import React, {useState, useRef} from 'react';
import {makeStyles} from '@material-ui/core/styles';
import TextField from '@material-ui/core/TextField';
import Button from '@material-ui/core/Button';

interface PropTypes {
  logIn: (name: string, password: string) => Promise<boolean>;
  setAuthorization: (authorization: { authorize: string }) => void ;
}

const useStyles = makeStyles(theme => ({
  root: {
    '& > *': {
      margin: theme.spacing(1),
      width: '25ch'
    },
    display: 'flex',
    flexDirection: 'column',
    alignItems: 'center',
    textAlign: 'center'
  },
  formTransfer: {
    display: 'flex',
   justifyContent: 'center'
  },
  transferButton: {
    marginLeft: 10,
   color: 'green'
  },
  formHeader: {
    textAlign: 'center',
    fontSize: 25
  }
}));

const SignInForm: React.FC<PropTypes> = ({logIn, setAuthorization}) => {
  const [error, setError] = useState<boolean>(false);
  const classes = useStyles();
  const nameRef = useRef<HTMLInputElement>();
  const passwordRef = useRef<HTMLInputElement>();

  const onClick = async () => {
    const name = nameRef.current?.value;
    const password = passwordRef.current?.value;
    if (name && password) {
      logIn(name, password).then(success => {
        if (!success) setError(true);
      });
    }
  };

  const handleSignUp = () => {
    setAuthorization({authorize: 'signUp'});
  };

  return (
    <>
    <div className={classes.formHeader}>Sign In</div>
      <form className={classes.root} noValidate autoComplete="off">
        <TextField
          inputRef={nameRef}
          error={error}
          label="Login"
        />
        <TextField
          inputRef={passwordRef}
          error={error}
          helperText={error && 'Invalid credentials'}
          label="Password"
          type="password"
        />
        <Button variant="contained" onClick={onClick}>submit</Button>
      </form>
      <div className={classes.formTransfer}>
        <div>Don't have an account?</div>
        <div onClick={handleSignUp} className={classes.transferButton}>Sign Up</div>
      </div>
    </>
  );
};

export default SignInForm;