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

import 'rxjs/add/observable/of';
import 'rxjs/add/operator/map';
import {
    Observable,
} from 'rxjs/Observable';

import languageMap from './language-map.const';

@Injectable()
export default class LocationService {
    private _location: Observable<string>;

    constructor(
        private _http: Http,
    ) {
        this._location = Observable.of(navigator.language);
    }

    public getDefaultCurrencyCode(locationUrl: string): Observable<string> {
        return this._http.get(locationUrl)
            .map((resp) => {
                const currencyData = resp.json();
                return currencyData &&
                    currencyData.currency &&
                    currencyData.currency.code
                    ?
                        currencyData.currency.code
                        :
                        'GBP';
            });
    }

    public getDefaultLanguage(): Observable<string> {
        return this._location.map((location) => {
            const language = languageMap[location];
            return language ? language : 'en';
        });
    }
}