import { Injectable } from "@angular/core";
import { Http, Headers, HttpModule, Response } from "@angular/http";
import { Observable, throwError } from "rxjs";
import { catchError, map, tap } from "rxjs/operators";

import { User } from "./user.model";
import { Config } from "../config";

@Injectable()
export class UserService {
    constructor(private http: Http) { }

    register(user: User) {
        if (!user.email || !user.password) {
            return throwError("Please provide both an email address and password.");
        }

        return this.http.post(
            Config.apiUrl + "user/" + Config.appKey,
            JSON.stringify({
                username: user.email,
                email: user.email,
                password: user.password
            }),
            { headers: this.getCommonHeaders() }
        ).pipe(
            catchError(this.handleErrors)
        );
    }

    getCommonHeaders() {
        let headers = new Headers();
        headers.append("Content-Type", "application/json");
        headers.append("Authorization", Config.authHeader);
        return headers;
    }

    handleErrors(error: Response) {
        console.log(JSON.stringify(error.json()));
        return Observable.throw(error);
    }
}