import {Injectable} from '@angular/core';
import {Http, Response} from '@angular/http';
import {Observable}     from 'rxjs/Observable';
import {OpenaireProperties} from '../../../utils/properties/openaireProperties';
import 'rxjs/add/observable/of';
import 'rxjs/add/operator/do';
import 'rxjs/add/operator/share';
@Injectable()
export class SearchDataciteService {
  constructor(private http: Http ) {}

  searchDataciteResults (term: string, size : number, page : number):any {
    console.info("In search datacite results "+term);
    let url = OpenaireProperties.getSearchDataciteAPIURL()+'?query='+term+'&rows='+size+'&start='+(size*(page-1));
    let key = url;

    return this.http.get( (OpenaireProperties.isCacheEnabled())? (OpenaireProperties.getCacheUrl()+encodeURIComponent(url)): url)
                     .map(request => <any> request.json())
                     .do(items => console.info(items))
                     .do(items => console.log("Datacite Results: total results = "+items.meta.total+" keyword = "+term));
                     //.catch(this.handleError);
    }
    getDataciteResultByDOI (doi: string):any {
      console.info("Fetch datacite resultt by DOI: "+doi);
      let url = OpenaireProperties.getSearchDataciteAPIURL()+'/'+doi;
      let key = url;

      return this.http.get( (OpenaireProperties.isCacheEnabled())? (OpenaireProperties.getCacheUrl()+encodeURIComponent(url)): url)
                       .map(request => <any> request.json())
                       .do(items => console.info(items));
                      //  .do(items => console.log("Datacite Results: total results = "+items.meta.total+" doi = "+doi))

                       //.catch(this.handleError);
      }


  private handleError (error: Response) {
    // in a real world app, we may send the error to some remote logging infrastructure
    // instead of just logging it to the console
    console.log(error);
    return Observable.throw(error  || 'Server error');
  }
  private extractData(res: Response) {
    if (res.status < 200 || res.status >= 300) {
      throw new Error('Bad response status: ' + res.status);
    }
    let body = res.json();
    return body.data || { };
  }
}