node {
    properties([
        parameters([
            // 分支选择参数
            gitParameter(
                branchFilter: 'origin/(.*)',
                defaultValue: 'master',
                description: 's1环境，默认master分支',
                name: 'Code_branch',
                quickFilterEnabled: true,
                selectedValue: 'DEFAULT',
                sortMode: 'NONE',
                type: 'PT_BRANCH',
                size: 1
            ),
            // 部署实例选择
            choice(
                name: 'DEPLOY_TARGETS',
                choices: ['A', 'B', 'A,B'],
                description: '选择需要部署的实例（多选格式为"A,B"）'
            ),
            // 部署顺序
            string(
                name: 'DEPLOY_ORDER',
                defaultValue: 'A',
                description: '指定部署顺序（如AB、BA，必须是已选实例的组合）'
            )
        ])
    ])

    // 环境配置（集中管理实例参数）
    def config = [
        A: [
            remoteHost: "43.130.56.138",
            projectPath: "/data/webapps/lessie_sourcing_agents",
            venvDir: "/data/webapps/lessie_sourcing_agents/venv",
            nginxBackend: "10.0.0.5",
            port: "8000",
            killScript: "/data/sh/kill_lessie_sourcing_agents.sh",
            checkScript: "/data/sh/check_lessie_agents_8000.sh",
            gunicornWorkers: 8
        ],
        B: [
            remoteHost: "43.130.53.202",
            projectPath: "/data/webapps/lessie_sourcing_agents",
            venvDir: "/data/webapps/lessie_sourcing_agents/venv",
            nginxBackend: "10.0.0.13",
            port: "8002",
            killScript: "/data/sh/kill_lessie_sourcing_agents.sh",
            checkScript: "/data/sh/check_lessie_agents_8002.sh",
            gunicornWorkers: 4
        ]
    ]

    def commonConfig = [
        nginxHost: "49.51.46.148",
        connectionTimeout: "600",
        nginxReloadScript: "/data/sh/set_s1_backend_weight_new.sh",
        waitConnectionsScript: "/data/sh/wait_s1_for_connections.sh"
    ]

    stage('拉代码') {
        checkout scm: [
            $class: 'GitSCM',
            branches: [[name: params.Code_branch]],
            userRemoteConfigs: [[
                url: 'http://172.24.16.20/python/lessie-sourcing-agents.git',
                credentialsId: 'fly_gitlab_auth'
            ]]
        ]
    }

    stage('验证参数') {
        def selectedTargets = params.DEPLOY_TARGETS.split(',').toList()
        def orderChars = params.DEPLOY_ORDER.split('').toList()
        
        if (orderChars.isEmpty()) {
            error("部署顺序不能为空，请输入如AB、BA的顺序")
        }
        
        orderChars.each { instance ->
            if (!selectedTargets.contains(instance)) {
                error("部署顺序包含未选择的实例: ${instance}，已选实例：${params.DEPLOY_TARGETS}")
            }
        }
        
        def uniqueOrder = orderChars.unique()
        if (uniqueOrder.size() != orderChars.size()) {
            error("部署顺序包含重复实例: ${params.DEPLOY_ORDER}")
        }
        
        echo "✅ 参数验证通过：已选实例=${selectedTargets}，部署顺序=${orderChars}"
        env.VALID_ORDER = params.DEPLOY_ORDER
    }

    stage('动态部署') {
        def orderChars = env.VALID_ORDER.split('').toList()
        orderChars.each { instance ->
            echo "===== 开始部署实例 ${instance} ====="
            
            // 实例部署的5个步骤（直接在循环中定义stage，无嵌套）
            stage("${instance}:脱离后端组") {
                def cfg = config[instance]
                sh "ssh ${commonConfig.nginxHost} 'sh ${commonConfig.nginxReloadScript} ${cfg.nginxBackend} ${cfg.port} down'"
                sh "ssh ${cfg.remoteHost} 'sh ${commonConfig.waitConnectionsScript} ${cfg.port} ${commonConfig.connectionTimeout}'"
            }

            stage("${instance}下线&同步") {
                def cfg = config[instance]
                sh "ssh ${cfg.remoteHost} 'sh ${cfg.killScript} ${cfg.port}'"
                sh """
                    ssh ${cfg.remoteHost} 'mkdir -p ${cfg.projectPath}'
                    rsync -avz --exclude 'venv' --exclude '.git' ${WORKSPACE}/ ${cfg.remoteHost}:${cfg.projectPath}/
                """
            }

            stage("${instance}依赖&启动") {
                def cfg = config[instance]
                sh """
                    ssh ${cfg.remoteHost} '
                        cd ${cfg.projectPath}
                        source ~/.bashrc
                        conda activate search
                        source ${cfg.venvDir}/bin/activate 
                        pip install --upgrade pip
                        pip install -r requirements.txt
                        TIMESTAMP=\$(date +"%Y%m%d_%H%M%S")
                        LOGFILE="${cfg.projectPath}/logs/lessie_sourcing_agents_\${TIMESTAMP}.log"
                        nohup env APP_ENV=s1 gunicorn -w ${cfg.gunicornWorkers} -k uvicorn.workers.UvicornWorker \
                            -b 0.0.0.0:${cfg.port} --timeout 300 dialogue.app:app \
                            --max-requests 500 --max-requests-jitter 50 \
                            > "\$LOGFILE" 2>&1 & 
                        ln -sf "\$LOGFILE" ${cfg.projectPath}/logs/lessie_sourcing_agents_latest.log
                    '
                """
            }

            stage("探测${instance}探测服务") {
                def cfg = config[instance]
                sh "sleep 5"
                sh "ssh ${cfg.remoteHost} 'head -n 300 ${cfg.projectPath}/logs/lessie_sourcing_agents_latest.log | grep -i error || echo 未发现错误日志'"
                sh "ssh ${cfg.remoteHost} 'sh ${cfg.checkScript}'"
            }

            stage("恢复${instance}流量") {
                def cfg = config[instance]
                sh "ssh ${commonConfig.nginxHost} 'sh ${commonConfig.nginxReloadScript} ${cfg.nginxBackend} ${cfg.port} up'"
            }
            
            echo "===== 实例 ${instance} 部署完成 ====="
        }
    }

    echo '✅ 所有选中的实例部署成功！'
}