import { Injectable, Inject, EventEmitter } from '@angular/core';
import { Control } from '../interface/control';
import { Layer, Source} from '../class/class';


import mapboxgl from 'mapbox-gl';

@Injectable()
export class MapboxService {
  private accessToken: String;

  constructor( @Inject('MAPBOX_KEY') _config: String) {
    mapboxgl.accessToken = _config;
  }

  public createMap(options: Object): Object {
    return new mapboxgl.Map(options);
  }

  /**
   * Handle genenral control of the map
   */
  public addControl(map: any, control: Control, position?: string): void {
    if (position) {
      map.addControl(control, position);
    } else {
      map.addControl(control);
    }
  }

  public removeControl(map:mapboxgl.Map, control : Control):void{
    map.removeControl(control);
  }

  /**
   * Handle navigation control of the map
   */
  public addNavigationControl(map: any, position: string): Control {
    let control : Control = new mapboxgl.NavigationControl();
    map.addControl(control, position);
    return control;
  }

  /**
   * Handle scale control of the map
   */
  public addScaleControl(map: mapboxgl.Map, position: string, options?: { maxWidth?: number, unit?: string }): Control {
    let control : Control = new mapboxgl.ScaleControl(options);
    map.addControl(control, position);
    return control;
  }


  /**
   * Handle layers
   */
  public addLayer(map: mapboxgl.Map, layer: Layer) {
    if(map.getSource(layer.source)){
      map.addLayer(layer.toJSON());
    }
  }

  public removeLayer(map: mapboxgl.Map, layer: Layer) {
    if (map.getLayer(layer.id)) {
      map.removeLayer(layer.id);
    }
  }

  /**
   * Handle sources
   */
   public addSource(map: mapboxgl.Map,source:Source):void{
     map.addSource(source.id,source.toJson());
   }
   public removeSource(map: mapboxgl.Map,source:Source):void{
     if(map.isSourceLoaded(source.id)){
       map.removeSource(source.id);
     }
   }

   public addListener(map,event,listener){
     map.on(event,listener);
   }

   public addListenerOnce(map,event,listener){
     map.once(event,listener);
   }

   public removeListener(map,event,listener){
     map.off(event,listener);
   }
}