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

import {Observable}                   from 'rxjs';

import {Filter, Value, AdvancedField} from '../searchUtils/searchHelperClasses.class';
import {SearchResult}                 from '../../utils/entities/searchResult';
import {SearchFields, FieldDetails}   from '../../utils/properties/searchFields';
import {SearchCustomFilter, SearchUtilsClass} from './searchUtils.class';
import {ModalLoading}                 from '../../utils/modal/loading.component';
import {StringUtils, Dates}           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';

@Component({
    selector: 'advanced-search-page',
    templateUrl: 'advancedSearchPage.component.html'
})
export class AdvancedSearchPageComponent {
  @Input() piwikSiteId = null;
  @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 routerHelper:RouterHelper = new RouterHelper();
  public errorCodes:ErrorCodes = new ErrorCodes();

  url = null;
  @Output() queryChange  = new EventEmitter();
  constructor (private route: ActivatedRoute,
               private location: Location,
               private _meta: Meta,
               private _title: Title,
               private _piwikService:PiwikService,
               private router: Router,
             private seoService: SEOService) {
   }

  ngOnInit() {
    this.route.data
      .subscribe((data: { envSpecific: EnvProperties }) => {
        this.properties = data.envSpecific;
        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 title = "Advanced search "+this.pageTitle;
    var description = "Openaire, search, repositories, open access, type, content provider, funder, project, "+ this.pageTitle;

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

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

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


  }

  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 ="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"));
   }
  }
  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;
  }
  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;

  }
  clearFilters(){
  }

  goTo(page:number = 1){
     this.searchUtils.page = page;
    var urlParameters = this.createUrlParameters(true);
    var queryParameters = this.createQueryParameters();
    //this.location.go(location.pathname,urlParameters);
    this.router.navigate( [this.searchUtils.baseUrl], { queryParams: this.routerHelper.createQueryParams(this.parameterNames, this.parameterValues) } );

    this.queryChange.emit({
        value: queryParameters
    });
    /* 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();
   }
}