'use strict';

var _ = require('lodash');
var request = require('axios');
var React = require('react');
var classSet = require('classnames');
var StripeCheckout = require('react-stripe-checkout').default;

var api = require('../api');
var Loader = require('./loader');
var config = require('../../config.js')();

var fieldNameTranslations = {
  address: { fi: 'Osoite' },
  city: { fi: 'Paikkakunta' },
  email: { fi: 'Sähköpostiosoite' },
  handle: { fi: 'Slack-käyttäjätunnus ' },
  name: { fi: 'Koko nimi ' },
  postcode: { fi: 'Postinumero' }
};

function validateEmail(email) {
  var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
  return re.test(email);
}

const fieldNames = ['name', 'email', 'handle', 'address', 'postcode', 'city'];

function getUserInfo(state) {
  return _.pick(state, fieldNames);
}

module.exports = React.createClass({

  getInitialState() {
    return {
      address: '',
      city: '',
      email: '',
      handle: '',
      name: '',
      postcode: '',
      sending: false,
      pristineFields: fieldNames
    };
  },
  onSubmit(token) {
    this.setState({
      sending: true,
      error: null
    });

    request.post(api('membership'), {
      userInfo: getUserInfo(this.state),
      stripeToken: token.id
    })
      .then(() => {
        this.setState({ sending: false });
        this.props.onPaymentSuccess();
      })
      .catch((err) => {
        this.setState({ error: err, sending: false });
      });
  },
  onChange(e) {
    var name = e.target.name;
    if (e.target.value === this.state[name]) {
      return;
    }

    this.setState({
      [e.target.name]: e.target.value,
      pristineFields: this.state.pristineFields.filter((fieldName) => fieldName !== name),
      errors: []
    });
  },

  getDataErrors() {
    var foundErrors = [];

    fieldNames.forEach((fieldName) => {
      if (!this.state[fieldName]) {
        foundErrors.push({ field: fieldName, type: 'missing' });
      }
    });

    if (this.state.email && !validateEmail(this.state.email)) {
      foundErrors.push({ field: 'email', type: 'invalid' });
    }

    return foundErrors;
  },

  render() {
    const inputErrors = this.getDataErrors();

    var formClasses = classSet({
      'form': true,
      'membership-form': true,
      'has-error': inputErrors.length !== 0 || this.state.error,
      'sending': this.state.sending
    });

    function getErrorMessage(err) {
      var feedbackText;

      if (err.type === 'missing') {
        feedbackText = `${fieldNameTranslations[err.field].fi} on pakollinen.`;
      } else if (err.type === 'invalid') {
        feedbackText = `${fieldNameTranslations[err.field].fi} on virheellinen.`;
      }

      return <div key={err.field} className='form--message'>{feedbackText}</div>;
    }

    /* generate error messages */
    var visibleErrors = inputErrors
      .filter((error) => this.state.pristineFields.indexOf(error.field) === -1);

    var fieldsWithErrors = visibleErrors.map(({ field }) => field);

    var inputFields = fieldNames.map((fieldName) => {
      var inputClasses = classSet({
        'input': true,
        'has-error': _.includes(fieldsWithErrors, fieldName),
        'half': fieldName === 'city' || fieldName === 'postcode',
        'left': fieldName === 'postcode'
      });

      function showsErrorFor(field) {
        if (fieldName === 'city') {
          return false;
        }

        return field === fieldName || fieldName === 'postcode' && field === 'city';
      }

      return (
        <span key={fieldName}>
          <input
            className={inputClasses}
            type={fieldName === 'email' ? 'email' : 'text'}
            name={fieldName}
            placeholder={fieldNameTranslations[fieldName].fi}
            value={this.state[fieldName]}
            onChange={this.onChange} />
          {
            visibleErrors
              .filter(({ field }) => showsErrorFor(field))
              .map(getErrorMessage)

          }
        </span>
      );
    });
    if (this.state.sending) {
      return (
        <div className='membership-form__loader'>
          <Loader />
        </div>
      );
    }
    return (
      <div>
        <h3>Liity jäseneksi</h3>
        <form className={formClasses}>
          {inputFields}
          {this.state.error && (
            <div className='form--message'>
              Jotain meni pieleen! Ota yhteyttä info@koodiklinikka.fi
            </div>
          )}
          <br />
          <StripeCheckout
            amount={1000}
            currency='EUR'
            description='Jäsenmaksu'
            email={this.state.email}
            image='https://avatars3.githubusercontent.com/u/10520119?v=3&s=200'
            locale='fi'
            name='Koodiklinikka ry'
            stripeKey={config.stripe.publicKey}
            token={this.onSubmit}
          >
            <button
              type='button'
              disabled={inputErrors.length !== 0}
              className='btn btn__submit'>
              Siirry maksamaan
            </button>
          </StripeCheckout>
          <p>
            <small>Seuraava vuosimaksu veloitetaan automaattisesti <br />kortiltasi vuoden kuluttua.</small>
          </p>
        </form>
      </div>
    );
  }
});