import {Injectable} from '@angular/core';
import {HttpClient} from "@angular/common/http";
import {DeletedByInferenceResult} from '../../../utils/entities/deletedByInferenceResult';
import {EnvProperties} from '../../../utils/properties/env-properties';
import {ParsingFunctions} from '../parsingFunctions.class';
import {map} from "rxjs/operators";

@Injectable()
export class DeletedByInferenceService {
  private sizeOfDescription: number = 270;

  constructor(private http: HttpClient ) {
    this.parsingFunctions = new ParsingFunctions();
  }

  public parsingFunctions: ParsingFunctions;

  getDeletedByInferencePublications (id: string, properties:EnvProperties):any {
    let url = properties.searchAPIURLLAst + 'deletedByInferencePublications/' +id+"?format=json";
    let key = url;

    return this.http.get((properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
                //.map(res => <any> res.json())
                .pipe(map(res => res['result']['metadata']['oaf:entity']))
                .pipe(map(res => this.parseDeletedByInferencePublications(res, properties)));
  }

  parseDeletedByInferencePublications (result: any, properties: EnvProperties): DeletedByInferenceResult {
    /*title, authors, abstract, List of projects, PIDs,
      collectedfrom (link pointing to the download url), access rights*/

    //let publications: DeletedByInferenceResult[] = [];
    //if(results) {
      let publication : DeletedByInferenceResult;

      //let length = Array.isArray(results) ? results.length : 1;
      //for(let i=0; i<length; i++) {
        //var result = Array.isArray(results) ? results[i] : results;

        publication = new DeletedByInferenceResult();

        if(result) {
          if(result['oaf:result']) {
            let data = result['oaf:result'];

            var date:string = (data.dateofacceptance)+""; // transform to string in case it is an integer
            publication.date  = (date && (date).indexOf('-') !== -1)?date.split('-')[0]:date;
            publication.dateofacceptance = data.dateofacceptance;
            publication.embargoEndDate = data.embargoenddate;

            if(!Array.isArray(data.description)) {
                publication.description = data.description;
            } else {
                publication.description = data.description[0];
            }
            if(publication.description && publication.description.length > this.sizeOfDescription) {
                publication.description = publication.description.substring(0, this.sizeOfDescription) + "...";
            }

            if(data['bestaccessright'] && data['bestaccessright'].hasOwnProperty("classid")) {
              publication.accessMode = data['bestaccessright'].classid;
            }
          }

          if(result['oaf:result'] && result['oaf:result']['title']) {
            let title = result['oaf:result']['title'];

            if(Array.isArray(title)) {
              publication.title = title[0].content;
            } else {
              publication.title = title.content;
            }
          }

          if(result['oaf:result'] && result['oaf:result']['language']) {
            publication.languages = this.parsingFunctions.parseLanguages(result['oaf:result']['language']);
          }
          if(result['oaf:result'] && result['oaf:result']['country']) {
            publication.countries = this.parsingFunctions.parseCountries(result['oaf:result']['country']);
          }

          if(result['oaf:result'] && result['oaf:result']['rels'] && result['oaf:result']['rels']['rel']) {
            let relation;
            let length = Array.isArray(result['oaf:result']['rels']['rel']) ? result['oaf:result']['rels']['rel'].length : 1;

            for(let i=0; i<length; i++) {
              relation = Array.isArray(result['oaf:result']['rels']['rel']) ? result['oaf:result']['rels']['rel'][i] : result['oaf:result']['rels']['rel'];
              if(relation.hasOwnProperty("to")) {
                if(relation['to'].class == "isProducedBy") {
                  publication.fundedByProjects = this.parsingFunctions.parseFundingByProjects(publication.fundedByProjects, relation, publication.projectsProvenanceVocabulary);
                }
              }
            }
          }

          if(result['oaf:result'] && result['oaf:result']['children']) {
            let children = result['oaf:result']['children'];

            if(children.hasOwnProperty("instance")) {
              publication.types = new Array<string>();
              let types = new Set<string>();

              publication.hostedBy_collectedFrom = new Array<{"downloadName": string, "downloadUrl": string[], "collectedName": string, "collectedId": string, "accessMode": string[], "bestAccessMode": string, "type": string, "year":string}>();

              let counter = 0;
              let instance;

              let length = Array.isArray(children['instance']) ? children['instance'].length : 1;

              for(let i=0; i<length; i++) {
                instance = Array.isArray(children['instance']) ? children['instance'][i] : children['instance'];

                this.parsingFunctions.parseTypes(publication.types, types, instance);

                if(instance.hasOwnProperty("webresource")) {
                  let url;
                  if(!Array.isArray(instance['webresource'])) {
                    url = instance['webresource'].url;
                  } else{
                    url = instance['webresource'][0].url;
                  }

                  if(instance.hasOwnProperty("hostedby")) {
                    counter = this.parsingFunctions.parseHostedBy_collectedFrom(publication.hostedBy_collectedFrom, instance, result['oaf:result'], url, counter, publication.accessMode);
                  }
                }
              }
            }
          }

          if(result['oaf:result'] && result['oaf:result']['pid']) {
            publication.identifiers = this.parsingFunctions.parseIdentifiers(result['oaf:result']['pid']);
          }

          if(result['oaf:result'] && result['oaf:result']['creator']) {
            if(publication.authors == undefined) {
              publication.authors = new Array<{"fullName": string, "orcid": string}>();
            }

            let authors = result['oaf:result']['creator'];
            let length = Array.isArray(authors) ? authors.length : 1;

            for(let i=0; i<length; i++) {
              let author = Array.isArray(authors) ? authors[i] : authors;
              if(author) {
                /*if (author.ORCID && author.ORCID.indexOf(properties.orcidURL) != -1) {
                  author.ORCID = author.ORCID.substr(properties.orcidURL.length);
                }*/
                publication['authors'][author.rank] = {"fullName": author.content, "orcid": author.ORCID};
              }
            }
            publication.authors = publication.authors.filter(function (item) {
              return (item != undefined && item.fullName != undefined);
            });
          }

        //}
        //publications.push(publication);
      //}
    }

    return publication;
  }
}