# Builds and publishes the package to PyPI from a release branch.
# Creates a merge-back PR to sync release changes to main.
name: "Release: Publish to PyPi"

on:
  workflow_dispatch:

permissions:
  contents: write
  pull-requests: write

jobs:
  publish:
    runs-on: ubuntu-latest
    steps:
      - name: Validate branch
        run: |
          if [[ ! "${{ github.ref_name }}" =~ ^release/v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
            echo "Error: Must run from a release/v* branch (e.g., release/v0.3.0)"
            exit 1
          fi

      - name: Extract version
        id: version
        run: |
          VERSION="${{ github.ref_name }}"
          VERSION="${VERSION#release/v}"
          echo "version=$VERSION" >> $GITHUB_OUTPUT
          echo "Publishing version: $VERSION"

      - uses: actions/checkout@v4

      - name: Install uv
        uses: astral-sh/setup-uv@v4
        with:
          version: "latest"

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.11"

      - name: Build package
        run: uv build

      - name: Publish to PyPI
        env:
          UV_PUBLISH_TOKEN: ${{ secrets.PYPI_TOKEN }}
        run: uv publish

      - name: Create merge-back PR
        env:
          GH_TOKEN: ${{ secrets.RELEASE_PAT }}
        run: |
          gh pr create \
            --base main \
            --head "${{ github.ref_name }}" \
            --title "chore: merge release v${{ steps.version.outputs.version }} to main" \
            --body "Syncs version bump and CHANGELOG from release v${{ steps.version.outputs.version }} to main."