// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.

import { ServiceClientCredentials } from "../credentials/serviceClientCredentials";
import { HttpOperationResponse } from "../httpOperationResponse";
import { WebResource } from "../webResource";
import { BaseRequestPolicy, RequestPolicyFactory, RequestPolicy, RequestPolicyOptions } from "./requestPolicy";

export function signingPolicy(authenticationProvider: ServiceClientCredentials): RequestPolicyFactory {
  return {
    create: (nextPolicy: RequestPolicy, options: RequestPolicyOptions) => {
      return new SigningPolicy(nextPolicy, options, authenticationProvider);
    }
  };
}

export class SigningPolicy extends BaseRequestPolicy {

  constructor(nextPolicy: RequestPolicy, options: RequestPolicyOptions, public authenticationProvider: ServiceClientCredentials) {
    super(nextPolicy, options);
  }

  signRequest(request: WebResource): Promise<WebResource> {
    return this.authenticationProvider.signRequest(request);
  }

  public sendRequest(request: WebResource): Promise<HttpOperationResponse> {
    return this.signRequest(request).then(nextRequest => this._nextPolicy.sendRequest(nextRequest));
  }
}