import {
  RegistryMetadatafieldsSuccessResponse,
  RestResponse
} from '../cache/response.models';
import { DSpaceRESTV2Response } from '../dspace-rest-v2/dspace-rest-v2-response.model';
import { RestRequest } from './request.models';
import { ResponseParsingService } from './parsing.service';
import { DSpaceRESTv2Serializer } from '../dspace-rest-v2/dspace-rest-v2.serializer';
import { DSOResponseParsingService } from './dso-response-parsing.service';
import { Injectable } from '@angular/core';
import { RegistryMetadatafieldsResponse } from '../registry/registry-metadatafields-response.model';
import { hasValue } from '../../shared/empty.util';

@Injectable()
export class RegistryMetadatafieldsResponseParsingService implements ResponseParsingService {
  constructor(private dsoParser: DSOResponseParsingService) {
  }

  parse(request: RestRequest, data: DSpaceRESTV2Response): RestResponse {
    const payload = data.payload;

    let metadatafields = [];

    if (hasValue(payload._embedded)) {
      metadatafields = payload._embedded.metadatafields;
      metadatafields.forEach((field) => {
        field.schema = field._embedded.schema;
      });
    }

    payload.metadatafields = metadatafields;

    const deserialized = new DSpaceRESTv2Serializer(RegistryMetadatafieldsResponse).deserialize(payload);
    return new RegistryMetadatafieldsSuccessResponse(deserialized, data.statusCode, data.statusText, this.dsoParser.processPageInfo(data.payload));
  }

}