import {Component, EventEmitter, Input, Output, ViewChild} from '@angular/core';
import {Location} from '@angular/common';
import {ActivatedRoute, Router} from '@angular/router';
import {Meta, Title} from '@angular/platform-browser';

import {AdvancedField} from '../searchUtils/searchHelperClasses.class';
import {SearchCustomFilter, SearchUtilsClass} from './searchUtils.class';
import {ModalLoading} from '../../utils/modal/loading.component';
import {Dates, StringUtils} from '../../utils/string-utils.class';
import {ErrorCodes} from '../../utils/properties/errorCodes';
import {RouterHelper} from '../../utils/routerHelper.class';

import {PiwikService} from '../../utils/piwik/piwik.service';
import {EnvProperties} from '../../utils/properties/env-properties';
import {SEOService} from '../../sharedComponents/SEO/SEO.service';
import {HelperService} from "../../utils/helper/helper.service";

@Component({
  selector: 'advanced-search-page',
  templateUrl: 'advancedSearchPage.component.html'
})
export class AdvancedSearchPageComponent {
  @Input() piwikSiteId = null;
  @Input() hasPrefix: boolean = true;
  @Input() pageTitle = "";
  @Input() results = [];
  @Input() type;
  @Input() entityType;
  @Input() searchUtils: SearchUtilsClass = new SearchUtilsClass();
  @Input() fieldIds: string[];
  @Input() fieldIdsMap;//:{ [key:string]:{ name:string, operator:string, type:string, indexField:string, equalityOperator:string  }} ;
  @Input() selectedFields: AdvancedField[];
  @Input() simpleSearchUrl: string;
  @ViewChild(ModalLoading) loading: ModalLoading;
  @Input() csvParams: string;
  @Input() csvPath: string;
  @Input() simpleSearchLink: string = "";
  @Input() disableForms: boolean = false;
  @Input() loadPaging: boolean = true;
  @Input() oldTotalResults: number = 0;
  @Input() openaireLink: string;
  @Input() customFilter: SearchCustomFilter = null;
  @Input() sort: boolean = false;
  @Input() searchFormClass: string = "searchForm";
  piwiksub: any;
  public parameterNames: string[] = [];
  public parameterValues: string[] = [];

  public baseURLWithParameters: string = '';

  public csvLimit: number = 0;
  public pagingLimit: number = 0;
  public resultsPerPage: number = 0;
  isPiwikEnabled = false;
  properties: EnvProperties;
  public pageContents = null;
  public divContents = null;
  public routerHelper: RouterHelper = new RouterHelper();
  public errorCodes: ErrorCodes = new ErrorCodes();

  url = null;

  constructor(private route: ActivatedRoute,
              private location: Location,
              private _meta: Meta,
              private _title: Title,
              private _piwikService: PiwikService,
              private router: Router,
              private seoService: SEOService,
              private helper: HelperService) {
  }

  ngOnInit() {
    this.route.data
      .subscribe((data: { envSpecific: EnvProperties }) => {
        this.properties = data.envSpecific;
        //this.getDivContents();
        this.getPageContents();
        this.pagingLimit = data.envSpecific.pagingLimit;
        this.resultsPerPage = data.envSpecific.resultsPerPage;
        this.csvLimit = data.envSpecific.csvLimit;
        this.isPiwikEnabled = data.envSpecific.enablePiwikTrack;
        if (typeof window !== 'undefined') {
          this.updateUrl(data.envSpecific.baseLink + location.pathname);
          this.url = data.envSpecific.baseLink + location.pathname
        }
        if (typeof document !== 'undefined' && this.isPiwikEnabled) {
          this.piwiksub = this._piwikService.trackView(this.properties, this.pageTitle, this.piwikSiteId).subscribe();
        }
      });

    var description = "Openaire, search, repositories, open access, type, content provider, funder, project, " + this.pageTitle;

    this.updateTitle(this.pageTitle);
    this.updateDescription(description);

    this.searchUtils.baseUrl = "/" + this.searchUtils.baseUrl;

    this.updateBaseUrlWithParameters();
    this.seoService.createLinkForCanonicalURL(this.properties.baseLink + this.router.url, false);


  }

  private getPageContents() {
    this.helper.getPageHelpContents(this.router.url, this.properties, (this.customFilter)?this.customFilter.valueId:null).subscribe(contents => {

      this.pageContents = contents;
    })
  }

  private getDivContents() {
    this.helper.getDivHelpContents(this.router.url, this.properties, (this.customFilter)?this.customFilter.valueId:null).subscribe(contents => {
      this.divContents = contents;
    })
  }

  ngOnDestroy() {
    if (this.piwiksub) {
      this.piwiksub.unsubscribe();
    }
  }

  updateDescription(description: string) {
    this._meta.updateTag({content: description}, "name='description'");
    this._meta.updateTag({content: description}, "property='og:description'");
  }

  updateTitle(title: string) {
    var _prefix = "";
    if(this.hasPrefix) {
      _prefix = "OpenAIRE | ";
    }
    var _title = _prefix + ((title.length > 50) ? title.substring(0, 50) : title);
    this._title.setTitle(_title);
    this._meta.updateTag({content: _title}, "property='og:title'");
  }

  updateUrl(url: string) {
    this._meta.updateTag({content: url}, "property='og:url'");
  }

  public getSelectedFiltersFromUrl(params) {
    for (var i = 0; i < this.fieldIds.length; i++) {

      var fieldId = this.fieldIds[i];
      var fieldparam = (this.fieldIdsMap[fieldId]) ? this.fieldIdsMap[fieldId].param : "";
      if (!this.fieldIdsMap[fieldId]) {

        console.error("Field: " + fieldId + " not found in fieldIds map");
      }

      var operatorId = this.getOperatorParameter(fieldparam);
      if (params[fieldparam] != undefined && params[operatorId] != undefined) {
        var values: string [] = StringUtils.URIDecode(params[fieldparam]).split(/,(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)/, -1);
        var operators: string [] = (StringUtils.URIDecode(params[operatorId])).split(/,(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)/, -1);
        if (values.length == operators.length) {
          for (var j = 0; j < values.length; j++) {
            if (this.fieldIdsMap[fieldId].type == "date") {
              var value: string = StringUtils.unquote(values[j]);
              var validDates: boolean = true;
              var dateField: AdvancedField = new AdvancedField(fieldId, fieldparam, this.fieldIdsMap[fieldId].name, this.fieldIdsMap[fieldId].type, value, operators[j]);
              if (value.indexOf("range") != -1) {
                dateField.dateValue.type = "range";
                if (value.length < 26) {
                  validDates = false;
                } else {
                  if (!Dates.isValidDate(value.substring(5, 15)) || !Dates.isValidDate(value.substring(16, 26))) {
                    validDates = false;
                  } else {
                    dateField.dateValue.from = Dates.getDateFromString(value.substring(5, 15));
                    dateField.dateValue.to = Dates.getDateFromString(value.substring(16, 26));
                  }
                }
                //  "rangeYYYY-MM-DD:YYYY-MM-DD"
              } else {
                dateField.dateValue.setDatesByType(value);
              }
              if (validDates) {
                this.selectedFields.push(dateField);
              }

            } else {
              this.selectedFields.push(new AdvancedField(fieldId, fieldparam, this.fieldIdsMap[fieldId].name, this.fieldIdsMap[fieldId].type, StringUtils.unquote(values[j]), operators[j]));
            }
          }
        }
      }
    }
    if (this.selectedFields.length == 0) {
      this.selectedFields.push(new AdvancedField(this.fieldIds[0], fieldparam, this.fieldIdsMap[this.fieldIds[0]].name, this.fieldIdsMap[this.fieldIds[0]].type, "", "and"));
    }
  }

  /**
   * Create Page URL parameters based on the selected fields of the advanced form
   * @param includePage
   */
  private createUrlParameters(includePage: boolean) {
    var params = "";
    this.parameterNames.splice(0, this.parameterNames.length);
    this.parameterValues.splice(0, this.parameterValues.length);
    var fields: { [key: string]: { values: string[], operators: string[] } } = {};
    for (var i = 0; i < this.selectedFields.length; i++) {
      if (this.fieldIdsMap[this.selectedFields[i].id] != undefined && (this.selectedFields[i].value.length > 0 || this.selectedFields[i].type == "date")) {
        if (!fields[this.selectedFields[i].id]) {
          fields[this.selectedFields[i].id] = {values: [], operators: []};
          fields[this.selectedFields[i].id].values = [];
          fields[this.selectedFields[i].id].operators = [];
        }
        if (this.selectedFields[i].type == "date") {
          if (this.selectedFields[i].dateValue.type == "range") {
            fields[this.selectedFields[i].id].values.push(StringUtils.quote(StringUtils.URIEncode("range" + Dates.getDateToString(this.selectedFields[i].dateValue.from) + ":" + Dates.getDateToString(this.selectedFields[i].dateValue.to))));
          } else {
            fields[this.selectedFields[i].id].values.push(StringUtils.quote(StringUtils.URIEncode(this.selectedFields[i].dateValue.type)));
          }
        } else {
          fields[this.selectedFields[i].id].values.push(StringUtils.quote(StringUtils.URIEncode(this.selectedFields[i].value)));
        }
        fields[this.selectedFields[i].id].operators.push(this.selectedFields[i].operatorId);

      }
    }
    for (var i = 0; i < this.fieldIds.length; i++) {
      if (fields[this.fieldIds[i]]) {

        params += "&" + this.fieldIdsMap[this.fieldIds[i]].param + "=" + fields[this.fieldIds[i]].values.join() +
          "&" + this.fieldIdsMap[this.fieldIds[i]].operator + "=" + fields[this.fieldIds[i]].operators.join()
        this.parameterNames.push(this.fieldIdsMap[this.fieldIds[i]].param);
        this.parameterValues.push(fields[this.fieldIds[i]].values.join());
        this.parameterNames.push(this.fieldIdsMap[this.fieldIds[i]].operator);
        this.parameterValues.push(fields[this.fieldIds[i]].operators.join());
      }
    }
    if (includePage && this.searchUtils.page != 1) {
      params += "&page=" + this.searchUtils.page;
    }

    if (this.searchUtils.size != 10) {
      params += ((params.length == 0) ? '' : '&') + 'size=' + this.searchUtils.size;
      this.parameterNames.push("size");
      this.parameterValues.push("" + this.searchUtils.size);
    }

    if (this.sort && this.searchUtils.sortBy) {
      params += ((params.length == 0) ? '' : '&') + 'sortBy=' + this.searchUtils.sortBy;
      this.parameterNames.push("sortBy");
      this.parameterValues.push(this.searchUtils.sortBy);
    }

    return '?' + params;
  }

  /**
   * Create Search API query based on the selected fields of the advanced form
   */
  public createQueryParameters() {
    var params = "";
    var countParams = 0;
    for (var i = 0; i < this.selectedFields.length; i++) {
      if (this.fieldIdsMap[this.selectedFields[i].id] != undefined && (this.selectedFields[i].value != "" || this.selectedFields[i].type == "date")) {
        //console.log("createQueryParameters::"+this.selectedFields[i].type);
        if (this.selectedFields[i].type == "date") {
          if (this.selectedFields[i].dateValue.type != "any") {
            params += (countParams == 0 ? "" : this.selectedFields[i].operatorId) + " " + this.selectedFields[i].id + this.fieldIdsMap[this.selectedFields[i].id].equalityOperator + '"' + StringUtils.URIEncode(Dates.getDateToString(this.selectedFields[i].dateValue.from)) + " "
              + StringUtils.URIEncode(Dates.getDateToString(this.selectedFields[i].dateValue.to)) + '"' + " ";
          }
        } else {
          if (this.selectedFields[i].id == "q") {
            var op = "";
            // if()
            params += (countParams == 0 ? "" : this.selectedFields[i].operatorId) + " " + '"' + StringUtils.URIEncode(this.selectedFields[i].value) + '"' + " ";
          } else if (countParams == 0 && this.selectedFields[i].operatorId == "not") {
            params += " " + this.selectedFields[i].id + " <> " + '"' + StringUtils.URIEncode(this.selectedFields[i].value) + '"' + " ";
          } else {
            params += (countParams == 0 ? "" : this.selectedFields[i].operatorId + " ") + this.selectedFields[i].id + this.fieldIdsMap[this.selectedFields[i].id].equalityOperator + '"' + encodeURIComponent(this.selectedFields[i].value) + '"' + " ";

          }
        }
        countParams++;
      }
    }

    if (this.customFilter) {
      params += (countParams == 0 ? "" : " and ") + this.customFilter.queryFieldName + " exact " + StringUtils.quote((this.customFilter.valueId));
    }
    return params;

  }

  goTo(page: number = 1) {
    this.searchUtils.page = page;
    this.createUrlParameters(true);
    this.router.navigate([this.searchUtils.baseUrl], {queryParams: this.routerHelper.createQueryParams(this.parameterNames, this.parameterValues)});
    /* Code For Piwik*/
    if (typeof localStorage !== 'undefined') {
      //console.log("In PreviousRouteRecorder : "+this.router.url );
      localStorage.setItem('previousRoute', this.router.url);
    }
    if (this.isPiwikEnabled && (typeof document !== 'undefined')) {
      this.piwiksub = this._piwikService.trackView(this.properties, this.pageTitle, this.piwikSiteId).subscribe();
    }
    /* End Piwik Code */
  }

  queryChanged($event) {

    this.goTo(1);
  }

  pageChanged($event) {
    this.searchUtils.page = +$event.value;
    this.goTo(this.searchUtils.page);
  }

  sizeChanged($event) {
    this.searchUtils.size = $event.value;
    this.goTo(1);
  }

  sortByChanged($event) {
    this.searchUtils.sortBy = $event.value;
    this.goTo(1);
  }

  /*
  * Update the url with proper parameters. This is used as base url in Paging Component
  */
  public updateBaseUrlWithParameters() {
    this.baseURLWithParameters = this.searchUtils.baseUrl + this.createUrlParameters(false);
  }

  getOperatorParameter(parameter: string): string {
    for (let id of this.fieldIds) {
      if (this.fieldIdsMap[id]["param"] == parameter) {
        return this.fieldIdsMap[id]["operator"];
      }
    }
  }

  // for loading
  public openLoading() {
    this.loading.open();
  }

  public closeLoading() {
    this.loading.close();
  }
}