import {Component, Input, Output, EventEmitter, ChangeDetectorRef} from '@angular/core';
import {Metrics} from '../../../utils/entities/metrics';
import {MetricsService} from '../../../services/metrics.service';
import {ErrorCodes} from '../../../utils/properties/errorCodes';

import {Subscription, zip} from 'rxjs';
import {EnvProperties} from '../../../utils/properties/env-properties';
import {ClickEvent} from "../../../utils/click/click-outside-or-esc.directive";
import {NumberUtils} from "../../../utils/number-utils.class";
import {OpenaireEntities} from "../../../utils/properties/searchFields";

@Component({
  selector: 'metrics',
  template: `
    <div *ngIf="metrics && (pageViews >0 || metrics.totalViews > 0|| metrics.totalDownloads >0)" class="metrics">
      <a class="m-badge uk-link-reset uk-display-block" (click)="clickedMetrics()">
        <img src="assets/common-assets/logo-small-usage-counts.png" loading="lazy" alt="usage counts">
        <div class="uk-margin-xsmall-top uk-text-primary uk-text-small uk-text-bold uk-text-center">
          <ng-container *ngIf="isNumberLarge(total, true); else notFormattedTotal">{{formatNumber(total)}}</ng-container>
          <ng-template #notFormattedTotal>{{total | number}}</ng-template>
        </div>
      </a>
      <div class="uk-dropdown uk-background-default" uk-dropdown="pos: right-top; mode: click; offset: 30; animation: uk-animation-fade">
        <div class="uk-padding-small uk-width-large@s uk-width-medium">
          <div *ngIf="entityType == 'projects'" class="uk-alert uk-alert-primary uk-margin-small-bottom">
            <span class="uk-text-center uk-text-small">{{openaireEntities.PROJECT}} metrics
              are derived from aggregating individual {{openaireEntities.RESULTS}} metrics.
            </span>
          </div>
          <div class="uk-child-width-1-3@m uk-grid-small uk-grid-divider uk-margin-top" uk-grid>
            <div class="uk-text-center">
              <div class="number uk-text-bold uk-text-background">
                <ng-container *ngIf="metrics.totalDownloads == 0">-</ng-container>
                <span *ngIf="metrics.totalDownloads > 0" [attr.uk-tooltip]="metrics.totalDownloads >= 1000 ? 'cls: uk-active' : 'cls: uk-invisible'" 
                      title="{{metrics.totalDownloads | number}}">{{formatNumber(metrics.totalDownloads)}}</span>
<!--                <ng-container *ngIf="isNumberLarge(metrics.totalDownloads); else notFormattedDownloads">{{formatNumber(metrics.totalDownloads)}}</ng-container>-->
<!--                <ng-template #notFormattedDownloads>{{metrics.totalDownloads | number}}</ng-template>-->
              </div>
              <div>Downloads</div>
            </div>
            <div class="uk-text-center">
              <div class="number uk-text-bold uk-text-background">
                <ng-container *ngIf="pageViews == 0">-</ng-container>
                <span *ngIf="pageViews > 0" [attr.uk-tooltip]="pageViews >= 1000 ? 'cls: uk-active' : 'cls: uk-invisible'"
                      title="{{pageViews | number}}">{{formatNumber(pageViews)}}</span>
<!--                <ng-container *ngIf="isNumberLarge(pageViews); else notFormattedPageviews">{{formatNumber(pageViews)}}</ng-container>-->
<!--                <ng-template #notFormattedPageviews>{{pageViews | number}}</ng-template>-->
              </div>
              <div>OpenAIRE views</div>
            </div>
            <div class="uk-text-center">
              <div class="number uk-text-bold uk-text-background">
                <ng-container *ngIf="metrics.totalViews == 0">-</ng-container>
                <span *ngIf="metrics.totalViews > 0" [attr.uk-tooltip]="metrics.totalViews >= 1000 ? 'cls: uk-active' : 'cls: uk-invisible'" 
                      title="{{metrics.totalViews | number}}">{{formatNumber(metrics.totalViews)}}</span>
<!--                <ng-container *ngIf="isNumberLarge(metrics.totalViews); else notFormattedTotalviews">{{formatNumber(metrics.totalViews)}}</ng-container>-->
<!--                <ng-template #notFormattedTotalviews>{{metrics.totalViews | number}}</ng-template>              -->
              </div>
              <div>Total views</div>
            </div>
          </div>
          <div class="uk-padding">
            <div *ngIf="metricsClicked && (metrics.infos?.size > 0 || (metrics.totalViews > 0 && viewsFrameUrl) || (metrics.totalDownloads > 0 && downloadsFrameUrl))"
                 class="uk-position-relative uk-visible-toggle uk-slider uk-margin-small-top" tabIndex="1" uk-slider>
              <div class="uk-slider-container">
                <ul class="uk-slider-items uk-child-width-1-1">
                  <li *ngIf="metrics && metrics.infos.size > 0" class="uk-overflow-auto" style="height: 200px">
                    <table
                        class="uk-table uk-table-small uk-table-striped">
                      <thead>
                      <tr>
                        <th class="uk-text-center uk-text-bold">From</th>
                        <th class="uk-text-center  uk-text-bold">Views</th>
                        <th class="uk-text-center  uk-text-bold">Downloads</th>
                      </tr>
                      </thead>
                      <tbody>
                      <tr *ngFor="let key of getKeys(metrics.infos)">
                        <td class="uk-width-1-3 uk-text-center uk-text-truncate" uk-tooltip [title]="metrics.infos.get(key).name">
                          <a href="{{metrics.infos.get(key).url}}">
                            {{metrics.infos.get(key).name}}
                          </a>
                        </td>
                        <td class="uk-text-center">
                          <ng-container *ngIf="isNumberLarge(metrics.infos.get(key).numOfViews, true); else notFormattedNumViews">{{formatNumber(metrics.infos.get(key).numOfViews)}}</ng-container>
                          <ng-template #notFormattedNumViews>{{metrics.infos.get(key).numOfViews | number}}</ng-template>
                          <!-- <span *ngIf="metrics.infos.get(key).numOfViews > 0 && metrics.infos.get(key).openaireViews > 0">
                           ( {{metrics.infos.get(key).openaireViews | number}} from OpenAIRE )
                         </span>-->
                        </td>
                        <td class="uk-text-center">
                          <ng-container *ngIf="isNumberLarge(metrics.infos.get(key).numOfDownloads, true); else notFormattedNumDownloads">{{formatNumber(metrics.infos.get(key).numOfDownloads)}}</ng-container>
                          <ng-template #notFormattedNumDownloads>{{metrics.infos.get(key).numOfDownloads | number}}</ng-template>
                          <!--<span *ngIf="metrics.infos.get(key).numOfDownloads > 0 && metrics.infos.get(key).openaireDownloads > 0">
                          ( {{metrics.infos.get(key).openaireDownloads | number}} from OpenAIRE )
                        </span>-->
                        </td>
                      </tr>
                      </tbody>
                    </table>
                  </li>
                  <!--                remove check for datasources when with the new charts -->
                  <li *ngIf="metricsClicked && metrics.totalViews > 0 && viewsFrameUrl">
                    <i-frame [height]="200" [url]=viewsFrameUrl [addClass]="false" 
                             customContainerClass="uk-background-default" customIframeClass="uk-blend-multiply"></i-frame>
                  </li>
                  <li *ngIf="metricsClicked && metrics.totalDownloads > 0 && downloadsFrameUrl">
                    <i-frame [height]="200" [url]=downloadsFrameUrl [addClass]="false" 
                             customContainerClass="uk-background-default" customIframeClass="uk-blend-multiply"></i-frame>
                  </li>
                </ul>
              </div>
              <a class="uk-position-center-left-out" uk-slider-item="previous"><span uk-icon="icon: chevron-left; ratio: 2"></span></a>
              <a class="uk-position-center-right-out" uk-slider-item="next"><span uk-icon="icon: chevron-right; ratio: 2"></span></a>
            </div>
          </div>
          <div class="uk-flex uk-flex-center uk-flex-middle">
            <span class="uk-margin-small-right uk-text-small uk-text-meta">Powered by</span>
            <a href="https://usagecounts.openaire.eu" target="_blank">
              <img width="120" src="assets/common-assets/logo-large-usage-counts.png" loading="lazy" alt="usage counts">
            </a>
          </div>
        </div>
      </div>
    </div>
  `,
  styleUrls: ['metrics.component.less']
})

export class MetricsComponent {
  @Output() metricsResults = new EventEmitter();
  @Input() id: string;
  @Input() entityType: string;
  @Input() entity: string;
  //@Input() name: string = "";
  @Input() pageViews: number = 0;
  @Input() properties: EnvProperties;
  @Input() shortView: boolean = false;
  @Input() open = false;
  @Input() viewsFrameUrl: string;
  @Input() downloadsFrameUrl: string;

  public metrics: Metrics;
  public errorCodes: ErrorCodes;
  private sub: Subscription;
  private timeouts: any[] = [];

  public metricsClicked: boolean = false;

  public status: number;
  public state: number = -1;
  public openaireEntities = OpenaireEntities;

  constructor(private metricsService: MetricsService, private cdr: ChangeDetectorRef) {
  }

  ngOnInit() {
    this.errorCodes = new ErrorCodes();
    if (typeof document !== 'undefined') {
      this.status = this.errorCodes.LOADING;
      this.getMetrics();
    }
  }

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

  public get total(): number {
    return +this.pageViews + +this.metrics.totalViews + +this.metrics.totalDownloads;
  }

  private getMetrics() {
    //queries from old API - replaced with queries to the stats tool
    /*  this.sub = this.metricsService.getMetrics(this.id, this.entityType, this.properties).subscribe(
        data => {
          this.metrics = data;
          this.cdr.detectChanges();
          this.status = this.errorCodes.DONE;
          this.metricsResults.emit({
            totalViews: this.metrics.totalViews,
            totalDownloads: this.metrics.totalDownloads,
            pageViews: this.metrics.pageViews
          });
        },
        err => {
          if (err.status == '404') {
            this.status = this.errorCodes.NOT_FOUND;
          } else if (err.status == '500') {
            this.status = this.errorCodes.ERROR;
          } else {
            this.status = this.errorCodes.NOT_AVAILABLE;
          }
          this.metricsResults.emit({
            totalViews: 0,
            totalDownloads: 0
          });
        }
      );*/
      let obs;
      if (this.entityType == "results") {
        obs = zip(this.metricsService.getMetricsNumber(this.id, "usagestats.results.views", this.properties),
          this.metricsService.getMetricsNumber(this.id, "usagestats.results.downloads", this.properties),
            this.metricsService.getMetricsNumber(this.id, "usagestats.results.views.openaire", this.properties),
          this.metricsService.getMetricsNumbersByRepository(this.id, "usagestats.results.viewsdownloads.repository", this.properties)

        );

      } else if (this.entityType == "projects") {
        obs = zip(this.metricsService.getMetricsNumber(this.id, "usagestats.projects.views", this.properties),
          this.metricsService.getMetricsNumber(this.id, "usagestats.projects.downloads", this.properties),
          this.metricsService.getMetricsNumber(this.id, "usagestats.projects.views.openaire", this.properties));

      } else if (this.entityType == "datasources") {
        obs = zip(this.metricsService.getMetricsNumber(this.id, "usagestats.views.repository.local", this.properties),
          this.metricsService.getMetricsNumber(this.id, "usagestats.downloads.repository.local", this.properties),
          this.metricsService.getMetricsNumber(this.id, "usagestats.views.openaire", this.properties),
          // this.metricsService.getMetricsNumber(this.id, "usagestats.downloads.repository.openaire", this.properties)
        );

      }

      this.sub = obs.subscribe(
        data => {
          this.metrics = new Metrics();
          this.metrics.infos = new Map<string, { "name": string, "url": string, "numOfDownloads": string, "numOfViews": string, "openaireDownloads": string, "openaireViews": string }>();
          this.metrics.totalViews = data[0] ? data[0] : 0;
          this.metrics.totalDownloads = data[1] ? data[1] : 0;
          this.metrics.pageViews = data[2] ? data[2] : 0;
          this.metrics.infos = data[3] ? data[3] : 0;
          this.cdr.detectChanges();
          this.status = this.errorCodes.DONE;
          this.metricsResults.emit({
            totalViews: this.metrics.totalViews,
            totalDownloads: this.metrics.totalDownloads,
            pageViews: this.metrics.pageViews
          });
        },
        err => {
          if (err.status == '404') {
            this.status = this.errorCodes.NOT_FOUND;
          } else if (err.status == '500') {
            this.status = this.errorCodes.ERROR;
          } else {
            this.status = this.errorCodes.NOT_AVAILABLE;
          }
          this.metricsResults.emit({
            totalViews: 0,
            totalDownloads: 0,
            pageViews: 0
          });
        }
      );
  }

  public close(event: ClickEvent) {
    if(event.clicked && this.state !== -1) {
      this.timeouts.forEach(timeout => {
        clearTimeout(timeout);
      });
      this.state = -1;
      this.timeouts = [];
    }
  }

  public clickedMetrics() {
    setTimeout( () => {
      this.metricsClicked = true;
    });
  }

  public toggle(event) {
    this.metricsClicked = true;

    event.stopPropagation();
    if(this.state !== -1) {
      this.timeouts.forEach(timeout => {
        clearTimeout(timeout);
      });
      this.state = -1;
      this.timeouts = [];
    } else {
      this.state++;
      this.timeouts.push(setTimeout(() => {
        this.state++;
        this.timeouts.push(setTimeout(() => {
          this.state++;
          this.timeouts.push(setTimeout(() => {
            this.state++;
            this.timeouts.push(setTimeout(() => {
              this.state++;
            }, 400));
          }, 800));
        }, 300));
      }, 100));
    }
    this.cdr.detectChanges();
  }

  public getKeys(map) {
    return Array.from(map.keys());
  }

  public isNumberLarge(num: number | string, bigNum: boolean = false) {
    let limit: number = bigNum ? 100000000 : 100000;
    return (+num) >= limit;
  }

  public formatNumber(num: number | string) {
    let formatted = NumberUtils.roundNumber(+num);
    return formatted.number + formatted.size;
  }
}