import {ChangeDetectorRef, Component, EventEmitter, Input, Output, ViewChild} from '@angular/core';
import {ActivatedRoute} from '@angular/router';
import {AdvancedField, Filter} from './searchUtils/searchHelperClasses.class';
import {SearchProjectsService} from '../services/searchProjects.service';
import {ErrorCodes} from '../utils/properties/errorCodes';
import {ErrorMessagesComponent} from '../utils/errorMessages.component';
import {OpenaireEntities, SearchFields} from '../utils/properties/searchFields';
import {SearchCustomFilter, SearchUtilsClass} from './searchUtils/searchUtils.class';
import {EnvProperties} from '../utils/properties/env-properties';
import {NewSearchPageComponent, SearchForm} from "./searchUtils/newSearchPage.component";
import {RangeFilter} from "../utils/rangeFilter/rangeFilterHelperClasses.class";
import {properties} from "../../../environments/environment";
import {RefineFieldResultsService} from "../services/refineFieldResults.service";
import {zip} from "rxjs";

@Component({
  selector: 'search-projects',
  template: `
    <new-search-page
        pageTitle="{{(simpleView?'':'Advanced ')}} Search for {{ openaireEntities.PROJECTS | titlecase }}"
        entityType="project"
        [type]="openaireEntities.PROJECTS"
        [results]="results"
        [searchUtils]="searchUtils"
        [sortedByChanged]="searchUtils.sortBy"
        [fieldIds]="fieldIds" [fieldIdsMap]="fieldIdsMap" [selectedFields]="selectedFields"
        [csvParams]="csvParams" [csvPath]="openaireEntities.PROJECTS_FILE"
        [simpleSearchLink]="simpleSearchLink" [advancedSearchLink]="advancedSearchLink"
        [disableForms]="disableForms"
        [disableRefineForms]="disableRefineForms"
        [loadPaging]="loadPaging"
        [oldTotalResults]="oldTotalResults"
        [openaireLink]=openaireLink [hasPrefix]="hasPrefix"
        [searchForm]="searchForm"
        [includeOnlyResultsAndFilter]="includeOnlyResultsAndFilter"
        [filters]="filters"
        [rangeFilters]="rangeFilters" [rangeFields]="rangeFields"
        [simpleView]="simpleView" formPlaceholderText="Search by title, acronym, project code..."
        [showSwitchSearchLink]="showSwitchSearchLink"
        [sort]="false" [showBreadcrumb]="showBreadcrumb"
        (filterRequestAll)="filterRequestedAll($event)">
    </new-search-page>
  
  `
})

export class SearchProjectsComponent {
  private errorCodes: ErrorCodes;
  private errorMessages: ErrorMessagesComponent;
  @Input() customFilters: SearchCustomFilter[] = null;
  @Input()
  set customFilter(customFilter: SearchCustomFilter | SearchCustomFilter[]) {
    if(!Array.isArray(customFilter)) {
      this.customFilters = customFilter?[customFilter]:null;
    }else{
      this.customFilters = customFilter;
    }
  }  @Input() searchForm: SearchForm = {class: 'search-form', dark: true};
  public results = [];
  public filters = [];
  public rangeFilters: RangeFilter[] = [];
  
  public searchUtils: SearchUtilsClass = new SearchUtilsClass();
  public searchFields: SearchFields = new SearchFields();
  
  public fieldIds: string[] = this.searchFields.PROJECT_ADVANCED_FIELDS;
  public fieldIdsMap = this.searchFields.PROJECT_FIELDS;
  public rangeFields: string[][] = this.searchFields.PROJECT_RANGE_FIELDS;
  public selectedFields: AdvancedField[] = [];
  properties: EnvProperties;
  public openaireEntities = OpenaireEntities;

  public resourcesQuery = "(oaftype exact project)";
  public csvParams: string;
  public disableForms: boolean = false;
  public disableRefineForms: boolean = false;
  public loadPaging: boolean = true;
  public oldTotalResults: number = 0;
  public pagingLimit: number = 0;
  public refineFields: string[] = this.searchFields.PROJECT_REFINE_FIELDS;
  @ViewChild(NewSearchPageComponent, {static: true}) searchPage: NewSearchPageComponent;
  @Input() simpleView: boolean = true;
  @Input() simpleSearchLink: string = "";
  advancedSearchLink: string = "";
  @Input() hasPrefix: boolean = true;
  @Input() openaireLink: string = null;
  @Input() includeOnlyResultsAndFilter: boolean = false;
  @Output() searchPageUpdates = new EventEmitter();
  @Input() showSwitchSearchLink: boolean = true;
  @Input() showBreadcrumb: boolean = false;
  subs: any[] = [];
  searchResultsSub: any;
  searchFiltersSub: any;

  private refineQuery: string = "";

  constructor(private route: ActivatedRoute, private _searchProjectsService: SearchProjectsService,
              private _refineFieldsResultsService: RefineFieldResultsService,
              private cdr: ChangeDetectorRef) {
    this.results = [];
    this.errorCodes = new ErrorCodes();
    this.errorMessages = new ErrorMessagesComponent();
    this.searchUtils.status = this.errorCodes.LOADING;
    this.searchUtils.refineStatus = this.errorCodes.LOADING;

    this.searchFields.sortFieldsByName(this.fieldIds, this.fieldIdsMap);
  }
  
  ngOnInit() {
    
    this.properties = properties;
    if (!this.simpleSearchLink) {
      this.simpleSearchLink = this.properties.searchLinkToProjects;
    }
    this.advancedSearchLink = this.properties.searchLinkToAdvancedProjects;
    this.searchUtils.baseUrl = (this.simpleView) ? this.simpleSearchLink : this.advancedSearchLink;
    this.pagingLimit = properties.pagingLimit;
    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.searchPage.searchUtils.refineStatus == this.errorCodes.DONE) {
        if (params['page'] != undefined && this.filters && !firstLoad && this.searchUtils.page != +params['page']) {
          refine = false;
        }
        
        if (params['size'] != undefined && this.filters && !firstLoad && this.searchUtils.size != params['size']) {
          refine = false;
        }
      }
      let page = (params['page'] === undefined) ? 1 : +params['page'];
      this.searchUtils.page = (page <= 0) ? 1 : page;
      
      this.searchUtils.validateSize(params['size']);
      
      this.searchPage.fieldIds = this.fieldIds;
      this.selectedFields = [];
      this.searchPage.prepareSearchPage(this.fieldIds, this.selectedFields, this.refineFields, this.rangeFields,[], this.fieldIdsMap, this.customFilters, params, "project");
      if (refine) {
        this._getFilters(this.searchPage.getSearchAPIQueryForAdvancedSearhFields(), this.searchUtils.page, 0, "", true, this.searchPage.getSearchAPIQueryForRangeFields(params) + this.searchPage.getSearchAPIQueryForRefineFields(params, firstLoad));
      } else {
        this.searchUtils.refineStatus = this.errorCodes.DONE;
      }
      this.getResults(this.searchPage.getSearchAPIQueryForAdvancedSearhFields(), this.searchUtils.page, this.searchUtils.size, refine, this.searchPage.getSearchAPIQueryForRangeFields(params) + this.searchPage.getSearchAPIQueryForRefineFields(params, firstLoad));
      firstLoad = false;

      this.refineQuery = this.searchPage.getSearchAPIQueryForRangeFields(params)+this.searchPage.getSearchAPIQueryForRefineFields(params, firstLoad);
    }));
  }
  
  ngOnDestroy() {
    if (this.searchResultsSub) {
      this.searchResultsSub.unsubscribe();
    }
    if (this.searchFiltersSub) {
      this.searchFiltersSub.unsubscribe();
    }
    for (let sub of this.subs) {
      sub.unsubscribe();
    }
  }
  
  public _getFilters(parameters: string, page: number, size: number, sortBy: string, refine: boolean, refineFieldsFilterQuery = null) {
    if (page <= this.pagingLimit || this.searchUtils.refineStatus == this.errorCodes.LOADING) {
      this.searchUtils.refineStatus = this.errorCodes.LOADING;
      this.disableRefineForms = true;
      this.searchPageUpdates.emit({
        disableForms: this.disableForms,
        disableRefineForms: this.disableRefineForms,
        searchUtils: this.searchUtils
      });

      let filterQueries;
      let filterIds = [];
      let fields = this.searchPage.getFields();
      for(let filter of this.searchPage.URLCreatedFilters) {
        filterIds.push(filter.filterId);
        fields = fields.filter(field => field != filter.filterId);
      }

      if(filterIds.length > 0) {
        filterQueries = zip(this._searchProjectsService.advancedSearchProjects(parameters, page, size, this.properties, (refine) ? this.searchPage.getRefineFieldsQuery(filterIds) : null, filterIds, refineFieldsFilterQuery, false),
          this._searchProjectsService.advancedSearchProjects(parameters, page, size, this.properties, (refine) ? this.searchPage.getRefineFieldsQuery(fields) : null, fields, refineFieldsFilterQuery, true)
        );
      } else {
        filterQueries = this._searchProjectsService.advancedSearchProjects(parameters, page, size, this.properties, (refine) ? this.searchPage.getRefineFieldsQuery(fields) : null, fields, refineFieldsFilterQuery, true)
      }

      this.searchFiltersSub = filterQueries.subscribe(
        data => {
          let totalResults = filterIds.length > 0 ? data[0][0] : data[0];
          let filters = filterIds.length > 0 ? data[0][2].concat(data[1][2]) : data[2];

          this.filtersReturned(refine, filters, totalResults, page);
        },
        err => {
          this.filters = this.searchPage.prepareFiltersToShow([], 0);
          this.rangeFilters = this.searchPage.prepareRangeFiltersToShow();

          this.handleError("Error getting refine filters for projects: ", err);
          this.searchUtils.refineStatus = this.errorMessages.getErrorCode(err.status);

          this.disableRefineForms = false;
          this.searchPageUpdates.emit({
            disableForms: this.disableForms,
            disableRefineForms: this.disableRefineForms,
            searchUtils: this.searchUtils
          })
        }
      );
    }
  }
  
  
  public filtersReturned(refine: boolean, filters: Filter[], totalResults, page: number) {
    if (refine) {
      this.filters = this.searchPage.prepareFiltersToShow(filters, totalResults);
      this.rangeFilters = this.searchPage.prepareRangeFiltersToShow();
    }
    
    this.searchUtils.refineStatus = this.errorCodes.DONE;
    if (totalResults == 0) {
      this.searchUtils.refineStatus = this.errorCodes.NONE;
    }
    
    if (this.searchUtils.refineStatus == this.errorCodes.DONE) {
      // Page out of limit!!!
      let totalPages: any = totalResults / (this.searchUtils.size);
      if (!(Number.isInteger(totalPages))) {
        totalPages = (parseInt(totalPages, 10) + 1);
      }
      if (totalPages < page) {
        this.searchUtils.refineStatus = this.errorCodes.OUT_OF_BOUND;
      }
    }
    
    if (this.searchUtils.refineStatus != this.errorCodes.DONE && this.searchUtils.status != this.searchUtils.refineStatus) {
      if (this.searchResultsSub) {
        this.searchResultsSub.unsubscribe();
      }
      this.resultsReturned(refine, [], totalResults, page);
    }
    
    this.disableRefineForms = false;
    this.searchPageUpdates.emit({
      disableForms: this.disableForms,
      disableRefineForms: this.disableRefineForms,
      searchUtils: this.searchUtils
    })
  }
  
  public getResults(parameters: string, page: number, size: number, 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 += (refineFieldsFilterQuery?refineFieldsFilterQuery:'');
      //
      // //var errorCodes:ErrorCodes = new ErrorCodes();
      
      this.csvParams = (parameters ? ("&fq=(" + parameters) : "") + (parameters ? ")" : "");
      this.csvParams += (refineFieldsFilterQuery ? refineFieldsFilterQuery : "");
      
      this.searchUtils.status = this.errorCodes.LOADING;
      //this.searchPage.openLoading();
      this.disableForms = true;
      this.searchPageUpdates.emit({
        disableForms: this.disableForms,
        disableRefineForms: this.disableRefineForms,
        searchUtils: this.searchUtils
      });
      this.results = [];
      this.searchUtils.totalResults = 0;
      
      //console.info("Advanced Search for Publications: Execute search query "+parameters);
      this.searchResultsSub = this._searchProjectsService.advancedSearchProjects(parameters, page, size, this.properties, null, this.searchPage.getFields(), refineFieldsFilterQuery).subscribe(
        //this._searchProjectsService.advancedSearchProjects(parameters,  page, size, this.properties,(refine) ? this.searchPage.getRefineFieldsQuery() : null, this.searchPage.getFields(), refineFieldsFilterQuery).subscribe(
        data => {
          let totalResults = data[0];
          let results = data[1];
          this.resultsReturned(refine, results, totalResults, page);
        },
        err => {
          //console.log(err);
          this.handleError("Error getting projects", err);
          this.searchUtils.status = this.errorMessages.getErrorCode(err.status);
          //this.searchUtils.totalResults = null;
          //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,
            disableRefineForms: this.disableRefineForms,
            searchUtils: this.searchUtils
          })
          this.searchPage.hideFilters = false;
        }
      );
    }
  }
  
  public resultsReturned(refine: boolean, results: any, totalResults, page: number) {
    this.searchUtils.totalResults = totalResults;
    this.results = results;
    if (!refine) {
      this.searchPage.buildPageURLParameters(this.filters, this.rangeFilters,  [], false);
    }
    
    this.searchPage.hideFilters = false;
    
    this.searchUtils.status = this.errorCodes.DONE;
    if (this.searchUtils.totalResults == 0) {
      this.searchUtils.status = this.errorCodes.NONE;
    }
    
    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;
      }
    }
    
    if (this.searchUtils.status != this.errorCodes.DONE && this.searchUtils.refineStatus != this.searchUtils.status) {
      if (this.searchFiltersSub) {
        this.searchFiltersSub.unsubscribe();
      }
      this.filtersReturned(refine, [], totalResults, page);
    }
    
    this.disableForms = false;
    this.searchPageUpdates.emit({
      disableForms: this.disableForms,
      disableRefineForms: this.disableRefineForms,
      searchUtils: this.searchUtils
    })
  }
  
  private handleError(message: string, error) {
    console.error("Projects advanced Search Page: " + message, error);
  }

  public filterRequestedAll(oldFilter: Filter) {
    let fieldsStr: string = "&fields=" + oldFilter.filterId+"&refine=true";

    this.searchFiltersSub = this._searchProjectsService.advancedSearchProjects(this.searchPage.getSearchAPIQueryForAdvancedSearhFields(), 1, 0, properties, fieldsStr, [oldFilter.filterId], this.refineQuery).subscribe(
    // this.searchFiltersSub = this._refineFieldsResultsService.getAllRefineFieldResultsByFieldName(oldFilter.filterId, "project", this.properties, this.refineQuery).subscribe(
      res => {
        let filter: Filter = res[2][0];
        if(filter.values.length == 0) {
          filter = oldFilter;
          filter.countAllValues = 0;
        } else {
          filter.countAllValues = filter.values.length;
          // console.log(filter);
          for (let value of filter.values) {
            for (let oldValue of oldFilter.values) {
              if (oldValue.id == value.id && oldValue.selected) {
                value.selected = true;
                break;
              }
            }
          }
        }

        let index: number = this.filters.findIndex((fltr: Filter) => fltr.filterId == filter.filterId);
        filter.isViewAllOpen = true;
        this.filters[index] = filter;
        this.cdr.detectChanges();
      },
      error => {
        let index: number = this.filters.findIndex((fltr: Filter) => fltr.filterId == oldFilter.filterId);
        oldFilter.countAllValues = 0;
        this.filters[index] = oldFilter;
        this.cdr.detectChanges();
      }
    )
  }
}