AWSTemplateFormatVersion: '2010-09-09'
Description: Jenkins ECS Service
Parameters:
  #------------------------
  # Deployment Information
  #------------------------
  environment:
    Type: String
    Description: Name of the environment to use in naming.
    Default: production
  release:
    Type: String
    Description: Name of the release name of the stack version to use.
    Default: production
    AllowedValues: ['develop', 'production']
    ConstraintDescription: "Must be a possible release version."
  VpcId:
    Description: ID of the VPC
    Type: AWS::EC2::VPC::Id

  #-------------------
  # ECS Configuration
  #-------------------
  EcsCluster:
    Type: String
    Description: The cluster to run the Jenkins service on.
  
  #-----------------
  # Load Balancing 
  #-----------------
  PublicSubnets:
    Description: The public subnets for the ALB to run in.
    Type: String
  PortalCertificate:
    Description: Arn of AWS Certificate
    Type: String

  #-----
  # DNS
  #-----
  Domain:
    Type: String
    Description: The domain to create the endpoint on (Must have an existing hosted zone ex. `example.com`) Leave blank to skip DNS.
    Default: ""
  SubDomain:
    Type: String
    Description: The subdomain to be used by jenkins. (ex. `jenkins.example.com`)
    Default: jenkins

  #------------
  # CloudWatch
  #------------
  LogGroup:
    Type: String
    Description: The AWS CloudWatch log group to output logs to.
    Default: "/ecs/jenkins"

Conditions:
  CreateDns: !Not [!Equals [!Ref Domain, ""]]

Resources:

  #-----
  # DNS
  #-----
  DnsRecords:
    Condition: CreateDns
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub 'https://s3.us-east-1.amazonaws.com/sumu-stacks/jenkins/${release}/cloudformation/jenkins/dns.yaml'
      Parameters:
        environment: !Ref environment
        Domain: !Ref Domain
        SubDomain: !Ref SubDomain
        JenkinsDns: !GetAtt LoadBalancing.Outputs.PublicAlbDnsName

  #-----------------
  # Load Balancing 
  #-----------------
  LoadBalancing:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub 'https://s3.us-east-1.amazonaws.com/sumu-stacks/jenkins/${release}/cloudformation/jenkins/load_balancing.yaml'
      Parameters:
        environment: !Ref environment
        release: !Ref release
        VpcId: !Ref VpcId
        PublicSubnets: !Join [",", !Split [" ", !Ref PublicSubnets]]
        PortalCertificate: !Ref PortalCertificate

  #-------------------
  # ECS Task & Service
  #-------------------
  TaskDefinition:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: !Sub 'https://s3.us-east-1.amazonaws.com/sumu-stacks/jenkins/${release}/cloudformation/jenkins/task.yaml'
      Parameters:
        LogGroupName: !Ref LogGroup


  EcsService:
    DependsOn: LoadBalancing
    Type: AWS::ECS::Service
    Properties:
      Cluster: !Ref EcsCluster
      DesiredCount: 1
      TaskDefinition: !GetAtt TaskDefinition.Outputs.TaskArn
      LoadBalancers:  
        - ContainerName: jenkins
          ContainerPort: 8080
          TargetGroupArn: !GetAtt LoadBalancing.Outputs.AdminPortalTargetGroup