import { Flex, useColorModeValue, chakra } from '@chakra-ui/react';
import React from 'react';

import { useScrollDirection } from 'lib/contexts/scrollDirection';
import useIsSticky from 'lib/hooks/useIsSticky';

type Props = {
  children: React.ReactNode;
  className?: string;
}

const TOP_UP = 106;
const TOP_DOWN = 0;

const ActionBar = ({ children, className }: Props) => {
  const ref = React.useRef<HTMLDivElement>(null);
  const scrollDirection = useScrollDirection();
  const isSticky = useIsSticky(ref, TOP_UP + 5);
  const bgColor = useColorModeValue('white', 'black');

  if (!React.Children.toArray(children).filter(Boolean).length) {
    return null;
  }

  return (
    <Flex
      className={ className }
      backgroundColor={ bgColor }
      py={ 6 }
      mx={{ base: -4, lg: 0 }}
      px={{ base: 4, lg: 0 }}
      justifyContent="space-between"
      width={{ base: '100vw', lg: 'unset' }}
      position="sticky"
      top={{ base: scrollDirection === 'down' ? `${ TOP_DOWN }px` : `${ TOP_UP }px`, lg: 0 }}
      transitionProperty="top,box-shadow,background-color,color"
      transitionDuration="normal"
      zIndex={{ base: 'sticky2', lg: 'docked' }}
      boxShadow={{ base: isSticky ? 'md' : 'none', lg: 'none' }}
      ref={ ref }
    >
      { children }
    </Flex>
  );
};

export default chakra(ActionBar);
