pipeline {
    agent any

    environment {
        REGISTRY = "myharbor.local:80"
        APP_NAME = "ecommerce-app" 
        IMAGE_NAME = "ecommerce-backend"
        IMAGE_TAG = "${REGISTRY}/library/${IMAGE_NAME}:${env.BRANCH_NAME}-${env.BUILD_NUMBER}"
        NAMESPACE = "ecommerce"
    }

    stages {
        stage('Checkout') {
            steps {
                checkout scm
            }
        }

        stage('Build Image') {
            steps {
                script {
                    // Ensure the buildkit socket directory exists and is writable
                    sh "mkdir -p /run/buildkit && chmod 777 /run/buildkit"
                    
                    // Start buildkitd if it is not already running
                    sh """
                    if ! pgrep buildkitd > /dev/null; then
                        echo "Starting buildkitd daemon..."
                        # Start as root via sudo since it needs to manage network/mounts
                        nohup buildkitd --addr unix:///run/buildkit/buildkitd.sock > /tmp/buildkitd.log 2>&1 &
                        sleep 10
                    fi
                    """
                    
                    // Run the build using the aliased docker (nerdctl) command
                    sh "docker build -t ${IMAGE_TAG} ."
                }
            }
        }

        stage('Push to Harbor') {
            steps {
                script {
                    withCredentials([usernamePassword(credentialsId: 'harbor-creds', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
                        sh "docker login ${REGISTRY} -u ${USER} -p ${PASS}"
                        sh "docker push ${IMAGE_TAG}"
                    }
                }
            }
        }

        stage('Inject to K8s Cache') {
            steps {
                script {
                    // Force the image into the local containerd store
                    sh "docker save ${IMAGE_TAG} | sudo ctr -n k8s.io images import -"
                }
            }
        }

        stage('Deploy to K8s') {
            steps {
                script {
                    withCredentials([file(credentialsId: 'k8s-config', variable: 'KUBECONFIG')]) {
                        sh """
                        kubectl --kubeconfig=${KUBECONFIG} patch deployment ${APP_NAME} -n ${NAMESPACE} --patch \
                        '{"spec": {"template": {"spec": {"containers": [{"name": "${APP_NAME}", "image": "${IMAGE_TAG}", "imagePullPolicy": "Never"}]}}}}'
                        """
                        sh "kubectl --kubeconfig=${KUBECONFIG} rollout status deployment/${APP_NAME} -n ${NAMESPACE}"
                    }
                }
            }
        }
    }

    post {
        always {
            // Cleanup to save space on the agent
            sh "docker rmi ${IMAGE_TAG} || true"
        }
    }
}