import React, { useRef, useEffect, useState } from 'react'
import './index.less'
import styled from 'styled-components'

interface TextScrollProps {
	/**
	 * 持续时间/s
	 */
	duration: number,
	children: React.ReactElement,
}

function TextScroll(props: TextScrollProps) {
	const { duration, children } = props

	const defaultState = {
		contentWidth: 0,
		right: 0,
		duration,
	}

	const [state, setState] = useState(defaultState)

	let ref = useRef<HTMLParagraphElement>(null)

	useEffect(() => {
		const { offsetWidth, parentElement } = ref.current as HTMLParagraphElement
		setState({
			...state,
			contentWidth: offsetWidth,
			right: parentElement!.offsetWidth,
		})
	}, [])

	const { contentWidth, right, duration: timing } = state

	const animationName = `marquee_${contentWidth}`
	console.log(11111, right, contentWidth);

	const Text = styled.div`
		position: relative;
		left: ${right}px;
		animation: ${animationName} ${timing}s linear infinite both;
		animation-play-state: running;
		animation-fill-mode: forwards;

		@keyframes ${animationName} {
		0% {
			transform: translateX(0px);
		}
		100% {
			transform: translateX(${contentWidth - right}px);
		}
		}
	`

	return (
		<div className="marquee_box">
			<Text ref={ref}>{children}</Text>
		</div>
	)
}
TextScroll.defaultProps = {
	content: '',
	duration: 3,
}

export default React.memo(TextScroll)