import { Injectable } from '@nestjs/common';
import { AbstractActionHandler, AwsProperties, Format } from '../abstract-action.handler';
import { Action } from '../action.enum';
import * as Joi from 'joi';
import { KmsService } from './kms.service';
import { NotFoundException } from '../aws-shared-entities/aws-exceptions';

type QueryParams = {
  GrantTokens?: string[];
  KeyId: string;
}

@Injectable()
export class DescribeKeyHandler extends AbstractActionHandler<QueryParams> {

  constructor(
    private readonly kmsService: KmsService,
  ) {
    super();
  }

  format = Format.Json;
  action = Action.KmsDescribeKey;
  validator = Joi.object<QueryParams, true>({ 
    KeyId: Joi.string().required(),
    GrantTokens: Joi.array().items(Joi.string()),
  });

  protected async handle({ KeyId }: QueryParams, awsProperties: AwsProperties) {

    const keyRecord = await this.kmsService.findOneByRef(KeyId, awsProperties);

    if (!keyRecord) {
      throw new NotFoundException();
    }

    return {
      KeyMetadata: keyRecord.metadata,
    }
  }
}