import React, { useState } from 'react';
import { ContentSection } from 'react-benzin';
import { Link, TextField, Button } from '@material-ui/core';
import { makeStyles } from '@material-ui/core/styles';
import { useAuth } from '../../hooks/useAuth';


const useStyles = makeStyles(theme => ({
  form: {
    width: theme.spacing(50),
    display: 'flex',
    flexDirection: 'column',
    '& > *': {
      margin: theme.spacing(1)
    }
  },
}));


const LoginSection: React.FC = () => {
  const classes = useStyles();
  const { login, isAuthenticated } = useAuth();
  const [username, setUsername] = useState<string>('');
  const [password, setPassword] = useState<string>('');

  const handleChangeUsername = (event: React.ChangeEvent<HTMLInputElement>) => {
    setUsername(event.target.value);
  };

  const handleChangePassword = (event: React.ChangeEvent<HTMLInputElement>) => {
    setPassword(event.target.value);
  };

  const handleSubmit = () => login(username, password);

  return isAuthenticated ? null : (
    <ContentSection sectionName="Login" level={1}>
      Log in using your <Link href="https://edufpmi.bsu.by">EDUFPMI</Link> credentials
      <p className={classes.form}>
        <TextField
          onChange={handleChangeUsername}
          variant="outlined"
          label="Username"
        />
        <TextField
          onChange={handleChangePassword}
          variant="outlined"
          label="Password"
          type="password"
        />
        <Button
          onClick={handleSubmit}
          variant="contained"
          size="large"
          color="primary"
        >
          Login
        </Button>
      </p>
    </ContentSection>
  );
};

export default LoginSection;
