import { OpenApi } from "../OpenApi";

/**
 * Route information for migration.
 *
 * The `IHttpMigrateRoute` is a structure representing a route information for
 * OpenAPI generator libraries, which composes an RPC (Remote Procedure Call)
 * function from the {@link OpenApi.IOperation OpenAPI operation}.
 *
 * As the `IHttpMigrateRoute` has a lot of special stories, when you're
 * developing OpenAPI generator library, please read its description carefully
 * including the description of its properties.
 *
 * @author Jeongho Nam - https://github.com/samchon
 */
export interface IHttpMigrateRoute {
  /**
   * Method of the route.
   *
   * If the {@link OpenApi.IOperation.method} is not one of below type values,
   * the operation would be ignored in the migration process for the RPC (Remote
   * Procedure Call) function.
   */
  method: "head" | "get" | "post" | "put" | "patch" | "delete";

  /** Original path from the OpenAPI document. */
  path: string;

  /**
   * Emended path for OpenAPI generator libraries.
   *
   * The difference between {@link path} is:
   *
   * 1. Path parameters are replaced with `:param` format.
   * 2. Always starts with `/`.
   */
  emendedPath: string;

  /**
   * Accessor for the route.
   *
   * The `accessor` is a list of string values that are representing how to
   * access to the OpenAPI generated RPC (Remote Procedure Call) function
   * through namespace(s).
   *
   * The `accessor` is composed with the following rules. At first, namespaces
   * are composed by static directory names in the {@link path}. Parametric
   * symbols represented by `:param` or `{param}` cannot be a part of the
   * namespace.
   *
   * Instead, they would be a part of the function name. The function name is
   * composed with the {@link method HTTP method} and parametric symbols like
   * `getByParam` or `postByParam`. If there are multiple path parameters, they
   * would be concatenated by `And` like `getByParam1AndParam2`.
   *
   * For refefence, if the {@link operation}'s {@link method} is `delete`, the
   * function name would be replaced to `erase` instead of `delete`. It is the
   * reason why the `delete` is a reserved keyword in many programming
   * languages.
   *
   * - Example 1
   *
   *   - Path: `POST /shopping/sellers/sales`
   *   - Accessor: `shopping.sellers.sales.post`
   * - Example 2
   *
   *   - Endpoint: `GET
   *       /shoppings/sellers/sales/:saleId/reviews/:reviewId/comments/:id
   *   - Accessor:
   *       `shoppings.sellers.sales.reviews.getBySaleIdAndReviewIdAndCommentId`
   */
  accessor: string[];

  /**
   * List of path parameters.
   *
   * Note that, not a list of every parameters, but only path parameters.
   */
  parameters: IHttpMigrateRoute.IParameter[];

  /**
   * Metadata of headers.
   *
   * The `headers` property is a metadata of HTTP request headers for RPC
   * function, including the parameter variable name and schema.
   *
   * Also, its {@link IHttpMigrateRoute.IHeaders.schema} is always object or
   * reference to object. Even though the original
   * {@link OpenApi.IOperation OpenAPI operation}'s headers are separated to
   * atomic typed properties, the `headers` property forcibly combines them into
   * a single object type.
   *
   * For reference, if the `headers` property has been converted to an object
   * type forcibly, its property {@link IHttpMigrateRoute.IHeaders.name name} and
   * {@link IHttpMigrateRoute.IHeaders.key key} are always "headers".
   */
  headers: IHttpMigrateRoute.IHeaders | null;

  /**
   * Metadata of query values.
   *
   * The `query` property is a metadata of HTTP request query values for RPC
   * function, including the parameter variable name and schema.
   *
   * Also, its {@link IHttpMigrateRoute.IQuery.schema} is always object or
   * reference to object. Even though the original
   * {@link OpenApi.IOperation OpenAPI operation}'s query parameters are
   * separated to atomic typed properties, the `query` property forcibly
   * combines them into a single object type.
   *
   * For reference, if the `query` property has been converted to an object type
   * forcibly, its property {@link IHttpMigrateRoute.IQuery.name name} and
   * {@link IHttpMigrateRoute.IQuery.key key} are always "headers".
   */
  query: IHttpMigrateRoute.IQuery | null;

  /**
   * Metadata of request body.
   *
   * The `body` property is a metadata of HTTP request body for RPC function,
   * including the parameter variable name, content type, and schema.
   *
   * If the `body` property is `null`, it means the operation does not require
   * the request body data.
   */
  body: IHttpMigrateRoute.IBody | null;

  /**
   * Metadata of response body for success case.
   *
   * The `success` property is a metadata of HTTP response body for RPC
   * function, including content type, and schema when status code is `200` or
   * `201`.
   *
   * If the `success` property is `null`, it means the operation does not have
   * the response body data. In other words, the RPC function would return
   * `void`.
   */
  success: IHttpMigrateRoute.ISuccess | null;

  /**
   * Metadata of response body for exceptional status cases.
   *
   * The `exceptions` property is a metadata of HTTP response body for RPC
   * function, including content type, and schema when status code is not `200`
   * or `201`.
   *
   * The key of the `exceptions` property is the status code. It may be a
   * stringified number, but sometimes it could be a string like "default",
   * because the OpenAPI document allows the status code to be a string.
   */
  exceptions: Record<string, IHttpMigrateRoute.IException>;

  /**
   * Description comment for the route function.
   *
   * The `comment` is a function returning description comment for the RPC
   * function of OpenAPI generated. The comment is composed with the following
   * rules:
   *
   * 1. Starts from the {@link OpenApi.IOperation.summary} paragraph.
   * 2. The next paragraphs are filled with {@link OpenApi.IOperation.description}.
   * 3. Parameter descriptions are added with `@param` tag.
   * 4. Security requirements are added with `@security` tag.
   * 5. Tag names are added with `@tag` tag.
   * 6. If {@link OpenApi.IOperation.deprecated}, `@deprecated` tag is added.
   */
  comment: () => string;

  /**
   * Original operation from the OpenAPI document.
   *
   * The `operation` is a function returning the original
   * {@link OpenApi.IOperation} from the {@link OpenAPI} document.
   */
  operation: () => OpenApi.IOperation;
}
export namespace IHttpMigrateRoute {
  /** Metadata of path parameter. */
  export interface IParameter {
    /** Name of the path parameter. */
    name: string;

    /** Key of the path parameter. */
    key: string;

    /** Metadata of path parameter data type. */
    schema: OpenApi.IJsonSchema;

    /**
     * Original parameter info from the OpenAPI document.
     *
     * The `parameter` is a function returning the original
     * {@link OpenApi.IOperation.IParameter} from the {@link OpenAPI} document.
     */
    parameter: () => OpenApi.IOperation.IParameter;
  }

  /** Metadata of headers. */
  export interface IHeaders {
    /** Name of the headers parameter. */
    name: string;

    /** Key of the headers parameter. */
    key: string;

    /** Metadata of headers data type. */
    schema: OpenApi.IJsonSchema;
    title: () => string | undefined;
    description: () => string | undefined;
    example: () => any | undefined;
    examples: () => Record<string, any> | undefined;
  }

  /** Metadata of query values. */
  export interface IQuery {
    name: string;
    key: string;
    schema: OpenApi.IJsonSchema;
    title: () => string | undefined;
    description: () => string | undefined;
    example: () => any | undefined;
    examples: () => Record<string, any> | undefined;
  }

  /** Metadata of request body. */
  export interface IBody {
    /** Name of the body parameter. */
    name: string;

    /** Key of the body parameter. */
    key: string;

    /** Content type of the body. */
    type:
      | "text/plain"
      | "application/json"
      | "application/x-www-form-urlencoded"
      | "multipart/form-data";

    /** Metadata of response body data type. */
    schema: OpenApi.IJsonSchema;

    /** Description comment for the request/response body. */
    description: () => string | undefined;

    /** Media type of the request/response body. */
    media: () => OpenApi.IOperation.IMediaType;

    /** Whether the body is encrypted or not. */
    "x-nestia-encrypted"?: boolean;
  }

  /** Metadata of response body. */
  export interface ISuccess extends IBody {
    /** Status code of the response. */
    status: string;
  }

  /** Metadata of response body for exceptional status cases. */
  export interface IException {
    /** Metadata of response body data type. */
    schema: OpenApi.IJsonSchema;

    /** Description comment for the exception. */
    response: () => OpenApi.IOperation.IResponse;

    /** Media type of the response body. */
    media: () => OpenApi.IOperation.IMediaType;
  }
}