name: pre-commit

on:
  pull_request:
    types:
      - opened
      - synchronize

env:
  # Forks and Dependabot don't have access to secrets
  HAS_SECRETS: ${{ secrets.PRE_COMMIT != '' }}

jobs:
  pre-commit:
    runs-on: ubuntu-latest
    steps:
      - name: Dump GitHub context
        env:
          GITHUB_CONTEXT: ${{ toJson(github) }}
        run: echo "$GITHUB_CONTEXT"
      - uses: actions/checkout@v5
        name: Checkout PR for own repo
        if: env.HAS_SECRETS == 'true'
        with:
          # To be able to commit it needs to fetch the head of the branch, not the
          # merge commit
          ref: ${{ github.head_ref }}
          # And it needs the full history to be able to compute diffs
          fetch-depth: 0
          # A token other than the default GITHUB_TOKEN is needed to be able to trigger CI
          token: ${{ secrets.PRE_COMMIT }}
      # pre-commit lite ci needs the default checkout configs to work
      - uses: actions/checkout@v5
        name: Checkout PR for fork
        if: env.HAS_SECRETS == 'false'
        with:
        # To be able to commit it needs the head branch of the PR, the remote one
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: 0
      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version-file: ".python-version"
      - name: Setup uv
        uses: astral-sh/setup-uv@v7
        with:
          cache-dependency-glob: |
            pyproject.toml
            uv.lock
      - name: Install Dependencies
        run: uv sync --locked --extra all
      - name: Run prek - pre-commit
        id: precommit
        run: uvx prek run --from-ref origin/${GITHUB_BASE_REF} --to-ref HEAD --show-diff-on-failure
        continue-on-error: true
      - name: Commit and push changes
        if: env.HAS_SECRETS == 'true'
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add -A
          if git diff --staged --quiet; then
            echo "No changes to commit"
          else
            git commit -m "🎨 Auto format"
            git push
          fi
      - uses: pre-commit-ci/lite-action@v1.1.0
        if: env.HAS_SECRETS == 'false'
        with:
          msg: 🎨 Auto format
      - name: Error out on pre-commit errors
        if: steps.precommit.outcome == 'failure'
        run: exit 1

  # https://github.com/marketplace/actions/alls-green#why
  pre-commit-alls-green:  # This job does nothing and is only used for the branch protection
    if: always()
    needs:
      - pre-commit
    runs-on: ubuntu-latest
    steps:
      - name: Dump GitHub context
        env:
          GITHUB_CONTEXT: ${{ toJson(github) }}
        run: echo "$GITHUB_CONTEXT"
      - name: Decide whether the needed jobs succeeded or failed
        uses: re-actors/alls-green@release/v1
        with:
          jobs: ${{ toJSON(needs) }}
