openapi: 3.0.3
info:
  title: idempotency-apigw
  version: 1.0.0
paths:
  /orders:
    post:
      description: Create new order
      requestBody:
        content:
          application/json:
            schema:
              $ref: "#/components/schemas/OrderRequest"
      responses:
        "201":
          description: OK
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/SuccessfulResponse"
      x-amazon-apigateway-integration:
          responses:
            default:
              statusCode: "201"
          uri:
            Fn::Sub: arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${OrderFunction.Arn}/invocations
          passthroughBehavior: "when_no_match"
          httpMethod: "POST"
          contentHandling: "CONVERT_TO_TEXT"
          type: "aws_proxy"
components:
  schemas:
    OrderRequest:
      type: object
      properties:
        requestToken:
          type: string
        userId:
          type: string
        items:
          type: array
          items:
            $ref: "#/components/schemas/OrderItem"
          minItems: 1
        comment:
          type: string
      required:
        - userId
        - items
    OrderItem:
      type: object
      properties:
        productId:
          type: string
        price:
          type: number
          minimum: 0
          exclusiveMinimum: true
        quantity:
          type: integer
          minimum: 1
      required:
        - productId
        - price
        - quantity
    SuccessfulResponse:
      type: object
      properties:
        orderId:
          type: string
x-amazon-apigateway-request-validator: all
x-amazon-apigateway-request-validators:
  all:
    validateRequestBody: true
    validateRequestParameters: true
x-amazon-apigateway-gateway-responses:
  BAD_REQUEST_BODY:
    statusCode: 400
    responseTemplates:
      application/json: '{"error":"$context.error.validationErrorString"}'