pipeline {
    agent any

    environment {
        // Automatically detect registry and image name based on repo
        REGISTRY = "myharbor.local:80"
        APP_NAME = "eCommerce-backend" // Change this per repo (backend, web, admin)
        IMAGE_TAG = "${REGISTRY}/library/${APP_NAME}:${env.BRANCH_NAME}-${env.BUILD_NUMBER}"
        NAMESPACE = "ecommerce"
    }

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

        stage('Build Image') {
            steps {
                script {
                    // DOCKER_BUILDKIT=0 forces the use of the legacy builder
                    sh "DOCKER_BUILDKIT=0 docker build -t ${IMAGE_TAG} ."
                    sh "DOCKER_BUILDKIT=0 docker tag ${IMAGE_TAG} ${APP_NAME}:latest"
                }
            }
        }

        stage('Push to Harbor') {
            steps {
                script {
                    // Log in and push (uses the port 80 bypass we set up)
                    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 {
                    // Since we are bypassing Harbor pull in K8s for now:
                    // Export from Docker and Import to Containerd k8s namespace
                    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')]) {
                        // Update the deployment image
                        // We use --patch to update the image without needing the full YAML
                        sh """
                        kubectl --kubeconfig=${KUBECONFIG} patch deployment ${APP_NAME} -n ${NAMESPACE} --patch \
                        '{"spec": {"template": {"spec": {"containers": [{"name": "${APP_NAME}", "image": "${IMAGE_TAG}", "imagePullPolicy": "Never"}]}}}}'
                        """
                        
                        // Verify deployment
                        sh "kubectl --kubeconfig=${KUBECONFIG} rollout status deployment/${APP_NAME} -n ${NAMESPACE}"
                    }
                }
            }
        }
    }

    post {
        always {
            // Clean up old images to save disk space
            sh "docker rmi ${IMAGE_TAG} || true"
        }
    }
}