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} from 'rxjs';
import {EnvProperties} from '../../../utils/properties/env-properties';
import {animate, state, style, transition, trigger} from "@angular/animations";

@Component({
  selector: 'metrics',
  styleUrls: ['metrics.component.css'],
  template: `
    <div *ngIf="metrics && (pageViews >0 || metrics.totalViews > 0|| metrics.totalDownloads >0)" class="metrics"
         click-outside-or-esc (clickOutside)="close($event)"
         id="metrics" targetId="metrics">
      <div class="m-badge clickable" (click)="toggle($event)">
        <img src="assets/common-assets/logo-small-usage-counts.png">
        <div class="number">{{total | number}}</div>
      </div>
      <div class="widget" [@widget]="state.toString()">
        <div class="body">
          <div [@body]="state.toString()">
            <div *ngIf="entityType == 'projects'" class="uk-margin-bottom">
              <i class="uk-text-center">Project metrics
                are derived from aggregating individual research results metrics.
              </i>
            </div>
            <div class="uk-child-width-1-3@m uk-grid-small uk-grid-divider uk-grid-match" uk-grid>
              <div class="uk-text-center uk-first-column">
                <div class="number">{{metrics.totalDownloads | number}}</div>
                <div>Downloads</div>
              </div>
              <div class="uk-text-center">
                <div class="number">{{pageViews | number}}</div>
                <div>OpenAIRE views</div>
              </div>
              <div class="uk-text-center">
                <div class="number">{{metrics.totalViews | number}}</div>
                <div>Total views</div>
              </div>
            </div>
            <div *ngIf="(metrics.totalViews > 0 && viewsFrameUrl) || (metrics.totalDownloads > 0 && downloadsFrameUrl)"
                 [@charts]="state.toString()"
                 class="charts uk-visible-toggle" tabindex="-1" uk-slider>
              <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-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>
                </li>
                <li #element>
                  <i-frame *ngIf="metricsClicked && metrics.totalViews > 0 && viewsFrameUrl"
                           [height]="200"
                           [url]=viewsFrameUrl>
                  </i-frame>
                </li>
                <li #element>
                  <i-frame *ngIf="metricsClicked && metrics.totalDownloads > 0 && downloadsFrameUrl"
                           [height]="200"
                           [url]=downloadsFrameUrl>
                  </i-frame>
                </li>
              </ul>
              <div class="uk-text-right uk-margin-small-top">
                <a href="#" uk-slidenav-previous uk-slider-item="previous"></a>
                <a href="#" class="space" uk-slidenav-next uk-slider-item="next"></a>
              </div>
            </div>
          </div>
        </div>
        <div class="footer uk-flex uk-flex-middle" [@footer]="state.toString()">
          <span>Powered by</span>
          <img width="120" src="assets/common-assets/logo-large-usage-counts.png">
        </div>
      </div>
    </div>
  `,
  animations: [
    trigger('widget', [
      state('-1', style({
        width: '150px',
        opacity: 0,
        height: '60px',
      })),
      state('0', style({
        width: '150px',
        opacity: 0,
        height: '60px',
        "margin-top": '-25px'
      })),
      state('1', style({
        width: '150px',
        opacity: 1,
        height: '60px',
      })),
      state('2', style({
        width: '350px',
        height: 'auto',
      })),
      state('3', style({
        width: '350px',
        height: 'auto',
      })),
      state('4', style({
        width: '350px',
        height: 'auto',
      })),
      transition('0 => 1', [
        animate('300ms ease-out')
      ]),
      transition('1 => 2', [
        animate('400ms cubic-bezier(.18,.89,.56,1)')
      ])
    ]),
    trigger('body', [
      state('2', style({
        opacity: 1,
        height: 'auto',
      })),
      state('3', style({
        opacity: 1,
        height: 'auto'
      })),
      state('4', style({
        opacity: 1,
        height: 'auto'
      })),
      transition('* => 2', [
        animate('400ms cubic-bezier(.18,.89,.56,1)')
      ])
    ]),
    trigger('charts', [
      state('3', style({
        opacity: 1
      })),
      state('4', style({
        opacity: 1
      })),
      transition('* => 3', [
        animate('800ms ease-out')
      ])
    ]),
    trigger('footer', [
      state('4', style({
        transform: 'translateY(0)'
      })),
      transition('3 => 4', [
        animate('800ms ease-out')
      ])
    ])
  ]
})

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