir -p data
          cd data
          git init -q
          git remote add origin \
            "https://x-access-token:${GH_TOKEN}@github.com/${GITHUB_REPOSITORY}.git"
          if git fetch -q --depth 1 origin estimates; then
            git checkout -q -B estimates FETCH_HEAD
            echo "continuing $(wc -l < runs.jsonl) cached records"
          else
            git checkout -q -b estimates
            echo "estimates branch does not exist yet — starting it"
          fi

      - name: Run the sweep
        run: python scripts/run_sweep.py --data-dir data

      - name: Commit and push
        run: |
          set -euo pipefail
          cd data
          git add -A
          if git diff --cached --quiet; then
            echo "nothing to commit"
            exit 0
          fi
          git \
            -c user.name='github-actions[bot]' \
            -c user.email='41898282+github-actions[bot]@users.noreply.github.com' \
            commit -q -m "estimates: run ${GITHUB_RUN_NUMBER} from ${GITHUB_SHA:0:7}"
          git push -q origin estimates