import { describe, expect, it } from 'vitest'

import { formatChatDayLabel, formatEventDayTimeRange, toLocalDayKey } from '@/lib/formatters'

describe('formatChatDayLabel', () => {
  it('returns امروز، فردا and دیروز for nearby days', () => {
    const now = new Date('2026-07-31T15:00:00')

    expect(formatChatDayLabel('2026-07-31T08:00:00', now)).toBe('امروز')
    expect(formatChatDayLabel('2026-08-01T08:00:00', now)).toBe('فردا')
    expect(formatChatDayLabel('2026-07-30T08:00:00', now)).toBe('دیروز')
    expect(formatChatDayLabel('2026-07-28T08:00:00', now)).not.toMatch(/امروز|فردا|دیروز/)
  })

  it('builds stable local day keys', () => {
    expect(toLocalDayKey('2026-07-31T23:30:00')).toMatch(/^\d{4}-\d{2}-\d{2}$/)
  })
})

describe('formatEventDayTimeRange', () => {
  it('joins day label with start and end times', () => {
    const now = new Date('2026-07-31T12:00:00')
    const label = formatEventDayTimeRange('2026-07-31T14:30:00', '2026-07-31T17:00:00', now)

    expect(label.startsWith('امروز')).toBe(true)
    expect(label).toContain('تا')
  })
})