ci.yml

name: CI Workflow

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
    types: [opened, synchronize, reopened]

jobs:
  build-and-test:
    strategy:
      fail-fast: false # Prevents one OS from stopping others from building
      matrix:
        os: [macos-latest, ubuntu-latest, windows-2022]
    runs-on: ${{ matrix.os }}
    outputs:
      target_branch: ${{ steps.vars.outputs.target_branch }}

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

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.9'

      - name: Set up Swift (macOS)
        if: matrix.os == 'macos-latest'
        run: |
          sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
          swift --version

      - name: Set up Swift (Linux)
        if: matrix.os == 'ubuntu-latest'
        uses: swift-actions/setup-swift@v2 # Corrected repository name
        with:
          swift-version: "6.0"

      - name: Set up Swift (Windows)
        if: matrix.os == 'windows-2022'
        uses: SwiftyLab/setup-swift@latest
        with:
          swift-version: "6.0"

      - name: Install dependencies
        shell: bash
        run: |
          python -m pip install --upgrade pip
          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
          pip install pytest

      - name: Run build script (Unix)
        if: matrix.os != 'windows-2022'
        shell: bash
        run: |
          chmod +x build.sh
          ./build.sh

      # Windows build temporarily disabled due to Swift toolchain circular dependency issue
      # The Windows .dll exists in the repo but is not automatically updated like .dylib/.so files
      # TODO: Re-enable when Swift Windows CI circular dependency is resolved
      # - name: Run build script (Windows)
      #   if: matrix.os == 'windows-2022'
      #   shell: cmd
      #   run: |
      #     :: 1. Initialize MSVC with the stable Windows SDK positional arguments
      #     call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat" x64 10.0.22621.0 -vcvars_ver=14.29
      #     
      #     :: 2. Explicitly set SDKROOT to the Swift Windows Platform SDK
      #     :: This ensures Swift finds the Standard Library while using the MSVC headers above
      #     set SDKROOT=C:\Users\runneradmin\AppData\Local\Programs\Swift\Platforms\6.0.3\Windows.platform\Developer\SDKs\Windows.sdk
      #     
      #     :: 3. Clear SWIFTFLAGS to prevent interference with the build process
      #     set SWIFTFLAGS=
      #     
      #     :: 4. Run the build
      #     bash ./build.sh

      - name: Verify library was built
        shell: bash
        run: |
          echo "Checking if library was built successfully..."
          if [[ "${{ matrix.os }}" == "macos-latest" ]]; then
            EXPECTED_LIB="loop_to_python_api/dlibs/macos/libLoopAlgorithmToPython.dylib"
          elif [[ "${{ matrix.os }}" == "ubuntu-latest" ]]; then
            EXPECTED_LIB="loop_to_python_api/dlibs/linux/libLoopAlgorithmToPython.so"
          elif [[ "${{ matrix.os }}" == "windows-2022" ]]; then
            echo "Windows build disabled - using existing committed .dll for tests"
            echo "Windows .dll file exists but is not automatically updated in CI"
            ls -la "loop_to_python_api/dlibs/windows/libLoopAlgorithmToPython.dll" || echo "Note: Windows .dll should be committed to repo"
            exit 0
          fi
          
          echo "Expected library: $EXPECTED_LIB"
          if [ -f "$EXPECTED_LIB" ]; then
            echo "✓ Library found: $EXPECTED_LIB"
            ls -la "$EXPECTED_LIB"
          else
            echo "✗ Library NOT found: $EXPECTED_LIB"
            echo "Contents of dlibs directory:"
            find loop_to_python_api/dlibs/ -type f -name "*" 2>/dev/null || echo "No files found in dlibs/"
            echo "Contents of .build/release/:"
            find .build/release/ -name "*" -type f 2>/dev/null || echo "No files found in .build/release/"
            exit 1
          fi

      - name: Run tests
        shell: bash
        run: |
          # Help Linux find the shared library
          export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$(pwd)/loop_to_python_api/dlibs/linux/
          # Help macOS find the shared library
          export DYLD_LIBRARY_PATH=$DYLD_LIBRARY_PATH:$(pwd)/loop_to_python_api/dlibs/macos/
          # Help Windows find the shared library
          export PATH=$PATH:$(pwd)/loop_to_python_api/dlibs/windows/
          pytest -v -s

      - name: Upload Library Artifact
        uses: actions/upload-artifact@v4
        with:
          name: library-${{ matrix.os }}
          path: |
            loop_to_python_api/dlibs/macos/*.dylib
            loop_to_python_api/dlibs/linux/*.so
            loop_to_python_api/dlibs/windows/*.dll
          if-no-files-found: error

      - name: Set Target Branch
        id: vars
        shell: bash
        run: |
          if [ "${{ github.event_name }}" = "pull_request" ]; then
            echo "target_branch=${{ github.event.pull_request.head.ref }}" >> $GITHUB_OUTPUT
          else
            echo "target_branch=${{ github.ref_name }}" >> $GITHUB_OUTPUT
          fi

  commit-generated-files:
    needs: build-and-test
    runs-on: ubuntu-latest
    if: success() && (github.event_name == 'push' || github.event_name == 'pull_request')
    steps:
      - name: Checkout target branch
        uses: actions/checkout@v4
        with:
          ref: ${{ needs.build-and-test.outputs.target_branch }}
          fetch-depth: 0

      - name: Download all artifacts
        uses: actions/download-artifact@v4
        with:
          path: temp_libs

      - name: Organize and Commit
        run: |
          git config --local user.name "github-actions[bot]"
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          
          mkdir -p loop_to_python_api/dlibs/macos/
          mkdir -p loop_to_python_api/dlibs/linux/
          mkdir -p loop_to_python_api/dlibs/windows/
          
          # Move files and clean up temp folders
          find temp_libs/ -name "*.dylib" -exec mv {} loop_to_python_api/dlibs/macos/ \;
          find temp_libs/ -name "*.so" -exec mv {} loop_to_python_api/dlibs/linux/ \;
          find temp_libs/ -name "*.dll" -exec mv {} loop_to_python_api/dlibs/windows/ \;
          
          git add loop_to_python_api/dlibs/
          git commit -m "chore: update binaries for macOS, Linux, and Windows [skip ci]" || echo "No changes to commit"
          git push origin ${{ needs.build-and-test.outputs.target_branch }}