---
AWSTemplateFormatVersion: "2010-09-09"
Description: Dynamodb tables for Calorie tracker application

Parameters:
  APIName:
    Type: String
    Description: "Name of the API, to generate names for resources"
    MinLength: 3
    MaxLength: 20
    AllowedPattern: '^[a-zA-Z][a-zA-Z0-9_]*$'

Resources:
  DynamoDBUserTable:
    Type: "AWS::DynamoDB::Table"
    Description: "Data store for User information"
    Properties:
      TableName: !Sub ${APIName}_user_table
      AttributeDefinitions:
        - AttributeName: "id"
          AttributeType: "S"
      KeySchema:
        - AttributeName: "id"
          KeyType: "HASH"
      ProvisionedThroughput:
        ReadCapacityUnits: 5
        WriteCapacityUnits: 5
  DynamoDBActivityTable:
    Type: "AWS::DynamoDB::Table"
    Description: "Data store for User activities"
    Properties:
      TableName: !Sub ${APIName}_activity_table
      AttributeDefinitions:
        - AttributeName: "id"
          AttributeType: "S"
        - AttributeName: "userid"
          AttributeType: "S"
        - AttributeName: "creationDateTime"
          AttributeType: "S"
      KeySchema:
        - AttributeName: "id"
          KeyType: "HASH"
      GlobalSecondaryIndexes:
        - IndexName: "userid-creationDateTime-index"
          KeySchema:
            -
              AttributeName: "userid"
              KeyType: "HASH"
            -
              AttributeName: "creationDateTime"
              KeyType: "RANGE"
          Projection:
            ProjectionType: "ALL"
          ProvisionedThroughput:
            ReadCapacityUnits: "5"
            WriteCapacityUnits: "5"
      ProvisionedThroughput:
        ReadCapacityUnits: 5
        WriteCapacityUnits: 5
      StreamSpecification:
        StreamViewType: "NEW_IMAGE"
  DynamoDBActivityCategoryTable:
    Type: "AWS::DynamoDB::Table"
    Description: "Data store for activity categories and its types"
    Properties:
      TableName: !Sub ${APIName}_activity_category_table
      AttributeDefinitions:
        - AttributeName: "category"
          AttributeType: "S"
      KeySchema:
        - AttributeName: "category"
          KeyType: "HASH"
      ProvisionedThroughput:
        ReadCapacityUnits: 5
        WriteCapacityUnits: 5
  DynamoDBUserCaloriesAggregateTable:
    Type: "AWS::DynamoDB::Table"
    Description: "Data store for User calories aggregate per day"
    Properties:
      TableName: !Sub ${APIName}_user_aggregate_table
      AttributeDefinitions:
        - AttributeName: "userid"
          AttributeType: "S"
        - AttributeName: "date"
          AttributeType: "S"
      KeySchema:
        - AttributeName: "userid"
          KeyType: "HASH"
        - AttributeName: "date"
          KeyType: "RANGE"
      ProvisionedThroughput:
        ReadCapacityUnits: 5
        WriteCapacityUnits: 5

  AppsyncRole:
    Type: 'AWS::IAM::Role'
    Properties:
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:
              Service:
                - appsync.amazonaws.com
            Action:
              - 'sts:AssumeRole'
      Path: /service-role/
      RoleName: appsync-ddb-datasource
      Policies:
        - PolicyDocument:
            Statement:
              - Action:
                  - dynamodb:GetItem
                  - dynamodb:PutItem
                  - dynamodb:DeleteItem
                  - dynamodb:UpdateItem
                  - dynamodb:Query
                  - dynamodb:Scan
                Effect: Allow
                Resource:
                  - !Join ['', [ !GetAtt 'DynamoDBUserTable.Arn' ]]
                  - !Join ['', [ !GetAtt 'DynamoDBUserTable.Arn', '/*' ]]
                  - !Join ['', [ !GetAtt 'DynamoDBActivityTable.Arn' ]]
                  - !Join ['', [ !GetAtt 'DynamoDBActivityTable.Arn', '/*' ]]
                  - !Join ['', [ !GetAtt 'DynamoDBActivityCategoryTable.Arn' ]]
                  - !Join ['', [ !GetAtt 'DynamoDBActivityCategoryTable.Arn', '/*' ]]
                  - !Join ['', [ !GetAtt 'DynamoDBUserCaloriesAggregateTable.Arn' ]]
                  - !Join ['', [ !GetAtt 'DynamoDBUserCaloriesAggregateTable.Arn', '/*' ]]                                                     
            Version: '2012-10-17'
          PolicyName: appsync-dynamodb-ds

Outputs:
  UserTable:
    Value: !Ref DynamoDBUserTable
    Description: "User table name"
  UserTableArn:
    Value: !GetAtt 'DynamoDBUserTable.Arn'
    Description: "User table ARN"
  ActivityTable:
    Value: !Ref DynamoDBActivityTable
    Description: "Activity table name"
  ActivityTableArn:
    Value: !GetAtt 'DynamoDBActivityTable.Arn'
    Description: "Activity table ARN"
  ActivityTableStreamARN:
    Value: !GetAtt 'DynamoDBActivityTable.StreamArn'
    Description: "Activity table stream ARN"
  ActivityCategoryTable:
    Value: !Ref DynamoDBActivityCategoryTable
    Description: "Activity category table name"
  ActivityCategoryTableArn:
    Value: !GetAtt 'DynamoDBActivityCategoryTable.Arn'
    Description: "Activity category table ARN"
  UserCaloriesAggregateTable:
    Value: !Ref DynamoDBUserCaloriesAggregateTable
    Description: "User calories aggregate table name"
  UserCaloriesAggregateTableArn:
    Value: !GetAtt 'DynamoDBUserCaloriesAggregateTable.Arn'
    Description: "User calories aggregate table ARN"