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import {Component, EventEmitter, Input, Output, ViewChild} from '@angular/core';
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import {ActivatedRoute} from '@angular/router';
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import {AdvancedField, Filter} from './searchUtils/searchHelperClasses.class';
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import {SearchDataprovidersService} from '../services/searchDataproviders.service';
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import {ErrorCodes} from '../utils/properties/errorCodes';
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import {ErrorMessagesComponent} from '../utils/errorMessages.component';
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import {SearchFields} from '../utils/properties/searchFields';
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import {SearchCustomFilter, SearchUtilsClass} from './searchUtils/searchUtils.class';
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import {EnvProperties} from '../utils/properties/env-properties';
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import {NewSearchPageComponent} from "./searchUtils/newSearchPage.component";
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import {DatasourcesHelperClass} from "./searchUtils/datasourcesHelper.class";
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import {properties} from "../../../environments/environment";
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@Component({
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    selector: 'search-dataproviders',
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    template: `
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    <new-search-page
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      pageTitle="{{(simpleView?'':'Advanced ')}} Find research {{ pageTitle }}"
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      entityType="dataprovider"
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      type="content providers"
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      [results]="results"
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      [searchUtils]="searchUtils"
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      [sortedByChanged]="searchUtils.sortBy" [resultsPerPageChanged]="searchUtils.size"
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      [fieldIds]="fieldIds" [fieldIdsMap]="fieldIdsMap" [selectedFields]="selectedFields"
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      [csvParams]="csvParams" csvPath="datasources"
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      [simpleSearchLink]="simpleSearchLink" [advancedSearchLink]="advancedSearchLink"
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      [disableForms]="disableForms"
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      [disableRefineForms]="disableRefineForms"
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      [loadPaging]="loadPaging"
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      [oldTotalResults]="oldTotalResults"
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      [openaireLink]=openaireLink
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      [includeOnlyResultsAndFilter]="includeOnlyResultsAndFilter"
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      [piwikSiteId]=piwikSiteId [hasPrefix]="hasPrefix"
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      [searchFormClass]="type!='deposit'?'datasourcesSearchForm':''"
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      [entitiesSelection]="type=='all'"  [showSwitchSearchLink]="showSwitchSearchLink"  
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      [filters]="filters"
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      [simpleView]="simpleView" formPlaceholderText="Search by name, description, subject..." 
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      [showResultCount]="(type=='all' || type == 'deposit')" [showIndexInfo]="type!='deposit'"
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      [tableViewLink]="tableViewLink"
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      [sort]="false" [showBreadcrumb]="showBreadcrumb" [basicMetaDescription]="metaDescription">
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    </new-search-page>
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<!--    [filters]="filters"-->
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    `
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 })
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export class SearchDataProvidersComponent {
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  private errorCodes: ErrorCodes;
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  private errorMessages: ErrorMessagesComponent;
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  @Input() piwikSiteId = null;
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  @Input() customFilter:SearchCustomFilter= null;
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  @Input() tableViewLink;
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  public results =[];
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  public filters =[];
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  public searchUtils:SearchUtilsClass = new SearchUtilsClass();
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  public searchFields:SearchFields = new SearchFields();
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  public fieldIds:  string[] = this.searchFields.DATASOURCE_ADVANCED_FIELDS;
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  public fieldIdsMap= this.searchFields.DATASOURCE_FIELDS;
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  public selectedFields:AdvancedField[] =  [];
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  public resourcesQuery = "(oaftype exact datasource)";
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  public csvParams: string;
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  public disableForms: boolean = false;
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  public disableRefineForms: boolean = false;
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  public loadPaging: boolean = true;
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  public oldTotalResults: number = 0;
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  public pagingLimit: number = 0;
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  public isPiwikEnabled;
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  properties:EnvProperties;
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  @Input() type: "all" | "registries" | "journals" | "compatible" | "deposit" = "all";
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  public refineFields: string[];
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  pageTitle;
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  @ViewChild(NewSearchPageComponent, { static: true }) searchPage: NewSearchPageComponent;
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  @Input() simpleView: boolean = true;
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  @Input() simpleSearchLink: string = "";
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  advancedSearchLink: string = "";
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  @Input() hasPrefix: boolean = true;
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  @Input() openaireLink: string;
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  @Input() includeOnlyResultsAndFilter: boolean = false;
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  @Output() searchPageUpdates = new EventEmitter();
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  @Input() showSwitchSearchLink:boolean;
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  @Input() showBreadcrumb: boolean = false;
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  subs: any[] = [];
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  searchResultsSub: any;
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  searchFiltersSub: any;
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  metaDescription = [];
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  constructor (private route: ActivatedRoute, private _searchDataProvidersService: SearchDataprovidersService ) {
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    this.results =[];
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    this.errorCodes = new ErrorCodes();
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    this.errorMessages = new ErrorMessagesComponent();
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    this.searchUtils.status = this.errorCodes.LOADING;
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  }
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  ngOnInit() {
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    this.refineFields = DatasourcesHelperClass.getrefineFields(this.type);
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    this.pageTitle = DatasourcesHelperClass.getTitle(this.type);
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    this.metaDescription = DatasourcesHelperClass.getDescription(this.type)
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    if(this.showSwitchSearchLink == null){
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      this.showSwitchSearchLink = (this.type == "all");
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    }
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    this.properties= properties;
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    if (!this.simpleSearchLink) {
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      this.simpleSearchLink = this.properties.searchLinkToDataProviders;
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    }        this.advancedSearchLink = this.properties.searchLinkToAdvancedDataProviders;
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    this.searchUtils.baseUrl = (this.simpleView)?this.simpleSearchLink:this.advancedSearchLink;
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     this.pagingLimit = properties.pagingLimit;
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     this.isPiwikEnabled = properties.enablePiwikTrack;
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    let firstLoad = true;
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    this.subs.push(this.route.queryParams.subscribe(params => {
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     this.loadPaging = true;
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     if(params['page'] && this.searchUtils.page != params['page']) {
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       this.loadPaging = false;
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       this.oldTotalResults = this.searchUtils.totalResults;
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     }
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     var refine = true;
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      if(this.searchPage.searchUtils.refineStatus == this.errorCodes.DONE) {
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        if (params['page'] != undefined && this.filters && !firstLoad && this.searchUtils.page != +params['page']) {
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          refine = false;
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        }
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        if (params['size'] != undefined && this.filters && !firstLoad && this.searchUtils.size != params['size']) {
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          refine = false;
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        }
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      }
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      let page = (params['page']=== undefined)?0:+params['page'];
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      this.searchUtils.page = ( page < 1 ) ? 1 : page;
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      this.searchUtils.size = (params['size']=== undefined)?10:+params['size'];
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      if(this.searchUtils.size != 5 && this.searchUtils.size != 10 && this.searchUtils.size != 20 && this.searchUtils.size != 50) {
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        this.searchUtils.size = 10;
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      }
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      this.searchPage.fieldIds = this.fieldIds;
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      this.selectedFields =[];
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      if(this.type == "deposit"){
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        this.searchPage.keywordFields = this.searchFields.DEPOSIT_DATASOURCE_KEYWORD_FIELDS;
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        this.searchPage.usedBy = "deposit";
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      }
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      // console.log(this.refineFields)
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      this.searchPage.prepareSearchPage(this.fieldIds, this.selectedFields, this.refineFields, [], this.fieldIdsMap,this.customFilter,params, "dataprovider");
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      if(refine && (this.type == "all" || this.type == "deposit")) {
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        this._getFilters(this.searchPage.getSearchAPIQueryForAdvancedSearhFields(), this.searchUtils.page, 0, true, this.searchPage.getSearchAPIQueryForRefineFields(params, firstLoad));
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      } else if(refine) { // static filters
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        this.searchUtils.refineStatus = this.errorCodes.LOADING;
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        this.filters = DatasourcesHelperClass.createFilters(this.type);
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      } else {
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        this.searchUtils.refineStatus = this.errorCodes.DONE;
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      }
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      this.getResults(this.searchPage.getSearchAPIQueryForAdvancedSearhFields(),  this.searchUtils.page, this.searchUtils.size, refine, this.searchPage.getSearchAPIQueryForRefineFields(params, firstLoad));
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      firstLoad = false;
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    }));
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  }
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  ngOnDestroy() {
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    if(this.searchResultsSub) {
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      this.searchResultsSub.unsubscribe();
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    }
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    if(this.searchFiltersSub) {
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      this.searchFiltersSub.unsubscribe();
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    }
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    for (let sub of this.subs) {
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      sub.unsubscribe();
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    }
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  }
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  public _getFilters(parameters:string, page: number, size: number, refine: boolean, refineFieldsFilterQuery = null){
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    if (page <= this.pagingLimit || this.searchUtils.refineStatus == this.errorCodes.LOADING) {
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      this.searchUtils.refineStatus = this.errorCodes.LOADING;
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      this.disableRefineForms = true;
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      this.searchPageUpdates.emit({disableForms: this.disableForms, disableRefineForms: this.disableRefineForms, searchUtils: this.searchUtils});
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      let datasourceQueryPrefix = DatasourcesHelperClass.getQueryPrefix(this.type);
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      this.searchFiltersSub = this._searchDataProvidersService.advancedSearchDataproviders( datasourceQueryPrefix +(datasourceQueryPrefix.length > 0 && parameters.length > 0 ?' and (':'') + parameters +(datasourceQueryPrefix.length > 0 && parameters.length > 0 ?' ) ':''),  page, size, this.properties, (refine && (this.type=="all" || this.type == "deposit")) ? this.searchPage.getRefineFieldsQuery() : null, this.searchPage.getFields(), refineFieldsFilterQuery, (this.type == "deposit"))
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      //.switchMap(
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        .subscribe(
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          data => {
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            let totalResults = data[0];
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            let filters = data[2];
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            this.filtersReturned(refine, filters, totalResults, page);
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          },
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          err => {
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            this.filters = this.searchPage.prepareFiltersToShow([], 0);
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            this.handleError("Error getting refine filters for content providers: ", err);
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            this.searchUtils.refineStatus = this.errorMessages.getErrorCode(err.status);
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            this.disableRefineForms = false;
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            this.searchPageUpdates.emit({disableForms: this.disableForms, disableRefineForms: this.disableRefineForms, searchUtils: this.searchUtils})
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          }
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        );
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    }
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  }
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  public filtersReturned(refine: boolean, filters: Filter[], totalResults, page: number) {
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    if (refine) {
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      this.filters = this.searchPage.prepareFiltersToShow(filters, totalResults);
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    }
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    this.searchUtils.refineStatus = this.errorCodes.DONE;
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    if(totalResults == 0) {
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      this.searchUtils.refineStatus = this.errorCodes.NONE;
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    }
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    if (this.searchUtils.refineStatus == this.errorCodes.DONE) {
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      // Page out of limit!!!
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      let totalPages: any = totalResults / (this.searchUtils.size);
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      if (!(Number.isInteger(totalPages))) {
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        totalPages = (parseInt(totalPages, 10) + 1);
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      }
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      if (totalPages < page) {
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        this.searchUtils.refineStatus = this.errorCodes.OUT_OF_BOUND;
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      }
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    }
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    if(this.searchUtils.refineStatus != this.errorCodes.DONE && this.searchUtils.status != this.searchUtils.refineStatus) {
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      if (this.searchResultsSub) {
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        this.searchResultsSub.unsubscribe();
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      }
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      this.resultsReturned(refine, [], totalResults, page);
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    }
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    this.disableRefineForms = false;
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    this.searchPageUpdates.emit({disableForms: this.disableForms, disableRefineForms: this.disableRefineForms, searchUtils: this.searchUtils})
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  }
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  public getResults(parameters:string, page: number, size: number, refine: boolean, refineFieldsFilterQuery = null){
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    if(page > this.pagingLimit ) {
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      size=0;
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    }
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    if(page <= this.pagingLimit  || this.searchUtils.status == this.errorCodes.LOADING) {
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      // if(parameters!= null && parameters != ''  ) {
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      //   this.csvParams ="&fq=( "+this.resourcesQuery + "and (" + parameters + "))";
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      // }else{
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      //   this.csvParams ="&fq="+this.resourcesQuery;
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      // }
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      // this.csvParams += (refineFieldsFilterQuery?refineFieldsFilterQuery:'');
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      this.csvParams = (parameters ? ("&fq=("+parameters) : "") + (parameters ? ")" : "");
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      this.csvParams += (refineFieldsFilterQuery ? refineFieldsFilterQuery : "");
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      //var errorCodes:ErrorCodes = new ErrorCodes();
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      this.searchUtils.status = this.errorCodes.LOADING;
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      //this.searchPage.openLoading();
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      this.disableForms = true;
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      this.searchPageUpdates.emit({disableForms: this.disableForms, disableRefineForms: this.disableRefineForms, searchUtils: this.searchUtils});
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      this.results = [];
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      this.searchUtils.totalResults = 0;
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      //console.info("Advanced Search for Content Providers: Execute search query "+parameters);
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      let datasourceQueryPrefix = DatasourcesHelperClass.getQueryPrefix(this.type);
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      //this._searchDataProvidersService.advancedSearchDataproviders( datasourceQueryPrefix +(datasourceQueryPrefix.length > 0 && parameters.length > 0 ?' and (':'') + parameters +(datasourceQueryPrefix.length > 0 && parameters.length > 0 ?' ) ':''),  page, size, this.properties, (refine && (this.type=="all" || this.type == "deposit")) ? this.searchPage.getRefineFieldsQuery() : null, this.searchPage.getFields(), refineFieldsFilterQuery, (this.type == "deposit")).subscribe(
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      this.searchResultsSub = this._searchDataProvidersService.advancedSearchDataproviders( datasourceQueryPrefix +(datasourceQueryPrefix.length > 0 && parameters.length > 0 ?' and (':'') + parameters +(datasourceQueryPrefix.length > 0 && parameters.length > 0 ?' ) ':''),  page, size, this.properties, null, this.searchPage.getFields(), refineFieldsFilterQuery, (this.type == "deposit")).subscribe(
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        data => {
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          let totalResults = data[0];
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          let results = data[1];
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          if(refine && !(this.type == "all" || this.type == "deposit")){
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            this.filtersReturned(refine, this.filters, totalResults, page);
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          }
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          this.resultsReturned(refine, results, totalResults, page);
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          },
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          err => {
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              //console.log(err);
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              this.handleError("Error getting content providers", err);
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              this.searchUtils.status = this.errorMessages.getErrorCode(err.status);
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              //TODO check erros (service not available, bad request)
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              // if( ){
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              //   this.searchUtils.status = errorCodes.ERROR;
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              // }
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              //var errorCodes:ErrorCodes = new ErrorCodes();
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              //this.searchUtils.status = errorCodes.NOT_AVAILABLE;
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              /*if(err.status == '404') {
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                this.searchUtils.status = this.errorCodes.NOT_FOUND;
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              } else if(err.status == '500') {
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                this.searchUtils.status = this.errorCodes.ERROR;
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              } else {
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                this.searchUtils.status = this.errorCodes.NOT_AVAILABLE;
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              }*/
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              //this.searchPage.closeLoading();
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              this.disableForms = false;
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            this.searchPageUpdates.emit({disableForms: this.disableForms, disableRefineForms: this.disableRefineForms, searchUtils: this.searchUtils});
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            this.searchPage.hideFilters = false;
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          }
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        );
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      }
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  }
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  public resultsReturned(refine: boolean, results: any, totalResults, page: number) {
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    this.searchUtils.totalResults = totalResults;
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    this.results = results;
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    if(!refine) {
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      this.searchPage.buildPageURLParameters(this.filters, [], false);
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    }
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    this.searchPage.hideFilters = false;
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    this.searchUtils.status = this.errorCodes.DONE;
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    if (this.searchUtils.totalResults == 0) {
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      this.searchUtils.status = this.errorCodes.NONE;
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    }
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    if (this.searchUtils.status == this.errorCodes.DONE) {
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      // Page out of limit!!!
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      let totalPages: any = this.searchUtils.totalResults / (this.searchUtils.size);
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      if (!(Number.isInteger(totalPages))) {
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        totalPages = (parseInt(totalPages, 10) + 1);
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      }
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      if (totalPages < page) {
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        this.searchUtils.totalResults = 0;
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        this.searchUtils.status = this.errorCodes.OUT_OF_BOUND;
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      }
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    }
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    if(this.searchUtils.status != this.errorCodes.DONE && this.searchUtils.refineStatus != this.searchUtils.status) {
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      if(this.searchFiltersSub) {
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        this.searchFiltersSub.unsubscribe();
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      }
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      this.filtersReturned(refine, [], totalResults, page);
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    }
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    this.disableForms = false;
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    this.searchPageUpdates.emit({disableForms: this.disableForms, disableRefineForms: this.disableRefineForms, searchUtils: this.searchUtils});
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  }
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  private handleError(message: string, error) {
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    console.error("Content Providers advanced Search Page: "+message, error);
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  }
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}
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