/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { Component, EventEmitter, HostListener, Input, OnInit, Output } from '@angular/core';
import { DatalakeRestService } from '../../../../core-services/datalake/datalake-rest.service';
import { DetectedBoxModel } from '../../../../app-transport-monitoring/model/detected-box.model';

@Component({
  selector: 'sp-image-bar',
  templateUrl: './image-bar.component.html',
  styleUrls: ['./image-bar.component.css']
})
export class ImageBarComponent implements OnInit {

  public _imageRoutes;

  @Input()
  set imagesRoutes(imageRoutes) {
    this.maxImages = imageRoutes.length;
    this._imageRoutes = imageRoutes;
  }
  @Input() selectedIndex: number;
  @Input() enableShortCuts: boolean;
  @Input() imagePreviewHeight = 65;

  @Output() indexChange: EventEmitter<number> = new EventEmitter<number>();

  public maxImages;


  constructor(public restService: DatalakeRestService) { }

  ngOnInit(): void {
  }

  changeImage(index) {
    this.indexChange.emit(index);
  }

  goToStart() {
    this.indexChange.emit(0);
  }

  previousImage() {
    if (this.selectedIndex < this._imageRoutes.length - 1) {
      this.indexChange.emit(this.selectedIndex + 1);
    }
  }

  nextImage() {
    if (this.selectedIndex > 0) {
      this.indexChange.emit(this.selectedIndex - 1);
    }
  }

  goToEnd() {
    this.indexChange.emit(this.maxImages - 1);
  }

  @HostListener('document:keydown', ['$event'])
  handleShortCuts(event: KeyboardEvent) {
    if (this.enableShortCuts && !event.repeat) {
      const key = event.key;
      switch (key.toLowerCase()) {
        case 'q':
          this.nextImage();
          break;
        case 'e':
          this.previousImage();
          break;
      }
    }
  }

}
