import React, { useState, useRef } from 'react';
import Alert from 'terra-alert';
import Button from 'terra-button';
import ShowHide, { ShowHideFocuser } from 'terra-show-hide';
import classNames from 'classnames/bind';

import styles from './LongTextExample.module.scss';

const cx = classNames.bind(styles);

const LongTextAlert = () => {
  const focusRef = useRef(null);
  const [isOpen, setIsOpen] = useState(true);
  const [isTextOpen, setIsTextOpen] = useState(false);
  const previewText = 'Four score and seven years ago our fathers brought forth on this continent, a new nation, conceived in Liberty, and dedicated to the proposition that all men are created equal.';
  const paragraph = 'Now we are engaged in a great civil war, testing whether that nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battle-field of that war. We have come to dedicate a portion of that field, as a final resting place for those who here gave their lives that that nation might live. It is altogether fitting and proper that we should do this.';

  return (
    <>
      <div aria-live="polite">
        {isOpen && (
          <Alert
            type="info"
            title="Gettysburg Address:"
            onDismiss={() => {
              setIsOpen(false);
            }}
          >
            <ShowHide
              focusRef={focusRef}
              preview={previewText}
              isOpen={isTextOpen}
              onChange={() => {
                setIsTextOpen(!isTextOpen);
              }}
              className={cx('long-text-example')}
            >
              <p>{previewText}</p>
              <p>
                <ShowHideFocuser ref={focusRef} focusableText={paragraph} />
              </p>
              <p>
                But, in a larger sense, we can not dedicate -- we can not
                consecrate -- we can not hallow -- this ground. The brave men,
                living and dead, who struggled here, have consecrated it, far
                above our poor power to add or detract. The world will little
                note, nor long remember what we say here, but it can never forget
                what they did here. It is for us the living, rather, to be
                dedicated here to the unfinished work which they who fought here
                have thus far so nobly advanced. It is rather for us to be here
                dedicated to the great task remaining before us -- that from these
                honored dead we take increased devotion to that cause for which
                they gave the last full measure of devotion -- that we here highly
                resolve that these dead shall not have died in vain -- that this
                nation, under God, shall have a new birth of freedom -- and that
                government of the people, by the people, for the people, shall not
                perish from the earth.
              </p>
            </ShowHide>
          </Alert>
        )}
      </div>
      <br />
      <Button
        isDisabled={isOpen}
        text="Trigger Alert"
        onClick={() => {
          setIsOpen(true);
        }}
      />
    </>
  );
};

export default LongTextAlert;