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

import { formatIranianMobile, formatPersianDate, truncateValue } from '@/lib/formatters'

describe('formatPersianDate', () => {
  it('returns the fallback for empty and invalid values', () => {
    expect(formatPersianDate(null)).toBe('—')
    expect(formatPersianDate('not-a-date')).toBe('—')
    expect(formatPersianDate('not-a-date', { dateStyle: 'medium' }, 'نامعتبر')).toBe('نامعتبر')
  })

  it('formats valid dates using the Persian locale and requested options', () => {
    const value = formatPersianDate('2025-01-01T12:30:00.000Z', { dateStyle: 'medium' })

    expect(value).toMatch(/[۰-۹]/)
  })

  it('uses Asia/Tehran so SSR (UTC) and client timezones match', () => {
    const utcEnv = new Intl.DateTimeFormat('fa-IR', { dateStyle: 'medium', timeStyle: 'short', timeZone: 'UTC' }).format(
      new Date('2026-08-27T08:00:00.000Z')
    )
    const display = formatPersianDate('2026-08-27T08:00:00.000Z')

    expect(display).not.toBe(utcEnv)
    expect(display).toBe(
      new Intl.DateTimeFormat('fa-IR', {
        dateStyle: 'medium',
        timeStyle: 'short',
        timeZone: 'Asia/Tehran',
      }).format(new Date('2026-08-27T08:00:00.000Z'))
    )
  })
})

describe('formatIranianMobile', () => {
  it('normalizes an Iranian country-code number', () => {
    expect(formatIranianMobile('989121234567')).toBe('09121234567')
  })

  it('keeps other strings and handles missing values', () => {
    expect(formatIranianMobile('09121234567')).toBe('09121234567')
    expect(formatIranianMobile(undefined)).toBe('—')
  })
})

describe('truncateValue', () => {
  it('truncates long text with a single ellipsis character', () => {
    expect(truncateValue('abcdefgh', 5)).toBe('abcde…')
  })

  it('keeps short text and handles blank values', () => {
    expect(truncateValue('short', 5)).toBe('short')
    expect(truncateValue('  ')).toBe('—')
  })
})