import { describe, expect, it } from 'vitest'
import { formatRelativeDate } from '../relativeDate'

const now = new Date('2026-08-25T12:00:00Z')

describe('formatRelativeDate', () => {
	it('formats under an hour in minutes', () => {
		expect(formatRelativeDate('2026-08-25T11:45:00Z', now)).toBe('15 minutes ago')
	})

	it('clamps a sub-minute difference to "1 minute ago"', () => {
		expect(formatRelativeDate('2026-08-25T11:59:45Z', now)).toBe('1 minute ago')
	})

	it('uses the singular for exactly one minute ago', () => {
		expect(formatRelativeDate('2026-08-25T11:59:00Z', now)).toBe('1 minute ago')
	})

	it('formats under a day in hours', () => {
		expect(formatRelativeDate('2026-08-25T10:00:00Z', now)).toBe('2 hours ago')
	})

	it('uses the singular for exactly one hour ago', () => {
		expect(formatRelativeDate('2026-08-25T11:00:00Z', now)).toBe('1 hour ago')
	})

	it('formats exactly one day back as Yesterday', () => {
		expect(formatRelativeDate('2026-08-24T11:00:00Z', now)).toBe('Yesterday')
	})

	it('formats within the week in days', () => {
		expect(formatRelativeDate('2026-08-22T12:00:00Z', now)).toBe('3 days ago')
	})

	it('formats exactly 7 days ago as an absolute date, not "7 days ago"', () => {
		expect(formatRelativeDate('2026-08-18T12:00:00Z', now)).toBe('18 Aug 2026')
	})

	it('formats a week or more ago as an absolute date', () => {
		expect(formatRelativeDate('2026-08-10T12:00:00Z', now)).toBe('10 Aug 2026')
	})
})