import { Injectable } from '@angular/core';
import { Http, Response, Headers, RequestOptions } from '@angular/http';
import { Observable } from 'rxjs/Rx';

import { ResultInfo } from './results/resultInfo';

@Injectable()
export class CommunityService {

    private sizeOfDescription: number = 135;

    constructor(private http:Http) {
      }

    getNumberOfPublications() {
        return this.http.get('http://beta.services.openaire.eu:8480/search/rest/v2/api/publications/count?format=json&fq=communityid=egi')
                        .map(res => <any> res.json()).map(res => res.total).do(res => {console.log(res)});
    }

    getNumberOfResearchData() {
        return this.http.get('http://beta.services.openaire.eu:8480/search/rest/v2/api/datasets/count?format=json&fq=communityid=egi')
                        .map(res => <any> res.json()).map(res => res.total).do(res => {console.log(res)});
    }

    getNumberOfSoftware() {
        return this.http.get('http://beta.services.openaire.eu:8480/search/rest/v2/api/software/count?format=json&fq=communityid=egi')
                        .map(res => <any> res.json()).map(res => res.total).do(res => {console.log(res)});
    }

    getResults(url: string) {
        return this.http.get(url).map(res => <any> res.json()).map(res => this.parseResults(res['results']));
    }

    parseResults(data: any): ResultInfo[] {
        let results: ResultInfo[] = [];

        let length = Array.isArray(data) ? data.length :1;

        for (let i=0; i<length; i++) {
            let resData = Array.isArray(data) ? data[i]['result']['metadata']['oaf:entity']['oaf:result'] : data['result']['metadata']['oaf:entity']['oaf:result'];

            var result: ResultInfo = new ResultInfo();


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

            result['id'] = Array.isArray(data) ? data[i]['result']['header']['dri:objIdentifier'] : data['result']['header']['dri:objIdentifier'];

            if(resData['bestaccessright'].hasOwnProperty("classid")) {
                result['accessRights'] = resData['bestaccessright'].classid;
            }

            if(resData['resulttype'].hasOwnProperty("classid")) {
                result['type'] = resData['resulttype'].classid;
            }

            if(resData.hasOwnProperty("creator") && resData['creator'] != null) {
                if(result['authors'] == undefined) {
                  result['authors'] = new Array<string>();
                }

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

                for(let i=0; i<length; i++) {
                  let author = Array.isArray(authors) ? authors[i] : authors;
                  result.authors[author.rank-1] = author.content;
                }

                result.authors = result.authors.filter(function (item) {
                  return (item != undefined);
                });
            }

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

            if(!Array.isArray(resData.description)) {
                result.description = resData.description;
            } else {
                result.description = resData.description[0];
            }

            if(result.description.length > this.sizeOfDescription) {
              result.description = result.description.substring(0, this.sizeOfDescription) + "...";
            }

            results.push(result);
        }
        return results;
    }

}