name: Deploy

# Деплоится только при изменениях основного стека.
# Obsidian-стек (CouchDB) — отдельный workflow `deploy-obsidian.yml`.
on:
  push:
    branches: [main]
    paths:
      - "backend/**"
      - "frontend/**"
      - "docker-compose.prod.yml"
      - "Caddyfile"
      - ".github/workflows/deploy.yml"
      # NB: shared compose-fragments (network) — тоже триггерят main
      # потому что Caddy шарит сеть с obsidian-stack
  workflow_dispatch:

concurrency:
  group: deploy-prod
  cancel-in-progress: false

env:
  IMAGE_BACKEND: ghcr.io/lekss361/gendesign-backend
  IMAGE_WORKER: ghcr.io/lekss361/gendesign-worker
  IMAGE_FRONTEND: ghcr.io/lekss361/gendesign-frontend

jobs:
  build-backend:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    if: github.event_name == 'workflow_dispatch' || github.ref == 'refs/heads/main'
    steps:
      - uses: actions/checkout@v4

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

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Build & push backend (lean — без Chromium)
        uses: docker/build-push-action@v6
        with:
          context: ./backend
          target: runner
          push: true
          cache-from: type=gha,scope=backend-lean
          cache-to: type=gha,mode=max,scope=backend-lean
          tags: |
            ${{ env.IMAGE_BACKEND }}:latest
            ${{ env.IMAGE_BACKEND }}:${{ github.sha }}

  build-worker:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    if: github.event_name == 'workflow_dispatch' || github.ref == 'refs/heads/main'
    steps:
      - uses: actions/checkout@v4

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

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Build & push worker (с Chromium для Playwright)
        uses: docker/build-push-action@v6
        with:
          context: ./backend
          target: runner-with-chromium
          push: true
          cache-from: type=gha,scope=worker-chromium
          cache-to: type=gha,mode=max,scope=worker-chromium
          tags: |
            ${{ env.IMAGE_WORKER }}:latest
            ${{ env.IMAGE_WORKER }}:${{ github.sha }}

  build-frontend:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    if: github.event_name == 'workflow_dispatch' || github.ref == 'refs/heads/main'
    steps:
      - uses: actions/checkout@v4

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

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Build & push frontend
        uses: docker/build-push-action@v6
        with:
          context: ./frontend
          push: true
          cache-from: type=gha,scope=frontend
          cache-to: type=gha,mode=max,scope=frontend
          tags: |
            ${{ env.IMAGE_FRONTEND }}:latest
            ${{ env.IMAGE_FRONTEND }}:${{ github.sha }}

  deploy:
    runs-on: ubuntu-latest
    needs: [build-backend, build-worker, build-frontend]
    permissions:
      contents: read
    steps:
      - name: Deploy to VM via SSH
        uses: appleboy/ssh-action@v1.0.3
        env:
          IMAGE_TAG: ${{ github.sha }}
        with:
          host: ${{ secrets.DEPLOY_HOST }}
          username: ${{ secrets.DEPLOY_USER }}
          key: ${{ secrets.DEPLOY_SSH_KEY }}
          port: ${{ secrets.DEPLOY_PORT || 22 }}
          envs: IMAGE_TAG
          script: |
            set -euo pipefail
            cd /opt/gendesign

            # Sync compose / Caddyfile / init scripts from the repo.
            # --ff-only refuses if there are local commits on the VM (we don't expect any).
            git fetch origin main
            git reset --hard origin/main

            # Sentry release tracking — записываем git-sha в .env.runtime.
            # ВАЖНО: НЕ перезаписываем файл целиком (там могут быть
            # COUCHDB_PASSWORD и др. user-managed secrets). Заменяем только
            # строку SENTRY_RELEASE или добавляем если её нет.
            mkdir -p backend
            touch backend/.env.runtime
            if grep -q '^SENTRY_RELEASE=' backend/.env.runtime; then
                sed -i "s|^SENTRY_RELEASE=.*|SENTRY_RELEASE=$IMAGE_TAG|" backend/.env.runtime
            else
                printf 'SENTRY_RELEASE=%s\n' "$IMAGE_TAG" >> backend/.env.runtime
            fi
            chmod 600 backend/.env.runtime

            # Создать external network если её нет (нужна Caddy для маршрута
            # obsidian.gendsgn.ru → couchdb из отдельного obsidian-stack).
            docker network inspect gendesign_shared >/dev/null 2>&1 \
                || docker network create gendesign_shared

            export IMAGE_TAG="$IMAGE_TAG"
            # Project name явно — `gendesign` (по имени папки auto), но
            # фиксируем для consistency с obsidian-stack (-p gendesign-obsidian).
            docker compose -p gendesign -f docker-compose.prod.yml pull
            docker compose -p gendesign -f docker-compose.prod.yml up -d

            # Caddyfile is bind-mounted; up -d won't re-read it. Reload explicitly.
            # `|| true` so a temporary Caddy hiccup doesn't fail the whole deploy.
            docker compose -p gendesign -f docker-compose.prod.yml exec -T caddy \
              caddy reload --config /etc/caddy/Caddyfile || true

            # Clean up disk: dangling layers + tagged images older than 72h that
            # nothing is using anymore. Plus build cache (we never build on prod
            # but old buildkit caches may linger from earlier compose builds).
            docker image prune -af --filter "until=72h" || true
            docker builder prune -af || true

            # Wait for backend to be healthy (up to 30 s).
            for i in $(seq 1 30); do
              curl -fsS http://localhost:8000/health && break
              sleep 1
            done