name: release

# Releases are cut automatically from main: after the ci workflow passes on a
# main push, the version job bumps semver from conventional commit subjects
# (BREAKING/! -> major, feat -> minor, otherwise patch), pushes the tag, and
# the build jobs release it. Manual tags are not used; workflow_dispatch
# re-runs the same flow on demand.
on:
  workflow_run:
    workflows: [ci]
    types: [completed]
    branches: [main]
  workflow_dispatch:

permissions:
  contents: write
  packages: write

# Two merges racing would compute the same tag; serialize instead.
concurrency:
  group: release
  cancel-in-progress: false

jobs:
  version:
    runs-on: ubuntu-latest
    if: github.event_name != 'workflow_run' || github.event.workflow_run.conclusion == 'success'
    outputs:
      version: ${{ steps.v.outputs.version }}
      semver: ${{ steps.v.outputs.semver }}
      major_minor: ${{ steps.v.outputs.major_minor }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.event.workflow_run.head_sha || github.sha }}

      - id: v
        run: |
          set -euo pipefail
          latest="$(git tag -l 'v*' --sort=-v:refname | head -n1)"
          if [ -z "$latest" ]; then
            version="v0.1.0"; bump="minor"
          else
            subjects="$(git log "$latest"..HEAD --format=%s)"
            if grep -qiE 'BREAKING[ -]CHANGE|^[a-z]+(\([^)]*\))?!:' <<< "$subjects"; then
              bump="major"
            elif grep -qE '^feat(\([^)]*\))?:' <<< "$subjects"; then
              bump="minor"
            else
              bump="patch"
            fi
            IFS=. read -r major minor patch <<< "${latest#v}"
            case "$bump" in
              major) major=$((major+1)); minor=0; patch=0 ;;
              minor) minor=$((minor+1)); patch=0 ;;
              *)     patch=$((patch+1)) ;;
            esac
            version="v${major}.${minor}.${patch}"
          fi
          semver="${version#v}"
          IFS=. read -r mj mn _ <<< "$semver"
          {
            echo "version=$version"
            echo "semver=$semver"
            echo "major_minor=$mj.$mn"
          } >> "$GITHUB_OUTPUT"
          echo "latest=${latest:-none} bump=$bump -> $version"

      - name: Push tag
        env:
          VERSION: ${{ steps.v.outputs.version }}
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git tag "$VERSION"
          git push origin "$VERSION"

  binaries:
    needs: version
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0  # goreleaser needs full history for tag + changelog
          ref: ${{ github.event.workflow_run.head_sha || github.sha }}

      - uses: actions/setup-node@v4
        with:
          node-version: 24
          cache: npm
      - run: npm ci
      - run: npm run build

        # go:embed all:dist reads internal/web/dist at compile time.
        # Merge into dist/ — don't rm -rf: the tracked .keep must survive or
        # goreleaser aborts on the dirty tree.
      - run: cp -r apps/frontend/dist/. apps/backend/internal/web/dist/

      - uses: actions/setup-go@v5
        with:
          go-version-file: apps/backend/go.mod
          cache-dependency-path: apps/backend/go.sum

      - uses: goreleaser/goreleaser-action@v6
        with:
          distribution: goreleaser
          version: "~> v2"
          args: release --clean
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          GORELEASER_CURRENT_TAG: ${{ needs.version.outputs.version }}

  docker:
    needs: version
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.workflow_run.head_sha || github.sha }}

      - uses: docker/setup-buildx-action@v3

      - uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - uses: docker/metadata-action@v5
        id: meta
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            type=raw,value=${{ needs.version.outputs.semver }}
            type=raw,value=${{ needs.version.outputs.major_minor }}
            type=raw,value=latest

      - uses: docker/build-push-action@v6
        with:
          context: .
          file: infra/Dockerfile
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max