name: Publish Python 🐍 distribution 📦 to PyPI

# This workflow creates immutable releases:
# 1. Build packages
# 2. Publish to PyPI (only on tag push)
# 3. After successful PyPI publish:
#    - Sign artifacts
#    - Check if GitHub release exists (idempotent)
#    - Create release with all artifacts atomically
# This ensures releases cannot be modified once published.

on:
  push:
    tags:
      - 'v*'
  workflow_dispatch:
    inputs:
      version:
        description: 'Version to release (e.g., 0.6.8)'
        required: true
        type: string

permissions:
  contents: read
  id-token: write

jobs:
  build:
    name: Build distribution 📦
    runs-on: ubuntu-latest
    permissions:
      contents: read
      id-token: write
    steps:
    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
      with:
        persist-credentials: false
    - name: Set up Python
      uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c  # v6.0.0
      with:
        python-version: "3.13"
    - name: Install pypa/build
      run: python3 -m pip install build --user
    - name: Build a binary wheel and a source tarball
      run: python3 -m build
    - name: Store the distribution packages
      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02  # v4.6.2
      with:
        name: python-package-distributions
        path: dist/

  publish-to-pypi:
    name: Publish Python 🐍 distribution 📦 to PyPI
    if: startsWith(github.ref, 'refs/tags/')
    needs:
    - build
    runs-on: ubuntu-latest
    environment:
      name: pypi
      url: https://pypi.org/p/rns-page-node
    permissions:
      id-token: write
      contents: read

    steps:
    - name: Download all the dists
      uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0  # v5.0.0
      with:
        name: python-package-distributions
        path: dist/
    - name: Publish distribution 📦 to PyPI
      uses: pypa/gh-action-pypi-publish@ed0c53931b1dc9bd32cbe73a98c7f6766f8a527e

  github-release:
    name: Sign the Python 🐍 distribution 📦 and create GitHub Release
    needs:
    - publish-to-pypi
    runs-on: ubuntu-latest
    permissions:
      contents: write
      id-token: write

    steps:
    - name: Download all the dists
      uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0  # v5.0.0
      with:
        name: python-package-distributions
        path: dist/
    - name: Sign the dists with Sigstore
      uses: sigstore/gh-action-sigstore-python@f7ad0af51a5648d09a20d00370f0a91c3bdf8f84  # v3.0.1
      with:
        inputs: >-
          ./dist/*.tar.gz
          ./dist/*.whl
    - name: Check if release exists
      id: check_release
      env:
        GITHUB_TOKEN: ${{ github.token }}
      run: |
        if gh release view "$GITHUB_REF_NAME" --repo "$GITHUB_REPOSITORY" >/dev/null 2>&1; then
          echo "exists=true" >> $GITHUB_OUTPUT
          echo "Release $GITHUB_REF_NAME already exists, skipping creation"
        else
          echo "exists=false" >> $GITHUB_OUTPUT
          echo "Release $GITHUB_REF_NAME does not exist, will create"
        fi
      continue-on-error: true
    - name: Create GitHub Release with artifacts
      if: steps.check_release.outputs.exists != 'true'
      env:
        GITHUB_TOKEN: ${{ github.token }}
      run: >-
        gh release create
        "$GITHUB_REF_NAME"
        --repo "$GITHUB_REPOSITORY"
        --title "Release $GITHUB_REF_NAME"
        --notes "PyPI: https://pypi.org/project/rns-page-node/$GITHUB_REF_NAME/"
        dist/*