pipeline {
    agent any

    environment {
        NODE_VERSION = '18'
        NPM_REGISTRY = 'https://registry.npmmirror.com'
        PROJECT_NAME = 'novalon-website'
        SERVER_IP = '139.155.109.62'
        SERVER_USER = 'root'
        DEPLOY_ROOT = '/home/novalon/docker-app'
        STATIC_DIR = 'novalon-static'
        NGINX_CONTAINER = 'novalon-nginx-secure'
        DOMAIN = 'https://novalon.cn'
        BACKUP_RETENTION_COUNT = 3
    }

    options {
        buildDiscarder(logRotator(numToKeepStr: '10', artifactNumToKeepStr: '5'))
        timeout(time: 45, unit: 'MINUTES')
        timestamps()
        ansiColor('xterm')
        disableConcurrentBuilds()
    }

    triggers {
        GenericTrigger(
            genericVariables: [
                [key: 'ref', value: '$.ref'],
                [key: 'repository', value: '$.repository.full_name'],
                [key: 'commit_sha', value: '$.after'],
                [key: 'commit_message', value: '$.commits[0].message']
            ],
            token: '${PROJECT_NAME}-ci-token',
            causeString: 'Triggered by $ref on $repository (Commit: $commit_sha)',
            printContributedVariables: true,
            printPostContent: true,
            silentResponse: false,
            regexpFilterText: '$ref',
            regexpFilterExpression: '^(refs/heads/main|refs/heads/develop)$'
        )
    }

    parameters {
        booleanParam(
            defaultValue: false,
            description: '是否部署到生产环境（仅在 main 分支且测试通过后可用）',
            name: 'DEPLOY_TO_PRODUCTION'
        )
    }

    stages {
        stage('🔧 环境检测与准备') {
            steps {
                echo "=========================================="
                echo "🚀 Novalon Website CI/CD Pipeline"
                echo "🐳 Docker Shell Mode (参考 deploy-dist.sh)"
                echo "=========================================="

                sh '''
                    echo "🔍 检测环境依赖..."

                    echo ""
                    echo "--- 系统信息 ---"
                    uname -a
                    whoami
                    pwd

                    echo ""
                    echo "--- 工具版本检查 ---"
                    node --version 2>/dev/null || echo "❌ Node.js 未安装"
                    npm --version 2>/dev/null || echo "❌ npm 未安装"
                    git --version || echo "❌ Git 未安装"
                    ssh -V || echo "❌ SSH 未安装"
                    rsync --version | head -1 || echo "❌ rsync 未安装"
                    curl --version | head -1 || echo "❌ curl 未安装"

                    echo ""
                    echo "--- SSH 连接测试 ---"
                    if ssh -o StrictHostKeyChecking=no -o ConnectTimeout=5 ${SERVER_USER}@${SERVER_IP} "hostname && whoami"; then
                        echo "✅ SSH 连接成功"
                    else
                        echo "❌ SSH 连接失败！请检查："
                        echo "   1. SSH 密钥是否已挂载到 Jenkins 容器"
                        echo "   2. 生产服务器的 authorized_keys 是否包含公钥"
                        exit 1
                    fi

                    echo ""
                    echo "--- npm registry 测试 ---"
                    npm config get registry || npm config set registry ${NPM_REGISTRY}
                '''

                nodejs(nodeJSInstallationName: "${NODE_VERSION}") {
                    sh 'node --version && npm --version'
                }
            }
        }

        stage('📥 安装依赖') {
            steps {
                checkout scm

                nodejs(nodeJSInstallationName: "${NODE_VERSION}") {
                    sh '''
                        echo "📦 安装项目依赖..."
                        
                        if [ -f "package-lock.json" ]; then
                            rm -rf node_modules package-lock.json
                            npm ci --registry=${NPM_REGISTRY} --prefer-offline --no-audit --no-fund || {
                                echo "⚠️  npm ci 失败，尝试 npm install..."
                                npm install --registry=${NPM_REGISTRY} --legacy-peer-deps
                            }
                        else
                            rm -rf node_modules
                            npm install --registry=${NPM_REGISTRY} --legacy-peer-deps
                        fi

                        echo "✅ 依赖安装完成"
                        du -sh node_modules | awk '{print "📊 大小: " $1}'
                    '''
                }
            }
        }

        stage('🔍 代码质量检查') {
            parallel {
                stage('ESLint') {
                    steps {
                        nodejs(nodeJSInstallationName: "${NODE_VERSION}") {
                            sh 'npm run lint || exit 1'
                        }
                    }
                }
                stage('TypeScript') {
                    steps {
                        nodejs(nodeJSInstallationName: "${NODE_VERSION}") {
                            sh 'npm run type-check || exit 1'
                        }
                    }
                }
            }
        }

        stage('🧪 单元测试') {
            steps {
                nodejs(nodeJSInstallationName: "${NODE_VERSION}") {
                    sh '''
                        export CI=true
                        npm run test:coverage:check || exit 1
                    '''
                }
            }
            post {
                always {
                    publishHTML(target: [
                        allowMissing: true,
                        reportDir: 'coverage',
                        reportFiles: 'index.html',
                        reportName: 'Coverage Report'
                    ])
                }
            }
        }

        stage('🏗️ 构建 dist') {
            steps {
                nodejs(nodeJSInstallationName: "${NODE_VERSION}") {
                    sh '''
                        set -e
                        
                        echo "🧹 清理旧构建..."
                        rm -rf .next dist

                        echo "🔨 执行 Next.js 构建..."
                        npm run build:clean

                        echo ""
                        echo "✅ 构建完成！验证产物..."
                        
                        if [ ! -d "dist" ]; then
                            echo "❌ dist 目录不存在"
                            exit 1
                        fi

                        FILE_COUNT=$(find dist -type f | wc -l)
                        DIST_SIZE=$(du -sh dist | cut -f1)
                        echo "📊 文件数: $FILE_COUNT, 大小: $DIST_SIZE"
                    '''
                }
            }
            post {
                success {
                    archiveArtifacts artifacts: 'dist/**', fingerprint: true
                }
            }
        }

        stage('🚀 部署到生产环境') {
            when {
                allOf {
                    branch 'main'
                    expression { return params.DEPLOY_TO_PRODUCTION == true }
                }
            }
            steps {
                echo "⚠️  准备部署到生产环境: ${DOMAIN}"
                sleep(time: 3, unit: 'SECONDS')

                sh """
                    set -e
                    
                    DIST_DIR='dist'
                    
                    echo "=========================================="
                    echo "📋 步骤 1: 检查 dist 目录"
                    echo "=========================================="
                    if [ ! -d "\$DIST_DIR" ]; then
                        echo "❌ dist 目录不存在，请先构建"
                        exit 1
                    fi
                    DIST_SIZE=\$(du -sh "\$DIST_DIR" | cut -f1)
                    echo "✅ dist 目录大小: \$DIST_SIZE"

                    echo ""
                    echo "=========================================="
                    echo "📋 步骤 2: 验证 SSH 连接"
                    echo "=========================================="
                    if ! ssh -o ConnectTimeout=5 ${SERVER_USER}@${SERVER_IP} exit; then
                        echo "❌ 无法连接到服务器 ${SERVER_IP}"
                        exit 1
                    fi
                    echo "✅ SSH 连接验证成功"

                    echo ""
                    echo "=========================================="
                    echo "📋 步骤 3: 备份旧版本"
                    echo "=========================================="
                    ssh ${SERVER_USER}@${SERVER_IP} "
                        set -e
                        STATIC_PATH='${DEPLOY_ROOT}/${STATIC_DIR}'
                        TIMESTAMP=\$(date +%Y%m%d_%H%M%S)
                        BACKUP_PATH='${DEPLOY_ROOT}/${STATIC_DIR}_backup_\${TIMESTAMP}'
                        
                        if [ -d \"\$STATIC_PATH\" ]; then
                            echo \"📦 备份旧版本到: \$BACKUP_PATH\"
                            cp -r \"\$STATIC_PATH\" \"\$BACKUP_PATH\"
                            echo \"✅ 备份完成\"
                            
                            echo \"🧹 清理旧备份（保留最近 ${BACKUP_RETENTION_COUNT} 个）...\"
                            cd '${DEPLOY_ROOT}'
                            ls -dt ${STATIC_DIR}_backup_* 2>/dev/null | tail -n +$((BACKUP_RETENTION_COUNT + 1)) | xargs rm -rf 2>/dev/null || true
                            echo \"✅ 清理完成\"
                        else
                            echo \"ℹ️  无需备份（目录不存在），首次部署\"
                        fi
                    "

                    echo ""
                    echo "=========================================="
                    echo "📋 步骤 4: 上传 dist 目录"
                    echo "=========================================="
                    ssh ${SERVER_USER}@${SERVER_IP} "mkdir -p '${DEPLOY_ROOT}/${STATIC_DIR}'"
                    
                    echo "📤 使用 rsync 同步文件..."
                    rsync -avz --delete "\$DIST_DIR/" ${SERVER_USER}@${SERVER_IP}:${DEPLOY_ROOT}/${STATIC_DIR}/
                    
                    FILE_COUNT=\$(find \$DIST_DIR -type f | wc -l)
                    echo "✅ 上传完成: \$FILE_COUNT 个文件, 总大小 \$DIST_SIZE"

                    echo ""
                    echo "=========================================="
                    echo "📋 步骤 5: 设置权限"
                    echo "=========================================="
                    ssh ${SERVER_USER}@${SERVER_IP} "
                        set -e
                        STATIC_PATH='${DEPLOY_ROOT}/${STATIC_DIR}'
                        chown -R www-data:www-data \"\$STATIC_PATH\" 2>/dev/null || true
                        chmod -R 755 \"\$STATIC_PATH\"
                        echo \"✅ 权限设置完成\"
                    "

                    echo ""
                    echo "=========================================="
                    echo "📋 步骤 6: 重载 Nginx"
                    echo "=========================================="
                    ssh ${SERVER_USER}@${SERVER_IP} "
                        set -e
                        if docker exec ${NGINX_CONTAINER} nginx -t; then
                            docker exec ${NGINX_CONTAINER} nginx -s reload
                            echo \"✅ Nginx 重载成功\"
                        else
                            echo \"⚠️  Nginx 配置检测失败，尝试重启容器...\"
                            docker restart ${NGINX_CONTAINER}
                            sleep 3
                            echo \"✅ Nginx 容器已重启\"
                        fi
                    "

                    echo ""
                    echo "=========================================="
                    echo "📋 步骤 7: 验证部署"
                    echo "=========================================="
                    sleep 3
                    
                    HTTP_STATUS=\$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 10 ${DOMAIN})
                    if [ "\$HTTP_STATUS" = "200" ]; then
                        echo "✅ 主页访问正常 (HTTP \$HTTP_STATUS)"
                    else
                        echo "❌ 主页返回异常状态码: \$HTTP_STATUS"
                        exit 1
                    fi

                    echo ""
                    echo "🔍 检查关键页面..."
                    for PAGE in "/contact" "/about" "/products" "/services"; do
                        STATUS=\$(curl -s -o /dev/null -w '%{http_code}' --connect-timeout 5 \${DOMAIN}\$PAGE)
                        if [ "\$STATUS" = "200" ]; then
                            echo "   ✅ \$PAGE (\$STATUS)"
                        else
                            echo "   ⚠️  \$PAGE (\$STATUS) - 需要关注"
                        fi
                    done

                    echo ""
                    echo "🎉 部署成功！"
                    echo "📋 访问地址:"
                    echo "   HTTP:  http://${SERVER_IP}"
                    echo "   HTTPS: https://novalon.cn"
                """
            }
            post {
                failure {
                    echo "❌ 部署失败！正在执行自动回滚..."

                    script {
                        try {
                            sh """
                                ssh ${SERVER_USER}@${SERVER_IP} '
                                    set -e
                                    LATEST_BACKUP=\$(ls -dt ${DEPLOY_ROOT}/${STATIC_DIR}_backup_* 2>/dev/null | head -1)
                                    
                                    if [ -n "\$LATEST_BACKUP" ]; then
                                        echo "🔄 回滚到: \$LATEST_BACKUP"
                                        rm -rf "${DEPLOY_ROOT}/${STATIC_DIR}"
                                        cp -r "\$LATEST_BACKUP" "${DEPLOY_ROOT}/${STATIC_DIR}"
                                        
                                        if docker exec ${NGINX_CONTAINER} nginx -t; then
                                            docker exec ${NGINX_CONTAINER} nginx -s reload
                                        else
                                            docker restart ${NGINX_CONTAINER}
                                        fi
                                        echo "✅ 回滚完成"
                                    else
                                        echo "❌ 未找到可用备份！需要手动介入"
                                        exit 1
                                    fi
                                '
                            """
                        } catch (Exception e) {
                            echo "❌ 自动回滚失败: ${e.getMessage()}"
                            echo "🚨 需要立即手动介入！"
                        }
                    }
                }
            }
        }
    }

    post {
        always {
            script {
                def result = currentBuild.result ?: 'SUCCESS'
                def duration = currentBuild.durationString.replace(' and counting', '')

                echo """
╔════════════════════════════════════════════╗
║         📊 Jenkins Pipeline 报告           ║
╠════════════════════════════════════════════╣
║ 项目:     ${env.JOB_NAME}
║ 构建号:   #${env.BUILD_NUMBER}
║ 结果:     ${result}
║ 耗时:     ${duration}
║ 详情:     ${env.BUILD_URL}
╚════════════════════════════════════════════╝
"""
            }
        }

        success {
            echo "✅ Pipeline 执行成功！"
        }

        failure {
            echo "❌ Pipeline 执行失败！请查看日志。"
        }
    }
}