# Copyright 2025 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

name: Check Pyink Formatting

on:
  pull_request:
    paths:
      - 'src/**/*.py'
      - 'tests/**/*.py'
      - 'pyproject.toml'

jobs:
  pyink-check:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.x'

      - name: Install pyink
        run: |
          pip install pyink

      - name: Detect changed Python files
        id: detect_changes
        run: |
          git fetch origin ${{ github.base_ref }}
          CHANGED_FILES=$(git diff --diff-filter=ACMR --name-only origin/${{ github.base_ref }}...HEAD | grep -E '\.py$' || true)
          echo "CHANGED_FILES=${CHANGED_FILES}" >> $GITHUB_ENV

      - name: Run pyink on changed files
        if: env.CHANGED_FILES != ''
        run: |
          echo "Changed Python files:"
          echo "$CHANGED_FILES"

          # Run pyink --check
          set +e
          pyink --check --config pyproject.toml $CHANGED_FILES
          RESULT=$?
          set -e

          if [ $RESULT -ne 0 ]; then
            echo ""
            echo "❌ Pyink formatting check failed!"
            echo "👉 To fix formatting, run locally:"
            echo ""
            echo "    pyink --config pyproject.toml $CHANGED_FILES"
            echo ""
            exit $RESULT
          fi

      - name: No changed Python files detected
        if: env.CHANGED_FILES == ''
        run: |
          echo "No Python files changed. Skipping pyink check."