name: Create Release Branch

on:
  workflow_dispatch:
    inputs:
      newVersion:
        description: A version number for this release (e.g., "0.1.0")
        required: true

jobs:  
  prepare-release:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: write

    steps:
      - name: Check out repo main branch
        uses: actions/checkout@v5
        with:
          ref: main

      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version-file: ".python-version"

      - name: Install uv
        uses: astral-sh/setup-uv@v6
        with:
          version: "0.9.3"

      - name: Create release branch
        run: |
          git checkout -b release/v${{ github.event.inputs.newVersion }}
          git push --set-upstream origin release/v${{ github.event.inputs.newVersion }}

      - name: Bump version
        run: uv version ${{ github.event.inputs.newVersion }}

      - name: Ensure package can be built
        run: uv build --all-packages

      - name: Update CHANGELOG
        uses: thomaseizinger/keep-a-changelog-new-release@v3
        with:
          version: ${{ github.event.inputs.newVersion }}

      - name: Commit Changes
        uses: stefanzweifel/git-auto-commit-action@v6
        with:
          commit_message: Bumps version to ${{ github.event.inputs.newVersion }}

      - name: Create pull request into main
        uses: thomaseizinger/create-pull-request@1.4.0
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          head: release/v${{ github.event.inputs.newVersion }}
          base: main
          title: v${{ github.event.inputs.newVersion }}
          body: >
            This PR was automatically generated. It bumps the version number
            in pyproject.toml and updates CHANGELOG.md. You may have to close
            this PR and reopen it to get the required checks to run.