# This is the SAM template that represents the architecture of your serverless application
# https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-template-basics.html

# https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md

# The AWSTemplateFormatVersion identifies the capabilities of the template
# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/format-version-structure.html
AWSTemplateFormatVersion: 2010-09-09
Description: >-
  sam-app

# Transform section specifies one or more macros that AWS CloudFormation uses to process your template
# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/transform-section-structure.html
Transform:
- AWS::Serverless-2016-10-31

Parameters:
  ProjectName:
    Type: String

  Stage:
    Type: String

Conditions:
  CreateProdResources: !Equals [!Ref Stage, Prod]

# Read more about Global variables here!!
# https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#globals-section
Globals:
  Function:
    Tracing: Active
    MemorySize: 1024
    Timeout: 60
    Runtime: nodejs14.x
    # Read more about Deployment Preferences and Safe Deployments here!!
    # https://github.com/awslabs/serverless-application-model/blob/master/docs/safe_lambda_deployments.rst
    AutoPublishAlias: live
    DeploymentPreference:
      Enabled: true
      Type: !If [CreateProdResources, Canary10Percent5Minutes, AllAtOnce]
    Environment:
      Variables:
        # Enable usage of KeepAlive to reduce overhead of short-lived actions, like DynamoDB queries
        AWS_NODEJS_CONNECTION_REUSE_ENABLED: 1
  Api:
    OpenApiVersion: 3.0.1
    TracingEnabled: true
    Cors:
      AllowMethods: "'OPTIONS,POST,GET'"
      AllowHeaders: "'Content-Type,X-Amz-Date,Authorization,X-Api-Key,X-Amz-Security-Token'"
      AllowOrigin: "'*'"

# Resources declares the AWS resources that you want to include in the stack
# https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/resources-section-structure.html
Resources:
  Api:
    Type: AWS::Serverless::Api
    Properties:
      Name: !Sub ${ProjectName}-${Stage}
      StageName: !Sub ${Stage}
      # AccessLogSetting:
      #   - DestinationArn: !Sub "arn:aws:logs:${AWS::Region}:${AWS::AccountId}:log-group/custom_log_group_name"
      #     Format: "$context.identity.sourceIp $context.identity.caller $context.identity.user [$context.requestTime] "$context.httpMethod $context.resourcePath $context.protocol" $context.status $context.responseLength $context.requestId"
      MethodSettings:
        - MetricsEnabled: True
          ResourcePath: '/*'
          HttpMethod: '*'
          #ThrottlingRateLimit: 100
          #ThrottlingBurstLimit: 50

  # Each Lambda function is defined by properties:
  # https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction

  # This is a Lambda function config associated with the source code: get-all-items.js
  getAllItemsFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./ # Defined where package.json file must reside for "sam build" to complete
      Handler: src/items/get-all-items/index.getAllItemsHandler
      Description: A simple example includes a HTTP get method to get all items from a DynamoDB table.
      Policies:
        # Give Create/Read/Update/Delete Permissions to the SampleTable
        - DynamoDBCrudPolicy:
            TableName: !Ref SampleTable
      Environment:
        Variables:
          # Make table name accessible as environment variable from function code during execution
          SAMPLE_TABLE: !Ref SampleTable
      Events:
        Api:
          Type: Api
          Properties:
            RestApiId: !Ref Api
            Path: /items
            Method: GET

  getByIdFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./
      Handler: src/items/get-by-id/index.getByIdHandler
      Description: A simple example includes a HTTP get method to get one item by id from a DynamoDB table.
      Policies:
        - DynamoDBCrudPolicy:
            TableName: !Ref SampleTable
      Environment:
        Variables:
          SAMPLE_TABLE: !Ref SampleTable
      Events:
        Api:
          Type: Api
          Properties:
            RestApiId: !Ref Api
            Path: /items/{id}
            Method: GET


  putItemFunction:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: ./
      Handler: src/items/put-item/index.putItemHandler
      Description: A simple example includes a HTTP post method to add one item to a DynamoDB table.
      Policies:
        - DynamoDBCrudPolicy:
            TableName: !Ref SampleTable
      Environment:
        Variables:
          SAMPLE_TABLE: !Ref SampleTable
      Events:
        Api:
          Type: Api
          Properties:
            RestApiId: !Ref Api
            Path: /items
            Method: POST
            
  SampleTable:
    Type: AWS::DynamoDB::Table
    Properties: 
      BillingMode: PAY_PER_REQUEST
      AttributeDefinitions: 
        - AttributeName: id
          AttributeType: S
      KeySchema: 
        - AttributeName: id
          KeyType: HASH
      TableName: !Sub sampleTable-${ProjectName}-${Stage}

Outputs:
  ApiUrl:
    Description: "API Gateway endpoint URL for ${Stage} stage"
    Value: !Sub "https://${Api}.execute-api.${AWS::Region}.amazonaws.com/${Stage}/"

  SampleTable:
    Value: !GetAtt SampleTable.Arn
    Description: Sample Data Table ARN