def cicdproject = "${CICD_NAMESPACE}"
def appname = "${APP_NAME}"
def utv_project = "${UTV_NAMESPACE}"
def acc_project = "${ACC_NAMESPACE}"
def prod_project = "${PROD_NAMESPACE}"
def jenkinsslave = "nodejs15-agent"
def dist_path = "dist/apps/mina-sidor-fa"

def utilities
def REGISTRY = 'nexus.arbetsformedlingen.se:5555'
def PROJECT_CONTAINING_IMAGES = "app-af-nexus"
def USE_CONFIG_MAP = false
def CONFIG_MAP_KEY = "${appname}-config"
def CONFIG_MAP_PATH = "./openshift/config-maps/${prod_project}.yaml"

pipeline {

  agent {
      node {label "${jenkinsslave}"}
  }

  environment {
      CURRENT_COMMIT = getShortCommitHash()
      BUILD_TAG = ""
  }

  stages {

    stage("Initialize") {
      steps {
        echo '### Generating build tag... ###'
        script {
          def rootDir = pwd()
          echo "Current Directory: \"${ rootDir }\""
          utilities = load "${ rootDir }/openshift/libs/utilities.groovy"

          def packageJson = readJSON file: 'package.json'
          BUILD_TAG = "prod_v${packageJson.version}_${env.BUILD_NUMBER}_${CURRENT_COMMIT}"
          echo '### Build tag ###'
          echo "${BUILD_TAG}"
        }
        echo '### Build tag generated! ###'
      }
    }

    stage("Install dependencies") {
      environment {
        NEXUS_CREDS = "${env.NEXUS_USERNAME}:${env.NEXUS_PASSWORD}"
      }
      steps {
        echo '### Installing dependencies... ###'
        sh '''
          ENCODED=$(echo -n "${NEXUS_CREDS}" | openssl base64)
          CACHE_DIRECTORY=/home/jenkins/.npm/cache
          mkdir -p ${CACHE_DIRECTORY}
          echo "_auth=${ENCODED}" >> .npmrc

          # set -x
          cat .npmrc

          # Pull from cache if it exists
          (
            # Fail if any step fail
            set -e
            # Remove line 3 from package-lock, which contain the package.json version. Store backup.
            # We only care about dependencies, not the version
            sed -i.bak -e '3d' package-lock.json
            # Hash the package-lock.json file
            sha1sum package-lock.json | tr -s " " | awk '{print $1}' > hashed.pkg-lock
            # Restore package-lock.json with version number intact
            mv package-lock.json.bak package-lock.json
            # Try to get the file from cache
            cp ${CACHE_DIRECTORY}/$(cat hashed.pkg-lock) node_modules.tar.gz 2> /dev/null
            # Check if we found the cached node_modules
            test -f node_modules.tar.gz
            # If we found the cached node_modules, extract the files to node_modules
            (test -f node_modules.tar.gz && tar -zxf node_modules.tar.gz && echo "Using cached node_modules from ${CACHE_DIRECTORY}/$(cat hashed.pkg-lock)") || echo "No cached node_modules.tar.gz found"
            # Echo to the logs stating that we are using cache
            echo "Using cached node_modules from ${CACHE_DIRECTORY}/$(cat hashed.pkg-lock)"
          ) || true

          # If we did not find the cached node_modules, install from the lock
            test -f node_modules.tar.gz || npm ci;

          # Store cache
          (
            # Fail if any step fail
            set -e
            # Only update the cache if we found no previous cache
            test ! -f node_modules.tar.gz
            # Tar the cache
            tar -zcf node_modules.tar.gz node_modules
            # Clean old cache
            rm -rf ${CACHE_DIRECTORY}/*
            # Store the cache
            cp node_modules.tar.gz ${CACHE_DIRECTORY}/$(cat hashed.pkg-lock)
          ) || true
        '''
        echo '### Dependencies installed! ###'
      }
    }

    stage("Build application") {
      environment {
        NGINX_PATH = "${dist_path}/."
        BUILD_TAG = "${BUILD_TAG}"
      }
      steps {
        echo '### Building application... ###'
        sh '''
          npm run build:prod -- --version ${BUILD_TAG}
          cp -r nginx/* ${NGINX_PATH}
        '''
        echo '### Application built! ###'
      }
    }

    stage('App bake') {
      steps {
        echo '### Creating image... ###'
        script {
          openshift.withCluster() {
            openshift.withProject(utv_project) {
              openshift.selector("bc", "${ appname }").startBuild("--from-dir=${dist_path}", "--wait=true")
              openshift.tag("${ appname }:latest", "${ appname }:${BUILD_TAG}")
            }
          }
        }

        echo '### Image created! ###'
      }
    }

    stage('Push image to External registry') {
      agent {
        label 'skopeo-agent'
      }
      steps {
        echo '### Publishing image to external registry... ###'
        script {
          def branchName = GIT_BRANCH.split('/')[1]
          openshift.withCluster() {
            openshift.withProject(cicdproject) {
              def registry = "nexus.arbetsformedlingen.se:5555"
              withCredentials([usernamePassword(credentialsId: "${openshift.project()}-nexus-secret", usernameVariable: "REG_USER", passwordVariable: "REG_PWD")]) {
                sh "skopeo copy docker://docker-registry.default.svc:5000/${utv_project}/${appname}:${BUILD_TAG} docker://${registry}/app-af-nexus/${appname}:${BUILD_TAG} --src-creds jenkins:\$(oc whoami -t) --dest-creds \"$REG_USER:$REG_PWD\" --src-tls-verify=false --dest-tls-verify=false --format v2s2"
              }
            }
          }
        }
        echo '### Image published to external registry! ###'
      }
    }

    stage('Deploy to production') {
      steps {
        echo '### Trying to deploy to prod... ###'
        script {
          openshift.withCluster() {
            utilities.defineAuth()
          }

          openshift.withCluster( env.API, env.TOKEN ) {
            openshift.withProject(prod_project) {
              // Wait for approval
              timeout(time:24, unit:'HOURS') { // changed from 1440
                input message: "Go Live with ${ appname } in Production?", ok: "Confirm"
                def label = "${BUILD_TAG}"
                utilities.rollout("${ appname }", "${ appname }", "${BUILD_TAG}", label, PROJECT_CONTAINING_IMAGES, REGISTRY, USE_CONFIG_MAP, "${ CONFIG_MAP_KEY }", CONFIG_MAP_PATH)
              }
            }
          }
        }
      }
    }

  }
}

def getShortCommitHash() {
  return sh(returnStdout: true, script: "git log -n 1 --pretty=format:'%h'").trim()
}