"use client"

import { useInView, useMotionValue, useSpring } from "motion/react"
import { type ComponentPropsWithoutRef, useEffect, useRef } from "react"

import { cn } from "@/lib/utils"

interface NumberTickerProps extends ComponentPropsWithoutRef<"span"> {
	value: number
	startValue?: number
	direction?: "up" | "down"
	delay?: number
	decimalPlaces?: number
}

export function NumberTicker({
	value,
	startValue = 0,
	direction = "up",
	delay = 0,
	className,
	decimalPlaces = 0,
	...props
}: NumberTickerProps) {
	const ref = useRef<HTMLSpanElement>(null)
	const motionValue = useMotionValue(direction === "down" ? value : startValue)
	const springValue = useSpring(motionValue, {
		damping: 30,
		stiffness: 200,
	})
	const isInView = useInView(ref, { once: true, margin: "0px" })

	useEffect(() => {
		if (isInView) {
			const timer = setTimeout(() => {
				motionValue.set(direction === "down" ? startValue : value)
			}, delay * 1000)
			return () => clearTimeout(timer)
		}
	}, [motionValue, isInView, delay, value, direction, startValue])

	useEffect(
		() =>
			springValue.on("change", (latest) => {
				if (ref.current) {
					ref.current.textContent = Number(latest.toFixed(decimalPlaces)).toString()
				}
			}),
		[springValue, decimalPlaces],
	)

	return (
		<span ref={ref} className={cn("inline-block tabular-nums tracking-wider", className)} {...props}>
			{startValue}
		</span>
	)
}