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

import {FetchResearchResults} from '../../utils/fetchEntitiesClasses/fetchResearchResults.class';
import {FetchDataproviders} from '../../utils/fetchEntitiesClasses/fetchDataproviders.class';
import {FetchProjects} from '../../utils/fetchEntitiesClasses/fetchProjects.class';
import {FetchOrganizations} from '../../utils/fetchEntitiesClasses/fetchOrganizations.class';

import {SearchResearchResultsService} from '../../services/searchResearchResults.service';
import {SearchDataprovidersService} from '../../services/searchDataproviders.service';
import {SearchProjectsService} from '../../services/searchProjects.service';
import {SearchOrganizationsService} from '../../services/searchOrganizations.service';

import {SearchFields} from '../../utils/properties/searchFields';
import {ErrorCodes} from '../../utils/properties/errorCodes';
import {RouterHelper} from '../../utils/routerHelper.class';
import {RefineFieldResultsService} from '../../services/refineFieldResults.service';
import {PiwikService} from '../../utils/piwik/piwik.service';
import {ConfigurationService} from '../../utils/configuration/configuration.service';
import {EnvProperties} from '../../utils/properties/env-properties';
import {SEOService} from '../../sharedComponents/SEO/SEO.service';
import {StringUtils} from '../../utils/string-utils.class';
import {SearchCustomFilter} from "../searchUtils/searchUtils.class";
import {Observable, Subscription} from "rxjs";

@Component({
  changeDetection: ChangeDetectionStrategy.Default,
  encapsulation: ViewEncapsulation.Emulated,
  selector: 'search-find',
  templateUrl: 'search.component.html'
})
export class SearchComponent {
  subs: Subscription[] = [];

  public reloadPublications: boolean;
  public reloadDatasets: boolean;
  public reloadSoftware: boolean;
  public reloadOrps: boolean;
  public reloadProjects: boolean;
  public reloadDataproviders: boolean;
  public reloadOrganizations: boolean;


  public pageTitle = "Search in OpenAIRE"
  public keyword: string = "";
  public publications: string[];
  public datasets: string[];
  public software: string[];
  public orps: string[];
  public projectsTab: string[];
  public dataproviders: string[];
  public organizations: string[];

  public activeTab = "publications";
  public linkToSearchPublications = "";
  public linkToSearchProjects = "";
  public linkToSearchDataproviders = "";
  public linkToSearchDatasets = "";
  public linkToSearchSoftware = "";
  public linkToSearchOrps = "";
  public linkToSearchOrganizations = "";

  public fetchPublications: FetchResearchResults;
  public fetchDataproviders: FetchDataproviders;
  public fetchProjects: FetchProjects;
  public fetchDatasets: FetchResearchResults;
  public fetchSoftware: FetchResearchResults;
  public fetchOrps: FetchResearchResults;
  public fetchOrganizations: FetchOrganizations;

  public searchFields: SearchFields = new SearchFields();
  public errorCodes: ErrorCodes = new ErrorCodes();
  public routerHelper: RouterHelper = new RouterHelper();

  public publicationsSize: any = null;
  public datasetsSize: any = null;
  public softwareSize: any = null;
  public oprsSize: any = null;
  public fundersSize: any = null;
  public projectsSize: any = null;
  public datasourcesSize: any = null;
  showPublications: boolean = false;
  showDatasets: boolean = false;
  showSoftware: boolean = false;
  showOrps: boolean = false;
  showProjects: boolean = false;
  showDataProviders: boolean = false;
  showOrganizations: boolean = false;
  advancedSearchLink: string = "/search/advanced/publications";
  properties: EnvProperties;
  @Input() logoURL;
  @Input() name;
  @Input() customFilter: SearchCustomFilter = null;
  @Input() piwikSiteId = null;
  @Input() formPlaceholderText = "Search for research outcomes, projects, content providers & organizations in OpenAIRE";

  constructor(private route: ActivatedRoute,
              private _router: Router,
              private _searchResearchResultsService: SearchResearchResultsService,
              private _searchDataprovidersService: SearchDataprovidersService,
              private _searchProjectsService: SearchProjectsService,
              private _searchOrganizationsService: SearchOrganizationsService,
              private _refineFieldResultsService: RefineFieldResultsService,
              private location: Location,
              private _meta: Meta,
              private _title: Title,
              private _piwikService: PiwikService,
              private config: ConfigurationService,
              private seoService: SEOService) {
    this.fetchPublications = new FetchResearchResults(this._searchResearchResultsService);
    this.fetchDataproviders = new FetchDataproviders(this._searchDataprovidersService);
    this.fetchProjects = new FetchProjects(this._searchProjectsService);
    this.fetchDatasets = new FetchResearchResults(this._searchResearchResultsService);
    this.fetchSoftware = new FetchResearchResults(this._searchResearchResultsService);
    this.fetchOrps = new FetchResearchResults(this._searchResearchResultsService);
    this.fetchOrganizations = new FetchOrganizations(this._searchOrganizationsService);

  }

  public ngOnInit() {
    this.subs.push(this.route.data
      .subscribe((data: { envSpecific: EnvProperties }) => {

        var description = "open access, research, scientific publication, European Commission, EC, FP7, ERC, Horizon 2020, H2020, search, projects ";
        var title = "OpenAIRE | Search publications, research data, projects... | OpenAIRE";
        this.properties = data.envSpecific;
        var url = data.envSpecific.baseLink + this._router.url;
        this._title.setTitle(title);
        this._meta.updateTag({content: description}, "name='description'");
        this._meta.updateTag({content: description}, "property='og:description'");
        this._meta.updateTag({content: title}, "property='og:title'");
        this._meta.updateTag({content: url}, "property='og:url'");
        this.seoService.createLinkForCanonicalURL(this.properties.baseLink + this._router.url, false);
        if (this.properties.enablePiwikTrack && (typeof document !== 'undefined')) {
          this.subs.push(this._piwikService.trackView(this.properties, "OpenAIRE |Search publications, research data, projects...", this.piwikSiteId).subscribe());

        }


        if ((this.customFilter && this.customFilter.queryFieldName == "communityId") || this.properties.adminToolsCommunity) {
          //this.subs.push(this.config.getCommunityInformation(this.properties, (this.customFilter && this.customFilter.queryFieldName == "communityId") ? this.customFilter.valueId : this.properties.adminToolsCommunity).subscribe(data => {
          this.subs.push(this.config.communityInformationState.subscribe(data => {
            if(data) {
              var showEntity = {};
              for (var i = 0; i < data['entities'].length; i++) {

                showEntity["" + data['entities'][i]["pid"] + ""] = data['entities'][i]["isEnabled"];
              }
              this.showPublications = showEntity["publication"];
              this.showDatasets = showEntity["dataset"];
              this.showProjects = showEntity["project"];
              this.showOrganizations = showEntity["organization"];
              this.showDataProviders = showEntity["datasource"];
              this.showSoftware = showEntity["software"];
              this.showOrps = showEntity["orp"];
              if (this.customFilter && this.customFilter.queryFieldName == "communityId") {
                this.showProjects = false;
                this.showOrganizations = false;
                this.showDataProviders = false;
              }
              this.loadAll();
            }
          }));
        } else {
          if ((this.customFilter && this.customFilter.queryFieldName == "country")) {
            this.showPublications =true;
            this.showDatasets = true;
            this.showDataProviders = true;
            this.showSoftware =  true;
            this.showOrps = true;
            this.showProjects = true;
            this.showOrganizations = true;
            this.showDataProviders = true;
          }
        }
        this.loadAll();
      }));
  }

  loadAll() {
    this.subs.push(this.route.queryParams.subscribe(params => {

      this.reloadTabs();
      this.keyword = (params['keyword']) ? params['keyword'] : "";
      if (this.keyword != null && this.keyword.length > 0) {
        //if showPublications == false will setValues another entity as the first
        if (this.showPublications) {
          this.activeTab = "publications";
          this.searchPublications();
        } else if (this.showDatasets) {
          this.activeTab = "research data";
          this.searchDatasets();
        } else if (this.showSoftware) {
          this.activeTab = "software";
          this.searchSoftware();
        } else if (this.showOrps) {
          this.activeTab = "other research products";
          this.searchOrps();
        } else if (this.showProjects) {
          this.activeTab = "projects";
          this.searchProjects();
        } else if (this.showDataProviders) {
          this.activeTab = "content providers";
          this.searchDataProviders();
        } else if (this.showOrganizations) {
          this.activeTab = "organizations";
          this.searchOrganizations();
        }
        this.count();
      }
    }));
  }


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

  public searchPublications() {
    this.activeTab = "publications";
    this.advancedSearchLink = this.properties.searchLinkToAdvancedPublications;//"/search/advanced/publications";
    if (this.reloadPublications &&
      this.fetchPublications.searchUtils.status != this.errorCodes.NONE /*&&
        this.fetchPublications.searchUtils.status != this.errorCodes.ERROR*/
      && (this.keyword != null && this.keyword.length > 0)) {
      this.reloadPublications = false;
      this.fetchPublications.getResultsByKeyword("publication", this.keyword, 1, 10, this.properties, this.customFilter);
      this.linkToSearchPublications = this.properties.searchLinkToPublications;// + "?keyword="  + this.keyword;
    }
  }

  public searchDatasets() {
    this.activeTab = "research data";
    this.advancedSearchLink = this.properties.searchLinkToAdvancedDatasets;//"/search/advanced/datasets";
    if (this.reloadDatasets &&
      this.fetchDatasets.searchUtils.status != this.errorCodes.NONE /*&&
        this.fetchDatasets.searchUtils.status != this.errorCodes.ERROR*/
      && (this.keyword != null && this.keyword.length > 0)) {
      this.reloadDatasets = false;
      this.fetchDatasets.getResultsByKeyword("dataset", this.keyword, 1, 10, this.properties, this.customFilter);
      this.linkToSearchDatasets = this.properties.searchLinkToDatasets;// + "?keyword="  + this.keyword;
    }
  }

  public searchSoftware() {

    this.activeTab = "software";
    this.advancedSearchLink = this.properties.searchLinkToAdvancedSoftware;//"/search/advanced/software";
    if (this.reloadSoftware
      && this.fetchSoftware.searchUtils.status != this.errorCodes.NONE/* &&
        ( this.fetchSoftware.searchUtils.status == this.errorCodes.LOADING ||
          this.fetchSoftware.searchUtils.status == this.errorCodes.DONE )*/
      && (this.keyword != null && this.keyword.length > 0)) {
      this.reloadSoftware = false;
      this.fetchSoftware.getResultsByKeyword("software", this.keyword, 1, 10, this.properties, this.customFilter);
      this.linkToSearchSoftware = this.properties.searchLinkToSoftware;// + "?keyword="  + this.keyword;
    }
  }

  public searchOrps() {
    this.activeTab = "other research products";
    this.advancedSearchLink = this.properties.searchLinkToAdvancedOrps;//"/search/advanced/other";
    if (this.reloadOrps &&
      this.fetchOrps.searchUtils.status != this.errorCodes.NONE /*&&
        this.fetchOrps.searchUtils.status != this.errorCodes.ERROR*/
      && (this.keyword != null && this.keyword.length > 0)) {
      this.reloadOrps = false;
      this.fetchOrps.getResultsByKeyword("other", this.keyword, 1, 10, this.properties, this.customFilter);
      this.linkToSearchOrps = this.properties.searchLinkToOrps;
    }
  }

  public searchProjects() {
    this.activeTab = "projects";
    this.advancedSearchLink = this.properties.searchLinkToAdvancedProjects;//"/search/advanced/projects";
    if (this.reloadProjects &&
      this.fetchProjects.searchUtils.status != this.errorCodes.NONE /*&&
        this.fetchProjects.searchUtils.status != this.errorCodes.ERROR*/
      && (this.keyword != null && this.keyword.length > 0)) {
      this.reloadProjects = false;
      this.fetchProjects.getResultsByKeyword(this.keyword, 1, 10, this.properties, this.customFilter);
      this.linkToSearchProjects = this.properties.searchLinkToProjects;// + "?keyword="  + this.keyword;
    }
  }

  public searchDataProviders() {
    this.activeTab = "content providers";
    this.advancedSearchLink = this.properties.searchLinkToAdvancedDataProviders;//"/search/advanced/dataproviders";
    if (this.reloadDataproviders &&
      this.fetchDataproviders.searchUtils.status != this.errorCodes.NONE /*&&
         this.fetchDataproviders.searchUtils.status != this.errorCodes.ERROR*/
      && (this.keyword != null && this.keyword.length > 0)) {
      this.reloadDataproviders = false;
      this.fetchDataproviders.getResultsByKeyword(this.keyword, 1, 10, this.properties, this.customFilter);
      this.linkToSearchDataproviders = this.properties.searchLinkToDataProviders;// + "?keyword="  + this.keyword;
    }
  }

  public searchOrganizations() {
    this.activeTab = "organizations";
    this.advancedSearchLink = this.properties.searchLinkToAdvancedOrganizations;//"/search/advanced/organizations";
    if (this.reloadOrganizations &&
      this.fetchOrganizations.searchUtils.status != this.errorCodes.NONE /*&&
         this.fetchOrganizations.searchUtils.status != this.errorCodes.ERROR*/
      && (this.keyword != null && this.keyword.length > 0)) {
      this.reloadOrganizations = false;
      this.fetchOrganizations.getResultsByKeyword(this.keyword, 1, 10, this.properties, this.customFilter);
      this.linkToSearchOrganizations = this.properties.searchLinkToOrganizations;// + "?keyword="  + this.keyword;
    }
  }


  public keywordChanged($event) {

    this.keyword = $event.value;
    //console.info("Search Find: search with keyword \"" +  this.keyword + "\"" );
    this.location.go(location.pathname, "?keyword=" + this.keyword);
    this.reloadTabs();
    if (this.activeTab == "publications") {
      this.searchPublications();
    }
    if (this.activeTab == "projects") {
      this.searchProjects();
    }
    if (this.activeTab == "content providers") {
      this.searchDataProviders();
    }
    if (this.activeTab == "research data") {
      this.searchDatasets();
    }
    if (this.activeTab == "software") {
      this.searchSoftware();
    }
    if (this.activeTab == "other research products") {
      this.searchOrps();
    }
    if (this.activeTab == "organizations") {
      this.searchOrganizations();
    }

    this.count();
  }

  private count() {
    var refineParams = null;
    if (this.customFilter) {
      refineParams = (refineParams ? (refineParams + '&') : '') + "&fq=" + StringUtils.URIEncode(this.customFilter.queryFieldName + " exact " + StringUtils.quote((this.customFilter.valueId)));
    }
    if (this.activeTab != "publications" && this.showPublications) {
      this.fetchPublications.searchUtils.status = this.errorCodes.LOADING;
      this.fetchPublications.results = [];

      this.subs.push(this.numOfSearchResults("publication", this.fetchPublications, refineParams));
    }
    if (this.activeTab != "research data" && this.showDatasets) {
      this.fetchDatasets.searchUtils.status = this.errorCodes.LOADING;
      this.fetchDatasets.results = [];
      this.subs.push(this.numOfSearchResults("dataset", this.fetchDatasets, refineParams));
    }
    if (this.activeTab != "software" && this.showSoftware) {
      this.fetchSoftware.searchUtils.status = this.errorCodes.LOADING;
      this.fetchSoftware.results = [];
      this.subs.push(this.numOfSearchResults("software", this.fetchSoftware, refineParams));
    }
    if (this.activeTab != "other research products" && this.showOrps) {
      this.fetchOrps.searchUtils.status = this.errorCodes.LOADING;
      this.fetchOrps.results = [];
      this.subs.push(this.numOfSearchResults("other", this.fetchOrps, refineParams));
    }
    if (this.activeTab != "projects" && this.showProjects) {
      this.fetchProjects.searchUtils.status = this.errorCodes.LOADING;
      this.fetchProjects.results = [];
      this.subs.push(this._searchProjectsService.numOfSearchProjects(this.keyword, this.properties, refineParams).subscribe(
        data => {
          this.fetchProjects.searchUtils.totalResults = data;
          this.fetchProjects.searchUtils.status = this.errorCodes.DONE;
          if (this.fetchProjects.searchUtils.totalResults == 0) {
            this.fetchProjects.searchUtils.status = this.errorCodes.NONE;
          }
        },
        err => {
          //console.log(err);
          this.handleError("Error getting number of Projects", err);
          this.fetchProjects.searchUtils.status = this.errorCodes.ERROR;
        }
      ));
    }
    if (this.activeTab != "content providers" && this.showDataProviders) {
      this.fetchDataproviders.results = [];
      this.fetchDataproviders.getNumForSearch(this.keyword, this.properties, refineParams);
    }
    if (this.activeTab != "organizations" && this.showOrganizations) {
      this.fetchOrganizations.searchUtils.status = this.errorCodes.LOADING;
      this.fetchOrganizations.results = [];
      this.subs.push(this._searchOrganizationsService.numOfSearchOrganizations(this.keyword, this.properties, refineParams).subscribe(
        data => {
          this.fetchOrganizations.searchUtils.totalResults = data;
          this.fetchOrganizations.searchUtils.status = this.errorCodes.DONE;
          if (this.fetchOrganizations.searchUtils.totalResults == 0) {
            this.fetchOrganizations.searchUtils.status = this.errorCodes.NONE;
          }
        },
        err => {
          //console.log(err);
          this.handleError("Error getting number of Organizations", err);
          this.fetchOrganizations.searchUtils.status = this.errorCodes.ERROR;

        }
      ));
    }


  }

  private numOfSearchResults(resultType: string, fetchClass: FetchResearchResults, refineParams) {
    return this._searchResearchResultsService.numOfSearchResults(resultType, this.keyword, this.properties, refineParams).subscribe(
      data => {
        fetchClass.searchUtils.totalResults = data;
        fetchClass.searchUtils.status = this.errorCodes.DONE;
        if (fetchClass.searchUtils.totalResults == 0) {
          fetchClass.searchUtils.status = this.errorCodes.NONE;
        }
      },
      err => {
        this.handleError("Error getting number of "+this.getEntityName(resultType, true, true), err);
        fetchClass.searchUtils.status = this.errorCodes.ERROR;
      }
    );
  }

  private reloadTabs() {
    this.reloadPublications = true;
    this.reloadDatasets = true;
    this.reloadSoftware = true;
    this.reloadOrps = true;
    this.reloadProjects = true;
    this.reloadDataproviders = true;
    this.reloadOrganizations = true;
    this.fetchOrganizations.searchUtils.status = null;
    this.fetchDataproviders.searchUtils.status = null;
    this.fetchProjects.searchUtils.status = null;
    this.fetchPublications.searchUtils.status = null;
    this.fetchDatasets.searchUtils.status = null;
    this.fetchSoftware.searchUtils.status = null;
    this.fetchOrps.searchUtils.status = null;
  }

  private handleError(message: string, error) {
    console.error("General Search Page: " + message, error);
  }

  private 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");
    }
  }
}