name: Publish to npm

on:
  push:
    tags:
      - 'v*'

# No workflow-level permissions — scoped per job below.

# Concurrency convention: see CONTRIBUTING.md → "GitHub Actions — Concurrency Convention".
# Tag refs are unique per release, so distinct tags run in parallel. Re-pushes of the
# same tag serialize. cancel-in-progress: false — never cancel a publish mid-flight.
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: false

jobs:
  ci:
    uses: ./.github/workflows/ci.yml
    permissions:
      contents: read
      actions: read
      # No pull-requests:write — `ci.yml`'s save-pr-meta job is gated on
      # `github.event_name == 'pull_request'`, so it never runs during a
      # tag-triggered publish. Least-privilege for release-critical paths.

  publish:
    needs: ci
    runs-on: ubuntu-latest
    timeout-minutes: 15
    permissions:
      contents: write
      id-token: write
    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
      - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
        with:
          node-version: 20
          registry-url: https://registry.npmjs.org
          # Hermetic install for the published artifact — no cache carry-over
          # from non-tag contexts. setup-node v5+ caches by default when a
          # packageManager field is present in package.json, so the explicit
          # opt-out is required to clear the zizmor cache-poisoning audit.
          # ~30s slower per release; runs rarely.
          package-manager-cache: false
      - name: Build gitnexus-shared
        run: npm install && npm run build
        working-directory: gitnexus-shared

      - run: npm ci
        working-directory: gitnexus

      - name: Verify version consistency
        shell: bash
        run: |
          TAG_VERSION="${GITHUB_REF#refs/tags/v}"
          if ! [[ "$TAG_VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9.]+)?$ ]]; then
            echo "::error::Tag does not follow semver: v$TAG_VERSION"
            exit 1
          fi
          PKG_VERSION=$(node -p "require('./package.json').version")
          if [ "$TAG_VERSION" != "$PKG_VERSION" ]; then
            echo "::error::Tag version (v$TAG_VERSION) does not match package.json version ($PKG_VERSION)"
            exit 1
          fi
          echo "Version verified: $PKG_VERSION"
        working-directory: gitnexus

      - name: Build
        run: npm run build
        working-directory: gitnexus

      - name: Dry-run publish
        run: npm publish --dry-run
        working-directory: gitnexus

      - name: Publish to npm
        run: npm publish --provenance --access public
        working-directory: gitnexus
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

      - name: Extract release notes from CHANGELOG
        id: changelog
        shell: bash
        run: |
          VERSION="${GITHUB_REF#refs/tags/v}"
          NOTES=$(awk "/^## \\[$VERSION\\]/{found=1; next} /^## \\[/{if(found) exit} found" gitnexus/CHANGELOG.md)
          if [ -z "$NOTES" ]; then
            echo "::warning::No CHANGELOG entry found for v$VERSION, falling back to auto-generated notes"
            echo "fallback=true" >> "$GITHUB_OUTPUT"
          else
            echo "$NOTES" > /tmp/release-notes.md
            echo "fallback=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Create GitHub Release
        uses: softprops/action-gh-release@b4309332981a82ec1c5618f44dd2e27cc8bfbfda # v2
        with:
          body_path: ${{ steps.changelog.outputs.fallback == 'false' && '/tmp/release-notes.md' || '' }}
          generate_release_notes: ${{ steps.changelog.outputs.fallback == 'true' }}