name: Deploy KCG

on:
  push:
    branches: [main]

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

      # ═══ Frontend ═══
      - 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: |
          rm -rf /deploy/kcg/*
          cp -r frontend/dist/* /deploy/kcg/
          echo "Frontend deployed at $(date '+%Y-%m-%d %H:%M:%S')"

      # ═══ Backend ═══
      - name: Install JDK 21 + Maven
        run: |
          apt-get update -qq
          apt-get install -y -qq openjdk-21-jdk-headless maven > /dev/null 2>&1
          java -version
          mvn --version

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

      - name: Deploy backend
        env:
          GOOGLE_CLIENT_ID: ${{ secrets.GOOGLE_CLIENT_ID }}
          JWT_SECRET: ${{ secrets.JWT_SECRET }}
        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

          # Secrets → 환경변수 파일 (빈 값은 제외)
          : > $DEPLOY_DIR/.env
          [ -n "$GOOGLE_CLIENT_ID" ] && echo "GOOGLE_CLIENT_ID=${GOOGLE_CLIENT_ID}" >> $DEPLOY_DIR/.env
          [ -n "$JWT_SECRET" ] && echo "JWT_SECRET=${JWT_SECRET}" >> $DEPLOY_DIR/.env

          # JAR 교체 + 재시작 트리거
          cp backend/target/kcg.jar $DEPLOY_DIR/kcg.jar
          date '+%s' > $DEPLOY_DIR/.deploy-trigger
          echo "Backend deployed at $(date '+%Y-%m-%d %H:%M:%S')"