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

@Injectable()
export class SadeeService {

    //private username = 'admin';
    //private password = 'admin';

    private http: Http;

    private loginUrl = '/login';
    private changePasswordUrl = '/profile';
    private checkDBUrl = '/isDbEmpty';
    private signupUrl = '/register';
    private logoutUrl = '/logout';
    private updateUrl = '/update-caee';


    private loggedUser;
    private loggedToken;

    constructor(http: Http) {
        this.http = http;
    }



    checkLogin(username, password, callback){
        const loginData = {username: username, password: password};
        this.http.post(this.loginUrl, loginData)
        .map( (response : Response) =>{
            return response;
        } )
        .subscribe(
            (data) => {
                callback(data.ok); // its bad to use the same function in case of success and failure
                const body = data.json();
                this.loggedUser = body.username;
                this.loggedToken = body.token;
            },
            (data) => {

                callback(data.ok); // its bad to use the same function in case of success and failure
            }
        );
    }

    changePassword(oldPassword, newPassword){
        const passwordData = {oldPassword: oldPassword, newPassword: newPassword, token: this.loggedToken, username: this.loggedUser};
        this.http.patch(this.changePasswordUrl, passwordData)
        .map( (response : Response) =>{
            return response;
        } )
        .subscribe(
            (data) => {
                window.confirm('Senha alterada com sucesso!');

            },
            (data) => {
                window.alert('Senha atual não correspondente!');
            }
        );

    }

    signup(username, password, confirmation, callback){
        const registerData = {username: username, password:password, confirmation:confirmation};
        this.http.post(this.signupUrl, registerData)
        .map( (response : Response) =>{
            return response;
        } )
        .subscribe(
            (data) => {
                callback(data.ok);
            },
            (data) =>{
                callback(data.ok);
            }
        );


    }

    logout(callback){
        const logoutData = {token: this.loggedToken, username: this.loggedUser};
        this.http.post(this.logoutUrl, logoutData)
        .map( (response : Response) =>{
            return response;
        } )
        .subscribe(
            (data) => {
                callback();
            },
            (data) =>{

            }
        );

    }

    checkDB(callback){
        let result = false;
        this.http.get(this.checkDBUrl)
        .map( (response : Response) =>{
            return response;
        })
        .subscribe(
            (data) => {
                if (!data.json().isEmpty){
                    callback();
                }
            }
        );
        return result;
    }

    updateCAEE(loginData, callback, errHandler){
        this.http.post(this.updateUrl, loginData)
        .map( (response : Response) =>{
            return response;
        } )
        .subscribe(
            (data) => {
                callback();
            },
            (data) =>{
                errHandler();
            }
        );
    }
}