import { Injectable } from '@angular/core';
import { Http } from '@angular/http';
import 'rxjs/add/operator/map';

@Injectable()
export class ProfileService {

  idMap: any;
  profiles: any;

  constructor(private http: Http) {
    this.idMap = {};
    this.profiles = null;
  }

  load() {
    if (this.profiles) {
      return Promise.resolve(this.profiles);
    }

    return new Promise(resolve => {
      this.http.get('/assets/data/profiles.json')
        .map(res => res.json())
        .subscribe(data => {
          this.profiles = data;
          this.profiles.reduce((map, profile, i) => {
            map[profile._id] = i;
            return map;
          }, this.idMap);
          resolve(this.profiles);
        });
    });
  }

  getProfiles() {
    return this.profiles;
  }

  getProfileById(id) {
    return this.profiles[this.idMap[id]];
  }
}