name: Version Bump

# Manual only. Semantic version tags are applied deliberately (patch/minor/major);
# there is no daily auto-bump and no Slack notification.
on:
  workflow_dispatch:
    inputs:
      bump:
        description: "Version bump type"
        type: choice
        options:
          - patch
          - minor
          - major
        default: patch

permissions:
  contents: write

jobs:
  tag:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0
          fetch-tags: true

      - name: Compute and push next version tag
        run: |
          LAST_TAG=$(git tag -l 'v*' --sort=-v:refname | head -1)
          LAST_TAG="${LAST_TAG:-v0.0.0}"
          MAJOR=$(echo "$LAST_TAG" | sed 's/^v//' | cut -d. -f1)
          MINOR=$(echo "$LAST_TAG" | sed 's/^v//' | cut -d. -f2)
          PATCH=$(echo "$LAST_TAG" | sed 's/^v//' | cut -d. -f3)

          case "${{ inputs.bump }}" in
            major) VERSION="v$((MAJOR + 1)).0.0" ;;
            minor) VERSION="v${MAJOR}.$((MINOR + 1)).0" ;;
            *)     VERSION="v${MAJOR}.${MINOR}.$((PATCH + 1))" ;;
          esac

          echo "Bumping $LAST_TAG -> $VERSION"
          git tag -a "$VERSION" -m "$VERSION"
          git push origin "$VERSION"