import React, { Component } from 'react';

import { connect } from 'react-redux';

import { bindActionCreators } from 'redux';

import { Grid, Row, Col, Panel, FormGroup, ControlLabel, FormControl, Button, HelpBlock } from 'react-bootstrap';

import '../App.css';

import Navbar from './Navbar';

import * as authActions from '../actions/authActions';

class Register extends Component {

  register = () => {

    const username = this.username.value;

    const email = this.email.value;

    const password1 = this.password1.value;

    const password2 = this.password2.value;

    this.props.authActions.registerSubmit(username, email, password1, password2);

  }

  submit = (e) => {

    e.preventDefault();

    this.register();

  }

  onClickLogin = (e) => {

    e.preventDefault();

    this.props.history.push('/login');

  }

  renderErrorMessage(errorMessages, fieldname) {

    if (errorMessages && errorMessages.has(fieldname)) {

      return errorMessages.get(fieldname).map((message, key) =>

        <HelpBlock key={ key }>{ message }</HelpBlock>

      );

    }

  }

  render() {

    const panelHeader = (

      <h4 className="text-uppercase text-center">Register</h4>

    )

    const errorMessages = this.props.register.get('errorMessages');

    return (

      <div>

        <Navbar history={this.props.history} />

        <Grid fluid>

          <Row>

            <Col md={6} mdOffset={3}>

              <Panel header={ panelHeader } className="panel-login">

                <form onSubmit={this.submit}>

                  <FormGroup validationState={ errorMessages && errorMessages.has('username') ? 'error' : null }>

                    <ControlLabel>Username</ControlLabel>

                    <FormControl componentClass="input" type="text" inputRef={ref => { this.username = ref; }} />

                    { this.renderErrorMessage(errorMessages, 'username') }

                  </FormGroup>

                  <FormGroup validationState={ errorMessages && errorMessages.has('email') ? 'error' : null }>

                    <ControlLabel>Email</ControlLabel>

                    <FormControl componentClass="input" type="email" inputRef={ref => { this.email = ref; }} />

                    { this.renderErrorMessage(errorMessages, 'email') }

                  </FormGroup>

                  <FormGroup validationState={ errorMessages && errorMessages.has('password1') ? 'error' : null }>

                    <ControlLabel>Password</ControlLabel>

                    <FormControl componentClass="input" type="password" inputRef={ref => { this.password1 = ref; }} />

                    { this.renderErrorMessage(errorMessages, 'password1') }

                  </FormGroup>

                  <FormGroup validationState={ errorMessages && errorMessages.has('password2') ? 'error' : null }>

                    <ControlLabel>Confirm password</ControlLabel>

                    <FormControl componentClass="input" type="password" inputRef={ref => { this.password2 = ref; }} />

                    { this.renderErrorMessage(errorMessages, 'password2') }

                  </FormGroup>

                  <Button type="submit" block bsStyle="primary" onClick={this.register}>Register</Button>

                </form>

              </Panel>

              <p className="text-center">

                <a className="text-muted" href="/login" onClick={ this.onClickLogin }>Already registered? Sign in.</a>

              </p>

            </Col>

          </Row>

        </Grid>

      </div>

    );

  }

}

function mapStateToProps(state, props) {

  return {

    register: state.get('register')

  };

}

function mapDispatchToProps(dispatch) {

  return {

    authActions: bindActionCreators(authActions, dispatch)

  }

}

export default connect(mapStateToProps, mapDispatchToProps)(Register);