import React, { Component } from 'react';

import { connect } from 'react-redux';

import { bindActionCreators } from 'redux';

import '../App.css';

import './Login.css';

import Navbar from './Navbar';

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

class Login extends Component {

  state = {

    username: '',

    password: ''

  }

  handleInputChange = (e) => {

    const target = e.target;

    const value = target.value;

    const name = target.name;

    this.setState({

      [name]: value

    });

  }

  login = () => {

    const { username, password } = this.state;

    this.props.authActions.loginSubmit(username, password);

  }

  submit = (e) => {

    e.preventDefault();

    this.login();

  }

  onClickRegister = (e) => {

    e.preventDefault();

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

  }

  renderErrorMessage(errorMessages, fieldname) {

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

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

        <p className="help-block" key={ key }>{ message }</p>

      );

    }

  }

  renderNonFieldErrors(errorMessages) {

    if (errorMessages && errorMessages.has('non_field_errors')) {

      const errors = errorMessages.get('non_field_errors');

      return (

        <div class="alert alert-danger" role="alert">

        { errors.map((message, key) =>

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

        ) }

        </div>

      )

    }

  }

  render() {

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

    return (

      <div>

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

        <div className="container-fluid">

          <div className="row">

            <div className="col-md-6 col-md-offset-3">

              <div className="panel-login panel panel-default">

                <div className="panel-heading">

                  <h4 className="text-center panel-title">IRI Notes</h4>

                  <form onSubmit={this.submit}>

                    <div className="form-group" validationState={ errorMessages && errorMessages.has('username') ? 'error' : null }>

                      <label className="control-label">Nom d'utilisateur</label>

                      <input className="form-control" type="text" onChange={this.handleInputChange} name="username" />

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

                    </div>

                    <div className="form-group" validationState={ errorMessages && errorMessages.has('password') ? 'error' : null }>

                      <label className="control-label">Mot de passe</label>

                      <input className="form-control" type="password" onChange={this.handleInputChange} name="password" />

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

                    </div>

                    { this.renderNonFieldErrors(errorMessages) }

                    <button type="submit" className="btn btn-primary btn-lg">Se connecter</button>

                  </form>

                </div>

              </div>

              <p className="text-center">

                <a className="text-muted" href="/register" onClick={ this.onClickRegister }>Pas encore inscrit ? Créer un compte.</a>

              </p>

            </div>

          </div>

        </div>

      </div>

    );

  }

}

function mapStateToProps(state, props) {

  return {

    login: state.get('login')

  };

}

function mapDispatchToProps(dispatch) {

  return {

    authActions: bindActionCreators(authActions, dispatch)

  }

}

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