pipeline {
    agent any
    environment {
        CONTAINER_REGISTRY = credentials("container_registry")
        REGISTRY_NAMESPACE = credentials("registry_namespace")
        REPO_NAME = env.GIT_URL.replaceFirst(/^.*\/([^\/]+?).git$/, '$1')
    }
    stages {
        stage("Build") {
            when { tag "*" }
            steps {
                script {
                    def architectures = ["aarch64", "x86_64"]
                    def parallelStages = [:]
                    
                    for (arch in architectures) {
                        def nodeLabel = arch
                        
                        parallelStages[arch] = {
                            node(nodeLabel) {
                                checkout scm

                                sh "podman build -t ${CONTAINER_REGISTRY}/${REGISTRY_NAMESPACE}/${REPO_NAME}:${env.BRANCH_NAME}-${nodeLabel}-${env.BUILD_NUMBER} ."
                                sh "podman save -o ${nodeLabel}-${env.BUILD_NUMBER}.tar ${CONTAINER_REGISTRY}/${REGISTRY_NAMESPACE}/${REPO_NAME}:${env.BRANCH_NAME}-${nodeLabel}-${env.BUILD_NUMBER}"
                                stash includes: "${nodeLabel}-${env.BUILD_NUMBER}.tar", name: "${nodeLabel}-image"
                            }
                        }
                    }
                    
                    parallel parallelStages

                    env.ARCHITECTURES = architectures.join(',')
                }
            }
        }
        stage("Combine and Push") {
            when { tag "*" }
            agent any
            steps {
                def architectures = env.ARCHITECTURES.split(',')

                for (arch in architectures) {
                    unstash "${arch}-image"
                    sh "podman load -i ${arch}-${env.BUILD_NUMBER}.tar"
                }

                def manifestImages = architectures.collect { arch ->
                        return "${CONTAINER_REGISTRY}/${REGISTRY_NAMESPACE}/${REPO_NAME}:${env.BRANCH_NAME}-${arch}-${env.BUILD_NUMBER}"
                    }.join(' ')

                sh '''
                    podman manifest rm ${CONTAINER_REGISTRY}/${REGISTRY_NAMESPACE}/${REPO_NAME}:${BRANCH_NAME} || true
                    podman manifest create ${CONTAINER_REGISTRY}/${REGISTRY_NAMESPACE}/${REPO_NAME}:${BRANCH_NAME} ${manifestImages}
                '''

                withCredentials([usernamePassword(credentialsId: "dockerhub", usernameVariable: "REG_USERNAME", passwordVariable: "REG_PASSWORD")]) {
                    sh '''
                        podman login ${CONTAINER_REGISTRY} -u ${REG_USERNAME} -p ${REG_PASSWORD}
                        podman manifest push ${CONTAINER_REGISTRY}/${REGISTRY_NAMESPACE}/${REPO_NAME}:${BRANCH_NAME} \
                            docker://${CONTAINER_REGISTRY}/${REGISTRY_NAMESPACE}/${REPO_NAME}:${BRANCH_NAME}
                    '''
                }
            }
        }
    }
}