import React, { Component, PropTypes } from 'react';

import { FormattedMessage as Message } from 'react-intl';
import Helmet from 'react-helmet';

import { Input, Button, Form, FormModel } from 'components/ui/form';
import { BackButton } from 'components/profile/ProfileForm';
import styles from 'components/profile/profileForm.scss';

import messages from './ChangeUsername.intl.json';

export default class ChangeUsername extends Component {
    static displayName = 'ChangeUsername';

    static propTypes = {
        username: PropTypes.string.isRequired,
        form: PropTypes.instanceOf(FormModel),
        onChange: PropTypes.func.isRequired,
        onSubmit: PropTypes.func.isRequired
    };

    static get defaultProps() {
        return {
            form: new FormModel()
        };
    }

    render() {
        const {form, username} = this.props;

        return (
            <Form onSubmit={this.onFormSubmit}
                form={form}
            >
                <div className={styles.contentWithBackButton}>
                    <BackButton />

                    <div className={styles.form}>
                        <div className={styles.formBody}>
                            <Message {...messages.changeUsernameTitle}>
                                {(pageTitle) => (
                                    <h3 className={styles.title}>
                                        <Helmet title={pageTitle} />
                                        {pageTitle}
                                    </h3>
                                )}
                            </Message>

                            <div className={styles.formRow}>
                                <p className={styles.description}>
                                    <Message {...messages.changeUsernameDescription} />
                                </p>
                            </div>

                            <div className={styles.formRow}>
                                <Input {...form.bindField('username')}
                                    value={username}
                                    onChange={this.onUsernameChange}
                                    required
                                    skin="light"
                                />
                            </div>

                            <div className={styles.formRow}>
                                <p className={styles.description}>
                                    <Message {...messages.changeUsernameWarning} />
                                </p>
                            </div>
                        </div>

                        <Button color="green" block label={messages.changeUsernameButton} type="submit" />
                    </div>
                </div>
            </Form>
        );
    }

    onUsernameChange = (event) => {
        this.props.onChange(event.target.value);
    };

    onFormSubmit = () => {
        this.props.onSubmit(this.props.form);
    };
}