pipeline {
  agent {
    label 'master'
  }
  stages {
    stage('Pre-Build Stage') {
      steps {
        withCredentials([[ $class: 'AmazonWebServicesCredentialsBinding', credentialsId: 'e4e458ba-8178-4cc7-af47-cbd9046e76ce', accessKeyVariable: 'AWS_ACCESS_KEY_ID', secretKeyVariable: 'AWS_SECRET_ACCESS_KEY']]) {
          sh '''
          echo "Setting Environment Variables Stage"
          export AWS_REGION=${JENKINS_AWS_REGION}
          aws configure set region ${AWS_REGION}
          export ACCOUNT_ID=$(aws sts get-caller-identity --output text --query Account)
          ecrRepo=$(aws cloudformation --region ${AWS_REGION} describe-stack-resources --stack-name CdkStackALBEksBg | jq \'.StackResources[]|select(.ResourceType == "AWS::ECR::Repository").PhysicalResourceId\' | tr -d \'"\')
          preEcrRepo="${ACCOUNT_ID}.dkr.ecr.${AWS_REGION}.amazonaws.com/"
          export ECR_REPO_URI=$preEcrRepo$ecrRepo
          echo $ECR_REPO_URI
          export kubectlcmd=$(aws cloudformation --region ${AWS_REGION} describe-stacks --stack-name CdkStackALBEksBg | jq \'.Stacks[].Outputs[1].OutputValue\' | tr -d \'"\')
          kubeClusterName=$(aws cloudformation --region ${AWS_REGION} describe-stacks --stack-name CdkStackALBEksBg | jq \'.Stacks[].Outputs[0].OutputValue\' | tr -d \'"\')
          export CLUSTER_NAME=$kubeClusterName
          export ECR_REPO_URI=$ECR_REPO_URI
          CODEBUILD_RESOLVED_SOURCE_VERSION=01234abcdefgh
          export TAG=${CODEBUILD_RESOLVED_SOURCE_VERSION}

          set > ~/.vars
          cat ~/.vars
          '''
        }
      }
    }

    stage ('Build & Containerize Stage') {
      steps {
        withCredentials([[ $class: 'AmazonWebServicesCredentialsBinding', credentialsId: 'e4e458ba-8178-4cc7-af47-cbd9046e76ce', accessKeyVariable: 'AWS_ACCESS_KEY_ID', secretKeyVariable: 'AWS_SECRET_ACCESS_KEY']]) {
          sh label: '', script: '''echo "==================="
          echo "Build Stage"
          echo "==================="

          echo "++++++++++++++++"
          source ~/.vars
          eval $kubectlcmd
          aws configure set region ${AWS_REGION}
          echo "++++++++++++++++"


          pwd
          ls -al
          cd amazon-eks-cicd-codebuild-eks-alb-bg/flask-docker-app
          $(aws ecr get-login --no-include-email)
          docker build -t $ECR_REPO_URI:$TAG .
          docker push $ECR_REPO_URI:$TAG
          '''
        }
      }
    }

    stage ('Deploy to Green Env Stage') {
      steps {
        withCredentials([[ $class: 'AmazonWebServicesCredentialsBinding', credentialsId: 'e4e458ba-8178-4cc7-af47-cbd9046e76ce', accessKeyVariable: 'AWS_ACCESS_KEY_ID', secretKeyVariable: 'AWS_SECRET_ACCESS_KEY']]) {
          sh label: '', script: '''echo "==================="
          echo "Post-Build Stage"
          echo "==================="

          echo "++++++++++++++++"
          source ~/.vars
          eval $kubectlcmd
          aws configure set region ${AWS_REGION}
          echo "++++++++++++++++"

          kubectl get nodes -n flask-alb
          kubectl get deploy -n flask-alb
          kubectl get svc -n flask-alb
          isDeployed=$(kubectl get deploy -n flask-alb -o json | jq \'.items[0]\')
          deploy8080=$(kubectl get svc -n flask-alb -o wide | grep 8080: | tr \' \' \'\\n\' | grep app= | sed \'s/app=//g\')

          if [[ \\"$isDeployed\\" == \\"null\\" ]]; then kubectl apply -f k8s/flaskALBBlue.yaml && kubectl apply -f k8s/flaskALBGreen.yaml; else kubectl set image deployment/$deploy8080 -n flask-alb flask=$ECR_REPO_URI:$TAG; fi

          kubectl get deploy -n flask-alb
          kubectl get svc -n flask-alb
          '''
        }
      }
    }

    stage ('Approval & Swap Blue/Green Env Stage') {
      input {
        message "Do you want to proceed for production deployment?"
      }
      steps {
        withCredentials([[ $class: 'AmazonWebServicesCredentialsBinding', credentialsId: 'e4e458ba-8178-4cc7-af47-cbd9046e76ce', accessKeyVariable: 'AWS_ACCESS_KEY_ID', secretKeyVariable: 'AWS_SECRET_ACCESS_KEY']]) {
          sh label: '', script: '''echo "==================="
          echo "Swap Stage"
          echo "==================="

          echo "++++++++++++++++"
          source ~/.vars
          eval $kubectlcmd
          aws configure set region ${AWS_REGION}
          echo "++++++++++++++++"

          kubectl get nodes -n flask-alb
          kubectl get deploy -n flask-alb
          kubectl get svc -n flask-alb
          deploy8080=$(kubectl get svc -n flask-alb -o wide | grep ' 8080:' | tr ' ' '\n' | grep app= | sed 's/app=//g')
          deploy80=$(kubectl get svc -n flask-alb -o wide | grep ' 80:' | tr ' ' '\n' | grep app= | sed 's/app=//g')
          echo $deploy80 $deploy8080
          kubectl patch svc flask-svc-alb-blue -n flask-alb -p '{\"spec\":{\"selector\": {\"app\": \"'$deploy8080'\"}}}'
          kubectl patch svc flask-svc-alb-green -n flask-alb -p '{\"spec\":{\"selector\": {\"app\": \"'$deploy80'\"}}}'
          kubectl get deploy -n flask-alb
          kubectl get svc -n flask-alb
          '''
        }
      }
    }

  }
}