name: CI (tests + ruff) and stable tag

on:
  push:
    branches: ["main"]
  pull_request:

permissions:
  contents: write

jobs:
  test:
    name: unittest (py${{ matrix.python-version }})
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        python-version: ["3.10", "3.11", "3.12", "3.13"]
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}
          cache: pip

      - name: Install (editable)
        run: |
          python -m pip install --upgrade pip
          pip install -e .

      - name: Run tests
        run: |
          make test

  ruff:
    name: ruff (py3.12)
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: "3.12"
          cache: pip

      - name: Install (editable) + ruff
        run: |
          python -m pip install --upgrade pip
          pip install -e .
          pip install ruff

      - name: Ruff check
        run: |
          ruff check .

      # Optional: falls du ruff format nutzt
      # - name: Ruff format (check)
      #   run: |
      #     ruff format --check .

  stable:
    name: Tag stable (if version commit)
    runs-on: ubuntu-latest
    needs: [test, ruff]
    if: >
      github.event_name == 'push' &&
      github.ref == 'refs/heads/main' &&
      github.repository_owner == 'kevinveenbirkenbach'
    steps:
      - name: Checkout (full history for tags)
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check commit message for version
        id: version
        shell: bash
        run: |
          set -euo pipefail
          msg="$(git log -1 --pretty=%B)"
          echo "Commit message:"
          echo "$msg"
          if echo "$msg" | grep -Eq '(^|[^0-9])(v?[0-9]+\.[0-9]+\.[0-9]+)([^0-9]|$)'; then
            echo "has_version=true" >> "$GITHUB_OUTPUT"
          else
            echo "has_version=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Update stable tag
        if: steps.version.outputs.has_version == 'true'
        shell: bash
        run: |
          set -euo pipefail
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

          # Force-update lightweight tag "stable" to current commit
          git tag -f stable

          # Push (force) the tag
          git push -f origin stable