// Groovy 辅助函数，用于发送钉钉通知。(保持不变)
@NonCPS
def sendDingTalkNotification(Map config) {
    def message = config.get('message', '来自 Jenkins 的通知')
    def webhookEnvVarName = config.get('webhookEnvVarName') // 存储 Webhook URL 的环境变量名称
    def author = config.get('author', '未知用户')
    def jobName = config.get('jobName', env.JOB_NAME ?: 'N/A')
    def buildNumber = config.get('buildNumber', env.BUILD_NUMBER ?: 'N/A')
    def enabled = config.get('enabled', false)

    if (enabled && webhookEnvVarName) {
        def webhookUrl = env[webhookEnvVarName] 
        if (!webhookUrl) {
            echo "钉钉 Webhook URL 未通过环境变量 ${webhookEnvVarName} 找到。跳过通知。"
            return
        }
        def finalMessage = "BZPT.发布 (${jobName}#${buildNumber}):\n${message}"
        if (author && author != "未知用户" && author.trim() != "") {
            finalMessage += "\n@${author.trim()}"
        }
        def payload = groovy.json.JsonOutput.toJson([msgtype: "text", text: [content: finalMessage]])
        def curlResult = sh script: """
            echo "正在发送钉钉通知..."
            curl -X POST -H 'Content-Type: application/json' -d '${payload}' '${webhookUrl}' --silent --show-error --connect-timeout 10 --max-time 15
        """, returnStatus: true 
        if (curlResult != 0) {
            echo "警告：钉钉通知可能发送失败 (curl 退出码: ${curlResult})。"
        } else {
            echo "钉钉通知发送成功。"
        }
    } else {
        echo "钉钉通知已跳过 (可能已禁用、未设置 Webhook 凭证或未找到 Webhook URL 的环境变量)。"
    }
}

pipeline {
    agent any

    // triggers 块现在会使用在 Jenkins UI 中配置的 SCM 信息进行轮询
    triggers {
        pollSCM('H/5 * * * *')
    }

    parameters {
        // Git 参数现在主要用于 UI 显示和分支选择，实际 SCM 配置在 Job UI 中
        string(name: 'GIT_REPO_URL', defaultValue: 'http://111.230.114.47:3000/yidongliang/gateway.git', description: 'Git 仓库 URL (仅供参考，实际配置在Job的SCM部分)')
        string(name: 'GIT_BRANCH', defaultValue: 'stage', description: '要拉取的 Git 分支 (例如：develop, stage, master)')
        credentials(name: 'GIT_CREDENTIALS_ID', defaultValue: 'jenkins', description: 'Git 凭证 ID', required: true)

        // Docker 构建参数 (保持不变)
        string(name: 'DOCKERFILE_PATH_IN_REPO', defaultValue: 'Dockerfile', description: '仓库中 Dockerfile 的路径')
        string(name: 'DOCKER_REGISTRY_URL', defaultValue: 'https://106.52.199.114:5000', description: 'Docker 镜像仓库 URL。留空则不推送。')
        string(name: 'DOCKER_IMAGE_NAME', defaultValue: 'bzpt.gateway', description: 'Docker 镜像名称')
        string(name: 'IMAGE_BASE_TAG', defaultValue: '1.0', description: '镜像标签的基础部分')
        credentials(name: 'DOCKER_CREDENTIALS_ID', defaultValue: 'dockerregister', description: 'Docker 镜像仓库凭证 ID', required: false)
        booleanParam(name: 'PUSH_LATEST_TAG', defaultValue: true, description: '是否同时创建并推送 "latest" 标签？')

        // 钉钉通知参数 (保持不变)
        booleanParam(name: 'SEND_DINGTALK_NOTIFICATIONS', defaultValue: true, description: '是否发送钉钉通知？')
        credentials(name: 'DINGTALK_WEBHOOK_CREDENTIAL_ID', defaultValue: 'stage-publish-dingding', description: '存储钉钉 Webhook URL 的凭证 ID', required: false)
    }

    environment {
        LAST_COMMIT_AUTHOR = "gateway-stage"
        DINGTALK_WEBHOOK_ENV_VAR_NAME = 'DINGTALK_WEBHOOK_URL_FROM_CREDS'
    }

    stages {
        // =========================================================================
        // **核心改动：不再需要“拉取代码”阶段。**
        // 代码已由 Jenkins 根据 UI 配置自动检出。
        // 第一个阶段直接开始进行初始化。
        // =========================================================================
        stage('0. 初始化和准备') {
            steps {
                // 清理工作空间是好习惯，但注意它会删除所有文件，包括 Jenkins 自动检出的代码。
                // 如果需要重新检出，可以使用 checkout scm。但通常在此场景下不需要 cleanWs。
                // 我们暂时保留它，因为它在您的原始脚本中。
                cleanWs()

                // **重要**：由于 cleanWs 删除了所有内容，我们需要再次检出代码。
                // `checkout scm` 是一个特殊的步骤，它会使用在 Jenkins UI 中配置的 SCM 信息。
                echo "重新检出代码以确保工作空间内容最新..."
                checkout scm

                script {
                    echo "代码已检出。开始初始化构建环境..."
                    
                    // 构造带 registry 的完整镜像名
                    def preparedImageNameWithRegistry = params.DOCKER_IMAGE_NAME
                    env.PREPARED_IMAGE_NAME = preparedImageNameWithRegistry
                    echo "构建的镜像全名 (不含标签): ${env.PREPARED_IMAGE_NAME}"

                    // 现在可以安全地执行 git 命令
                    def shortCommit = sh(script: 'git rev-parse --short HEAD', returnStdout: true).trim()
                    env.IMAGE_TAG = "${params.IMAGE_BASE_TAG}.${BUILD_NUMBER}-${shortCommit}"
                    echo "生成的 IMAGE_TAG: ${env.IMAGE_TAG}"

                    try {
                        env.LAST_COMMIT_AUTHOR = sh(script: 'git log -1 --pretty=format:"%an"', returnStdout: true).trim()
                    } catch (e) {
                        echo "警告：无法获取最后提交的作者。 ${e.getMessage()}"
                        env.LAST_COMMIT_AUTHOR = "未知用户"
                    }
                    echo "最后提交的作者: ${env.LAST_COMMIT_AUTHOR}"
                }
            }
        }
        
        // 后续阶段保持不变，仅序号变更
        stage('1. 构建 Docker 镜像') {
            steps {
                script {
                    def dockerfilePath = params.DOCKERFILE_PATH_IN_REPO
                    if (!fileExists(dockerfilePath)) {
                        error "在工作空间相对路径下未找到 Dockerfile: ${dockerfilePath}"
                    }
                    if (!env.PREPARED_IMAGE_NAME || !env.IMAGE_TAG) {
                        error "构建 Docker 镜像所需的 PREPARED_IMAGE_NAME 或 IMAGE_TAG 未设置。"
                    }
                    
                    def fullImageNameWithTag = "${env.PREPARED_IMAGE_NAME}:${env.IMAGE_TAG}"
                    docker.build(fullImageNameWithTag, "-f \"${dockerfilePath}\" .")
                    echo "Docker 镜像 ${fullImageNameWithTag} 构建成功。"

                    if (params.PUSH_LATEST_TAG) {
                        def fullImageNameLatest = "${env.PREPARED_IMAGE_NAME}:latest"
                        sh "docker tag ${fullImageNameWithTag} ${fullImageNameLatest}"
                        echo "成功将镜像标记为: ${fullImageNameLatest}"
                    }
                }
            }
        }

        stage('2. 推送 Docker 镜像 (可选)') {
            when { expression { params.DOCKER_REGISTRY_URL != "" } }
            steps {
                script {
                    def fullImageNameWithTag = "${env.PREPARED_IMAGE_NAME}:${env.IMAGE_TAG}"
                    def fullImageNameLatest = "${env.PREPARED_IMAGE_NAME}:latest"

                    docker.withRegistry(params.DOCKER_REGISTRY_URL, params.DOCKER_CREDENTIALS_ID) {
                        echo "正在推送镜像: ${fullImageNameWithTag}"
                        docker.image(fullImageNameWithTag).push()
                        echo "镜像 ${fullImageNameWithTag} 推送成功。"

                        if (params.PUSH_LATEST_TAG) {
                            echo "正在推送 latest 镜像: ${fullImageNameLatest}"
                            docker.image(fullImageNameLatest).push()
                            echo "镜像 ${fullImageNameLatest} 推送成功。"
                        }
                    }
                }
            }
        }
    }
    // post 块定义无需任何修改，保持原样
    post {
        always {
            echo "流水线结束。最终状态: ${currentBuild.result ?: 'IN PROGRESS'}"
        }
        success {
            script {
                if (params.SEND_DINGTALK_NOTIFICATIONS && params.DINGTALK_WEBHOOK_CREDENTIAL_ID) {
                     withCredentials([string(credentialsId: params.DINGTALK_WEBHOOK_CREDENTIAL_ID, variable: env.DINGTALK_WEBHOOK_ENV_VAR_NAME)]) {
                        sendDingTalkNotification(
                            message: "${params.DOCKER_IMAGE_NAME} 构建和推送成功。镜像: ${env.PREPARED_IMAGE_NAME}:${env.IMAGE_TAG}",
                            webhookEnvVarName: env.DINGTALK_WEBHOOK_ENV_VAR_NAME,
                            author: env.LAST_COMMIT_AUTHOR ?: '未知用户',
                            jobName: env.JOB_NAME,
                            buildNumber: env.BUILD_NUMBER,
                            enabled: params.SEND_DINGTALK_NOTIFICATIONS
                        )
                    }
                }
            }
        }
        failure {
            script {
                if (params.SEND_DINGTALK_NOTIFICATIONS && params.DINGTALK_WEBHOOK_CREDENTIAL_ID) {
                    withCredentials([string(credentialsId: params.DINGTALK_WEBHOOK_CREDENTIAL_ID, variable: env.DINGTALK_WEBHOOK_ENV_VAR_NAME)]) {
                        sendDingTalkNotification(
                            message: "${params.DOCKER_IMAGE_NAME} 构建失败。请检查控制台: ${env.BUILD_URL}console",
                            webhookEnvVarName: env.DINGTALK_WEBHOOK_ENV_VAR_NAME,
                            author: env.LAST_COMMIT_AUTHOR ?: '未知用户',
                            jobName: env.JOB_NAME,
                            buildNumber: env.BUILD_NUMBER,
                            enabled: params.SEND_DINGTALK_NOTIFICATIONS
                        )
                    }
                }
            }
        }
        aborted {
            script {
                if (params.SEND_DINGTALK_NOTIFICATIONS && params.DINGTALK_WEBHOOK_CREDENTIAL_ID) {
                     withCredentials([string(credentialsId: params.DINGTALK_WEBHOOK_CREDENTIAL_ID, variable: env.DINGTALK_WEBHOOK_ENV_VAR_NAME)]) {
                        sendDingTalkNotification(
                            message: "${params.DOCKER_IMAGE_NAME} 构建已中止。请检查控制台: ${env.BUILD_URL}console",
                            webhookEnvVarName: env.DINGTALK_WEBHOOK_ENV_VAR_NAME,
                            author: env.LAST_COMMIT_AUTHOR ?: '未知用户',
                            jobName: env.JOB_NAME,
                            buildNumber: env.BUILD_NUMBER,
                            enabled: params.SEND_DINGTALK_NOTIFICATIONS
                        )
                    }
                }
            }
        }
    }
}