// Copyright 2022 Luca Casonato. All rights reserved. MIT license.
/**
 * Firebase ML API Client for Deno
 * ===============================
 * 
 * Access custom machine learning models hosted via Firebase ML.
 * 
 * Docs: https://firebase.google.com
 * Source: https://googleapis.deno.dev/v1/firebaseml:v1.ts
 */

import { auth, CredentialsClient, GoogleAuth, request } from "/_/base@v1/mod.ts";
export { auth, GoogleAuth };
export type { CredentialsClient };

/**
 * Access custom machine learning models hosted via Firebase ML.
 */
export class FirebaseML {
  #client: CredentialsClient | undefined;
  #baseUrl: string;

  constructor(client?: CredentialsClient, baseUrl: string = "https://firebaseml.googleapis.com/") {
    this.#client = client;
    this.#baseUrl = baseUrl;
  }

  /**
   * Starts asynchronous cancellation on a long-running operation. The server
   * makes a best effort to cancel the operation, but success is not guaranteed.
   * If the server doesn't support this method, it returns
   * `google.rpc.Code.UNIMPLEMENTED`. Clients can use Operations.GetOperation or
   * other methods to check whether the cancellation succeeded or whether the
   * operation completed despite cancellation. On successful cancellation, the
   * operation is not deleted; instead, it becomes an operation with an
   * Operation.error value with a google.rpc.Status.code of `1`, corresponding
   * to `Code.CANCELLED`.
   *
   * @param name The name of the operation resource to be cancelled.
   */
  async operationsCancel(name: string, req: CancelOperationRequest): Promise<Empty> {
    const url = new URL(`${this.#baseUrl}v1/${ name }:cancel`);
    const body = JSON.stringify(req);
    const data = await request(url.href, {
      client: this.#client,
      method: "POST",
      body,
    });
    return data as Empty;
  }

  /**
   * Deletes a long-running operation. This method indicates that the client is
   * no longer interested in the operation result. It does not cancel the
   * operation. If the server doesn't support this method, it returns
   * `google.rpc.Code.UNIMPLEMENTED`.
   *
   * @param name The name of the operation resource to be deleted.
   */
  async operationsDelete(name: string): Promise<Empty> {
    const url = new URL(`${this.#baseUrl}v1/${ name }`);
    const data = await request(url.href, {
      client: this.#client,
      method: "DELETE",
    });
    return data as Empty;
  }

  /**
   * Lists operations that match the specified filter in the request. If the
   * server doesn't support this method, it returns `UNIMPLEMENTED`.
   *
   * @param name The name of the operation's parent resource.
   */
  async operationsList(name: string, opts: OperationsListOptions = {}): Promise<ListOperationsResponse> {
    const url = new URL(`${this.#baseUrl}v1/${ name }`);
    if (opts.filter !== undefined) {
      url.searchParams.append("filter", String(opts.filter));
    }
    if (opts.pageSize !== undefined) {
      url.searchParams.append("pageSize", String(opts.pageSize));
    }
    if (opts.pageToken !== undefined) {
      url.searchParams.append("pageToken", String(opts.pageToken));
    }
    const data = await request(url.href, {
      client: this.#client,
      method: "GET",
    });
    return data as ListOperationsResponse;
  }
}

/**
 * The request message for Operations.CancelOperation.
 */
export interface CancelOperationRequest {
}

/**
 * A generic empty message that you can re-use to avoid defining duplicated
 * empty messages in your APIs. A typical example is to use it as the request or
 * the response type of an API method. For instance: service Foo { rpc
 * Bar(google.protobuf.Empty) returns (google.protobuf.Empty); }
 */
export interface Empty {
}

/**
 * The response message for Operations.ListOperations.
 */
export interface ListOperationsResponse {
  /**
   * The standard List next-page token.
   */
  nextPageToken?: string;
  /**
   * A list of operations that matches the specified filter in the request.
   */
  operations?: Operation[];
}

/**
 * This is returned in the longrunning operations for create/update.
 */
export interface ModelOperationMetadata {
  basicOperationStatus?:  | "BASIC_OPERATION_STATUS_UNSPECIFIED" | "BASIC_OPERATION_STATUS_UPLOADING" | "BASIC_OPERATION_STATUS_VERIFYING";
  /**
   * The name of the model we are creating/updating The name must have the form
   * `projects/{project_id}/models/{model_id}`
   */
  name?: string;
}

/**
 * This resource represents a long-running operation that is the result of a
 * network API call.
 */
export interface Operation {
  /**
   * If the value is `false`, it means the operation is still in progress. If
   * `true`, the operation is completed, and either `error` or `response` is
   * available.
   */
  done?: boolean;
  /**
   * The error result of the operation in case of failure or cancellation.
   */
  error?: Status;
  /**
   * Service-specific metadata associated with the operation. It typically
   * contains progress information and common metadata such as create time. Some
   * services might not provide such metadata. Any method that returns a
   * long-running operation should document the metadata type, if any.
   */
  metadata?: {
    [key: string]: any
  };
  /**
   * The server-assigned name, which is only unique within the same service
   * that originally returns it. If you use the default HTTP mapping, the `name`
   * should be a resource name ending with `operations/{unique_id}`.
   */
  name?: string;
  /**
   * The normal, successful response of the operation. If the original method
   * returns no data on success, such as `Delete`, the response is
   * `google.protobuf.Empty`. If the original method is standard
   * `Get`/`Create`/`Update`, the response should be the resource. For other
   * methods, the response should have the type `XxxResponse`, where `Xxx` is
   * the original method name. For example, if the original method name is
   * `TakeSnapshot()`, the inferred response type is `TakeSnapshotResponse`.
   */
  response?: {
    [key: string]: any
  };
}

/**
 * Additional options for FirebaseML#operationsList.
 */
export interface OperationsListOptions {
  /**
   * The standard list filter.
   */
  filter?: string;
  /**
   * The standard list page size.
   */
  pageSize?: number;
  /**
   * The standard list page token.
   */
  pageToken?: string;
}

/**
 * The `Status` type defines a logical error model that is suitable for
 * different programming environments, including REST APIs and RPC APIs. It is
 * used by [gRPC](https://github.com/grpc). Each `Status` message contains three
 * pieces of data: error code, error message, and error details. You can find
 * out more about this error model and how to work with it in the [API Design
 * Guide](https://cloud.google.com/apis/design/errors).
 */
export interface Status {
  /**
   * The status code, which should be an enum value of google.rpc.Code.
   */
  code?: number;
  /**
   * A list of messages that carry the error details. There is a common set of
   * message types for APIs to use.
   */
  details?: {
    [key: string]: any
  }[];
  /**
   * A developer-facing error message, which should be in English. Any
   * user-facing error message should be localized and sent in the
   * google.rpc.Status.details field, or localized by the client.
   */
  message?: string;
}