import { describe, it, expect } from 'vitest'
import { getEscalationThreshold } from '@/lib/notifications/capa-escalation'

describe('getEscalationThreshold', () => {
  function daysFromNow(n: number): string {
    const d = new Date()
    d.setDate(d.getDate() + n)
    return d.toISOString().split('T')[0]
  }

  it('returns warning_3d when due in 3 days', () => {
    expect(getEscalationThreshold(daysFromNow(3))).toBe('warning_3d')
  })

  it('returns due_today when due today', () => {
    expect(getEscalationThreshold(daysFromNow(0))).toBe('due_today')
  })

  it('returns overdue_3d when 3 days past due', () => {
    expect(getEscalationThreshold(daysFromNow(-3))).toBe('overdue_3d')
  })

  it('returns overdue_7d when 7 days past due', () => {
    expect(getEscalationThreshold(daysFromNow(-7))).toBe('overdue_7d')
  })

  it('returns null for 2 days before due (no threshold)', () => {
    expect(getEscalationThreshold(daysFromNow(2))).toBeNull()
  })

  it('returns null for 4 days before due', () => {
    expect(getEscalationThreshold(daysFromNow(4))).toBeNull()
  })
})