// https://blog.webdevsimplified.com/2020-07/relative-time-format/

const formatter = new Intl.RelativeTimeFormat(undefined, {
	numeric: 'auto',
})

const DIVISIONS = [
	{ amount: 60, name: 'seconds' },
	{ amount: 60, name: 'minutes' },
	{ amount: 24, name: 'hours' },
	{ amount: 7, name: 'days' },
	{ amount: 4.34524, name: 'weeks' },
	{ amount: 12, name: 'months' },
	{ amount: Number.POSITIVE_INFINITY, name: 'years' },
]

export const formatTimeAgo = (date) => {
	let duration = (date - new Date()) / 1000

	for (let i = 0; i < DIVISIONS.length; i++) {
		const division = DIVISIONS[i]
		if (Math.abs(duration) < division.amount) {
			return formatter.format(Math.round(duration), division.name)
		}
		duration /= division.amount
	}
}