name: Version
on:
  workflow_dispatch: 
  push:
    branches: [main]
permissions:
  contents: write
  actions: write
jobs:
  version:
    name: Bump version and tag
    runs-on: ubuntu-latest
    if: "!startsWith(github.event.head_commit.message, 'chore(release):')"
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}
      - name: Get latest tag
        id: latest_tag
        run: |
          tag=$(git tag -l 'v*' --sort=-v:refname | head -n1)
          if [ -z "$tag" ]; then
            echo "tag=" >> "$GITHUB_OUTPUT"
            echo "No existing tags found"
          else
            echo "tag=$tag" >> "$GITHUB_OUTPUT"
            echo "Latest tag: $tag"
          fi
      - name: Determine version bump from commits
        id: bump
        run: |
          latest_tag="${{ steps.latest_tag.outputs.tag }}"

          # First release: publish 0.0.0 without bumping
          if [ -z "$latest_tag" ]; then
            echo "version=0.0.0" >> "$GITHUB_OUTPUT"
            echo "skip=false" >> "$GITHUB_OUTPUT"
            echo "First release: v0.0.0"
            exit 0
          fi

          current="${latest_tag#v}"
          IFS='.' read -r major minor patch <<< "$current"

          commits=$(git log "$latest_tag"..HEAD --pretty=format:"%s")

          if [ -z "$commits" ]; then
            echo "skip=true" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          bump="none"

          while IFS= read -r msg; do
            if echo "$msg" | grep -qiE '^feat(\(.+\))?!:|^[a-z]+(\(.+\))?!:|BREAKING CHANGE'; then
              bump="major"
              break
            elif echo "$msg" | grep -qiE '^feat(\(.+\))?:'; then
              if [ "$bump" != "major" ]; then
                bump="minor"
              fi
            elif echo "$msg" | grep -qiE '^fix(\(.+\))?:'; then
              if [ "$bump" = "none" ]; then
                bump="patch"
              fi
            fi
          done <<< "$commits"

          if [ "$bump" = "none" ]; then
            echo "skip=true" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          case "$bump" in
            major) major=$((major + 1)); minor=0; patch=0 ;;
            minor) minor=$((minor + 1)); patch=0 ;;
            patch) patch=$((patch + 1)) ;;
          esac

          new_version="${major}.${minor}.${patch}"
          echo "version=$new_version" >> "$GITHUB_OUTPUT"
          echo "skip=false" >> "$GITHUB_OUTPUT"
          echo "Bump: $bump -> v$new_version"
      - name: Update Cargo.toml version
        if: steps.bump.outputs.skip != 'true'
        run: |
          new_version="${{ steps.bump.outputs.version }}"
          sed -i "s/^version = \".*\"/version = \"$new_version\"/" Cargo.toml
          echo "Updated Cargo.toml to version $new_version"
      - name: Commit and tag
        if: steps.bump.outputs.skip != 'true'
        run: |
          new_version="${{ steps.bump.outputs.version }}"
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add Cargo.toml
          if git diff --cached --quiet; then
            echo "Cargo.toml already at v${new_version}, skipping commit"
          else
            git commit -m "chore(release): v${new_version}"
          fi
          git tag "v${new_version}"
          git push origin main --tags
      - name: Trigger release workflow
        if: steps.bump.outputs.skip != 'true'
        run: gh workflow run release.yml --ref "v${{ steps.bump.outputs.version }}"
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}