import {Component, ViewChild, OnDestroy, AfterViewInit} from '@angular/core';
import {ActivatedRoute, Router} from '@angular/router';
import {Meta, Title} from '@angular/platform-browser';
import {EnvProperties} from '../openaireLibrary/utils/properties/env-properties';
import {PiwikService} from '../openaireLibrary/utils/piwik/piwik.service';

import {ErrorCodes} from '../openaireLibrary/utils/properties/errorCodes';
import {ErrorMessagesComponent} from '../openaireLibrary/utils/errorMessages.component';
import {HelperService} from "../openaireLibrary/utils/helper/helper.service";
import {SEOService} from "../openaireLibrary/sharedComponents/SEO/SEO.service";
import {RefineFieldResultsService} from "../openaireLibrary/services/refineFieldResults.service";
import {NumberUtils} from "../openaireLibrary/utils/number-utils.class";
import {SearchResearchResultsService} from "../openaireLibrary/services/searchResearchResults.service";
import {StakeholderService} from "../openaireLibrary/monitor/services/stakeholder.service";
import {LocalStorageService} from "../openaireLibrary/services/localStorage.service";
import {Stakeholder, StakeholderInfo} from "../openaireLibrary/monitor/entities/stakeholder";
import {User} from "../openaireLibrary/login/utils/helper.class";
import {UserManagementService} from "../openaireLibrary/services/user-management.service";
import {properties} from "../../environments/environment";
import {Subscriber} from "rxjs";
import {QuickContactService} from '../openaireLibrary/sharedComponents/quick-contact/quick-contact.service';
import {CanExitGuard, IDeactivateComponent} from "../openaireLibrary/utils/can-exit.guard";

@Component({
  selector: 'home',
  templateUrl: 'home.component.html',
  styleUrls: ['home.component.css']
})
export class HomeComponent implements OnDestroy, AfterViewInit, IDeactivateComponent {
  public pageTitle = "OpenAIRE | Monitor";
  public description = "OpenAIRE - Monitor, A new era of monitoring research. Open data. Open methodologies. Work together with us to view, understand and visualize research statistics and indicators.";
  public stakeholders: StakeholderInfo[] = [];
  public stakeholdersSlider: {
    stakeholders: StakeholderInfo[][];
    funders: StakeholderInfo[][];
    ris: StakeholderInfo[][];
    organizations: StakeholderInfo[][];
  };
  public selected: Stakeholder = null;
  public pageContents = null;
  public divContents = null;
  // Message variables
  public status: number;
  public loading: boolean = true;
  public errorCodes: ErrorCodes;
  public properties: EnvProperties = properties;
  /* Section scroll Map */
  public map: Map<string, string> = new Map<string, string>([['1st', 'ipad'], ['2nd', 'ipad'], ['3rd', 'ipad']])
  public type: string = null;
  public directLink: boolean = true;
  public publicationsSize: any = null;
  public datasetsSize: any = null;
  public softwareSize: any = null;
  public otherSize: any = null;
  public fundersSize: any = null;
	public showQuickContact: boolean = true;
  @ViewChild('AlertModal') modal;
  private errorMessages: ErrorMessagesComponent;
  private subscriptions = [];
  private user: User;
	private observer: IntersectionObserver = null;

  constructor(
    private route: ActivatedRoute,
    private _router: Router,
    private _meta: Meta,
    private _title: Title,
    private _piwikService: PiwikService,
    private _stakeholderService: StakeholderService,
    private localStorageService: LocalStorageService,
    private userManagementService: UserManagementService,
    private helper: HelperService,
    private seoService: SEOService,
    private _refineFieldResultsService: RefineFieldResultsService,
		private _searchResearchResultsService: SearchResearchResultsService,
		private quickContactService: QuickContactService) {
    this._meta.updateTag({content: this.description}, "name='description'");
    this._meta.updateTag({content: this.description}, "property='og:description'");
    this._meta.updateTag({content: this.pageTitle}, "property='og:title'");
    this._title.setTitle(this.pageTitle);
    this.errorCodes = new ErrorCodes();
    this.errorMessages = new ErrorMessagesComponent();
    this.status = this.errorCodes.LOADING;
  }

  public ngOnInit() {
    let url = this.properties.domain + this.properties.baseLink + this._router.url;
    this.seoService.createLinkForCanonicalURL(url, false);
    this._meta.updateTag({content: url}, "property='og:url'");
    if (this.properties.enablePiwikTrack && (typeof document !== 'undefined')) {
      this.subscriptions.push(this._piwikService.trackView(this.properties, "OpenAIRE Monitor", this.properties.piwikSiteId).subscribe());
    }
    this.getNumbers();
    this.subscriptions.push(this.localStorageService.get().subscribe(value => {
      this.directLink = value;
    }));
    this.subscriptions.push(this.userManagementService.getUserInfo().subscribe(user => {
      this.user = user;
      this.getStakeholders();
    }));
  }
  
  canExit(): boolean {
    this.subscriptions.forEach(value => {
      if (value instanceof Subscriber) {
        value.unsubscribe();
      }
    });
    if (this.observer) {
      this.observer.disconnect();
    }
    return true;
  }

	OnDestroy() {
    this.subscriptions.forEach(value => {
      if (value instanceof Subscriber) {
        value.unsubscribe();
      }
    });
    if (this.observer) {
      this.observer.disconnect();
    }
  }

	ngAfterViewInit() {
    if (typeof document !== "undefined") {
      this.createObserver();
    }
  }

	createObserver() {
		let target = document.querySelector('#contact-us');
		let options = {
			root: null,
			rootMargin: '200px',
			threshold: 1.0
		};
		this.observer = new IntersectionObserver(entries => {
			entries.forEach(entry => {
				if(entry.isIntersecting && this.showQuickContact) {
					this.showQuickContact = false;
					this.quickContactService.setDisplay(this.showQuickContact);
				} else if(!entry.isIntersecting && !this.showQuickContact) {
					this.showQuickContact = true;
					this.quickContactService.setDisplay(this.showQuickContact);
				}
			})
		}, options);
		this.observer.observe(target);
	}

  private getPageContents() {
    this.subscriptions.push(this.helper.getPageHelpContents(this.properties, 'monitor', this._router.url).subscribe(contents => {
      this.pageContents = contents;
    }));
  }
  
  private getDivContents() {
    this.subscriptions.push(this.helper.getDivHelpContents(this.properties, 'monitor', this._router.url).subscribe(contents => {
      this.divContents = contents;
    }));
  }
  
  public get stakeholdersNumber(): number {
    if(this.type === null) {
      return this.stakeholders.length;
    } else {
      return this.stakeholders.filter(stakeholder => stakeholder.type === this.type).length;
    }
  }
  
  getNumbers() {
    this.subscriptions.push(this._refineFieldResultsService.getRefineFieldsResultsByEntityName(["funder"], "project", this.properties).subscribe(
      data => {
        if (data[1].length > 0 && data[1][0].filterId == "funder" && data[1][0].values) {
          this.fundersSize = NumberUtils.roundNumber(data[1][0].values.length);
        }
      },
      err => {
        //console.log(err);
        this.handleError("Error getting 'funder' field results of projects", err);
      }));

    this.subscriptions.push(this._searchResearchResultsService.numOfSearchResults("publication", "", this.properties).subscribe(
      data => {
        if (data && data > 0) {
          this.publicationsSize = NumberUtils.roundNumber(data);
        }
      },
      err => {
        //console.log(err);
        this.handleError("Error getting number of publications", err);
      }
    ));

    this.subscriptions.push(this._searchResearchResultsService.numOfSearchResults("dataset", "", this.properties).subscribe(
      data => {
        if (data && data > 0) {
          this.datasetsSize = NumberUtils.roundNumber(data);
        }
      },
      err => {
        //console.log(err);
        this.handleError("Error getting number of research data", err);
      }
    ));

    this.subscriptions.push(this._searchResearchResultsService.numOfSearchResults("software", "", this.properties).subscribe(
      data => {
        if (data && data > 0) {
          this.softwareSize = NumberUtils.roundNumber(data);
        }
      },
      err => {
        this.handleError("Error getting number of software data", err);
      }
    ));

    this.subscriptions.push(this._searchResearchResultsService.numOfSearchResults("other", "", this.properties).subscribe(
      data => {
        if (data && data > 0) {
          this.otherSize = NumberUtils.roundNumber(data);
        }
      },
      err => {
        this.handleError("Error getting number of software data", err);
      }
    ));
    
    
  }
  
  public getStakeholders() {
    this.loading = true;
    this.status = this.errorCodes.LOADING;
    this.subscriptions.push(this._stakeholderService.getStakeholders(this.properties.monitorServiceAPIURL).subscribe(
      stakeholders => {
        if (!stakeholders || stakeholders.length == 0) {
          this.status = this.errorCodes.NONE;
        } else {
          this.stakeholders = StakeholderInfo.toStakeholderInfo(stakeholders, this.user);
          this.sort(this.stakeholders);
          this.stakeholders = this.publicStakeholders.concat(this.privateStakeholders);
          this.stakeholdersSlider = {
            stakeholders: this.slider(this.stakeholders),
            funders: this.slider(this.funders),
            ris: this.slider(this.ris),
            organizations: this.slider(this.organizations)
          };
        }
        this.loading = false;
      },
      error => {
        this.status = this.handleError("Error getting stakeholders", error);
        this.loading = false;
      }
    ));
  }
  
  private sort(results: StakeholderInfo[]) {
    results.sort((left, right): number => {
      if (left.name > right.name) {
        return 1;
      } else if (left.name < right.name) {
        return -1;
      } else {
        return 0;
      }
    })
  }
  
	public slider(stakeholders: StakeholderInfo[], size: number = 6): StakeholderInfo[][] {
    let slider: StakeholderInfo[][] = [];
    for(let i = 0; i < (stakeholders.length/size); i++) {
      slider.push(stakeholders.slice(i*size, ((i+1)*size)));
    }
    return slider;
  }
  
  get publicStakeholders(): StakeholderInfo[] {
    return this.stakeholders.filter(stakeholder => stakeholder.visibility === "PUBLIC");
  }

  get privateStakeholders(): StakeholderInfo[] {
    return this.stakeholders.filter(stakeholder => stakeholder.visibility !== "PUBLIC");
  }
  
  get funders(): StakeholderInfo[] {
		if(this.stakeholders) {
			return this.stakeholders.filter(stakeholder => stakeholder.type === "funder");
		} else {
			return [];
		}
  }

	get ris(): StakeholderInfo[] {
		if(this.stakeholders) {
			return this.stakeholders.filter(stakeholder => stakeholder.type === "ri");
		} else {
			return [];
		}
  }

	get organizations(): StakeholderInfo[] {
		if(this.stakeholders) {
			return this.stakeholders.filter(stakeholder => stakeholder.type === "organization");
		} else {
			return [];
		}
  }

  ngOnDestroy() {
    this.subscriptions.forEach(subscription => {
      if (subscription instanceof Subscriber) {
        subscription.unsubscribe();
      }
    });
  }
  
  private handleError(message: string, error): number {
    let code = "";
    if (!error.status) {
      code = error.code;
    } else {
      code = error.status;
    }
    console.error("Home Component: " + message, error);
    return this.errorMessages.getErrorCode(code);
  }
}