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

import {SearchResearchResultsService} from '../../services/searchResearchResults.service';
import {ErrorCodes} from '../../utils/properties/errorCodes';
import {ErrorMessagesComponent} from '../../utils/errorMessages.component';
import {SearchFields} from '../../utils/properties/searchFields';
import {SearchPageComponent} from '../searchUtils/searchPage.component';
import {SearchCustomFilter, SearchUtilsClass} from '../searchUtils/searchUtils.class';
import {DOI} from '../../utils/string-utils.class';
import {EnvProperties} from '../../utils/properties/env-properties';

@Component({
  selector: 'search-research-results',
  template: `
    <search-page  pageTitle="Search {{ getEntityName(resultType, true, true) | titlecase }}"
                  formPlaceholderText = "Search for {{ getEntityName(resultType, true, true) | titlecase }}"
                 [type]="getEntityName(resultType, true, true)" [entityType]="resultType"
                 [(filters)] = "filters" [(results)] = "results"
                 [(searchUtils)] = "searchUtils"   [(baseUrl)] = baseUrl
                 (queryChange)="queryChanged($event)"
                 [csvParams]="csvParams" [csvPath]="getEntityName(resultType, true, false)"
                 [advancedSearchLink]="advancedSearchLink"
                 [disableForms]="disableForms"
                 [loadPaging]="loadPaging"
                 [oldTotalResults]="oldTotalResults" 
                 [searchFormClass]="customFilter && customFilter.queryFieldName == 'communityId' ? 
                    'communityPanelBackground' : 'publicationsSearchForm'"
                 [(openaireLink)]=openaireLink
                 [(advancedSearchParameters)]=advancedSearchParameters
                  [piwikSiteId]=piwikSiteId [hasPrefix]="hasPrefix"
                 [(sort)]=sort >
    </search-page>

    `

})
export class SearchResearchResultsComponent {
  @Input() resultType: string = "publication";

  public advancedSearchLink: string = "";
  private errorCodes: ErrorCodes;
  private errorMessages: ErrorMessagesComponent;
  @Input() piwikSiteId = null;
  @Input() hasPrefix: boolean = true;
  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;
  public urlParams : Map<string, string>;
  @ViewChild (SearchPageComponent) searchPage : SearchPageComponent ;
  public _location:Location;

  public CSV: any = {
    "columnNames":  [
      "Title", "Authors", "Publication Year", "DOI",
      "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() customFilter:SearchCustomFilter= null;
  @Input() advancedSearchParameters ;
  pagingLimit = 0;
  public sort: boolean = true;
  properties: EnvProperties;
  constructor (private route: ActivatedRoute, private _searchResearchResultsService: SearchResearchResultsService ) {
    this.errorCodes = new ErrorCodes();
    this.errorMessages = new ErrorMessagesComponent();
    this.searchUtils.status = this.errorCodes.LOADING;
    this.searchUtils.page =1;

  }

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

        if(this.resultType == "publication") {
          this.advancedSearchLink = this.properties.searchLinkToAdvancedPublications;
          this.baseUrl = this.properties.searchLinkToPublications;
        } else if(this.resultType == "dataset") {
          this.advancedSearchLink = this.properties.searchLinkToAdvancedDatasets;
          this.baseUrl = this.properties.searchLinkToDatasets;
        } else if(this.resultType == "software") {
          this.advancedSearchLink = this.properties.searchLinkToAdvancedSoftware;
          this.baseUrl = this.properties.searchLinkToSoftware;
        } else if(this.resultType == "other") {
          this.advancedSearchLink = this.properties.searchLinkToAdvancedOrps;
          this.baseUrl = this.properties.searchLinkToOrps;
        }
      });
    this.searchPage.refineFields = this.refineFields;
    this.searchPage.fieldIdsMap = this.fieldIdsMap;
    this.searchPage.type = this.getEntityName(this.resultType, true, true);
    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'];
      this.searchUtils.size = (params['size']=== undefined)?10:+params['size'];
      if(this.searchUtils.size != 5 && this.searchUtils.size != 10 && this.searchUtils.size != 20 && this.searchUtils.size != 50) {
        this.searchUtils.size = 10;
      }
      this.searchUtils.sortBy = (params['sortBy'])?params['sortBy']:'';
      if(this.searchUtils.sortBy && this.searchUtils.sortBy != "resultdateofacceptance,descending" && this.searchUtils.sortBy != "resultdateofacceptance,ascending") {
        this.searchUtils.sortBy = "";
      }

      this.searchPage.customFilter = this.customFilter;
      var queryParameters = this.searchPage.getQueryParametersFromUrl(params);
      this._getResults(queryParameters, refine, this.searchUtils.page, this.searchUtils.size, this.searchUtils.sortBy);
    });
  }

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

  public getResults(keyword:string,refine:boolean, page: number, size: number, sortBy: string){
    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,sortBy);
  }

  private _getResults(parameters:string,refine:boolean, page: number, size: number, sortBy: string){
    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._searchResearchResultsService.search(this.resultType, parameters,(refine)?this.searchPage.getRefineFieldsQuery():null, page, size, sortBy, this.searchPage.getFields(), this.properties).subscribe(
        data => {
          this.searchUtils.totalResults = data[0];
          this.results = data[1];
          if(refine){
            this.filters = data[2];
          }
          this.searchPage.checkSelectedFilters(this.filters);
          this.searchPage.updateBaseUrlWithParameters(this.filters);

          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);
          this.handleError("Error getting "+this.getEntityName(this.resultType, true, true), err);
          this.searchUtils.status = this.errorMessages.getErrorCode(err.status);

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

  private handleError(message: string, error) {
    console.error(this.getEntityName(this.resultType, true, true)+" simple Search Page (SearchResearchResultsComponent): "+message, error);
  }

  private getEntityName (entityType:string, plural:boolean, full:boolean): string {
    if(entityType == "publication") {
      return "publication" + (plural ? "s" : "");
    } else if(entityType == "dataset") {
      return (full ? "research data" : ("dataset" + (plural ? "s" : "")));
    } else if(entityType == "software") {
      return "software";
    } else if(entityType == "other") {
      return (full ? ("other research product" + (plural ? "s" : "")) : "other");
    }
  }
}