name: Release

# Auto-tagging baserat på conventional commits sedan senaste taggen.
#   feat: → minor bump  (1.2.9 → 1.3.0)
#   fix:  → patch bump  (1.2.9 → 1.2.10)
#   "!:" eller "BREAKING CHANGE" → major bump (1.2.9 → 2.0.0)
# Andra prefix (chore:, docs:, ci:, refactor:, style:, test:) bumpar inte.
# Skippas tyst när inga releaseable commits hittas — t.ex. när workflow:n själv pushar version-commiten.
# Push av tag triggar deploy.yml (PACKAGES_TOKEN är en PAT så cross-workflow-triggers funkar).

on:
  push:
    branches: [main]

jobs:
  release:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.PACKAGES_TOKEN }}

      - name: Configure git
        run: |
          git config user.name "Release Bot"
          git config user.email "noreply@shcizo.se"

      - name: Determine version bump
        id: bump
        run: |
          set -euo pipefail

          LAST_TAG=$(git describe --tags --abbrev=0 --match 'v*' 2>/dev/null || echo "")
          if [ -z "$LAST_TAG" ]; then
            RANGE=""
            echo "No previous v* tag found — scanning all commits."
          else
            RANGE="${LAST_TAG}..HEAD"
            echo "Scanning commits since ${LAST_TAG}."
          fi

          BUMP="none"
          while IFS= read -r subject; do
            [ -z "$subject" ] && continue
            if echo "$subject" | grep -qE "^[a-z]+(\([^)]+\))?!:|BREAKING[ -]CHANGE"; then
              BUMP="major"
              break
            elif echo "$subject" | grep -qE "^feat(\([^)]+\))?:"; then
              [ "$BUMP" != "major" ] && BUMP="minor"
            elif echo "$subject" | grep -qE "^fix(\([^)]+\))?:"; then
              [ "$BUMP" = "none" ] && BUMP="patch"
            fi
          done < <(git log ${RANGE} --no-merges --pretty=format:%s)

          echo "Determined bump: ${BUMP}"
          echo "bump=${BUMP}" >> "$GITHUB_OUTPUT"

      - name: Compute new version
        if: steps.bump.outputs.bump != 'none'
        id: version
        run: |
          set -euo pipefail
          CURRENT=$(node -p "require('./package.json').version")
          IFS=. read -r MAJ MIN PAT <<< "$CURRENT"
          case "${{ steps.bump.outputs.bump }}" in
            major) NEW="$((MAJ+1)).0.0" ;;
            minor) NEW="${MAJ}.$((MIN+1)).0" ;;
            patch) NEW="${MAJ}.${MIN}.$((PAT+1))" ;;
          esac
          echo "Bumping ${CURRENT} → ${NEW}"
          echo "new=${NEW}" >> "$GITHUB_OUTPUT"

      - name: Update files, commit, tag, push
        if: steps.bump.outputs.bump != 'none'
        run: |
          set -euo pipefail
          NEW="${{ steps.version.outputs.new }}"

          npm version "$NEW" --no-git-tag-version

          git add package.json package-lock.json
          git commit -m "$NEW"
          git tag "v${NEW}"
          git push origin main "v${NEW}"

      - name: No-op summary
        if: steps.bump.outputs.bump == 'none'
        run: echo "No feat/fix/breaking commits since last tag — no release."