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// Copyright 2021 Goldman Sachs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import meta::external::format::shared::binding::*;
import meta::pure::functions::io::http::*;
import meta::external::store::service::metamodel::*;

Class meta::external::store::service::metamodel::ServiceStore extends meta::pure::store::set::SetBasedStore
{
   description     : String[0..1];
   securitySchemes : Map[1];
   elements        : ServiceStoreElement[*];

   getServiceStoreElementById(id:String[1]) {
      $this.elements->filter(e | $e.id == $id)->toOne()
   }: ServiceStoreElement[1];
}

Class <> meta::external::store::service::metamodel::ServiceStoreElement
{
   owner    : ServiceStore[1];
   parent   : ServiceGroup[0..1];

   id       : String[1];
   path     : String[1];

   resolveFullPathRecursively() {
      if($this.parent->isEmpty(),
         |$this.path,
         |$this.parent->toOne().resolveFullPathRecursively() + $this.path)
   }: String[1];
}

Class meta::external::store::service::metamodel::ServiceGroup extends ServiceStoreElement
{
   elements : ServiceStoreElement[*];

   getServiceStoreElementById(id:String[1]) {
      $this.elements->filter(e | $e.id == $id)->toOne()
   }: ServiceStoreElement[1];
}

Class meta::external::store::service::metamodel::Service extends ServiceStoreElement
[
   supportedMethodTypes
   (
      ~function: $this.method->in(supportedServiceMethods())
      ~enforcementLevel: Error
      ~message: 'Unsuported Service Method Type. Supported Types are - ' + supportedServiceMethods()->map(m | $m->toString())->joinStrings('[', ', ',']')
   )
]
{
   requestBody : TypeReference[0..1];
   method      : HTTPMethod[1];
   parameters  : ServiceParameter[*];
   response    : ComplexTypeReference[1];
   security    : SecuritySchemeRequirement[*];
}

function meta::external::store::service::metamodel::supportedServiceMethods():HTTPMethod[*]
{
   [HTTPMethod.GET, HTTPMethod.POST]
}

Class meta::external::store::service::metamodel::ServiceParameter
{
   name                 : String[1];
   type                 : TypeReference[1];
   location             : Location[1];

   allowReserved        : Boolean[0..1];
   required             : Boolean[0..1];
   enum                 : Enumeration[0..1];
   serializationFormat  : SerializationFormat[0..1];
}

Enum meta::external::store::service::metamodel::Location
{
   PATH,
   QUERY,
   HEADER
}

Class <> meta::external::store::service::metamodel::TypeReference
{
  list     : Boolean[1];
}

Class meta::external::store::service::metamodel::StringTypeReference extends meta::external::store::service::metamodel::TypeReference
{
}

Class meta::external::store::service::metamodel::BooleanTypeReference extends meta::external::store::service::metamodel::TypeReference
{
}

Class meta::external::store::service::metamodel::IntegerTypeReference extends meta::external::store::service::metamodel::TypeReference
{
}

Class meta::external::store::service::metamodel::FloatTypeReference extends meta::external::store::service::metamodel::TypeReference
{
}

Class meta::external::store::service::metamodel::ComplexTypeReference extends meta::external::store::service::metamodel::TypeReference
{
   type    : Class[1];
   binding : Binding[1];
}

Class <> meta::external::store::service::metamodel::SecurityScheme
{
}

Class meta::external::store::service::metamodel::HttpSecurityScheme extends meta::external::store::service::metamodel::SecurityScheme
{
  scheme       : Scheme[1];
  bearerFormat : String[0..1];
}

Enum meta::external::store::service::metamodel::Scheme
{
    BASIC,
    BEARER
}

Class meta::external::store::service::metamodel::ApiKeySecurityScheme extends meta::external::store::service::metamodel::SecurityScheme
{
  location : ApiKeyLocation[1];
  keyName  : String[1];
}

Enum meta::external::store::service::metamodel::ApiKeyLocation
{
   COOKIE,
   HEADER,
   QUERY
}

Class meta::external::store::service::metamodel::SerializationFormat
{
   style   : String[0..1];
   explode : Boolean[0..1];
}

Class <> meta::external::store::service::metamodel::SecuritySchemeRequirement
{
}

Class meta::external::store::service::metamodel::SingleSecuritySchemeRequirement extends meta::external::store::service::metamodel::SecuritySchemeRequirement
{
    id               : String[1];
    securityScheme   : SecurityScheme[1];
}

Class meta::external::store::service::metamodel::MultiSecuritySchemeRequirement extends meta::external::store::service::metamodel::SecuritySchemeRequirement
{
    securitySchemes  : SingleSecuritySchemeRequirement[*];
}