import {Component, EventEmitter, Input, OnChanges, Output, SimpleChanges, ViewChild} from '@angular/core';
import {ActivatedRoute} from '@angular/router';
import {AdvancedField, Filter} from './searchUtils/searchHelperClasses.class';
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 {SearchCustomFilter, SearchUtilsClass} from './searchUtils/searchUtils.class';
import {EnvProperties} from '../utils/properties/env-properties';
import {NewSearchPageComponent} from "./searchUtils/newSearchPage.component";
import {RangeFilter} from "../utils/rangeFilter/rangeFilterHelperClasses.class";


@Component({
  selector: 'search-research-results',
  template: `    
    <new-search-page
      pageTitle="{{(simpleView?'':'Advanced ')}} Search for {{ getEntityName(resultType, true, true) | titlecase }}"
      [entityType]="resultType"
      [type]="getEntityName(resultType, true, true)"
      [results]="results"
      [searchUtils]="searchUtils"
      [fieldIds]="fieldIds" [fieldIdsMap]="fieldIdsMap" [selectedFields]="selectedFields"
      [csvParams]="csvParams" [csvPath]="getEntityName(resultType, true, false)"
      [simpleSearchLink]="simpleSearchLink" [advancedSearchLink]="advancedSearchLink"
      [disableForms]="disableForms"
      [loadPaging]="loadPaging"
      [oldTotalResults]="oldTotalResults"
      [openaireLink]=openaireLink
      [piwikSiteId]=piwikSiteId [hasPrefix]="hasPrefix"
      searchFormClass="publicationsSearchForm"
      [sort]=sort
      [filters]="filters" [quickFilter]="quickFilter"
      [rangeFilters]="rangeFilters" [rangeFields]="rangeFields"
      [simpleView]="simpleView" formPlaceholderText="Search by title, author, abstract, DOI, orcid..."
      [includeOnlyResultsAndFilter]="includeOnlyResultsAndFilter"
    >
    </new-search-page>

  `
})

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

  @Input() simpleSearchLink: string = "";
  advancedSearchLink: string = "";

  private errorCodes: ErrorCodes;
  private errorMessages: ErrorMessagesComponent;
  @Input() piwikSiteId = null;
  @Input() hasPrefix: boolean = true;
  public results = [];
  public filters = [];
  public rangeFilters: RangeFilter[] = [];

  public searchUtils: SearchUtilsClass = new SearchUtilsClass();
  public searchFields: SearchFields = new SearchFields();

  public fieldIds: string[] = this.searchFields.RESULT_ADVANCED_FIELDS;
  public fieldIdsMap = this.searchFields.RESULT_FIELDS;
  public rangeFields:string[][] = this.searchFields.RESULT_RANGE_FIELDS;
  public selectedFields: AdvancedField[] = [];
  public resourcesQuery = "((oaftype exact result) and (resulttypeid exact " + this.resultType + "))";
  public csvParams: string;
  public disableForms: boolean = false;
  public loadPaging: boolean = true;
  public oldTotalResults: number = 0;
  @Input() openaireLink: string;
  @Input() customFilter: SearchCustomFilter = null;
  public pagingLimit: number = 0;
  public isPiwikEnabled;
  public sort: boolean = true;
  properties: EnvProperties;
  public refineFields: string[] = this.searchFields.RESULT_REFINE_FIELDS;
  @ViewChild(NewSearchPageComponent) searchPage: NewSearchPageComponent;
  @Input() simpleView: boolean = true;
  quickFilter: { filter: Filter, selected: boolean, filterId: string, value: string } = {
    filter: null,
    selected: true,
    filterId: "resultbestaccessright",
    value: "Open Access"
  };
  @Input() includeOnlyResultsAndFilter: boolean = false;
  @Output() searchPageUpdates = new EventEmitter();
  subs: any[]=[];
  constructor(private route: ActivatedRoute, private _searchResearchResultsService: SearchResearchResultsService) {
    this.results = [];
    this.errorCodes = new ErrorCodes();
    this.errorMessages = new ErrorMessagesComponent();
    this.searchUtils.status = this.errorCodes.LOADING;
  }

  ngOnInit() {
    //TODO add checks about which result types are enabled!
    this.subs.push(this.route.data.subscribe((data: { envSpecific: EnvProperties }) => {
      this.properties = data.envSpecific;
      this.pagingLimit = data.envSpecific.pagingLimit;
      this.isPiwikEnabled = data.envSpecific.enablePiwikTrack;

      if (!this.simpleSearchLink) {
        this.simpleSearchLink = this.properties.searchLinkToResults;
      }
      this.advancedSearchLink = this.properties.searchLinkToAdvancedResults;
      this.searchUtils.baseUrl = (this.simpleView) ? this.simpleSearchLink : this.advancedSearchLink;

    }));

    this.searchUtils.status = this.errorCodes.LOADING;
    var firstLoad = true;
    this.subs.push(this.route.queryParams.subscribe(params => {
      this.loadPaging = true;
      if (params['page'] && this.searchUtils.page != params['page']) {
        this.loadPaging = false;
        this.oldTotalResults = this.searchUtils.totalResults;
      }
      var refine = true;
      if (this.searchUtils.page != ((params['page'] === undefined) ? 1 : +params['page']) && this.filters && !firstLoad) {
        refine = false;

      }
      let page = (params['page'] === undefined) ? 1 : +params['page'];
      this.searchUtils.page = (page <= 0) ? 1 : 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.selectedFields = [];
      this.searchPage.prepareSearchPage(this.fieldIds, this.selectedFields, this.refineFields, this.rangeFields, this.fieldIdsMap,this.customFilter,params, this.resultType, this.quickFilter);
      this._getResults(this.searchPage.getSearchAPIQueryForAdvancedSearhFields(), this.searchUtils.page, this.searchUtils.size, this.searchUtils.sortBy, refine, this.searchPage.getSearchAPIQueryForRangeFields(params)+this.searchPage.getSearchAPIQueryForRefineFields(params, firstLoad));
      firstLoad = false;
    }));
  }

  ngOnDestroy() {
    for(let sub of this.subs){
      sub.unsubscribe();
    }
  }

  public _getResults(parameters: string, page: number, size: number, sortBy: string, refine: boolean, refineFieldsFilterQuery = null) {
    if (page > this.pagingLimit) {
      size = 0;
    }
    if (page <= this.pagingLimit || this.searchUtils.status == this.errorCodes.LOADING) {
      // if (parameters != null && parameters != '') {
      //   this.csvParams = "&fq=(" + this.resourcesQuery + " and (" + parameters + "))";
      // } else {
      //   this.csvParams = "&fq=" + this.resourcesQuery;
      // }
      this.csvParams = (parameters ? ("&fq=("+parameters) : "") + (parameters ? ")" : "");
      this.csvParams += (refineFieldsFilterQuery ? refineFieldsFilterQuery : "");

      this.searchUtils.status = this.errorCodes.LOADING;
      this.disableForms = true;
      this.searchPageUpdates.emit({disableForms: this.disableForms,searchUtils: this.searchUtils});
      this.results = [];
      this.searchUtils.totalResults = 0;
      this.subs.push(this._searchResearchResultsService.advancedSearchResults(this.resultType, parameters, page, size, sortBy, this.properties, (refine) ? this.searchPage.getRefineFieldsQuery() : null, this.searchPage.getFields(), refineFieldsFilterQuery)
        .subscribe(
        data => {
          this.searchUtils.totalResults = data[0];
          this.results = data[1];
          if (refine) {
            this.filters = this.searchPage.prepareFiltersToShow(data[2],this.searchUtils.totalResults);
            this.rangeFilters = this.searchPage.prepareRangeFiltersToShow();
          } else {
            this.searchPage.buildPageURLParameters(this.filters, this.rangeFilters, false);
          }

          this.searchUtils.status = this.errorCodes.DONE;
          if (this.searchUtils.totalResults == 0) {
            this.searchUtils.status = this.errorCodes.NONE;
          }
          this.disableForms = false;
          this.searchPageUpdates.emit({disableForms: this.disableForms, searchUtils: this.searchUtils})

          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 => {
          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.NOT_AVAILABLE;
          /*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;
          this.searchPageUpdates.emit({disableForms: this.disableForms, searchUtils: this.searchUtils})

        }
      ));
    }
  }

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

  public 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");
    } else if (entityType == "result") {
      return (full ? ("research outcome" + (plural ? "s" : "")) : "result");
    }
  }
}