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

import {Observable}                   from 'rxjs/Observable';

import {Filter, Value}                from './searchHelperClasses.class';
import {SearchResult}                 from '../../utils/entities/searchResult';
import {SearchFields, FieldDetails}   from '../../utils/properties/searchFields';
import {SearchUtilsClass}             from './searchUtils.class';
import {DOI, StringUtils}             from '../../utils/string-utils.class';
import {ModalLoading}                 from '../../utils/modal/loading.component';
import {SearchFilterComponent}        from './searchFilter.component';
import {SearchFilterModalComponent}   from './searchFilterModal.component';
import {ErrorCodes}                   from '../../utils/properties/errorCodes';
import {PiwikService}                 from '../../utils/piwik/piwik.service';
import {EnvProperties}                from '../../utils/properties/env-properties';


@Component({
    selector: 'search-page',
    templateUrl: 'searchPage.component.html'

})
export class SearchPageComponent {
  @Input() piwikSiteId = null;
  @Input() pageTitle = "";
  @Input() formPlaceholderText = "Type Keywords...";
  @Input() results = [];
  @Input() filters = [];
  @Input() type:string = "";
  @Input() entityType: string = "";
  @Input() searchUtils:SearchUtilsClass = new SearchUtilsClass();
  @Output() queryChange  = new EventEmitter();
  @Input() baseUrl:string = '';
  @Input() showResultCount:boolean = true;
  @Input() showRefine:boolean = true;
  @Input() refineFields = [];
  @Input() csvParams: string;
  @Input() csvPath: string;
  @Input() advancedSearchLink: string = "";
  @Input() advancedSearchParameters;
  @Input() tableViewLink: string;
  @Input() disableForms: boolean = false;
  @Input() loadPaging: boolean = true;
  @Input() oldTotalResults: number = 0;
  @Input() tableView: boolean = false;
  @Input() searchFormClass: string = "searchForm";
  @Input() openaireLink: string;
  @Input() connectCommunityId: string;
  @ViewChild (ModalLoading) loading : ModalLoading ;
  public fieldIdsMap;//:  { [key:string]:{ name:string, operator:string, type:string, indexField:string, equalityOperator:string  }};
  private searchFieldsHelper:SearchFields = new SearchFields();
  private queryParameters: Map<string, string>  = new Map<string,string>();
  private baseURLWithParameters:string = '';
  private sub: any; piwiksub: any;
  public countFilters= 0;
  public parameterNames:string[] =[];
  public parameterValues:string[] =[];
  public showUnknownFilters:boolean = false; // when a filter exists in query but has no results, so no filters returned from the query
  //@ViewChild (SearchFilterModalComponent) searchFilterModal : SearchFilterModalComponent ;
  public currentFilter: Filter;
  public csvLimit: number = 0;
  public pagingLimit: number = 0;
  public resultsPerPage: number = 0;
  public isPiwikEnabled;
  properties:EnvProperties;

  constructor (private route: ActivatedRoute,
               private location: Location,
               private _meta: Meta,
               private _title: Title,
               private element: ElementRef,
               private _piwikService:PiwikService,
               private router: Router) {
   }

  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);
        }
        if(typeof document !== 'undefined' && this.isPiwikEnabled){
          this.piwiksub = this._piwikService.trackView(this.properties, this.pageTitle, this.piwikSiteId).subscribe();
        }
      });
    if (typeof document !== 'undefined') {
       this.element.nativeElement.scrollIntoView();
    }
        // this.updateBaseUrlWithParameters(this.filters);
        this.updateTitle(this.pageTitle);
        var description = "Openaire, search, repositories, open access, type, content provider, funder, project, " + this.type + "," +this.pageTitle;
        this.updateDescription(description);

  }
  ngAfterViewChecked(){

  }
  ngOnDestroy() {
    if(this.piwiksub){
      this.piwiksub.unsubscribe();
    }
  }
  toggleModal($event) {
    this.currentFilter = $event.value;
    //this.searchFilterModal.open();
  }

  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 getQueryParametersFromUrl(params){ // called by ngOnInit function of search find pages
    // var parameters = "";
    var allFqs = "";

    this.queryParameters = new Map<string,string>();
    for(var i=0; i< this.refineFields.length ; i++){
         var filterId =  this.refineFields[i];

          if(params[filterId] != undefined) {
             this.queryParameters.set(filterId, StringUtils.URIDecode(params[filterId]));
             let values = (StringUtils.URIDecode(this.queryParameters.get(filterId))).split(/,(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)/,-1);
             var countvalues = 0;
             var fq = "";
             for(let value of values) {
               countvalues++;
               var paramId = this.fieldIdsMap[filterId].param;
              // parameters+='&' + paramId+ '='+ value;//+"&" + this.fieldIdsMap[paramId].operator + "="+((countvalues == 1)?"and":"or");
              fq+=(fq.length > 0 ? " " + "or" + " ":"" ) + filterId +" exact " +StringUtils.URIEncode(value);
             }
             if(countvalues > 0){
               fq="&fq="+fq;
             }
             allFqs += fq;
          }
   }
   var keyword = params['keyword'];
   var doiQuery = "";
   var keywordQuery = "";
   if((keyword && keyword.length > 0)){
      if((this.type == 'publications' ||this.type == 'research data')){
        var DOIs:string[] = DOI.getDOIsFromString(keyword);
       var doisParams = "";

       for(var i =0 ;i < DOIs.length; i++){
         doisParams+=(doisParams.length > 0?"&":"")+'doi="'+ DOIs[i]+'"';
       }
       if(doisParams.length > 0){
         doiQuery += "&"+doisParams;
       }else {
        keywordQuery += "&q="+StringUtils.URIEncode(keyword);
       }
     }else{
        keywordQuery += "&q="+StringUtils.URIEncode(keyword);

     }
   }
   return (doiQuery.length > 0 ? doiQuery:keywordQuery) + allFqs;
 }
 public getIndexQueryParametersFromUrl(params){  // called by ngOnInit function of search pages that request 'resources'
  //  var parameters = "";
   var allFqs = "";

   for(var i=0; i< this.refineFields.length ; i++){
        var filterId =  this.refineFields[i];
        var fq = "";
         if(params[filterId] != undefined) {
            this.queryParameters.set(filterId,decodeURIComponent(params[filterId]));
            let values = (decodeURIComponent(this.queryParameters.get(filterId))).split(/,(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)/,-1);
            var countvalues = 0
            for(let value of values) {
              countvalues++;
              // parameters+= ((countvalues == 1)?" and (":" or ")+ filterId+ '='+ value;
              fq+=(fq.length > 0 ? " " + "or" + " ":"" ) + filterId + " exact " + value;//StringUtils.quote(value);
            }
            // parameters+= " ) ";
            if(countvalues > 0){
              fq="&fq="+fq;
            }
            allFqs += fq;
        }

  }
  var keyword = params['keyword'];
  var doiQuery = "";
  var keywordQuery = "";
  if((keyword && keyword.length > 0)){
    if((this.type == 'publications' ||this.type == 'research data')){
      var DOIs:string[] = DOI.getDOIsFromString(keyword);
      var doisParams = "";

      for(var i =0 ;i < DOIs.length; i++){
        doisParams+=(doisParams.length > 0?"&":"")+'doi="'+ DOIs[i]+'"';
      }
      if(doisParams.length > 0){
        doiQuery += "&"+doisParams;
      }
    }else{
       keywordQuery += "and ("+StringUtils.quote(StringUtils.URIEncode(keyword)) +")";

    }
  }
  return (doiQuery.length > 0 ? doiQuery:keywordQuery) + allFqs;

}
 /*
 * Mark as check the new filters that are selected, when you get them from search
 */
  public checkSelectedFilters(filters:Filter[]){
    this.filters = filters;
       for(var i=0; i< filters.length ; i++){
            var filter:Filter = filters[i];
            filter.countSelectedValues = 0;
              if(this.queryParameters.get(filter.filterId) != undefined) {
                let values = (decodeURIComponent(this.queryParameters.get(filter.filterId))).split(/,(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)/,-1);
                     for(let filterValue of filter.values) {
                       if(values.indexOf(StringUtils.quote(filterValue.id)) > -1) {
                            filterValue.selected = true;
                            filter.countSelectedValues++;
                         }else{
                           filterValue.selected = false;

                         }
                    }
            }else{
              for(let filterValue of filter.values) {
                 filterValue.selected = false;
              }
            }
        }
        this.filterFilterValues(this.filters);
        return filters;
  }
  /*
  * For Funder filters - if funder selected
  */
   public filterFilterValues(filters:Filter[]){
     var funders = [];
     var funder_prefix = [];
        for(var i=0; i< filters.length ; i++){

             var filter:Filter = filters[i];
            //  console.log(filter.filterId);
             if(filter.filterId.indexOf("funder")!=-1 && this.queryParameters.get(filter.filterId) != undefined) {
                 let funders = (decodeURIComponent(this.queryParameters.get(filter.filterId))).split(/,(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)/,-1);
                      for(let funder of funders) {
                        console.log(funder);
                        funder_prefix.push(StringUtils.unquote(funder).split("____")[0]);
                     }
                    //  console.log(funder_prefix );
             }else if(filter.filterId.indexOf("funding")!=-1){
              //  console.log(" funding: "+filter.filterId );
               var filteredValues = []
               for(let filterValue of filter.values) {
                 var value_prefix = filterValue.id.split("____")[0];
                //  console.log("Value prefix: "+value_prefix );
                 if(funder_prefix.indexOf(value_prefix)!=-1){
                  //  console.log("here" + value_prefix);
                   filteredValues.push(filterValue);
                 }

               }
               console.log("From " +filter.values.length+ "to "+filteredValues.length);
               if(filteredValues.length > 0){
                 filter.values = filteredValues;
               }
             }else if(this.connectCommunityId && filter.filterId.indexOf("community")!=-1 ){
               var filteredValues = [];
               for(let filterValue of filter.values) {
                 if(this.connectCommunityId != filterValue.id){
                     filteredValues.push(filterValue);
                 }else{
                   filter.countSelectedValues-- ;
                 }
               }
               if(filteredValues.length > 0){
                 filter.values = filteredValues;
               }
         }
       }

         return filters;
   }
  /*
  * Update the url with proper parameters. This is used as base url in Paging Component
  */
  public updateBaseUrlWithParameters(filters:Filter[]){
    this.baseURLWithParameters = this.baseUrl + this.createUrlParameters(filters,false);

  }

  /*
  *Get The filters and create url parameters
  */
  private createUrlParameters(filters:Filter[], includePage:boolean){
    var allLimits="";//location.search.slice(1);
    this.queryParameters = new Map<string,string>();
    this.parameterNames.splice(0,this.parameterNames.length);
    this.parameterValues.splice(0,this.parameterValues.length);

    for (let filter of filters){
      var filterLimits="";
      if(filter.countSelectedValues > 0 || (this.connectCommunityId && filter.filterId.indexOf("community")!=-1)){
        for (let value of filter.values){
          if(value.selected == true){
            filterLimits+=((filterLimits.length == 0)?'':',') +'"'+ StringUtils.URIEncode(value.id)+'"';
          }
        }
        if(this.connectCommunityId && filter.filterId.indexOf("community")!=-1 ){
          filterLimits+=((filterLimits.length == 0)?'':',') +'"'+ StringUtils.URIEncode(this.connectCommunityId)+'"';
        }
        this.queryParameters.set(filter.filterId,filterLimits);
        if(filterLimits.length > 0){
          this.parameterNames.push(filter.filterId);
          this.parameterValues.push(filterLimits);
        }
        allLimits+=(allLimits.length==0?"?":"&")+((filterLimits.length == 0 )?'':filter.filterId + '='+ filterLimits) ;
      }
    }
    if(this.searchUtils.keyword.length > 0 ){
       allLimits+=(allLimits.length==0?"?":"&")+'keyword=' + this.searchUtils.keyword;
      this.parameterNames.push("keyword");
      this.parameterValues.push(this.searchUtils.keyword);
     }
    if(this.searchUtils.page != 1 && includePage){
       allLimits+=((allLimits.length == 0)?'?':'&') + 'page=' + this.searchUtils.page;
    }

    return allLimits;
  }
  /*
  *
  */
  private createSearchQueryParameters(filters:Filter[]){   // called by goTo, result emited to and used by search find pages
    var allFqs = "";
    for (let filter of filters){
      if(filter.countSelectedValues > 0 || (this.connectCommunityId && filter.filterId.indexOf("community")!=-1)){
        var fq = "";
        var count_selected=0;
        for (let value of filter.values){
          if(value.selected == true){
              count_selected++;
              fq+=(fq.length > 0 ? " " + filter.filterOperator + " ":"" ) + filter.filterId +  " exact " + StringUtils.quote(StringUtils.URIEncode(value.id));
           }
        }
        if(this.connectCommunityId && filter.filterId.indexOf("community")!=-1){
          count_selected++;
          fq+=(fq.length > 0 ? " " + filter.filterOperator + " ":"" ) + filter.filterId +  " exact " + StringUtils.quote(StringUtils.URIEncode(this.connectCommunityId));
        }
        fq="&fq="+fq;
        allFqs += fq;
      }
    }
      //TODO --
    var doiQuery = "";
    var keywordQuery = "";
    if((this.searchUtils.keyword && this.searchUtils.keyword.length > 0)){
      if((this.type == 'publications' ||this.type == 'research data')){
        var DOIs:string[] = DOI.getDOIsFromString(this.searchUtils.keyword);
        var doisParams = "";

        for(var i =0 ;i < DOIs.length; i++){
          doisParams+=(doisParams.length > 0?"&":"")+'doi="'+ DOIs[i]+'"';
        }
        if(doisParams.length > 0){
          doiQuery += "&"+doisParams;
        }else{
          keywordQuery += "&q="+StringUtils.URIEncode(this.searchUtils.keyword);
        }
      }else{
           keywordQuery += "&q="+StringUtils.URIEncode(this.searchUtils.keyword);
      }
    }

    return (doiQuery.length > 0 ? doiQuery:keywordQuery) + allFqs;

  }
  private createIndexQueryParameters(filters:Filter[]){   // called by goTo, result emited to and used by search pages that request 'resources'
    var allFqs = "";
    for (let filter of filters){
      if(filter.countSelectedValues > 0){
        var count_selected=0;
        var fq = "";
        for (let value of filter.values){
          if(value.selected == true){
              count_selected++;
               fq+=(fq.length > 0 ? " " + filter.filterOperator + " ":"" ) + filter.filterId + " exact " + StringUtils.quote(StringUtils.URIEncode(value.id));
           }
        }
        if(count_selected > 0){
          fq="&fq="+fq;
          allFqs += fq;
        }
      }
    }
    var doiQuery = "";
    var keywordQuery = "";
    if((this.searchUtils.keyword && this.searchUtils.keyword.length > 0)){
      if((this.type == 'publications' ||this.type == 'research data')){
        var DOIs:string[] = DOI.getDOIsFromString(this.searchUtils.keyword);
        var doisParams = "";
        for(var i =0 ;i < DOIs.length; i++){
          doisParams+=(doisParams.length > 0?"&":"")+'doi="'+ DOIs[i]+'"';
        }
        if(doisParams.length > 0){
          doiQuery += "&"+doisParams;
        }
      }else{
         keywordQuery += " and ("+StringUtils.quote(StringUtils.URIEncode(this.searchUtils.keyword)) +")"

      }
    }
    return (doiQuery.length > 0 ? doiQuery:keywordQuery) + allFqs;

  }
  public isFiltered(){
    var filtered=false;
    this.showUnknownFilters = false;
    for (let filter of this.filters){
       if(filter.countSelectedValues > 0){
           filtered = true;
           break;
       }
     }
    if(this.searchUtils.keyword.length > 0 ){
      filtered = true;
    }
    var errorCodes:ErrorCodes = new ErrorCodes();
    if(this.queryParameters.keys() && this.searchUtils.totalResults == 0 && this.searchUtils.status !=errorCodes.LOADING ){
      this.showUnknownFilters = true;
    }
    return filtered;
  }
  private clearKeywords(){
    if(this.searchUtils.keyword.length > 0 ){
      this.searchUtils.keyword ='';
    }
    this.goTo(1);
  }
  private clearFilters(){
    for (var i =0 ; i <  this.filters.length; i++){
         for (var j=0; j <  this.filters[i].countSelectedValues; j++){
          if(this.filters[i].values[j].selected){
            this.filters[i].values[j].selected = false;
           }
        this.filters[i].countSelectedValues = 0;
      }
    }
    this.clearKeywords();

  }
  private removeFilter(value:Value,filter:Filter){
    filter.countSelectedValues--;
    if(value.selected == true){
      value.selected = false;
     }
    this.goTo(1);

  }
  goTo(page:number = 1){
    this.searchUtils.page = page;
    console.info("searchUtils.page goto = "+this.searchUtils.page);
    var urlParameters = this.createUrlParameters(this.filters,true);
    console.info("urlParams : "+urlParameters);
    this.updateBaseUrlWithParameters(this.filters);
    var queryParameters = this.createSearchQueryParameters(this.filters);
    console.info("queryParams : "+queryParameters);
    var indexQuery = this.createIndexQueryParameters(this.filters);

    this.location.go(location.pathname,urlParameters);
/* Code For Piwik*/
    if (typeof localStorage !== 'undefined') {
      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 */
    this.queryChange.emit({
        value: queryParameters,
        index:indexQuery

    });
    if (typeof document !== 'undefined') {
       this.element.nativeElement.scrollIntoView();
    }
  }
  filterChanged($event){
    console.info("filter Changed");
       this.goTo(1);
  }
  keywordChanged($event) {
       this.searchUtils.keyword = $event.value;
       this.goTo(1);
  }

  /*
  * Get A sub-array of this.refineFields array, which contains the ids of the selected filters
  */
  public getSelectedFilters():string[] {
    var selected:string[] = [];
    for(var i=0; i <  this.filters.length; i++){
      var filter:Filter = this.filters[i];
      if(filter.countSelectedValues > 0){
          selected.push(filter.filterId);
      }
    }
    return selected;
  }
  /*
  * Get A sub-array of this.refineFields array, which contains the ids of the selected parameters
  */
  private getSelectedParameters():string[] {
    var selected:string[] = [];
    var params:string[] = Object.keys(this.queryParameters);
    for(var i=0; i <  params.length; i++){
       if(this.refineFields.indexOf(params[i]) > -1){
          selected.push(params[i]);
      }
    }
    return selected;
  }
  /*
  * Get A sub-array of this.refineFields array, which hides hidden fields (e.g Funding level 0,1,2,..), and contains those that depend on another fields (e.g  Funding level 0 if Funder is selected )
  */
  public getFields():string[] {
    var selected_filters:string[] = this.getSelectedFilters();
    if(selected_filters.length == 0){
      selected_filters = this.getSelectedParameters();
    }
    var fields:string[] = [];
    for(var i =0 ; i < this.refineFields.length;i++){
      var dependentTo = this.searchFieldsHelper.DEPENDENT_FIELDS[this.refineFields[i]];

      //if filter is not marked as hidden OR it is hidden but it is dependent to a field that it IS selected
      if(this.searchFieldsHelper.HIDDEN_FIELDS.indexOf(this.refineFields[i]) == -1 || (selected_filters.indexOf(dependentTo) != -1) || (selected_filters.indexOf(this.refineFields[i]) != -1) ){
          fields.push(this.refineFields[i]);
       }
    }
    return fields;
  }
  /*
  * Get a query  string of all fields, that want to get from search (e.g. &fields=funderid&fields=projectstartyear&...))
  */
  public getRefineFieldsQuery():string{

    var fields:string[] = this.getFields();
    var fieldsStr = ""
    for(var i =0 ; i < fields.length  ;i++){
        fieldsStr+="&fields="+fields[i];
    }
    return "&refine=true"+fieldsStr;
  }

  // for loading
  public openLoading(){
    if(this.loading){
      this.loading.open();
    }
  }
  public closeLoading(){
    if(this.loading){
      this.loading.close();
    }
  }
  getSelectedValues(filter):any{
    var selected = [];
    if(filter.countSelectedValues >0){
      for (var i=0; i < filter.values.length; i++){
        if(filter.values[i].selected){
          selected.push(filter.values[i]);
        }
      }
    }
    return selected;

  }
}