import { Injectable } from '@angular/core';
import { Http } from '@angular/http';

import { StatementBaseService } from './statement.base.service';

import { Road } from '../models/road';
import {Way} from "../models/way";
import {Node} from "../models/node";
import {id} from "@swimlane/ngx-charts/release/utils/id";

@Injectable()
export class RoadService extends StatementBaseService {
  protected url: string = 'http://localhost:5000/road';
  constructor(protected http: Http) {
    super(http);
  }
  public createModel(): Object {
    return new Road();
  }
  public getRelation(id: number): Promise<any> {
      return this.http.get(this.url + '/relation?id=' + id, { headers: this.headers })
          .toPromise()
          .then(x => this.decodeWays(x.json()))
          .catch(this.handleError);
  }
  protected parseModels(json: any): any[] {
     return json.roadEditDsM as Road[];
  };
  protected parseModel(json: any): any {
     return json as Road;
  };
  protected decodeWays(json: Object[]): Way[] {
      let result: Way[] = [];
      json.forEach((way: Way) => {
          let nodes: Node[] = [];
          way.nodes.forEach((node: Node) => {
              let nodeObj: Node = new Node();
              nodeObj.id = node.id;
              nodeObj.index = node.index;
              nodeObj.lat = node.lat;
              nodeObj.lon = node.lon;
              nodes.push(nodeObj);
          });
          let wayObj: Way = new Way();
          wayObj.id = way.id;
          wayObj.nodes = nodes;
          result.push(wayObj);
      });
      return result;
  }
}