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

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

import {ErrorCodes} from '../../openaireLibrary/utils/properties/errorCodes';
import {ErrorMessagesComponent} from '../../openaireLibrary/utils/errorMessages.component';
import {SearchFields} from '../../openaireLibrary/utils/properties/searchFields';
import {SearchCustomFilter, SearchUtilsClass} from '../../openaireLibrary/searchPages/searchUtils/searchUtils.class';
import {EnvProperties} from '../../openaireLibrary/utils/properties/env-properties';
import {SearchCommunityProjectsService} from '../../openaireLibrary/connect/projects/searchProjects.service';
import {properties} from "../../../environments/environment";
import {CommunityService} from "../../openaireLibrary/connect/community/community.service";
import {Subscriber} from "rxjs";
import {NewSearchPageComponent} from "../../openaireLibrary/searchPages/searchUtils/newSearchPage.component";
import {SearchResult} from "../../openaireLibrary/utils/entities/searchResult";

@Component({
    selector: 'openaire-search-projects',
    template: `
 <new-search-page
  pageTitle="Search Projects"
  entityType="project"
  type="project"
  [results]="results"
  [searchUtils]="searchUtils"
  [sortedByChanged]="searchUtils.sortBy" 
  [fieldIds]="fieldIds" [fieldIdsMap]="fieldIdsMap" [selectedFields]="selectedFields"

  [simpleSearchLink]="properties.searchLinkToProjects"
  [disableForms]="disableForms"
  [disableRefineForms]="disableRefineForms"
  [loadPaging]="loadPaging"
  [oldTotalResults]="oldTotalResults"
  [openaireLink]="'https://' + (properties.environment == 'production'?'':'beta.') + 'explore.openaire.eu/search/find/projects'"
  [includeOnlyResultsAndFilter]="false"
  [hasPrefix]="false"
  searchFormClass="datasourcesTableSearchForm"      [entitiesSelection]="true"  [showSwitchSearchLink]="false"
  [filters]="filters"
  [simpleView]="true" formPlaceholderText="Search by name..."
  [showResultCount]="false" [showIndexInfo]="false" [showDownload]="false"
  [sort]="false" [showBreadcrumb]="true"
  [customFilter]=customFilter [searchForm]="{dark: false, class: 'search-form'}">
</new-search-page>
    `

})
export class OpenaireSearchProjectsComponent {
  private errorCodes: ErrorCodes;
  private errorMessages: ErrorMessagesComponent;
  public columnNames = ['Project', 'GrantId', 'Funder'];
  public results =[];
  public originalFilters =[];
  public filters =[];
  public searchUtils:SearchUtilsClass = new SearchUtilsClass();
  subscriptions = [];
  public searchFields:SearchFields = new SearchFields();
  public refineFields: string[] = ["funder"];
  properties:EnvProperties = properties;

  public disableForms: boolean = false;
  public enableSearchView: boolean = true;

  private communityId: string = '';
  customFilter: SearchCustomFilter = null;
  initialLoad = true;
  public allResults =[];
  @ViewChild(NewSearchPageComponent, { static: true }) searchPage: NewSearchPageComponent;
  public fieldIds:  string[] = this.searchFields.PROJECT_ADVANCED_FIELDS;
  public fieldIdsMap= this.searchFields.PROJECT_FIELDS;
  public selectedFields:AdvancedField[] =  [];
  public disableRefineForms: boolean = false;
  public loadPaging: boolean = true;
  public oldTotalResults: number = 0;
  keyword;
  constructor (private route: ActivatedRoute, private _searchProjectsService: SearchCommunityProjectsService,  private _communityService: CommunityService) {
    this.errorCodes = new ErrorCodes();
    this.errorMessages = new ErrorMessagesComponent();
    this.searchUtils.status = this.errorCodes.LOADING;
  }

  public ngOnInit() {
    this.searchUtils.baseUrl = this.properties.searchLinkToProjects;
     this.subscriptions.push(this._communityService.getCommunityAsObservable().subscribe(community =>{
        if(community != null){
          this.communityId = community.communityId;
          this.customFilter = new SearchCustomFilter("Community", "communityId", this.communityId, community.shortTitle);
          this.subscriptions.push(this.route.queryParams.subscribe(params => {
            let page = (params['page'] === undefined) ? 1 : +params['page'];
            this.searchUtils.page = (page <= 0) ? 1 : page;
            this.searchUtils.validateSize(params['size']);

            this.keyword = decodeURIComponent(params['fv0']?params['fv0']:(params['keyword']?params['keyword']:''));
            this.selectedFields = [];
            this.searchPage.prepareSearchPage(this.fieldIds, this.selectedFields, this.refineFields, [], this.fieldIdsMap, this.customFilter, params, "project");
            if(this.initialLoad) {
              this.initialLoad = false;
              this._getResults();
            }else{
              this._getResults();
            }
          }));
        }
    }));
  }

  public ngOnDestroy() {
    this.subscriptions.forEach(subscription => {
      if (subscription instanceof Subscriber) {
        subscription.unsubscribe();
      }
    });
  }
    private _getResults(){
      this.results = [];
      this.searchUtils.totalResults = 0;
      this.searchUtils.refineStatus = this.errorCodes.LOADING;
      this.searchUtils.status = this.errorCodes.LOADING;
      this.disableForms = true;
      this.disableRefineForms = true;
      this.enableSearchView = false;
      if(this.allResults) {
        this.subscriptions.push(this._searchProjectsService.searchProjects(this.properties, this.communityId).subscribe(
          data => {
            this.originalFilters = this.createFilters(data).slice(); //copy array
            this.allResults = this.parseResults(data);
            this.filters = this.searchPage.prepareFiltersToShow(this.originalFilters, this.allResults.length);
            this.filterResults();
          },
          err => {
            this.handleError("Error getting projects for community with id: " + this.communityId, err);
            this.searchUtils.status = this.errorMessages.getErrorCode(err.status);
            this.enableSearchView = true;
          }
        ));
      }else{
        this.filters = this.searchPage.prepareFiltersToShow(this.originalFilters, this.allResults.length);
        this.filterResults();
      }
    }


  private createFilters(data):Filter[] {
    let length = Array.isArray(data) ? data.length : 1;

    var filter_names=["Funder"];
    var filter_ids=["funder"];
     var filter_original_ids = ["funder"];

    var value_names=[];
    var value_original_ids=[];

    var funders = new Set<String>();
    var value_name = [];
    var value_original_id = [];
    let i;
    for(i=0; i<length; i++) {
      let resData = Array.isArray(data) ? data[i] : data;
      if(resData.funder && !funders.has(resData.funder)) {
        funders.add(resData.funder);
        value_name.push(resData.funder);
        value_original_id.push(resData.funder.trim());
      }
    }
    value_names.push(value_name);
    value_original_ids.push(value_original_id);

    var filters: Filter[] =[];
    for(i =0 ; i < filter_names.length;i++){
      if(value_names[i].length > 0) {
        var values: Value[] = [];
        for (var j = 0; j < value_names[i].length; j++) {
          var value: Value = {name: value_names[i][j], id: value_original_ids[i][j], number: j, selected: false}
          values.push(value);
        }
        var filter: Filter = {
          title: filter_names[i],
          filterId: filter_ids[i],
          originalFilterId: filter_original_ids[i],
          values: values,
          countSelectedValues: 0,
          "filterOperator": 'or',
          valueIsExact: true,
          filterType: "checkbox"
        };
        filters.push(filter);
      }
    }
    return filters;
  }

  parseResults(data){
    let results:SearchResult[]=[];
    for(let result of data){
      let sResult:SearchResult = new SearchResult();
      sResult.id = result.openaireId;
      sResult.title = {name:"", accessMode: null};
      sResult.title.name = result.name?result.name:result.acronym;
      sResult.acronym = result['acronym'];
      sResult.code = result['grantId'];
      sResult['funderShortname'] = result['funder'];
      results.push(sResult);
    }
    return results;
  }
  filterResults(){
    let results = this.allResults.filter(value => { return value.title.name && value.title.name.toLowerCase().indexOf(this.keyword.toLowerCase()) !=-1 ||  value.acronym && value.acronym.toLowerCase().indexOf(this.keyword.toLowerCase()) !=-1});
    let funderFilterValues = [];
    for(let filter of this.filters){
      if(filter.countSelectedValues > 0){
        for(let value of filter.values){
          if(value.selected) {
            funderFilterValues.push(value.name);
          }
        }
      }
    }
    if(funderFilterValues.length > 0) {
      results = results.filter(value => {
        return funderFilterValues.indexOf(value.funderShortname) != -1
      });
    }
    this.oldTotalResults = results.length;
    this.searchUtils.totalResults = results.length;     
    this.results = results.slice((this.searchUtils.page - 1) * this.searchUtils.size, this.searchUtils.page *this.searchUtils.size );
    this.searchUtils.status = this.results.length == 0 ? this.errorCodes.NONE:  this.errorCodes.DONE;
    this.disableForms = false;
    this.disableRefineForms = false;
    this.enableSearchView = true;
    this.searchUtils.refineStatus = this.errorCodes.DONE;
  }
  private handleError(message: string, error) {
    console.error("Projects simple Search Page: "+message, error);
  }
}