---
AWSTemplateFormatVersion: '2010-09-09'
Description: Handel-created Aurora RDS instance

Parameters:
  DBUsername:
    NoEcho: true
    Description: The username of the database
    Type: String
  DBPassword:
    NoEcho: true
    Description: The password of the database
    Type: String

Resources:
  ClusterParameterGroup:
    Type: AWS::RDS::DBClusterParameterGroup
    Properties:
      Description: {{description}}
      Family: {{parameterGroupFamily}}
      Parameters:
      {{#if clusterParameters}}
        {{#each clusterParameters}}
        {{@key}}: '{{this}}'
        {{/each}}
      {{else}}
        # If no params specified, use a single param set to the default so CF won't throw an error
        {{#if isMySQL}}
        server_audit_logging: 0
        {{else}}
        autovacuum_naptime: 5
        {{/if}}
      {{/if}}
      Tags:
      {{#if tags}}
      {{#each tags}}
      - Key: {{@key}}
        Value: {{this}}
      {{/each}}
      {{/if}}
      - Key: Name
        Value: {{dbName}}

  InstanceParameterGroup:
    Type: AWS::RDS::DBParameterGroup
    Properties:
      Description: {{description}}
      Family: {{parameterGroupFamily}}
      {{#if instanceParameters}}
      Parameters:
        {{#each instanceParameters}}
        {{@key}}: '{{this}}'
        {{/each}}
      {{/if}}
      Tags:
      {{#if tags}}
      {{#each tags}}
      - Key: {{@key}}
        Value: {{this}}
      {{/each}}
      {{/if}}
      - Key: Name
        Value: {{dbName}}

  Cluster:
    Type: AWS::RDS::DBCluster
    Properties:
      MasterUsername: !Ref DBUsername
      MasterUserPassword: !Ref DBPassword
      DatabaseName: {{databaseName}}
      DBClusterIdentifier: {{dbName}}
      DBClusterParameterGroupName: !Ref ClusterParameterGroup
      DBSubnetGroupName:  {{dbSubnetGroup}}
      Engine: {{engine}}
      EngineVersion: {{engineVersion}}
      Port: {{port}}
      Tags:
      {{#if tags}}
      {{#each tags}}
      - Key: {{@key}}
        Value: {{this}}
      {{/each}}
      {{/if}}
      - Key: Name
        Value: {{dbName}}
      VpcSecurityGroupIds:
      - {{dbSecurityGroupId}}

  {{#each instances}}
  DatabaseInstance{{@index}}:
    Type: AWS::RDS::DBInstance
    Properties:
      AllowMajorVersionUpgrade: true
      AutoMinorVersionUpgrade: true
      DBClusterIdentifier: !Ref Cluster
      DBInstanceClass: {{instanceType}}
      DBInstanceIdentifier: {{../dbName}}-{{@index}}
      DBParameterGroupName: !Ref InstanceParameterGroup
      DBSubnetGroupName: {{../dbSubnetGroup}}
      Engine: {{../engine}}
      PubliclyAccessible: false # TODO - This won't work when deploying DBs in public subnets?
      Tags:
      {{#if ../tags}}
      {{#each ../tags}}
      - Key: {{@key}}
        Value: {{this}}
      {{/each}}
      {{/if}}
      - Key: Name
        Value: {{../dbName}}

  {{/each}}

Outputs:
  ClusterEndpoint:
    Description: The connection endpoint of the Aurora cluster
    Value: !GetAtt Cluster.Endpoint.Address
  ClusterPort:
    Description: The port of the Aurora cluster
    Value: !GetAtt Cluster.Endpoint.Port
  ClusterReadEndpoint:
    Description: The read endpoint for the Aurora cluster
    Value: !GetAtt Cluster.ReadEndpoint.Address
  DatabaseName:
    Description: The name of the database
    Value: {{databaseName}}