import {Component, Input, ViewChild} from '@angular/core';
import { ActivatedRoute} from '@angular/router';
import {Location} from '@angular/common';

import { Filter, Value} from '../searchUtils/searchHelperClasses.class';

import {SearchPublicationsService} from '../../services/searchPublications.service';
import {SearchResult}     from '../../utils/entities/searchResult';
import {ErrorCodes} from '../../utils/properties/openaireProperties';
import {SearchFields, FieldDetails} from '../../utils/properties/searchFields';
import {SearchPageComponent } from '../searchUtils/searchPage.component';
import {SearchUtilsClass} from '../searchUtils/searchUtils.class';
import {DOI} from '../../utils/string-utils.class';
import{EnvProperties} from '../../utils/properties/env-properties';

@Component({
    selector: 'search-publications',
    template: `

    <search-page  pageTitle="Search Publications"
                  formPlaceholderText = "Search for Publications"
                 type="publications" entityType="publication"
                 [(filters)] = "filters" [(results)] = "results"
                 [(searchUtils)] = "searchUtils"   [(baseUrl)] = baseUrl
                 (queryChange)="queryChanged($event)"
                 [csvParams]="csvParams" csvPath="publications"
                 advancedSearchLink="/search/advanced/publications"
                 [disableForms]="disableForms"
                 [loadPaging]="loadPaging"
                 [oldTotalResults]="oldTotalResults"
                 searchFormClass="publicationsSearchForm"
                 [(openaireLink)]=openaireLink
                 [(advancedSearchParameters)]=advancedSearchParameters
                 [(connectCommunityId)]=connectCommunityId
                 >
    </search-page>

    `

})
export class SearchPublicationsComponent {
  private errorCodes: ErrorCodes;

  public results =[];
  public filters =[];
  public searchUtils:SearchUtilsClass = new SearchUtilsClass();
  public baseUrl:string = "";
  public sub: any;
  public subResults: any;
  public searchFields:SearchFields = new SearchFields();
  public refineFields: string[] =  this.searchFields.RESULT_REFINE_FIELDS;
  public fieldIdsMap=this.searchFields.RESULT_FIELDS;
    //:  { [key:string] :{ name:string, operator:string, type:string, indexField:string, equalityOperator:string  }} = this.searchFields.PUBLICATION_FIELDS_MAP;
  public urlParams : Map<string, string>;
  @ViewChild (SearchPageComponent) searchPage : SearchPageComponent ;
  public _location:Location;

  public CSV: any = {  "columnNames":  ["Title", "Authors", "Publication Year", "DOI",
                                       /*"Download From", "Publication type", "Journal",*/
                                       "Funder", "Project Name (GA Number)", "Access"],
                      "export":[]
                  };
  public CSVDownloaded = false;
  public csvParams: string;
  public disableForms: boolean = false;
  public loadPaging: boolean = true;
  public oldTotalResults: number = 0;
  @Input() openaireLink: string;
  @Input() connectCommunityId: string;
  @Input() advancedSearchParameters ;
  pagingLimit = 0;
properties: EnvProperties;
  constructor (private route: ActivatedRoute, private _searchPublicationsService: SearchPublicationsService ) {
    this.errorCodes = new ErrorCodes();
    this.searchUtils.status = this.errorCodes.LOADING;
    this.searchUtils.page =1;

  }

  public ngOnInit() {
    this.route.data
      .subscribe((data: { envSpecific: EnvProperties }) => {
        this.properties = data.envSpecific;
        this.baseUrl = data.envSpecific.searchLinkToPublications;
        this.pagingLimit = data.envSpecific.pagingLimit;

      });
    this.searchPage.refineFields = this.refineFields;
    this.searchPage.fieldIdsMap = this.fieldIdsMap;
    this.searchPage.type = "publications";
    var firstLoad =true;
    this.sub =  this.route.queryParams.subscribe(params => {
        if(params['page'] && this.searchUtils.page != params['page']) {
          this.loadPaging = false;
          this.oldTotalResults = this.searchUtils.totalResults;
        }

        this.searchUtils.keyword = (params['keyword']?params['keyword']:'');
        var refine = true;
        if(this.searchUtils.page != ((params['page']=== undefined)?1:+params['page']) && this.filters && !firstLoad){
          refine = false;

        }
        firstLoad = false;
        this.searchUtils.page = (params['page']=== undefined)?1:+params['page'];
        var queryParameters = this.searchPage.getQueryParametersFromUrl(params);
        this._getResults(queryParameters, refine, this.searchUtils.page, this.searchUtils.size);
    });
  }

  public ngOnDestroy() {
    if(this.sub){
      this.sub.unsubscribe();
    }
    if(this.subResults){
      this.subResults.unsubscribe();
    }
  }

public getResultsForEntity(entity:string, id:string, page: number, size: number){
  var parameters = "";

  if(entity == "project") {
    parameters = "projects/"+id;
  }

  if(parameters != "") {

      this._searchPublicationsService.searchPublicationsForEntity(parameters, page, size, this.properties).subscribe(
          data => {
              this.searchUtils.totalResults = data[0];
              console.info("search Publications for "+entity+": [Parameters:"+parameters+" ]  [total results:"+this.searchUtils.totalResults+"]");
              this.results = data[1];

              //var errorCodes:ErrorCodes = new ErrorCodes();
              this.searchUtils.status = this.errorCodes.DONE;
              if(this.searchUtils.totalResults == 0 ){
                this.searchUtils.status = this.errorCodes.NONE;
              }
          },
          err => {
              console.log(err);
               //TODO check erros (service not available, bad request)
              // if( ){
              //   this.searchUtils.status = ErrorCodes.ERROR;
              // }
              //var errorCodes:ErrorCodes = new ErrorCodes();
              //this.searchUtils.status = errorCodes.ERROR;
              if(err.status == '404') {
                this.searchUtils.status = this.errorCodes.NOT_FOUND;
              } else if(err.status == '500') {
                this.searchUtils.status = this.errorCodes.ERROR;
              } else {
                this.searchUtils.status = this.errorCodes.NOT_AVAILABLE;
              }
          }
      );
  }
}

public getResultsForDataproviders(id:string, resultsFrom:string, page: number, size: number){
  var parameters;
  if(resultsFrom == "collectedFrom") {
      parameters = "publications?fq=collectedfromdatasourceid exact "+'"'+id+'"';
  } else if(resultsFrom == "hostedBy") {
      parameters = "publications?fq=resulthostingdatasourceid exact "+'"'+id+'"';
  }

  if(parameters != "") {

      this._searchPublicationsService.searchPublicationsForDataproviders(parameters, page, size, this.properties).subscribe(
          data => {
              this.searchUtils.totalResults = data[0];
              console.info("search Publications for Dataproviders: [Parameters:"+parameters+" ]  [total results:"+this.searchUtils.totalResults+"]");
              this.results = data[1];

              //var errorCodes:ErrorCodes = new ErrorCodes();
              this.searchUtils.status = this.errorCodes.DONE;
              if(this.searchUtils.totalResults == 0 ){
                this.searchUtils.status = this.errorCodes.NONE;
              }
          },
          err => {
              console.log(err);
               //TODO check erros (service not available, bad request)
              // if( ){
              //   this.searchUtils.status = ErrorCodes.ERROR;
              // }
              //var errorCodes:ErrorCodes = new ErrorCodes();
              //this.searchUtils.status = errorCodes.ERROR;
              if(err.status == '404') {
                this.searchUtils.status = this.errorCodes.NOT_FOUND;
              } else if(err.status == '500') {
                this.searchUtils.status = this.errorCodes.ERROR;
              } else {
                this.searchUtils.status = this.errorCodes.NOT_AVAILABLE;
              }
          }
      );
  }
}

public getResults(keyword:string,refine:boolean, page: number, size: number){
  var parameters = "";
  if(keyword.length > 0){
    var DOIs:string[] = DOI.getDOIsFromString(keyword);
    var doisParams = "";

    for(var i =0 ;i < DOIs.length; i++){
      doisParams+=(doisParams.length > 0?"&":"")+'doi="'+ DOIs[i]+'"';
    }
    if(doisParams.length > 0){
        parameters +=  "&"+doisParams;
    }else{
      parameters = "q=" +  keyword;
    }
  }
  this._getResults(parameters,refine,page,size);
}

private _getResults(parameters:string,refine:boolean, page: number, size: number){
  if(page > this.pagingLimit) {
    size=0;
  }
  if(page <= this.pagingLimit || this.searchUtils.status == this.errorCodes.LOADING) {
    this.csvParams = parameters;

    this.searchUtils.status = this.errorCodes.LOADING;
    this.disableForms = true;
    this.results = [];
    this.searchUtils.totalResults = 0;

    this.subResults = this._searchPublicationsService.searchPublications(parameters,(refine)?this.searchPage.getRefineFieldsQuery():null, page, size, this.searchPage.getFields(), this.properties).subscribe(
        data => {
          console.info(data);
            this.searchUtils.totalResults = data[0];
            console.info("search Publications: [Parameters:"+parameters+" ]  [total results:"+this.searchUtils.totalResults+"]");
            this.results = data[1];
            if(refine){
              this.filters = data[2];
            }
            this.searchPage.checkSelectedFilters(this.filters);
            this.searchPage.updateBaseUrlWithParameters(this.filters);

            //var errorCodes:ErrorCodes = new ErrorCodes();

            this.searchUtils.status = this.errorCodes.DONE;
            if(this.searchUtils.totalResults == 0 ){
              this.searchUtils.status = this.errorCodes.NONE;
            }
            //this.searchPage.closeLoading();
            this.disableForms = false;

            if(this.searchUtils.status == this.errorCodes.DONE) {
              // Page out of limit!!!
              let totalPages:any = this.searchUtils.totalResults/(this.searchUtils.size);
              if(!(Number.isInteger(totalPages))) {
                  totalPages = (parseInt(totalPages, 10) + 1);
              }
              if(totalPages < page) {
                this.searchUtils.totalResults = 0;
                this.searchUtils.status = this.errorCodes.OUT_OF_BOUND;
              }
            }
        },
        err => {
            console.log(err);
             //TODO check erros (service not available, bad request)
            // if( ){
            //   this.searchUtils.status = ErrorCodes.ERROR;
            // }
            //var errorCodes:ErrorCodes = new ErrorCodes();
            //this.searchUtils.status = errorCodes.ERROR;
            if(err.status == '404') {
              this.searchUtils.status = this.errorCodes.NOT_FOUND;
            } else if(err.status == '500') {
              this.searchUtils.status = this.errorCodes.ERROR;
            } else {
              this.searchUtils.status = this.errorCodes.NOT_AVAILABLE;
            }

            //this.searchPage.closeLoading();
            this.disableForms = false;

        }
    );
  }
}
/*
public getAggregatorResults(id:string, page: number, size: number){
  this.subResults = this._searchPublicationsService.searchAggregators('&fq=collectedfromdatasourceid exact "'+id+'"',"&refine=true&fields=resulthostingdatasource" , page, size).subscribe(
      data => {
          this.results = data;

          var errorCodes:ErrorCodes = new ErrorCodes();
          this.searchUtils.status = errorCodes.DONE;
          if(this.searchUtils.totalResults == 0 ){
            this.searchUtils.status = errorCodes.NONE;
          }
      },
      err => {
          console.log(err);
           //TODO check erros (service not available, bad request)
          // if( ){
          //   this.searchUtils.status = ErrorCodes.ERROR;
          // }
          var errorCodes:ErrorCodes = new ErrorCodes();
          this.searchUtils.status = errorCodes.ERROR;
      }
  );
}*/

  public queryChanged($event) {
    this.loadPaging = true;

    var parameters = $event.value;
    console.info("queryChanged: Execute search query "+parameters);
    console.info("Search Pubs::page "+this.searchUtils.page);
    this._getResults(parameters, true, this.searchUtils.page, this.searchUtils.size);

  }


}