import { describe, expect, it } from 'vitest'
import {
  findNearestTimeSlotIndex,
  formatTimeSlot,
  fromMinutes,
  generateTimeSlots,
  toMinutes,
  useTimeUtils,
} from '../../composables/useTimeUtils'

describe('useTimeUtils', () => {
  it('formats HH:MM slots for shared picker display', () => {
    expect(formatTimeSlot('00:00')).toBe('00:00')
    expect(formatTimeSlot('14:30', '12h')).toBe('2:30 PM')
  })

  it('converts between HH:MM strings and minute offsets', () => {
    expect(toMinutes('09:45')).toBe(585)
    expect(fromMinutes(585)).toBe('09:45')
  })

  it('finds the nearest slot index for scroll and highlight behavior', () => {
    const slots = generateTimeSlots('09:00', '10:00', 15)

    expect(findNearestTimeSlotIndex('09:37', slots)).toBe(2)
    expect(findNearestTimeSlotIndex('08:00', [])).toBe(-1)
  })

  it('exposes the shared slot helpers from the composable facade', () => {
    const utils = useTimeUtils()

    expect(utils.formatTimeSlot('23:15', '12h')).toBe('11:15 PM')
    expect(utils.findNearestTimeSlotIndex('10:20', ['10:00', '10:30'])).toBe(1)
  })
})