name: "Pre-commit Format & Lint"
on:
  pull_request:
    branches:
      - testbranch
jobs:
  pre-commit:
    runs-on: ubuntu-latest
    steps:
#      - name: Generate a token
#        id: generate-token
#        uses: actions/create-github-app-token@df432ceedc7162793a195dd1713ff69aefc7379e
#        with:
#          app-id: ${{ secrets.APP_ID }}
#          private-key: ${{ secrets.APP_PRIVATE_KEY }}
#          owner: ${{ github.repository_owner }}

      - name: Checkout code (initial)
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
        with:
          ref: refs/pull/${{ github.event.pull_request.number }}/merge
          sparse-checkout: .github
          sparse-checkout-cone-mode: true
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Python
        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065
        with:
          python-version: '3.12'

      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install pydantic requests pre-commit
          sudo apt-get update
          sudo apt-get install -y clang-format

      - name: Configure Git
        run: |
          git config user.name "systems-assistant[bot]"
          git config user.email "systems-assistant[bot]@users.noreply.github.com"

      - name: Detect changed subtrees
        id: detect
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          python .github/scripts/pr_detect_changed_subtrees.py \
            --repo "${{ github.repository }}" \
            --pr "${{ github.event.pull_request.number }}" \
            --config ".github/repos-config.json"

      - name: Checkout full repo with changed subtrees
        if: steps.detect.outputs.subtrees
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
        with:
          ref: refs/pull/${{ github.event.pull_request.number }}/merge
          sparse-checkout: |
            .github
            ${{ steps.detect.outputs.subtrees }}
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}
          submodules: false

      - name: Get list of changed files
        id: changed-files
        shell: bash
        run: |
          git fetch origin ${{ github.event.pull_request.base.ref }} --depth=1
          changed=$(git diff --name-only FETCH_HEAD HEAD)
          files=$(echo "$changed" | tr '\n' ' ' | sed 's/ *$//')
          echo "all_modified_files=$files" >> $GITHUB_OUTPUT

      - name: Show changed-files output
        run: |
          echo "Changed files are: ${{ steps.changed-files.outputs.all_modified_files }}"

      - name: Disable submodule recursion
        run: git config submodule.recurse false

      - name: Run and auto-commit pre-commit fixes
        env:
          GIT_AUTHOR_NAME: "systems-assistant[bot]"
          GIT_AUTHOR_EMAIL: "systems-assistant[bot]@users.noreply.github.com"
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          var="${{ steps.changed-files.outputs.all_modified_files }}"
          read -r -a files <<<"$var"
          if [ ${#files[@]} -eq 0 ]; then
            echo "No files changed, skipping pre-commit."
            exit 0
          fi
          echo "Running pre-commit on these files:"
          printf "  %s\n" "${files[@]}"
          set +e
          pre-commit run --files "${files[@]}" --show-diff-on-failure
          set -e
          git add "${files[@]}"
          git fetch origin "${{github.head_ref}}"
          if ! git diff --cached --quiet; then
            git commit -m "ci: apply pre-commit fixes"
            git push --force-with-lease origin HEAD:${{ github.head_ref }}
          fi