import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';
import { Router } from '@angular/router';

import { NotificationsService } from 'angular2-notifications';

import { AuthService } from '../core';
import {
  FormReactive,
  UserService,
  USER_USERNAME,
  USER_EMAIL,
  USER_PASSWORD
} from '../shared';

@Component({
  selector: 'my-signup',
  templateUrl: './signup.component.html'
})
export class SignupComponent extends FormReactive implements OnInit {
  error: string = null;

  form: FormGroup;
  formErrors = {
    'username': '',
    'email': '',
    'password': ''
  };
  validationMessages = {
    'username': USER_USERNAME.MESSAGES,
    'email': USER_EMAIL.MESSAGES,
    'password': USER_PASSWORD.MESSAGES,
  };

  constructor(
    private formBuilder: FormBuilder,
    private router: Router,
    private notificationsService: NotificationsService,
    private userService: UserService
  ) {
    super();
  }

  buildForm() {
    this.form = this.formBuilder.group({
      username: [ '', USER_USERNAME.VALIDATORS ],
      email:    [ '', USER_EMAIL.VALIDATORS ],
      password: [ '', USER_PASSWORD.VALIDATORS ],
    });

    this.form.valueChanges.subscribe(data => this.onValueChanged(data));
  }

  ngOnInit() {
    this.buildForm();
  }

  signup() {
    this.error = null;

    const { username, password, email } = this.form.value;

    this.userService.signup(username, password, email).subscribe(
      () => {
        this.notificationsService.success('Success', `Registration for ${username} complete.`);
        this.router.navigate([ '/videos/list' ]);
      },

      err => this.error = err.text
    );
  }
}