name: Release

on:
  workflow_dispatch:
    inputs:
      bump:
        description: Version bump type
        required: true
        default: patch
        type: choice
        options:
          - patch
          - minor
          - major

jobs:
  release:
    runs-on: ubuntu-slim
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Determine new version
        id: version
        run: |
          # Get the latest semver tag
          LATEST_TAG=$(git tag --list 'v[0-9]*.[0-9]*.[0-9]*' --sort=-v:refname | head -n1)
          if [ -z "$LATEST_TAG" ]; then
            echo "No existing version tag found"
            exit 1
          fi

          # Strip leading 'v' and split into components
          VERSION="${LATEST_TAG#v}"
          IFS='.' read -r MAJOR MINOR PATCH <<< "$VERSION"

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

          NEW_VERSION="v${MAJOR}.${MINOR}.${PATCH}"
          echo "previous=$LATEST_TAG" >> "$GITHUB_OUTPUT"
          echo "new=$NEW_VERSION" >> "$GITHUB_OUTPUT"
          echo "major=v${MAJOR}" >> "$GITHUB_OUTPUT"
          echo "Bumping $LATEST_TAG -> $NEW_VERSION"

      - name: Create GitHub release
        run: |
          gh release create "${{ steps.version.outputs.new }}" \
            --generate-notes \
            --notes-start-tag "${{ steps.version.outputs.previous }}"
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

      - name: Update major version tag
        run: |
          git fetch origin tag "${{ steps.version.outputs.new }}"
          git tag -f "${{ steps.version.outputs.major }}" "${{ steps.version.outputs.new }}"
          git push -f origin "${{ steps.version.outputs.major }}"