import { Component, forwardRef } from '@angular/core';
import { BasicDesc } from '../../services/basic-desc/basic-desc.service';
import { CesiumProperties } from '../../services/cesium-properties/cesium-properties.service';
import { ComputationCache } from '../../services/computation-cache/computation-cache.service';
import { LayerService } from '../../services/layer-service/layer-service.service';
import { LabelDrawerService } from '../../services/drawers/label-drawer/label-drawer.service';

/**
 *  This is a label implementation.
 *  The ac-label element must be a child of ac-layer element.
 *  The properties of props are the same as the properties of Entity and LabelGraphics:
 *  + https://cesiumjs.org/Cesium/Build/Documentation/Entity.html
 *  + https://cesiumjs.org/Cesium/Build/Documentation/LabelGraphics.html
 *
 *  __Usage :__
 *  ```
 *    <ac-label-desc props="{
 *      position: track.position,
 *      pixelOffset : [-15,20] | pixelOffset,
 *      text: track.name,
 *      font: '15px sans-serif'
 *    }">
 *    </ac-label-desc>
 *  ```
 */

@Component({
  selector: 'ac-label-desc',
  template: '',
  providers: [{provide: BasicDesc, useExisting: forwardRef(() => AcLabelDescComponent)}],
})
export class AcLabelDescComponent extends BasicDesc {

  constructor(labelDrawer: LabelDrawerService, layerService: LayerService,
              computationCache: ComputationCache, cesiumProperties: CesiumProperties) {
    super(labelDrawer, layerService, computationCache, cesiumProperties);
  }
}