name: Publish to PyPI

on:
  push:
    tags:
      - 'v[0-9]+.[0-9]+.[0-9]+*'
  workflow_dispatch:

jobs:
  build_wheels:
    name: Build wheels on ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        include:
          - os: ubuntu-latest
            target: x86_64
            python: '3.12'
          - os: macos-latest
            target: x86_64
            python: '3.12'
          - os: windows-latest
            target: x86_64
            python: '3.12'
    
    steps:
      - uses: actions/checkout@v4
      
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python }}
          
      - name: Install Rust
        uses: dtolnay/rust-toolchain@stable
        with:
          toolchain: stable

      - name: Build wheels with Maturin
        uses: PyO3/maturin-action@v1
        with:
          target: ${{ matrix.target }}
          python: ${{ matrix.python }}
          command: build
          args: --release --out dist --find-interpreter

      - name: Upload built wheels as Artifact
        uses: actions/upload-artifact@v4
        with:
          name: wheels-${{ matrix.os }}-${{ matrix.target }}
          path: dist

  publish:
    name: Publish to PyPI
    needs: [build_wheels]
    runs-on: ubuntu-latest
    if: startsWith(github.ref, 'refs/tags/') || github.event_name == 'workflow_dispatch'

    steps:
    - name: Download ALL wheels
      uses: actions/download-artifact@v4
      with:
        path: dist

    - name: Debug - List ALL files
      run: |
        echo "=== FULL TREE ==="
        find dist -type f | head -20
        echo "=== WHEELS ONLY ==="
        find dist -name "*.whl" || echo "❌ NO .whl FILES FOUND"
        echo "=== dist/ CONTENTS ==="
        ls -la dist/

    - name: Flatten wheels to dist/
      run: |
        mkdir -p dist/wheels
        find dist -name "*.whl" -exec cp {} dist/ \;
        echo "FINAL dist/ wheels:"
        ls -la dist/*.whl || echo "❌ STILL NO WHEELS"

    - name: Publish to PyPI
      uses: PyO3/maturin-action@v1
      with:
        token: ${{ secrets.PYPI_API_TOKEN }}  # ← FIXED: token not pypi-token
        command: upload
        args: --skip-existing --non-interactive