#!/usr/bin/env groovy

pipeline {
    agent any
    tools {
        maven 'Maven'
    }
    stages {
        stage('increment version') {
            steps {
                script {
                    echo 'incrementing app version...'
                    sh 'mvn build-helper:parse-version versions:set \
                        -DnewVersion=\\\${parsedVersion.majorVersion}.\\\${parsedVersion.minorVersion}.\\\${parsedVersion.nextIncrementalVersion} \
                        versions:commit'
                    def matcher = readFile('pom.xml') =~ '<version>(.+)</version>'
                    def version = matcher[0][1]
                    env.IMAGE_NAME = "$version-$BUILD_NUMBER"
                }
            }
        }
        stage('build app') {
            steps {
                script {
                    echo "building the application..."
                    sh 'mvn clean package'
                }
            }
        }
        stage('build image') {
            steps {
                script {
                    echo "building the docker image..."
                    withCredentials([usernamePassword(credentialsId: 'docker-hub', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
                        sh "docker build -t nanajanashia/demo-app:${IMAGE_NAME} ."
                        sh "echo $PASS | docker login -u $USER --password-stdin"
                        sh "docker push nanajanashia/demo-app:${IMAGE_NAME}"
                    }
                }
            }
        }
        stage('deploy') {
            steps {
                script {
                    withKubeConfig([credentialsId: 'k8s-credentials', serverUrl: 'https://7293fae4-4c9d-4629-bc82-262d0a2b8e3c.eu-central-2.linodelke.net']) {
                        withCredentials([usernamePassword(credentialsId: 'docker-hub', passwordVariable: 'PASS', usernameVariable: 'USER')]) {
                            sh "kubectl create secret docker-registry my-registry-key --docker-server=docker.io --docker-username=$USER --docker-password=$PASS"
                        }
                        sh 'envsubst < kubernetes/deployment.yaml | kubectl apply -f -'
                    }
                }
            }
        }
    }
}