import {Injectable} from '@angular/core';
import {Http, Response,Headers, RequestOptions} from '@angular/http';
import {HttpClient, HttpErrorResponse, HttpHeaders} from "@angular/common/http";
import {Observable, throwError} from 'rxjs';
import {DataProviderInfo} from '../../utils/entities/dataProviderInfo';



import{EnvProperties} from '../../utils/properties/env-properties';
import {map} from "rxjs/operators";


@Injectable()
export class DataProviderService {

    constructor(private http: HttpClient ) {}

    dataProviderInfo: DataProviderInfo;

    getDataproviderInfo (id: string, properties:EnvProperties):any {
        let url = properties.searchAPIURLLAst + 'datasources/' +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 => [res['oaf:datasource'],
                                 res['oaf:datasource']['datasourcetype'],
                                 res['oaf:datasource']['openairecompatibility'],
                                 res['oaf:datasource']['collectedfrom'],
                                 res['oaf:datasource']['accessinfopackage'],
                                 res['oaf:datasource']['rels']['rel'],
                                 res['oaf:datasource']['journal'] //6
                     ]))
                     .pipe(map(res => this.parseDataProviderInfo(res)));

    }

    getDataproviderAggregationStatus(original_id: string, properties:EnvProperties):any {
        //let headers = new Headers({'Content-Type': 'application/json', 'accept': 'application/json'});
        //let options = new RequestOptions({headers: headers});

      const options = {
        headers: new HttpHeaders({
          'Content-Type': 'application/json',
          'accept': 'application/json'})
      };

      let page: number = 0;
        let size: number = 1;
        return this.http.post(properties.datasourcesAPI+page+"/"+size+"?requestSortBy=id&order=ASCENDING", JSON.stringify({ "id": original_id }), options)
            //.map(res => <any> res.json())
            .pipe(map(res => res['datasourceInfo']))
            .pipe(map(res => this.parseDataproviderAggregationStatus(res)));
    }

    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');
    }

    parseDataproviderAggregationStatus(data: any): any {
        var aggregationStatus: {"fundedContent": string, "indexRecords": string, "fulltexts": string, "lastUpdateDate": string} = null;
        if(data != null && data[0] != null) {
          aggregationStatus = {"fundedContent": "-1", "indexRecords": "-1", "fulltexts": "-1", "lastUpdateDate": null};
          aggregationStatus.fundedContent = data[0].fundedContent;
          aggregationStatus.indexRecords = data[0].indexRecords;
          aggregationStatus.fulltexts = data[0].fulltexts;

          if(data[0].hasOwnProperty("aggregationHistory")) {
            let length = Array.isArray(data[0]["aggregationHistory"]) ? data[0]["aggregationHistory"].length : 1;

            for(let i=0; i<length; i++) {
              var aggregationHistory = Array.isArray(data[0]["aggregationHistory"]) ? data[0]["aggregationHistory"][i] : data[0]["aggregationHistory"];
              if(aggregationHistory && aggregationHistory.indexedVersion == true) {
                aggregationStatus.lastUpdateDate = aggregationHistory.date;
                break;
              }
            }
          }
        }
        return aggregationStatus;
    }

    parseDataProviderInfo (data: any):any {
        this.dataProviderInfo = new DataProviderInfo();

        if(data[0] != null) {
            this.dataProviderInfo.title = {"name": (data[0].englishname)?data[0].englishname: data[0].officialname, "url": data[0].websiteurl};
            this.dataProviderInfo.officialName =  data[0].officialname;

            var pattern = /.{12}::.+/;
            var originalIds =(data[0].originalId)?data[0].originalId:"";

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

            for(let i=0; i<length; i++) {
              var originalId = Array.isArray(originalIds) ? originalIds[i] : originalIds;
              var matched = originalId.match(pattern);

              if(matched && originalId && originalId != ""){
                if(originalId.indexOf("opendoar____::") != -1){
                  this.dataProviderInfo.openDoarId = originalId.split("opendoar____::")[1];
                }else if (originalId.indexOf("re3data_____::") != -1){
                  this.dataProviderInfo.r3DataId = originalId.split("re3data_____::")[1];
                }
                this.dataProviderInfo.originalId = originalId;
              }
            }

            this.dataProviderInfo.subjects = [];
            length = Array.isArray(data[0]['subjects']) ? data[0]['subjects'].length : 1;
            for(let i=0; i<length; i++) {
              let subject = Array.isArray(data[0]['subjects']) ? data[0]['subjects'][i] :data[0]['subjects'];
              if(subject && subject.content) {
                this.dataProviderInfo.subjects.push(subject.content);
              }
            }

            if(!Array.isArray(data[0]['description'])) {
              this.dataProviderInfo.description = (data[0]['description']) ? String(data[0]['description']) : "";
            } else {
              this.dataProviderInfo.description = (data[0]['description'][0]) ? String(data[0]['description'][0]) : "";
            }
        }

        if(data[1] != null) {
            this.dataProviderInfo.type = data[1].classname;

            if(data[1].classid == "entityregistry" || data[1].classid == "entityregistry::projects" || data[1].classid == "entityregistry::repositories") {
                this.dataProviderInfo.registry = true;
            } else {
                this.dataProviderInfo.registry = false;
            }

            if(this.dataProviderInfo.tabs == undefined) {
                this.dataProviderInfo.tabs = new Array<{"name": string, "content": string}>();
            }
            this.dataProviderInfo.tabs = [];
            if(this.dataProviderInfo.tabsInTypes.publicationsTab.has(data[1].classid)) {
                this.dataProviderInfo.tabs.push({"name": "Publications", "content": "publicationsTab"});
                this.dataProviderInfo.tabs2.push("Publications");
            }
            if(this.dataProviderInfo.tabsInTypes.datasetsTab.has(data[1].classid)) {
                this.dataProviderInfo.tabs.push({"name": "Research Data", "content": "datasetsTab"});
                this.dataProviderInfo.tabs2.push("Research Data");
            }

            if(this.dataProviderInfo.tabsInTypes.projectsTab.has(data[1].classid)) {
                this.dataProviderInfo.tabs.push({"name": "Projects", "content": "projectsTab"});
                this.dataProviderInfo.tabs2.push("Projects");
            }
            if(this.dataProviderInfo.tabsInTypes.datasourcesTab.has(data[1].classid)) {
                this.dataProviderInfo.tabs.push({"name": "Content Providers", "content": "datasourcesTab"});
                this.dataProviderInfo.tabs2.push("Content Providers");
            }

            if(this.dataProviderInfo.tabsInTypes.relatedDatasourcesTab.has(data[1].classid)) {
                this.dataProviderInfo.tabs.push({"name": "Related Content Providers", "content": "relatedDatasourcesTab"});
                this.dataProviderInfo.tabs2.push("Related Content Providers");
            }

            if(this.dataProviderInfo.tabsInTypes.statisticsTab.has(data[1].classid)) {
                this.dataProviderInfo.tabs.push({"name": "Statistics", "content": "statisticsTab"});
                this.dataProviderInfo.tabs2.push("Statistics");
            }

            if(this.dataProviderInfo.tabsInTypes.softwareTab.has(data[1].classid)) {
                this.dataProviderInfo.tabs.push({"name": "Software", "content": "softwareTab"});
                this.dataProviderInfo.tabs2.push("Software");
            }

            if(this.dataProviderInfo.tabsInTypes.orpsTab.has(data[1].classid)) {
                this.dataProviderInfo.tabs.push({"name": "Other Research Products", "content": "orpsTab"});
                this.dataProviderInfo.tabs2.push("Other Research Products");
            }

            if(this.dataProviderInfo.tabsInTypes.metricsTab.has(data[1].classid)) {
                this.dataProviderInfo.tabs.push({"name": "Metrics", "content": "metricsTab"});
                this.dataProviderInfo.tabs2.push("Metrics");
            }

            if(this.dataProviderInfo.resultTypes.collectedFrom.has(data[1].classid)) {
                this.dataProviderInfo.resultsBy = "collectedFrom";
            } else if(this.dataProviderInfo.resultTypes.hostedBy.has(data[1].classid)) {
                this.dataProviderInfo.resultsBy = "hostedBy";
            }
        }

        if(!this.dataProviderInfo.registry) {
            if(data[2] != null) {
                this.dataProviderInfo.compatibility = {"info": "", "name": "", "id": ""};
                this.dataProviderInfo.compatibility.info = data[2].classname;
                //this.dataProviderInfo.compatibility = data[2].classname;
            }

            if(data[2] != null && data[2].classid == "hostedBy" && data[3] != null) {
              this.dataProviderInfo.compatibility.name = data[3].name;
              this.dataProviderInfo.compatibility.id = data[3].id;

              if(this.dataProviderInfo.compatibility.name) {
                this.dataProviderInfo.compatibility.info = "Collected from ";
              }
            }

            if(data[4] != null) {
                let oaiPmhURL:string;
                oaiPmhURL = Array.isArray(data[4]) ? data[4][0]:data[4];
                if(oaiPmhURL != '' && oaiPmhURL != 'unknown') {
                    this.dataProviderInfo.oaiPmhURL = oaiPmhURL;
                }
            }
        }

        if(data[5] != null) {
            let mydata;
            let counter = 0;
            let countriesSet: Set<string>;
            let length = data[5].length!=undefined ? data[5].length : 1;

            for(let i=0; i<length; i++) {
                mydata = data[5].length!=undefined ? data[5][i] : data[5];
                if(mydata.hasOwnProperty("to")) {
                    if(mydata['to'].class == "provides" && mydata['to'].type == "organization") {
                        //if(this.dataProviderInfo.organizations == undefined) {
                        if(this.dataProviderInfo.organizations.length == 0) {
                            //this.dataProviderInfo.organizations = new Array<{"name": string, "url": string}>();
                            this.dataProviderInfo.countries = new Array<string>();
                            countriesSet = new Set<string>();
                        }

                        this.dataProviderInfo.organizations[counter] = {"acronym": "", "name": "", "id": ""};
                        //this.dataProviderInfo.organizations[counter]['name'] = (mydata.legalname ? mydata.legalname : "[no title available");
                        this.dataProviderInfo.organizations[counter]['id'] = mydata['to'].content;

                        if(mydata.hasOwnProperty("legalshortname")) {
                          this.dataProviderInfo.organizations[counter]['acronym'] = mydata.legalshortname;
                        }
                        if(mydata.hasOwnProperty("legalname")) {
                          this.dataProviderInfo.organizations[counter]['name'] = mydata.legalname;
                        }
                        if(!this.dataProviderInfo.organizations[counter]['acronym'] && !this.dataProviderInfo.organizations[counter]['name']){
                          // acronym is displayed with link and name only in tooltip
                          this.dataProviderInfo.organizations[counter]['acronym'] = "[no title available]";
                        }

                        if(mydata.country != '' && mydata['country'].classname != '') {
                            if(!countriesSet.has(mydata['country'].classname)) {
                                this.dataProviderInfo.countries.push(mydata['country'].classname);
                                countriesSet.add(mydata['country'].classname);
                            }
                        }

                        counter++;
                    }
                }
            }
        }
        if(data[6] != null) {
            this.dataProviderInfo.journal = {"journal": "", "issn": "", "lissn": "", "eissn": ""};
            this.dataProviderInfo.journal['journal'] = data[6].content;
            this.dataProviderInfo.journal['issn'] = data[6]['issn'];
            this.dataProviderInfo.journal['lissn'] = data[6]['lissn'];
            this.dataProviderInfo.journal['eissn'] = data[6]['eissn'];

        }else{
            this.dataProviderInfo.journal = null;
            this.dataProviderInfo.journal = {"journal": "", "issn": "", "lissn": "", "eissn": ""};
        }

        return this.dataProviderInfo;
    }
}