import {Injectable} from '@angular/core';
import {HttpClient, HttpErrorResponse} from "@angular/common/http";
import {throwError} from 'rxjs';
import {ResultLandingInfo} from '../../utils/entities/resultLandingInfo';
import {EnvProperties} from '../../utils/properties/env-properties';
import {ParsingFunctions} from '../landing-utils/parsingFunctions.class';
import {map} from "rxjs/operators";
import {HostedByCollectedFrom, Organization} from "../../utils/result-preview/result-preview";
import {Dates, Identifier, StringUtils} from "../../utils/string-utils.class";
import {properties} from "../../../../environments/environment";

@Injectable()
export class ResultLandingService {

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

  public parsingFunctions: ParsingFunctions;
  resultLandingInfo: ResultLandingInfo;

  private buildResultLandingInfoUrl(id: string, identifier: Identifier, type: string): string {
    if (id) {
      let url = properties.searchAPIURLLAst;
      if (type === 'publication') {
        url += 'publications/';
      } else if (type === 'dataset') {
        url += 'datasets/';
      } else if (type === 'software') {
        url += 'software/';
      } else if (type === 'orp' || type === 'other') {
        url += 'other/';
      } else if (type === 'result') {
        url += 'results/';
      }
      url += id + '?format=json';
      return url;
    } else if (identifier) {
      // pid = "10.3389/fphys.2014.00466";
      let url = properties.searchAPIURLLAst + "resources2";
      url += "?pid="+encodeURIComponent(identifier.id) + "&pidtype=" + identifier.class + "&type=";
      if (type === 'publication') {
        url += 'publications';
      } else if (type === 'dataset') {
        url += 'datasets';
      } else if (type === 'software') {
        url += 'software';
      } else if (type === 'orp') {
        url += 'other';
      } else if (type === 'result') {
        url += 'results';
      }
      url += "&format=json";
      return url;
    }
  }

  getResultLandingInfo (id: string, identifier: Identifier, type: string, provenanceActionVocabulary: any, properties: EnvProperties): any {
    let url: string = this.buildResultLandingInfoUrl(id, identifier, type);

    let finalUrl: string = (properties.useCache) ? (properties.cacheUrl + encodeURIComponent(url)) : url;
    return this.http.get(finalUrl)
      .pipe(map(res => {
        if(!id && identifier) {
          if(!res['results'] || res['results'].length == 0) {
            throw new HttpErrorResponse({
              status: 404,
              statusText: "Not found",
              url: finalUrl,
              error: "Http failure response for "+finalUrl+": 404 Not Found"
            });
          }
          return res['results'][0];
        } else {
          return res;
        }
      }))
      .pipe(map(res => [res['result']['header']['dri:status'], res['result']['metadata']['oaf:entity'], res]))
      .pipe(map(res => [
        res[1]['oaf:result'],                 // 0
        res[1]['oaf:result']['title'],        // 1
        res[1]['oaf:result']['rels']['rel'],  // 2
        res[1]['oaf:result']['children'],     // 3
        res[1]['oaf:result']['pid'],          // 4
        res[1]['oaf:result']['journal'],      // 5
        res[1]['oaf:result']['language'],     // 6
        res[1]['oaf:result']['subject'],      // 7
        res[1]['oaf:result']['context'],      // 8
        res[1]['oaf:result']['creator'],      // 9
        res[1]['oaf:result']['country'] ,     // 10
        res[1]['oaf:result']['programmingLanguage'],              // 11 - software
        //res[1]['oaf:result']['resulttype'],
        (res[1]['extraInfo'] !== undefined && res[1]['extraInfo']['citations'] !== undefined)
          ? res[1]['extraInfo']['citations']['citation'] : null,  // 12
        res[0],                               // 13
        res[2]                                // 14
      ]))
      .pipe(map(res => this.parseResultLandingInfo(res, provenanceActionVocabulary, properties)));
  }

  // getProvenanceActionVocabulary (properties: EnvProperties): any {
  //   let url = properties.vocabulariesAPI+"dnet:provenanceActions.json";
  //
  //   return this.http.get((properties.useCache) ? (properties.cacheUrl + encodeURIComponent(url)) : url)
  //     .pipe(map(res => res['terms']))
  //     .pipe(map(res => this.parseProvenanceActionVocabulary(res, properties)));
  // }
  //
  // parseProvenanceActionVocabulary(terms: any, properties: EnvProperties) {
  //   var provenanceActionVocabulary: {} = {};
  //   for(let term of terms) {
  //     provenanceActionVocabulary[term.code] = term.englishName;
  //   }
  //   return provenanceActionVocabulary;
  // }

  private handleError (error: HttpErrorResponse) {
    // 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 throwError(error  || 'Server error');
  }

  parseResultLandingInfo (data: any, provenanceActionVocabulary: any, properties: EnvProperties): any {
    this.resultLandingInfo = new ResultLandingInfo();

    // res
    this.resultLandingInfo.record = data[14];
    this.resultLandingInfo.objIdentifier = data[14]["result"]["header"]["dri:objIdentifier"];
    this.resultLandingInfo.relcanId = ParsingFunctions.parseRelCanonicalId(this.resultLandingInfo.record, "result");
    this.resultLandingInfo.resultType = data[0].resulttype.classid;

    // res['result']['metadata']['oaf:entity']['oaf:result']
    if (data[0] != null) {
      let date: string = (data[0].dateofacceptance ? data[0].dateofacceptance : '') + ''; // transform to string in case it is an integer
      this.resultLandingInfo.date  = (date && (date).indexOf('-') !== -1) ? date.split('-')[0] : date;
      this.resultLandingInfo.dateofacceptance = data[0].dateofacceptance?Dates.getDate(data[0].dateofacceptance):null;
      this.resultLandingInfo.publisher = data[0].publisher;
      this.resultLandingInfo.description = this.parsingFunctions.parseDescription(data[0] && data[0].description?data[0].description:[]);
      this.resultLandingInfo.embargoEndDate = data[0].embargoenddate?Dates.getDate(data[0].embargoenddate):null;
    }

    if(data[0]['bestaccessright'] && data[0]['bestaccessright'].hasOwnProperty("classname")) {
      this.resultLandingInfo.accessMode = data[0]['bestaccessright'].classname;
    }
    // res['result']['metadata']['oaf:entity']['oaf:result']['title']
    if(data[1] != null) {
      if(Array.isArray(data[1])) {
        for(let i=0; i<data[1].length; i++) {
          if(data[1][i] && data[1][i].content) {
            if(!this.resultLandingInfo.title || data[1][i].classid == "main title") {
              this.resultLandingInfo.title = String(data[1][i].content);
            }
            if(data[1][i].classid == "main title") {
              break;
            }
          }
        }
        if(!this.resultLandingInfo.title) {
          this.resultLandingInfo.title = "";
        }
        // this.resultLandingInfo.title = (data[1][0] && data[1][0].content) ? String(data[1][0].content) : "";
        if(data[1][1].classid === 'subtitle') {
          this.resultLandingInfo.subtitle = (data[1][1] && data[1][1].content) ? String(data[1][1].content) : "";
        }
      } else {
        this.resultLandingInfo.title = (data[1] && data[1].content) ? String(data[1].content) : "";
      }
    }

    // res['result']['metadata']['oaf:entity']['oaf:result']['rels']['rel']
    if(data[2] != null) {
      let relation;
      let length = Array.isArray(data[2]) ? data[2].length : 1;

      for(let i=0; i<length; i++) {
        relation = Array.isArray(data[2]) ? data[2][i] : data[2];
        if(relation.hasOwnProperty("to")) {
          if(relation['to'].class && relation['to'].class.toLowerCase() == "isproducedby") {
            this.resultLandingInfo.fundedByProjects = this.parsingFunctions.parseFundingByProjects(this.resultLandingInfo.fundedByProjects, relation, provenanceActionVocabulary);
          }
          if(relation['to'].scheme && relation['to'].scheme == "dnet:result_result_relations") {
            let relationName = relation.to.class;
            if(!this.resultLandingInfo.relatedClassFilters.has(relationName)) {
              this.resultLandingInfo.relatedClassFilters.add(relationName);
            }

            let provenanceAction: string = "";
            if(provenanceActionVocabulary != null && relation.provenanceaction in provenanceActionVocabulary) {
              provenanceAction = provenanceActionVocabulary[relation.provenanceaction];
            }

            this.resultLandingInfo.relatedResults = this.parsingFunctions.parseResults(this.resultLandingInfo.relatedResults, relation, provenanceAction);
          }
        }
      }
    }

    // res['result']['metadata']['oaf:entity']['oaf:result']['children']
    if(data[3] != null) {
      if(data[3].hasOwnProperty("result")) {
        this.resultLandingInfo.deletedByInferenceIds = [];
        let length = Array.isArray(data[3]['result']) ? data[3]['result'].length : 1;

        for(let i=0; i<length; i++) {
          let result = Array.isArray(data[3]['result']) ? data[3]['result'][i] : data[3]['result'];
          this.resultLandingInfo.deletedByInferenceIds.push(result.objidentifier);
        }

      }

      if(data[3].hasOwnProperty("instance")) {
        this.resultLandingInfo.hostedBy_collectedFrom = new Array<HostedByCollectedFrom>();


        this.resultLandingInfo.types = new Array<string>();
        let types = new Set<string>();

        let counter = 0;
        let instance;

        let length = Array.isArray(data[3]['instance']) ? data[3]['instance'].length : 1;

        for(let i=0; i<length; i++) {
          instance = Array.isArray(data[3]['instance']) ? data[3]['instance'][i] : data[3]['instance'];

          this.parsingFunctions.parseTypes(this.resultLandingInfo.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(url.includes('&amp;')) {
              let regExp = /&amp;/gmu;
              let newUrl = url.replace(regExp, '&');
              url = newUrl;
            }

            /**********************************************************/
            if(instance.hasOwnProperty("hostedby")) {
              this.parsingFunctions.parseHostedBy_collectedFrom(this.resultLandingInfo.hostedBy_collectedFrom, instance, url, this.resultLandingInfo.accessMode);
            }
            /**********************************************************/
          }
        }

        /* Order Download from via openness*/
        this.resultLandingInfo.hostedBy_collectedFrom.sort((a, b) => {
          let firstAccessRight: string = (a.accessRight ? a.accessRight.toLowerCase() : null);
          let secondAccessRight: string = (b.accessRight ? b.accessRight.toLowerCase() : null);

          if (firstAccessRight === secondAccessRight) {
            return 0;
          } else {
            if (firstAccessRight === 'open access') {
              return -1;
            } else if (secondAccessRight === 'open access') {
              return 1;
            } else if (firstAccessRight === "open source") {
              return -1;
            } else if (secondAccessRight === "open source") {
              return 1;
            } else if (firstAccessRight === "embargo") {
              return -1;
            } else if (secondAccessRight === "embargo") {
              return 1;
            } else if (firstAccessRight === "restricted") {
              return -1;
            } else if (secondAccessRight === "restricted") {
              return 1;
            } else if (firstAccessRight === "closed access") {
              return -1;
            } else if (secondAccessRight === "closed access") {
              return 1;
            } else if (firstAccessRight === "not available") {
              return -1;
            } else if (secondAccessRight === "not available") {
              return 1;
            }
          }
          return 0;
        });
      }

      if(data[3].hasOwnProperty("externalreference")) {
        let externalResults: Map<string, Map<string, string>> = this.parseBioentitiesAndSoftware(data[3]);
        this.resultLandingInfo.bioentities = externalResults;
      }
    }

    // res['result']['metadata']['oaf:entity']['oaf:result']['pid']
    if(data[4] != null) {
      this.resultLandingInfo.identifiers = this.parsingFunctions.parseIdentifiers(data[4]);
    }

    // res['result']['metadata']['oaf:entity']['oaf:result']['journal']
    if(data[5] != null) {
      this.resultLandingInfo.journal = {"journal": "", "issn": "", "lissn": "", "eissn": "", "issue": "", "volume": "", "start_page": "", "end_page": ""}

      this.resultLandingInfo.journal['journal'] = data[5].content;
      this.resultLandingInfo.journal['issn'] = data[5].issn;
      this.resultLandingInfo.journal['lissn'] = data[5].lissn;
      this.resultLandingInfo.journal['eissn'] = data[5].eissn;
      this.resultLandingInfo.journal['issue'] = data[5].iss;
      this.resultLandingInfo.journal['volume'] = data[5].vol;
      this.resultLandingInfo.journal['start_page'] = data[5].sp;
      this.resultLandingInfo.journal['end_page'] = data[5].ep;
    }

    // res['result']['metadata']['oaf:entity']['oaf:result']['language']
    if(data[6] != null) {
      this.resultLandingInfo.languages = this.parsingFunctions.parseLanguages(data[6]);
      // let languagesAndCodes: string[][] = this.parsingFunctions.parseLanguages(data[6]);
      // this.resultLandingInfo.languages = languagesAndCodes[0];
      // this.resultLandingInfo.languageCodes = languagesAndCodes[1];
    }

    // res['result']['metadata']['oaf:entity']['oaf:result']['country']
    if(data[10] != null) {
      this.resultLandingInfo.countries = this.parsingFunctions.parseCountries(data[10]);
    }

    // res['result']['metadata']['oaf:entity']['oaf:result']['subject']
    if(data[7] != null) {
      let subjectResults: [string[], Map<string, string[]>, Map<string, string[]>] = this.parsingFunctions.parseAllSubjects(data[7]);
      this.resultLandingInfo.subjects = subjectResults[0];
      this.resultLandingInfo.otherSubjects = subjectResults[1];
      this.resultLandingInfo.classifiedSubjects = subjectResults[2];

      this.resultLandingInfo.showEgiNotebookButton = this.parsingFunctions.notebookInSubjects;
    }

    this.resultLandingInfo.hostedBy_collectedFrom = this.parsingFunctions.addPublisherToHostedBy_collectedFrom(
      this.resultLandingInfo.hostedBy_collectedFrom, this.resultLandingInfo.publisher,
      this.resultLandingInfo.journal, this.resultLandingInfo.identifiers);

    // res['result']['metadata']['oaf:entity']['oaf:result']['programmingLanguage']
    if(data[11] != null) {
      this.resultLandingInfo.programmingLanguages = this.parsingFunctions.parseProgrammingLanguages(data[11]);
    }

    // res['result']['metadata']['oaf:entity']['extraInfo']['citations']['citation']
    if(data[12] != null) {
      this.resultLandingInfo.references = this.parsingFunctions.parseReferences(data[12]);
    }

    // res['result']['metadata']['oaf:entity']['oaf:result']['context']
    if(data[8] != null) {
      this.resultLandingInfo.contexts = this.parsingFunctions.parseContexts(data[8]);
    }

    // res['result']['header']['dri:status']
    if(data[13] != null && data[13] == "under curation") {
      this.resultLandingInfo.underCurationMessage = true;
    } else {
      this.resultLandingInfo.underCurationMessage = false;
    }

    // res['result']['metadata']['oaf:entity']['oaf:result']['creator']
    if(data[9] != null) {
      if(this.resultLandingInfo.authors == undefined) {
        this.resultLandingInfo.authors = new Array<{"fullName": string, "orcid": string, "orcid_pending": string}>();
      }

      let authors = data[9];
      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 = author.orcid.toUpperCase();
          }
          if(author.orcid_pending) {
            author.orcid_pending = author.orcid_pending.toUpperCase();
          }
          this.resultLandingInfo['authors'][author.rank] = {"fullName": author.content, "orcid": author.orcid, "orcid_pending": author.orcid_pending};
        }
      }
      this.resultLandingInfo.authors = this.resultLandingInfo.authors.filter(function (item) {
        return (item != undefined && item.fullName != undefined);
      });
    }

    this.resultLandingInfo.relatedResults = this.parsingFunctions.sortByPercentage(this.resultLandingInfo.relatedResults);

    return this.resultLandingInfo;
  }

  parseRelatedOrganizations(organizations: Organization[], relation: any): Organization[] {
    if(organizations == undefined) {
      organizations = []
    }

    let organization: { "name": string, "shortname": string,
      "id": string, "websiteUrl": string,
      "country": string, "trust": number
    } = {
      name: "", shortname: "",
      id: "", websiteUrl: "",
      country: "", trust: null
    };

    organization.id = relation['to'].content;
    organization.name = relation.legalname;
    organization.shortname = relation.legalshortname;
    organization.websiteUrl = relation.websiteurl;
    if(relation.country) {
      organization.country = relation.country.classname;
    }
    if(relation.trust) {
      organization.trust = Math.round(relation.trust*100);
    }

    organizations.push(organization);
    return organizations;
  }

  parseBioentitiesAndSoftware(children: any) : Map<string, Map<string, string>> {
    let bioentities: Map<string, Map<string, string>>;

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

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

      if(externalreference.hasOwnProperty("qualifier")) {
        if(externalreference['qualifier'].classid == "accessionNumber") {

          if(bioentities == undefined) {
            bioentities = new Map<string, Map<string, string>>();
          }

          if(!bioentities.has(externalreference.sitename)) {
            bioentities.set(externalreference.sitename, new Map<string, string>());
          }
          bioentities.get(externalreference.sitename).set(externalreference.refidentifier, externalreference.url);

        }
      }
    }

    return bioentities;
  }

  getOpenCitations(id: string, properties:EnvProperties) {
    //https://services.openaire.eu/opencitations/getCitations?id=doajarticles::2634200c24772ee8f10232d3e184ec65
    let url = properties.openCitationsAPIURL+id;// "https://services.openaire.eu/opencitations/getCitations?id=" + id;
    let key = url;

    //return this.http.get((properties.useCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
    return this.http.get(url)
      .pipe(map(res => [res['total'], this.parseOpenCitations(res['results'])]));
  }

  parseOpenCitations(openCitations: any): {"url": string, "title": string, "year": string, "doi": string, "authors": string[]}[] {
    //title, doi, authors
    let citations = new Array<{"url": string, "title": string, "year": string, "doi": string, "authors": string[]}>();

    let openCitation;

    let length = Array.isArray(openCitations) ? openCitations.length : 1;
    for(let i=0; i<length; i++) {
      openCitation = Array.isArray(openCitations) ? openCitations[i] : openCitations;

      let citation: {"url": string, "title": string,  "year": string, "doi": string, "authors": string[]} = {"url": "", "title": "", "year": "", "doi": "", "authors": []};

      if(openCitation && openCitation.id) {
        citation.url = openCitation.id;
        citation.title = openCitation.title;
        //citation.type = openCitation.type;
        citation.year = (openCitation.pubDate && (openCitation.pubDate).indexOf('-') !== -1)?openCitation.pubDate.split('-')[0]:openCitation.pubDate;
        citation.doi = openCitation.doi;

        let authorsLength = Array.isArray(openCitation.authors) ? openCitation.authors.length : 1;
        for(let i=0; i<authorsLength; i++) {
          let author = Array.isArray(openCitation.authors) ? openCitation.authors[i] : openCitation.authors;

          if(author) {
            let lastFirstName: string = "";
            if(author.lastName) {
              lastFirstName = author.lastName;
            }
            if(author.lastName && author.firstName) {
              lastFirstName += ", ";
            }
            if(author.firstName) {
              lastFirstName += author.firstName;
            }

            if(lastFirstName) {
              citation.authors.push(lastFirstName);
            }
          }
        }
        citations.push(citation);
      }
    }
    return citations;
  }

  getEnermapsDetails(id: string) {
    let url = properties.enermapsURL+"/api/db/metadata?shared_id=eq."+id;
    return this.http.get((properties.useLongCache)? (properties.cacheUrl+encodeURIComponent(url)): url)
    // return this.http.get(url)
      .pipe(map(res => this.parseEnermapsDetails(res)));
  }

  parseEnermapsDetails(response: any) {
    let details = Array.isArray(response) ? response[0] : response;
    let metadata = (details && details.metadata) ? details.metadata : null;

    let entries = [];
    let keys = metadata ? Object.keys(metadata) : null;
    for(let key of keys) {
      if(key != "shared_id" && key && metadata[key]) {
        entries.push([key+"", metadata[key]+""]);
      }
    }
    return entries;
  }
}