// GUARDiA ITSM — 롤백 파이프라인
// 이전 빌드 아티팩트로 즉시 롤백한다.

pipeline {
    agent any

    parameters {
        string(name: 'ITSM_SESSION_ID',  defaultValue: '', description: 'GUARDiA 바이브 세션 ID')
        string(name: 'ITSM_SR_ID',       defaultValue: '', description: '연결된 SR ID')
        string(name: 'TARGET_SERVER',    defaultValue: '', description: '배포 대상 서버명 (필수)')
        choice(name: 'DEPLOY_ENV',       choices: ['prd', 'stg', 'dev'], description: '롤백 환경')
        string(name: 'ROLLBACK_VERSION', defaultValue: '', description: '롤백 버전 (빌드 번호, 비워두면 이전 빌드)')
        string(name: 'ROLLBACK_REASON',  defaultValue: '서비스 장애', description: '롤백 사유')
        string(name: 'SOURCE_JOB',       defaultValue: '', description: '아티팩트 소스 Job 이름')
        string(name: 'WAS_TYPE',         defaultValue: 'tomcat', description: 'WAS 종류')
    }

    environment {
        SCRIPTS_ROOT  = "${WORKSPACE}/cicd/scripts/pipeline"
        NOTIFY_SCRIPT = "${WORKSPACE}/cicd/scripts/notify/itsm_callback.sh"
    }

    options {
        timeout(time: 20, unit: 'MINUTES')
        buildDiscarder(logRotator(numToKeepStr: '30'))
    }

    stages {
        stage('Confirm Rollback') {
            steps {
                script {
                    def version = params.ROLLBACK_VERSION ?: '(이전 빌드)'
                    echo """
╔══════════════════════════════════════════════╗
║              롤백 파이프라인 시작               ║
╠══════════════════════════════════════════════╣
║  대상 서버: ${params.TARGET_SERVER.padRight(30)}║
║  환경:      ${params.DEPLOY_ENV.padRight(30)}  ║
║  버전:      ${version.padRight(30)}             ║
║  사유:      ${params.ROLLBACK_REASON.take(30)} ║
╚══════════════════════════════════════════════╝
"""
                }
                sh "bash ${NOTIFY_SCRIPT} DEPLOYING '롤백 시작: ${params.ROLLBACK_REASON}'"
            }
        }

        stage('Resolve Rollback Artifact') {
            steps {
                script {
                    def jobName  = params.SOURCE_JOB ?: env.JOB_NAME.replaceAll('-rollback', '')
                    def buildNum = params.ROLLBACK_VERSION

                    echo "롤백 소스 Job: ${jobName}"
                    echo "롤백 버전: ${buildNum ?: '이전 빌드'}"

                    copyArtifacts(
                        projectName: jobName,
                        selector: buildNum
                            ? specific(buildNum)
                            : lastWithArtifacts(),
                        target: 'artifacts/',
                        flatten: true,
                        optional: false
                    )

                    sh "ls -la artifacts/"
                }
            }
        }

        stage('Rollback Deploy') {
            steps {
                withCredentials([sshUserPrivateKey(
                    credentialsId: "ssh-${params.TARGET_SERVER}",
                    keyFileVariable: 'SSH_KEY',
                    usernameVariable: 'SSH_USER'
                )]) {
                    sh """
                        ARTIFACT=\$(ls artifacts/*.jar artifacts/*.war artifacts/*.tar.gz 2>/dev/null | head -1)
                        echo "롤백 아티팩트: \${ARTIFACT}"
                        bash ${SCRIPTS_ROOT}/deploy.sh \
                            --server   "${params.TARGET_SERVER}" \
                            --env      "${params.DEPLOY_ENV}" \
                            --ssh-key  "\${SSH_KEY}" \
                            --ssh-user "\${SSH_USER}" \
                            --artifact "\${ARTIFACT}" \
                            --rollback true
                    """
                }
            }
        }

        stage('WAS Restart') {
            steps {
                withCredentials([sshUserPrivateKey(
                    credentialsId: "ssh-${params.TARGET_SERVER}",
                    keyFileVariable: 'SSH_KEY',
                    usernameVariable: 'SSH_USER'
                )]) {
                    sh """
                        bash ${SCRIPTS_ROOT}/was_restart.sh \
                            --server   "${params.TARGET_SERVER}" \
                            --ssh-key  "${SSH_KEY}" \
                            --ssh-user "${SSH_USER}" \
                            --was-type "${params.WAS_TYPE}"
                    """
                }
            }
        }

        stage('Health Check') {
            steps {
                retry(3) {
                    sh """
                        bash ${SCRIPTS_ROOT}/health_check.sh \
                            --url "${env.HEALTH_CHECK_URL ?: 'http://localhost:8080/health'}" \
                            --timeout 60
                    """
                }
            }
        }

        stage('ITSM Callback') {
            steps {
                sh """
                    bash ${NOTIFY_SCRIPT} ROLLED_BACK \
                        "롤백 완료: ${params.ROLLBACK_REASON} (버전 ${params.ROLLBACK_VERSION ?: '이전 빌드'})"
                """
            }
        }
    }

    post {
        always { cleanWs() }
        success {
            echo "✅ 롤백 완료: ${params.TARGET_SERVER} → 버전 ${params.ROLLBACK_VERSION ?: '이전 빌드'}"
        }
        failure {
            sh "bash ${NOTIFY_SCRIPT} FAILED '롤백 실패 — 즉시 수동 조치 필요' || true"
        }
    }
}