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

import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/catch';
import 'rxjs/add/operator/map';

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


@Injectable()
export class Config {

    private _config: Object;
    private _env: Object;

    constructor(private http: Http) {}

    load() {
        console.log('Load configuration...');
        return new Promise((resolve, reject) => {
            this.http.get('src/app/config/env.json')
                .map(res => res.json())
                .subscribe((env_data) => {
                    this._env = env_data;
                    this.http.get('src/app/config/' + env_data.configFileName + '.json')
                        .map(res => res.json())
                        .catch((error: any) => {
                            console.error(error);
                            return Observable.throw(error.json().error || 'Server error');
                        })
                        .subscribe((data) => {
                            this._config = data;
                            console.log('Loading is complete...', data);
                            resolve(true);
                        });
                });
        });
    }

    getEnv(key: any) {
        return this._env[key];
    }

    get(key: any) {
        console.log(this._config);
        return this._config[key];
    }
}