pipeline {
    agent any

    environment {
        DEPLOY_DIR  = '/var/www/zioinfo'
        APP_DIR     = '/opt/zioinfo/app'
        JAVA_HOME   = '/usr/lib/jvm/java-21-openjdk-amd64'
        MVN         = '/usr/bin/mvn'
        NODE_HOME   = '/usr/bin'
    }

    options {
        buildDiscarder(logRotator(numToKeepStr: '5'))
        timeout(time: 20, unit: 'MINUTES')
    }

    stages {
        stage('Checkout') {
            steps {
                echo "브랜치: ${env.GIT_BRANCH ?: 'main'} | 커밋: ${env.GIT_COMMIT?.take(7) ?: '-'}"
                checkout scm
            }
        }

        stage('Frontend Build') {
            steps {
                dir('frontend') {
                    sh '''
                        echo "=== [1/3] React 빌드 ==="
                        npm ci --legacy-peer-deps --prefer-offline 2>/dev/null || npm install --legacy-peer-deps
                        npm run build
                        echo "빌드 결과: $(ls ../backend/src/main/resources/static/assets/ | wc -l) 파일"
                    '''
                }
            }
        }

        stage('Backend Build') {
            steps {
                dir('backend') {
                    sh '''
                        echo "=== [2/3] Spring Boot 빌드 ==="
                        ${MVN} clean package -DskipTests -q
                        JAR=$(find target -name "*.jar" ! -name "*sources*" | head -1)
                        echo "JAR: $JAR ($(du -sh $JAR | cut -f1))"
                    '''
                }
            }
        }

        stage('Deploy') {
            steps {
                sh '''
                    echo "=== [3/3] 배포 ==="
                    JAR=$(find backend/target -name "*.jar" ! -name "*sources*" | head -1)

                    # 앱 디렉터리 확인
                    mkdir -p ${APP_DIR} ${DEPLOY_DIR}

                    # JAR 배포
                    cp "$JAR" ${APP_DIR}/app.jar

                    # React 정적 파일 배포
                    cp -r backend/src/main/resources/static/. ${DEPLOY_DIR}/

                    # Spring Boot 서비스 재시작
                    systemctl restart zioinfo || true
                    sleep 4

                    # 헬스체크
                    for i in 1 2 3 4 5; do
                        HTTP=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:8080/api/company 2>/dev/null)
                        if [ "$HTTP" = "200" ]; then
                            echo "배포 성공 (Spring Boot HTTP $HTTP)"
                            exit 0
                        fi
                        echo "헬스체크 ${i}/5 대기중 (HTTP: $HTTP)..."
                        sleep 3
                    done
                    echo "경고: Spring Boot 응답 없음 — 서비스 상태 확인 필요"
                '''
            }
        }
    }

    post {
        success {
            echo "✅ 배포 완료: ${currentBuild.displayName} (${currentBuild.durationString})"
        }
        failure {
            echo "❌ 배포 실패: ${currentBuild.displayName} — 로그 확인 필요"
        }
        always {
            cleanWs(cleanWhenNotBuilt: false, cleanWhenSuccess: false)
        }
    }
}