name: Deploy KCG

on:
  push:
    branches: [main]

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      # ═══ Frontend ═══
      - uses: actions/setup-node@v4
        with:
          node-version: '24'

      - name: Configure npm registry
        run: |
          echo "registry=https://nexus.gc-si.dev/repository/npm-public/" > frontend/.npmrc
          echo "//nexus.gc-si.dev/repository/npm-public/:_auth=${{ secrets.NEXUS_NPM_AUTH }}" >> frontend/.npmrc

      - name: Build frontend
        working-directory: frontend
        env:
          VITE_GOOGLE_CLIENT_ID: ${{ secrets.GOOGLE_CLIENT_ID }}
        run: |
          npm ci
          npx vite build

      - name: Deploy frontend
        run: |
          mkdir -p /deploy/kcg
          rm -rf /deploy/kcg/*
          cp -r frontend/dist/* /deploy/kcg/

      # ═══ Backend ═══
      - name: Install JDK 17 + Maven
        run: |
          sudo apt-get update -qq
          sudo apt-get install -y -qq openjdk-17-jdk-headless maven

      - name: Build backend
        working-directory: backend
        run: mvn -B clean package -DskipTests

      - name: Deploy backend
        run: |
          DEPLOY_DIR=/deploy/kcg-backend
          mkdir -p $DEPLOY_DIR/backup

          # JAR 백업 (최근 5개 유지)
          if [ -f $DEPLOY_DIR/kcg.jar ]; then
            cp $DEPLOY_DIR/kcg.jar $DEPLOY_DIR/backup/kcg-$(date +%Y%m%d%H%M%S).jar
            ls -t $DEPLOY_DIR/backup/*.jar | tail -n +6 | xargs -r rm
          fi

          # 서비스 중지 → JAR 교체 → 서비스 시작
          sudo systemctl stop kcg-backend || true
          cp backend/target/kcg.jar $DEPLOY_DIR/kcg.jar
          sudo systemctl start kcg-backend

      - name: Health check
        run: |
          echo "Waiting for backend to start..."
          for i in $(seq 1 30); do
            HTTP_CODE=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:8080/api/auth/me 2>/dev/null || echo "000")
            if [ "$HTTP_CODE" != "000" ]; then
              echo "Backend is up (HTTP $HTTP_CODE, attempt $i)"
              exit 0
            fi
            sleep 2
          done
          echo "Backend health check failed after 60s"
          exit 1