name: Code Formatter (isort)
on:
  pull_request:
    paths:
      - '**.py'
  workflow_dispatch:
jobs:
  isort-check:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          ref: ${{ github.head_ref }}  # Checkout the PR branch
          fetch-depth: 0  # Fetch all history for all branches and tags
      - name: "Setup Python, Poetry and Dependencies"
        uses: packetcoders/action-setup-cache-python-poetry@main
        with:
          python-version: "3.12"
          poetry-version: "1.8.2"
          install-args: "-E dev"  # TODO: change this to --group dev when PR #842 lands
      - name: Run isort
        id: isort
        run: |
          output=$(poetry run isort --profile black --check-only --diff . | grep -v "Skipped" || true)
          echo "$output"
          if [ -n "$output" ]; then
            echo "isort_changed=true" >> $GITHUB_OUTPUT
          else
            echo "isort_changed=false" >> $GITHUB_OUTPUT
          fi
        continue-on-error: true
      - name: Auto-fix with isort and commit
        if: steps.isort.outputs.isort_changed == 'true' && !contains(github.event.pull_request.labels.*.name, 'check-only')
        run: |
          poetry run isort --profile black .
          git config --local user.email "action@github.com"
          git config --local user.name "GitHub Action"
          if [[ -n $(git status -s) ]]; then
            git add -A
            git commit -m "Apply isort import ordering"
            git push
          else
            echo "No changes to commit"
          fi
      - name: Error if 'check-only' label is present and changes are needed
        if: steps.isort.outputs.isort_changed == 'true' && contains(github.event.pull_request.labels.*.name, 'check-only')
        run: echo "Isort check failed. Please run 'isort .' locally to fix import orders." && exit 1