name: CI/CD — Docker build & push

on:
  push:
    branches: [main]
    tags: ['v*']
  pull_request:
    branches: [main]
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}

jobs:
  test:
    name: Syntax & generator checks
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-node@v4
        with:
          node-version: 22

      - name: Install deps
        run: npm ci --omit=dev

      - name: Syntax check
        run: node --check index.js && node --check lib/generator.js

      - name: Generator smoke test
        run: node tests/smoke.mjs

  build:
    name: Build Docker image
    runs-on: ubuntu-latest
    needs: test
    permissions:
      contents: read
      packages: write
    steps:
      - uses: actions/checkout@v4

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

      - name: Log in to GHCR (only on push to main/tags)
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Docker meta (tags & labels)
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=ref,event=branch
            type=ref,event=pr
            type=sha
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}

      - name: Build (and push on main/tags)
        uses: docker/build-push-action@v6
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  deploy:
    name: Report ready image
    runs-on: ubuntu-latest
    needs: build
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
    steps:
      - name: Summary
        run: |
          echo "### Image published" >> "$GITHUB_STEP_SUMMARY"
          echo "\`${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest\` — готов к запуску:" >> "$GITHUB_STEP_SUMMARY"
          echo '```' >> "$GITHUB_STEP_SUMMARY"
          echo "docker run -d --env-file .env ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest" >> "$GITHUB_STEP_SUMMARY"
          echo '```' >> "$GITHUB_STEP_SUMMARY"