name: Pre-commit auto-update

on:
  schedule:
    - cron: '0 0 1 * *'  # Run monthly
  workflow_dispatch:  # Manual kickoff

permissions: {}

jobs:
  auto-update:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write
    steps:
      - uses: actions/checkout@v4

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

      - name: Update pre-commit hooks
        id: update
        run: |
          pip install pre-commit
          pre-commit autoupdate
          if [[ -n $(git status --porcelain) ]]; then
            echo "changes=true" >> $GITHUB_OUTPUT
          fi

      - name: Create Pull Request
        if: steps.update.outputs.changes == 'true'
        uses: peter-evans/create-pull-request@v6
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          branch: update/pre-commit-hooks
          delete-branch: true
          title: "chore: update pre-commit hooks"
          commit-message: "chore: update pre-commit hooks"
          body: |
            Automated PR to update pre-commit hooks to their latest versions.