import React, { useEffect } from 'react';
import { useLocation, useHistory } from 'react-router-dom';

import Icon from './Icon';
import Button from './Button';
import Input from './Input';
import { useFormState } from 'react-use-form-state';

import { me, facebookLink, vkLink } from '../api';

import './Login.css';

/**
 * @typedef {Object} LoginProps
 * @property {import('../api').SecureUser} visitor
 * @property {function} onAuth
 */

/**
 * Login page
 * @param {LoginProps} props
 */
function Login({ visitor, onAuth }) {

    const location = useLocation();
    const history = useHistory();

    useEffect(() => {
        if (visitor.hash) {
            const {retpath } = location.state;
            console.log(retpath);
            history.push(retpath || '/');
        }
    }, [history, location.state, visitor]);

    const [formState, { text, password }] = useFormState();

    /**
     * @param {React.SyntheticEvent} event
     */
    let onSubmit = (event) => {
        event.preventDefault();
        me(formState.values.username, formState.values.password)
            .then(response => {
                onAuth(response);
            }
            ).catch(ex => {
                console.log(ex);
            });
    };
    return (
        <div className="msg-cont">
            <div className="dialoglogin">
                <p>Please, introduce yourself:</p>
                <div style={socialButtonsStyle}>
                    <a href={facebookLink()} style={facebookButtonStyle}>
                        <Icon name="ei-sc-facebook" size="s" noFill={true} />Log in
              </a>
                    <a href={vkLink()} style={vkButtonStyle}>
                        <Icon name="ei-sc-vk" size="s" noFill={true} />
                        Log in
             </a>
                </div>
                <p>Already registered?</p>
                <form onSubmit={onSubmit}>
                    <Input name="username"
                        placeholder="Username..."
                        value={formState.values.username} {...text('username')} /><br />
                    <Input name="password"
                        placeholder="Password..."
                        value={formState.values.password} {...password('password')} /><br />
                    <Button onClick={onSubmit}>OK</Button>
                </form>
            </div>
        </div>
    );
}

export default Login;

const socialButtonsStyle = {
    display: 'flex',
    justifyContent: 'space-evenly',
    padding: '4px'
};

const facebookButtonStyle = {
    color: '#fff',
    padding: '2px 14px',
    background: '#3b5998'
};

const vkButtonStyle = {
    color: '#fff',
    padding: '2px 14px',
    background: '#4c75a3'
};