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

import { Subscription }   from 'rxjs';
import{EnvProperties} from '../../utils/properties/env-properties';

@Component({
    selector: 'metrics',
    template: `
    <div *ngIf="!shortView">
      <errorMessages [status]="[status]" [type]="'metrics'" tab_error_class=true></errorMessages>

      <div *ngIf="metrics && pageViews == 0 && metrics.totalViews == 0 && metrics.totalDownloads == 0" class="uk-alert uk-alert-primary">
        No metrics available
      </div>
      <div *ngIf="metrics != undefined  && (pageViews >0 || metrics.totalViews > 0|| metrics.totalDownloads >0)" class="uk-child-width-1-3@m uk-grid-small uk-grid-match uk-grid" uk-grid="">
          <div *ngIf="entityType == 'projects'" class="uk-width-1-1 uk-text-center uk-text-meta uk-margin">Project metrics are derived from aggregating individual research results metrics.</div>
          <div class="metrics-openaire uk-first-column">
              <div class="uk-tile uk-tile-default uk-padding-small">
                <div class="uk-text-center">{{pageViews | number}}</div>
                <div class="uk-text-center">views in OpenAIRE</div>
              </div>
          </div>
          <div class="metrics-views">
              <div class="uk-tile uk-tile-muted uk-padding-small">
                  <div class="uk-text-center">  {{metrics.totalViews | number}}
                  <span *ngIf="metrics.totalViews > 0 && metrics.totalOpenaireViews > 0">
                  ( {{metrics.totalOpenaireViews | number}} from OpenAIRE )
                  </span></div>
                  <div  class="uk-text-center">views in local repository</div>
              </div>
          </div>
          <div class="metrics-downloads">
              <div class="uk-tile uk-tile-primary uk-padding-small">
                  <div class="uk-text-center">  {{metrics.totalDownloads | number}}
                  <span *ngIf="metrics.totalDownloads > 0 && metrics.totalOpenaireDownloads > 0">
                  ( {{metrics.totalOpenaireDownloads | number}} from OpenAIRE )
                  </span></div>
                  <div class="uk-text-center">downloads in local repository</div>
              </div>
          </div>

      </div>

      <p *ngIf="metrics != undefined && metrics.infos.size > 0" >The information is available from the following content providers: </p>
      <table *ngIf="metrics != undefined && metrics.infos.size > 0"
              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">Number Of Views</th>
                  <th class="uk-text-center  uk-text-bold">Number Of Downloads</th>
              </tr>
          </thead>
          <tbody>
              <tr *ngFor="let key of getKeys(metrics.infos)">
                  <td class="uk-text-center">
                      <a href="{{metrics.infos.get(key).url}}">
                          {{metrics.infos.get(key).name}}
                      </a>
                  </td>
                  <td class="uk-text-center">
                      {{metrics.infos.get(key).numOfViews | number}}
                      <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">
                      {{metrics.infos.get(key).numOfDownloads | number}}
                      <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>
    </div>
    <div *ngIf="shortView && metrics && (metrics.pageViews >0 || metrics.totalViews > 0|| metrics.totalDownloads >0)">
      <dl *ngIf="metrics" class="uk-description-list-line">
        <dt class="sideInfoTitle">Metrics</dt>
        <dd class="line" >
          {{metrics.pageViews | number}} views in OpenAIRE
        </dd>
        <dd class="line">
           {{metrics.totalViews | number}}
          <span *ngIf="metrics.totalViews > 0 && metrics.totalOpenaireViews > 0">
          ( {{metrics.totalOpenaireViews | number}} from OpenAIRE )
          </span>
          views in local repository
        </dd>
        <dd class="line">
          {{metrics.totalDownloads | number}}
          <span *ngIf="metrics.totalDownloads > 0 && metrics.totalOpenaireDownloads > 0">
          ( {{metrics.totalOpenaireDownloads | number}} from OpenAIRE )
          </span> downloads in local repository
        </dd>
      </dl>
    </div>
    `
    })

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;

    public metrics: Metrics;
    public errorCodes:ErrorCodes;
    private sub: Subscription;

    public status: number;

    constructor (private _metricsService: MetricsService) {}

    ngOnInit() {
        this.errorCodes = new ErrorCodes();
        this.status = this.errorCodes.LOADING;
        this.getMetrics();
    }

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

    private getMetrics() {
        //if(this.id == undefined || this.id == "") {
        //    console.log("supplied id in metrics is not acceptable");
        //}
        //if(this.type == undefined || this.type == "") {
        //    console.log("supplied id in metrics is not acceptable");
        //}

        this.sub = this._metricsService.getMetrics(this.id, this.entityType, this.properties).subscribe(
         data => {
             this.metrics = data;
             this.status = this.errorCodes.DONE;
             this.metricsResults.emit({
                 totalViews: this.metrics.totalViews,
                 totalDownloads: this.metrics.totalDownloads,
                 pageViews: this.metrics.pageViews
             });
         },
         err => {
           console.log(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
           });
         }
       );
    }

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