---
AWSTemplateFormatVersion: "2010-09-09"
Parameters:
  toCluster:
    Type: String
    Default: 'yes'
  optionalCluster:
    Type: String
    Default: 'yes'
Conditions:
  isCluster: !Equals [!Ref 'toCluster', 'yes']
  IsTesting: !Equals [!Ref 'AWS::Region', 'us-east-1']
  IsOptionalCluster: !Equals [!Ref 'optionalCluster', 'yes']
Resources:
  MyParameterGroup:
    Type: AWS::ElastiCache::ParameterGroup
    Properties:
      Description: "MyNewParameterGroup"
      CacheParameterGroupFamily: redis3.2
      Properties:
        cas_disabled: "1"
        cluster-enabled: !If [isCluster, 'yes', !Ref 'AWS::NoValue']
  MyClusterParameterGroup:
    Type: AWS::ElastiCache::ParameterGroup
    Properties:
      Description: "MyNewParameterGroup"
      CacheParameterGroupFamily: redis3.2
      Properties:
        cas_disabled: "1"
        cluster-enabled: 'yes'
  MyNonClusterParameterGroup:
    Type: AWS::ElastiCache::ParameterGroup
    Properties:
      Description: "MyNewParameterGroup"
      CacheParameterGroupFamily: "memcached1.4"
      Properties:
        cas_disabled: "1"
        cluster-enabled: 'no'
  MyOptionalClusterParameterGroup:
    Type: AWS::ElastiCache::ParameterGroup
    Condition: IsOptionalCluster
    Properties:
      Description: "MyOptionalParameterGroup"
      CacheParameterGroupFamily: "memcached1.4"
      Properties:
        cas_disabled: "1"
        cluster-enabled: 'no'
  BasicReplicationGroup:
    Type: AWS::ElastiCache::ReplicationGroup
    Properties:
      AutomaticFailoverEnabled: !If [isCluster, true, false]
      AutoMinorVersionUpgrade: true
      CacheParameterGroupName: !If [isCluster, !Ref MyClusterParameterGroup, !Ref MyParameterGroup]
      CacheNodeType: cache.r3.large
      CacheSubnetGroupName: subnetgroup
      Engine: redis
      EngineVersion: '3.2'
      NumNodeGroups: 2
      ReplicasPerNodeGroup: 3
      Port: 6379
      PreferredMaintenanceWindow: sun:05:00-sun:09:00
      ReplicationGroupDescription: A sample replication group
      SecurityGroupIds:
      - sg-12345abc
      SnapshotRetentionLimit: 5
      SnapshotWindow: 10:00-12:00
  SecondReplicationGroup:
    Type: AWS::ElastiCache::ReplicationGroup
    Properties:
      AutomaticFailoverEnabled: !If [isCluster, true, false]
      AutoMinorVersionUpgrade: true
      CacheParameterGroupName: !If [isCluster, !Ref MyClusterParameterGroup, !Ref MyParameterGroup]
      CacheNodeType: cache.r3.large
      CacheSubnetGroupName: subnetgroup
      Engine: redis
      EngineVersion: '3.2'
      NumNodeGroups: 1
      NumCacheClusters: 2
      ReplicasPerNodeGroup: 3
      Port: 6379
      PreferredMaintenanceWindow: sun:05:00-sun:09:00
      ReplicationGroupDescription: A sample replication group
      SecurityGroupIds:
      - sg-12345abc
      SnapshotRetentionLimit: 5
      SnapshotWindow: 10:00-12:00
  ThirdReplicationGroup:
    Type: AWS::ElastiCache::ReplicationGroup
    Properties:
      AutoMinorVersionUpgrade: true
      CacheParameterGroupName: !Ref MyClusterParameterGroup  # Don't fail when missing
      CacheNodeType: cache.r3.large
      CacheSubnetGroupName: subnetgroup
      Engine: redis
      EngineVersion: '3.2'
      NumNodeGroups: 2
      NumCacheClusters: 2
      ReplicasPerNodeGroup: 3
      Port: 6379
      PreferredMaintenanceWindow: sun:05:00-sun:09:00
      ReplicationGroupDescription: A sample replication group
      SecurityGroupIds:
      - sg-12345abc
      SnapshotRetentionLimit: 5
      SnapshotWindow: 10:00-12:00
  FourthReplicationGroup:
    Type: "AWS::ElastiCache::ReplicationGroup"
    Properties:
      AtRestEncryptionEnabled: true
      AutomaticFailoverEnabled: true
      CacheNodeType: cache.r3.large
      CacheParameterGroupName: !Ref "MyClusterParameterGroup"
      CacheSubnetGroupName: subnetGroup
      Engine: "redis"
      EngineVersion: "4.0.10"
      NumNodeGroups: !If [IsTesting, 1, 3]  # No Error when NumNodeGroups specified
      ReplicasPerNodeGroup: 1
      PreferredMaintenanceWindow: "Mon:04:00-Mon:06:00"
      ReplicationGroupDescription: test
      SecurityGroupIds:
      - sg-test
  FifthReplicationGroup:
    Type: "AWS::ElastiCache::ReplicationGroup"
    Condition: IsOptionalCluster
    Properties:
      AtRestEncryptionEnabled: true
      AutomaticFailoverEnabled: true
      CacheNodeType: cache.r3.large
      CacheParameterGroupName: !Ref "MyOptionalClusterParameterGroup"
      CacheSubnetGroupName: subnetGroup
      Engine: "redis"
      EngineVersion: "4.0.10"
      NumNodeGroups: 1
      ReplicasPerNodeGroup: 1
      PreferredMaintenanceWindow: "Mon:04:00-Mon:06:00"
      ReplicationGroupDescription: test
      SecurityGroupIds:
      - sg-test
  SixthReplicationGroup:
    Type: "AWS::ElastiCache::ReplicationGroup"
    Condition: IsOptionalCluster
    Properties:
      AtRestEncryptionEnabled: true
      AutomaticFailoverEnabled: true
      CacheNodeType: cache.r3.large
      CacheParameterGroupName: !Ref "MyNonClusterParameterGroup"
      CacheSubnetGroupName: subnetGroup
      Engine: "redis"
      EngineVersion: "4.0.10"
      NumNodeGroups: 1
      ReplicasPerNodeGroup: 1
      PreferredMaintenanceWindow: "Mon:04:00-Mon:06:00"
      ReplicationGroupDescription: test
      SecurityGroupIds:
      - sg-test