AWSTemplateFormatVersion: "2010-09-09"
Transform: AWS::Serverless-2016-10-31
Description: A simple stack to showcase X-Ray integration.

Globals:
  Api:
    TracingEnabled: true

Resources:
  ApiRole:
    Type: AWS::IAM::Role
    Properties:
      Policies:
        - PolicyName: DynamoDBAccess
          PolicyDocument:
            Statement:
              - Effect: Allow
                Action:
                  - dynamodb:GetItem
                  - dynamodb:PutItem
                Resource:
                  - !Sub "arn:${AWS::Partition}:dynamodb:${AWS::Region}:${AWS::AccountId}:table/${Table}"
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:
              Service:
                - apigateway.amazonaws.com
            Action:
              - sts:AssumeRole

  ServerlessRestApi:
    Type: AWS::Serverless::Api
    Properties:
      Name: !Ref AWS::StackName
      StageName: Prod
      DefinitionBody:
        openapi: "3.0.0"
        paths:
          "/{name}":
            get:
              summary: Get an item by name
              parameters:
                - name: name
                  in: path
                  required: true
                  type: string
              responses:
                "200":
                  description: 200 status response
                "400":
                  description: 400 status response
                "500":
                  description: 500 status response
              x-amazon-apigateway-integration:
                httpMethod: POST
                type: AWS
                passthroughBehavior: NEVER
                uri: !Sub "arn:${AWS::Partition}:apigateway:${AWS::Region}:dynamodb:action/GetItem"
                credentials: !GetAtt ApiRole.Arn
                requestTemplates:
                  application/json:
                    Fn::Sub: >
                      {
                        "TableName": "${Table}",
                        "Key": {
                          "id": {
                            "S": "$input.params('name')"
                          }
                        }
                      }
                responses:
                  "4\\d{2}":
                    statusCode: 400
                    responseTemplates:
                      application/json: >
                        {
                          "message": $input.json('$.message')
                        }
                  "5\\d{2}":
                    statusCode: 500
                    responseTemplates:
                      application/json: >
                        {
                          "message": $input.json('$.message')
                        }
                  default:
                    statusCode: 200
                    responseTemplates:
                      application/json: >
                        $util.parseJson($input.json('$.Item.content.S'))
            put:
              summary: Put an item by name
              parameters:
                - name: name
                  in: path
                  required: true
                  type: string
              responses:
                "200":
                  description: 200 status response
                "400":
                  description: 400 status response
                "500":
                  description: 500 status response
              x-amazon-apigateway-integration:
                httpMethod: POST
                type: AWS
                passthroughBehavior: NEVER
                uri: !Sub "arn:${AWS::Partition}:apigateway:${AWS::Region}:dynamodb:action/PutItem"
                credentials: !GetAtt ApiRole.Arn
                requestTemplates:
                  application/json:
                    Fn::Sub: >
                      {
                        "TableName": "${Table}",
                        "Item": {
                          "id": {
                            "S": "$input.params('name')"
                          },
                          "content": {
                            "S": "$util.escapeJavaScript($input.body)"
                          }
                        }
                      }
                responses:
                  "4\\d{2}":
                    statusCode: 400
                    responseTemplates:
                      application/json: >
                        {
                          "message": $input.json('$.message')
                        }
                  "5\\d{2}":
                    statusCode: 500
                    responseTemplates:
                      application/json: >
                        {
                          "message": $input.json('$.message')
                        }
                  default:
                    statusCode: 200
                    responseTemplates:
                      application/json: >
                        {
                          "message": "Success"
                        }

  Table:
    Type: AWS::Serverless::SimpleTable

Outputs:
  ApiUrl:
    Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod"